WO2018061806A1 - 挿入物およびその挿入物を備えた光音響計測装置並びに挿入物の製造方法 - Google Patents
挿入物およびその挿入物を備えた光音響計測装置並びに挿入物の製造方法 Download PDFInfo
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- WO2018061806A1 WO2018061806A1 PCT/JP2017/033345 JP2017033345W WO2018061806A1 WO 2018061806 A1 WO2018061806 A1 WO 2018061806A1 JP 2017033345 W JP2017033345 W JP 2017033345W WO 2018061806 A1 WO2018061806 A1 WO 2018061806A1
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- Prior art keywords
- light
- insert
- photoacoustic
- photoacoustic wave
- puncture needle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0093—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy
- A61B5/0095—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy by applying light and detecting acoustic waves, i.e. photoacoustic measurements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body of the patient
- A61B5/061—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6848—Needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Clinical applications
- A61B8/0833—Clinical applications involving detecting or locating foreign bodies or organic structures
- A61B8/0841—Clinical applications involving detecting or locating foreign bodies or organic structures for locating instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4416—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to combined acquisition of different diagnostic modalities, e.g. combination of ultrasound and X-ray acquisitions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2418—Probes using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
- A61B2017/3413—Needle locating or guiding means guided by ultrasound
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/37—Surgical systems with images on a monitor during operation
- A61B2090/373—Surgical systems with images on a monitor during operation using light, e.g. by using optical scanners
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/37—Surgical systems with images on a monitor during operation
- A61B2090/378—Surgical systems with images on a monitor during operation using ultrasound
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3937—Visible markers
- A61B2090/3945—Active visible markers, e.g. light emitting diodes
Definitions
- the present invention includes a photoacoustic wave generation unit that generates a photoacoustic wave by absorbing light, and an insert in which at least a part is inserted into a subject, a photoacoustic measurement apparatus including the insert, and an insert It relates to the manufacturing method.
- An ultrasonic inspection method is known as a kind of image inspection method capable of non-invasively examining the state inside a living body.
- an ultrasonic probe capable of transmitting and receiving ultrasonic waves is used.
- the ultrasonic waves travel inside the living body and are reflected at the tissue interface.
- the reflected ultrasound is received by the ultrasound probe, and the internal state can be imaged by calculating the distance based on the time until the reflected ultrasound returns to the ultrasound probe. .
- photoacoustic imaging in which the inside of a living body is imaged using the photoacoustic effect.
- a living body is irradiated with pulsed laser light. Inside the living body, the living tissue absorbs the energy of the pulsed laser light, and ultrasonic waves (photoacoustic waves) are generated by adiabatic expansion due to the energy.
- ultrasonic waves photoacoustic waves
- Patent Literature 1 proposes a puncture needle provided with a photoacoustic wave generation unit that absorbs light and generates a photoacoustic wave near the tip.
- a puncture needle provided with a photoacoustic wave generation unit that absorbs light and generates a photoacoustic wave near the tip.
- an optical fiber is provided up to the tip of the puncture needle, and light guided by the optical fiber is applied to the photoacoustic wave generation unit.
- the photoacoustic wave generated in the photoacoustic wave generation unit is detected by an ultrasonic probe, and a photoacoustic image is generated based on the detection signal.
- the portion of the photoacoustic wave generation unit appears as a bright spot, and the position of the puncture needle can be confirmed using the photoacoustic image.
- the photoacoustic wave generated from the photoacoustic wave generator is emitted mainly from an opening formed at the tip of the puncture needle. Is done.
- the opening at the tip of the puncture needle is directed toward the blood vessel, so that when the insertion is performed without directing the surface on the opening side of the puncture needle toward the ultrasonic probe. Since the photoacoustic wave is reflected by the metal surface inside the puncture needle opposite to the opening side of the puncture needle, the signal intensity of the photoacoustic wave detected by the ultrasonic probe is weakened, and the tip of the puncture needle There is a problem that the visibility of is weakened.
- a photoacoustic wave reflected by a metal surface inside the puncture needle and traveling in a direction different from the direction of the ultrasonic probe may cause a strong artifact in an unintended place.
- the present invention aims to provide an insert that can detect the tip of an insert such as a puncture needle with high sensitivity, a photoacoustic measuring device including the insert, and a method for manufacturing the insert. It is what.
- the insert of the present invention has an insert body formed in a hollow shape having an opening at the tip and at least a tip portion inserted into the subject, and the length of the insert body in the hollow portion of the insert body.
- the light guide member provided along the direction and the light exit end of the light guide member disposed on the distal end side of the insert body, and absorbs light emitted from the light exit end to generate a photoacoustic wave.
- a through-hole is formed in the wall portion forming the hollow portion, and the photoacoustic wave generation portion is fixed to the through-hole.
- the through hole can have a shape extending in the length direction from the direction orthogonal to the length direction of the insert body.
- the same material as the photoacoustic wave generating part can be filled in the through hole, and the tip part of the photoacoustic wave generating part and the light guide member can be fixed to the wall part.
- the photoacoustic wave generating part can be fixed to the through hole with resin, and the resin can be filled into the through hole.
- the resin is preferably a photo-curing resin.
- the photocurable resin is preferably a resin that is cured by visible light or ultraviolet light.
- the photoacoustic wave generating part can be formed from a black resin.
- the photoacoustic wave generation unit can be formed of a material that transmits visible light.
- the photoacoustic wave generation unit can be formed of a material that transmits visible light and absorbs near infrared light.
- the photoacoustic wave generation unit can be formed of a material containing a pigment that transmits visible light and absorbs near infrared light and a photo-curing resin.
- the light guide member is preferably an optical fiber.
- the insert body is preferably a needle that is punctured by the subject.
- the photoacoustic measurement device of the present invention includes the insert of the present invention, a light source unit that emits light absorbed by the photoacoustic wave generation unit of the insert, and at least a part of the insert inserted into the subject. And an acoustic wave detection unit that detects a photoacoustic wave emitted from the photoacoustic wave generation unit.
- the photoacoustic wave generation unit can be formed of a material that transmits visible light, and the light source unit emits light absorbed by the photoacoustic wave generation unit. 1 light source and a second light source that emits visible light.
- the first light source can emit near-infrared light.
- the second light source can emit visible light from the surface of the casing of the light source unit to the outside.
- the light source unit includes an optical member that causes the light emitted from the first light source and the visible light emitted from the second light source to enter the light guide member of the insert. Can be provided.
- the optical member can include a multiplexing prism.
- the optical member can include a fiber combiner.
- the optical member can include a condensing lens that condenses both the light emitted from the first light source and the light emitted from the second light source.
- an optical member guides the light radiate
- the light emitted from the first optical fiber is incident on the light guide member at the positions of the light emitting end of the first optical fiber and the light emitting end of the second optical fiber.
- a fiber switching unit that switches between the first position and the second position where the light emitted from the second optical fiber enters the light guide member can be provided.
- the light guide member is inserted into the hollow portion of the insert, the light emission end of the light guide member is disposed on the through hole, and then the light emission end of the light guide member.
- the material for forming the photoacoustic wave generating part is supplied to the through hole, and the through hole is filled with the material. After the filling, the material is cured.
- a second method for manufacturing an insert according to the present invention is a method for manufacturing an insert in which a photoacoustic wave generation unit in an insertion unit is formed of a material that transmits light guided by a light guide member. After forming the photoacoustic wave generating part at the light emitting end of the member, the light guide member provided with the photoacoustic wave generating part is inserted into the hollow part of the insert, and the photoacoustic wave generating part is placed over the through-hole. After being disposed on the photoacoustic wave generator, the photocurable resin is supplied to the photoacoustic wave generation unit, the through hole is filled with the photocurable resin, and the light guided by the light guide member is irradiated onto the photocurable resin. Harden.
- the 3rd manufacturing method of the insert of the present invention is a manufacturing method of the insert formed from the material containing the photocuring resin which the photoacoustic wave generation part in the insertion part hardens with the light guided by the light guide member.
- the light guide member is inserted into the hollow portion of the insert, and the light emitting end of the light guide member is disposed on the through hole, and then a material containing a photocurable resin with respect to the light emitting end of the light guide member. While being supplied, the through hole is filled with the above-described material, and is cured by irradiating the light curable resin with the light guided by the light guide member.
- the insert of the present invention has an insert body formed in a hollow shape having an opening at the tip and at least a tip portion inserted into the subject, and the length of the insert body in the hollow portion of the insert body.
- the light guide member provided along the direction and the light exit end of the light guide member disposed on the distal end side of the insert body, and absorbs light emitted from the light exit end to generate a photoacoustic wave.
- tip of an insert can be detected with sufficient sensitivity.
- the block diagram which shows schematic structure of the photoacoustic image generation apparatus provided with the puncture needle using 1st Embodiment of the insert of this invention.
- Flow chart for explaining photoacoustic image generation processing Flow chart for explaining ultrasonic image generation processing
- the figure which shows one Embodiment of the puncture needle which provided multiple through-holes External view of an example of laser unit used for disconnection detection The figure which shows the internal structure of an example of the laser unit used for a disconnection detection
- the figure which shows the internal structure of the other example of the laser unit used for a disconnection detection The figure which shows the internal structure of the other example of the laser unit used for a disconnection detection The figure which shows the internal structure of the other example of the laser unit used for a disconnection detection The figure which shows the internal structure of the other example of the laser unit used for a disconnection detection The
- FIG. 1 is a diagram illustrating a schematic configuration of a photoacoustic image generation apparatus 10 according to the present embodiment.
- the photoacoustic image generation apparatus 10 of this embodiment includes an ultrasonic probe 11, an ultrasonic unit 12, a laser unit 13, and a puncture needle 15, as shown in FIG.
- the puncture needle 15 and the laser unit 13 are connected by an optical cable 70 having an optical fiber.
- the optical cable 70 includes a portion obtained by extending the optical fiber 14 in the puncture needle 15 to be described later.
- a connector 72 is provided at an end of the optical cable 70, and the laser unit 13 is connected to the connector 72.
- the puncture needle 15 and the optical cable 70 are configured to be disposable.
- an ultrasonic wave is used as an acoustic wave.
- the ultrasonic wave is not limited to an ultrasonic wave.
- an audible frequency is not limited.
- An acoustic wave may be used.
- the puncture needle 15 is connected to a syringe, an infusion tube, or the like and can be used for injecting a chemical solution.
- the laser unit 13 corresponds to the light source unit of the present invention, and includes, for example, a semiconductor laser light source.
- Laser light emitted from the laser diode light source of the laser unit 13 is guided by the optical cable 70 and enters the puncture needle 15.
- the laser unit 13 of this embodiment emits pulsed laser light in the near infrared wavelength region.
- the near-infrared wavelength region means a wavelength region of about 700 nm to 2000 nm.
- the laser diode light source is used.
- other laser light sources such as a solid laser light source, a fiber laser light source, and a gas laser light source may be used.
- a light source may be used.
- the puncture needle 15 is an embodiment of the insert of the present invention, and at least a part of the puncture needle 15 is a needle that punctures a subject.
- FIG. 2 is a diagram illustrating a configuration in the vicinity of the distal end portion of a puncture needle main body 15a (corresponding to an insert main body) that is a needle portion of the puncture needle 15.
- FIG. 2I shows a cross-sectional view including a central axis extending in the length direction of the puncture needle main body 15a
- FIG. 2II is a top view when the opening 15b side of the puncture needle main body 15a is on the upper side. As shown in FIGS.
- the puncture needle body 15a is made of, for example, metal, and has an opening 15b at the tip and is formed in a hollow shape.
- a through hole 15e is formed in the wall portion 15d forming the hollow portion 15c of the puncture needle body 15a.
- the diameter (inner diameter) of the hollow portion 15c of the puncture needle main body 15a may be any size as long as an optical fiber 14 described later can be provided, and is, for example, 0.13 mm or more and 2.64 mm or less.
- the through-hole 15e is a hole that penetrates from the hollow portion 15c of the puncture needle body 15a to the outside of the puncture needle body 15a, and is desirably formed by high-precision laser processing.
- the through hole 15e is formed in a circular shape.
- the diameter of the through-hole 15e is preferably larger than the diameter of the optical fiber from the viewpoint of propagation efficiency of the photoacoustic wave described later, fixation of the photoacoustic wave generator 16 and strength of the puncture needle body 15a, and is 80 ⁇ m or more, and It is desirable that the diameter is about 30% to 60% of the diameter of the hollow portion 15c of the puncture needle 15.
- the center C of the through hole 15e is preferably near the tip of the puncture needle body 15a.
- the vicinity of the distal end of the puncture needle body 15a is light that can image the position of the distal end of the puncture needle 15 with the accuracy required for the puncture operation when a photoacoustic wave generator 16 described later is disposed at the position of the through hole 15e. This is a position where an acoustic wave can be generated.
- the center C of the through-hole 15e is preferably in the opening 15b and, for example, within a range of 0.2 mm to 2 mm from the tip of the puncture needle body 15a.
- the through hole 15e is located on a straight line L passing through the most distal position P of the puncture needle main body 15a in the wall portion 15d forming the hollow portion 15c of the puncture needle main body 15a and extending in the length direction of the puncture needle main body 15a. It is desirable to form. Furthermore, it is more preferable that the center C of the through hole 15e is located on the straight line L.
- FIG. 3 is a diagram showing a configuration of the puncture needle 15 provided with the optical fiber 14 and the photoacoustic wave generation unit 16 with respect to the puncture needle main body 15a shown in FIG.
- FIG. 3I shows a cross-sectional view including a central axis extending in the length direction of the puncture needle 15, and
- FIG. 3II is a top view when the opening 15b side of the puncture needle 15 is on the upper side.
- the optical fiber 14 corresponding to the light guide member of the present invention is provided in the hollow portion 15c of the puncture needle body 15a along the length direction of the puncture needle body 15a.
- a photoacoustic wave generator 16 is provided at one end (light emitting end) 14a of the optical fiber 14 on the distal end side of the puncture needle body 15a.
- the light guided by the optical fiber in the optical cable 70 is guided by the optical fiber 14.
- the optical fiber 14 may be coated.
- polyimide, fluorine resin, acrylic resin, or the like can be used.
- the positions of the through-hole 15e, the photoacoustic wave generation unit 16 and the tip of the optical fiber 14 are determined by the photoacoustic wave generation unit 16 polishing the puncture needle 15 as shown in FIG.
- the photoacoustic wave generation unit 16 polishing the puncture needle 15 as shown in FIG.
- it is arranged inside the puncture needle 15 so as not to jump out from the surface 15f, it is preferable to arrange it as close as possible to the tip of the puncture needle 15 as long as it does not jump out from the polishing surface 15f.
- the photoacoustic wave generation unit 16 is provided at the light emitting end 14a of the optical fiber 14 as described above, and absorbs light emitted from the light emitting end 14a to generate a photoacoustic wave.
- the photoacoustic wave generator 16 is fixed to the through hole 15e.
- the optical fiber 14 is inserted into the hollow portion 15c of the puncture needle body 15a, and the light emitting end 14a of the optical fiber 14 is disposed on the through hole 15e. Thereafter, while supplying a material for forming the photoacoustic wave generation unit 16 to the light emitting end 14a of the optical fiber 14, the through hole 15e is filled with the material, and the material is cured after filling.
- the photoacoustic wave generation unit 16 is formed of a material including a light absorber that absorbs light guided by the optical fiber 14 and a resin that contains the light absorber.
- a material for forming the photoacoustic wave generation unit 16 for example, a synthetic resin such as an epoxy resin, a fluorine resin, a silicone resin, or a polyurethane resin mixed with a black pigment can be used. Moreover, you may make it mix
- the synthetic resin a thermosetting resin or a photocurable resin can be used.
- the photoacoustic wave generation unit 16 is drawn larger than the optical fiber 14. However, the photoacoustic wave generation unit 16 is approximately the same as the diameter of the optical fiber 14. May be the size.
- the photoacoustic wave generated in the photoacoustic wave generation unit 16 is transmitted not only from the opening 15b but also from the through hole 15e.
- the photoacoustic wave can be efficiently propagated on the surface side opposite to the opening 15b side of the puncture needle 15. Therefore, the tip of the puncture needle 15 can be detected with high sensitivity.
- the photoacoustic wave generated in the photoacoustic wave generator 16 is emitted from the through hole 15e without being reflected by the inner wall of the wall 15d forming the hollow portion 15c, the metal inside the puncture needle 15 described above Generation of artifacts due to photoacoustic waves reflected by the surface (inner wall) can be suppressed.
- the anchor effect can be obtained by filling the material forming the photoacoustic wave generating part 16 up to the through hole 15e and curing it, and the fixing of the photoacoustic wave generating part 16 can be strengthened.
- the ultrasonic probe 11 corresponds to the acoustic wave detection unit of the present invention, and has, for example, a plurality of detector elements (ultrasonic transducers) arranged one-dimensionally. Yes.
- the ultrasonic probe 11 detects the photoacoustic wave generated from the photoacoustic wave generation unit 16 after the puncture needle 15 is punctured in the subject.
- the ultrasound probe 11 transmits acoustic waves (ultrasound) to the subject and receives reflected acoustic waves (reflected ultrasound) for the transmitted ultrasound. Ultrasonic transmission and reception may be performed at separate positions.
- ultrasonic waves may be transmitted from a position different from the ultrasonic probe 11, and reflected ultrasonic waves for the transmitted ultrasonic waves may be received by the ultrasonic probe 11.
- the ultrasonic probe 11 is not limited to a linear ultrasonic probe, and may be a convex ultrasonic probe or a sector ultrasonic probe.
- the ultrasonic unit 12 includes a reception circuit 21, a reception memory 22, a data separation unit 23, a photoacoustic image generation unit 24, an ultrasonic image generation unit 25, an image output unit 26, a transmission control circuit 27, and a control unit 28.
- the ultrasonic unit 12 typically includes a processor, a memory, a bus, and the like.
- a program relating to photoacoustic image generation and ultrasonic image generation is incorporated in a memory.
- Functions of the data separation unit 23, the photoacoustic image generation unit 24, the ultrasonic image generation unit 25, and the image output unit 26 are realized by the program being operated by the control unit 28 configured by a processor. That is, each of these units is configured by a memory and a processor in which a program is incorporated.
- the hardware configuration of the ultrasonic unit 12 is not particularly limited. A plurality of integrated circuits (ICs), processors, ASICs (application specific integrated circuits), FPGAs (field-programmable gate arrays), memories, etc. It can implement
- ICs integrated circuits
- processors processors
- ASICs application specific integrated circuits
- FPGAs field-programmable gate arrays
- memories etc. It can implement
- the receiving circuit 21 receives the detection signal output from the ultrasound probe 11 and stores the received detection signal in the reception memory 22.
- the reception circuit 21 typically includes a low noise amplifier, a variable gain amplifier, a low-pass filter, and an AD converter (Analog-to-Digital converter).
- the detection signal of the ultrasonic probe 11 is amplified by a low noise amplifier, then gain adjusted according to the depth by a variable gain amplifier, and after a high frequency component is cut by a low-pass filter, it is converted into a digital signal by an AD converter. It is converted and stored in the reception memory 22.
- the receiving circuit 21 is composed of, for example, one IC (Integral circuit).
- the ultrasonic probe 11 outputs a photoacoustic wave detection signal and a reflected ultrasonic wave detection signal
- the reception memory 22 receives AD-converted photoacoustic wave and reflected ultrasonic wave detection signals (sampling data). Is stored.
- the data separation unit 23 reads out the sampling data of the photoacoustic wave detection signal from the reception memory 22 and transmits it to the photoacoustic image generation unit 24. Also, the reflected ultrasound sampling data is read from the reception memory 22 and transmitted to the ultrasound image generation unit 25.
- the photoacoustic image generation unit 24 generates a photoacoustic image based on the photoacoustic wave detection signal detected by the ultrasonic probe 11.
- the generation of the photoacoustic image includes, for example, image reconstruction such as phase matching addition, detection, logarithmic transformation, and the like.
- the ultrasonic image generation unit 25 generates an ultrasonic image (reflected acoustic wave image) based on the detection signal of the reflected ultrasonic wave detected by the ultrasonic probe 11.
- the generation of an ultrasonic image also includes image reconstruction such as phase matching addition, detection and logarithmic transformation.
- the image output unit 26 outputs the photoacoustic image and the ultrasonic image to the image display unit 30 such as a display device.
- the control unit 28 controls each unit in the ultrasonic unit 12. When acquiring a photoacoustic image, the control unit 28 transmits a trigger signal to the laser unit 13 to emit laser light from the laser unit 13. In addition, a sampling trigger signal is transmitted to the receiving circuit 21 in accordance with the emission of the laser light to control the photoacoustic wave sampling start timing and the like.
- the control unit 28 When acquiring the ultrasonic image, the control unit 28 transmits an ultrasonic transmission trigger signal for instructing the transmission control circuit 27 to perform ultrasonic transmission.
- the transmission control circuit 27 When receiving the ultrasonic transmission trigger signal, the transmission control circuit 27 transmits ultrasonic waves from the ultrasonic probe 11.
- the ultrasonic probe 11 detects reflected ultrasonic waves by scanning while shifting the acoustic lines line by line, for example.
- the control unit 28 transmits a sampling trigger signal to the receiving circuit 21 in synchronization with the timing of ultrasonic transmission, and starts sampling of reflected ultrasonic waves.
- the image acquisition conditions such as the frame rate, the number of laser emission per frame, the balance of the number of reflected acoustic wave signals per frame and the number of frames of the photoacoustic image signal are not shown in FIG.
- the controller 28 determines the light source driving conditions such as the laser emission timing, the number of laser pulses, and the current so as to correspond to the image acquisition conditions and uses them for driving the laser unit 13.
- the photoacoustic image generation process starts when the connector 72 of the optical cable 70 to which the puncture needle 15 is connected is connected to the laser unit 13.
- the control unit 28 of the ultrasonic unit 12 sends a trigger signal to the laser unit 13.
- the laser unit 13 Upon receiving the trigger signal, the laser unit 13 starts laser oscillation and emits pulsed laser light (S10).
- the pulsed laser light emitted from the laser unit 13 is guided by the optical cable 70 and enters the optical fiber 14 of the puncture needle 15. Then, the pulsed laser light is guided to the vicinity of the tip of the puncture needle 15 by the optical fiber 14 in the puncture needle 15 and irradiated to the photoacoustic wave generation unit 16.
- the photoacoustic wave generator 16 absorbs the pulsed laser beam and generates a photoacoustic wave (S12).
- a puncture needle 15 is punctured by a user such as a doctor at an arbitrary timing such as before and after driving the laser unit 13.
- the ultrasonic probe 11 detects the photoacoustic wave generated from the photoacoustic wave generation unit 16 by the irradiation of the laser light (S14).
- the photoacoustic wave detection signal output from the ultrasound probe 11 is received by the reception circuit 21, and the sampling data is stored in the reception memory 22.
- the photoacoustic image generation unit 24 receives the sampling data of the photoacoustic wave detection signal via the data separation unit 23, and generates a photoacoustic image (S16).
- the photoacoustic image generation unit 24 may apply a color map to convert the signal intensity in the photoacoustic image into a color.
- the photoacoustic image generated by the photoacoustic image generation unit 24 is input to the image output unit 26, and the image output unit 26 displays the photoacoustic image on the image display unit 30 (S18).
- the control unit 28 sends an ultrasonic transmission trigger signal to the transmission control circuit 27, and the transmission control circuit 27 transmits ultrasonic waves from the ultrasonic probe 11 in response thereto (S30).
- the ultrasonic probe 11 detects the reflected ultrasonic wave after transmitting the ultrasonic wave (S32).
- the detection signal is received by the reception circuit 21, and the sampling data is stored in the reception memory 22.
- the ultrasonic image generation unit 25 receives the sampling data of the ultrasonic detection signal via the data separation unit 23, and generates an ultrasonic image (S34).
- the ultrasonic image generation unit 25 may apply a color map to convert the signal intensity in the ultrasonic image into a color.
- the ultrasonic image generated by the ultrasonic image generation unit 25 is input to the image output unit 26, and the ultrasonic image is displayed on the image display unit 30 by the image output unit 26 (S36).
- the image display unit 30 may combine and display the photoacoustic image and the ultrasonic image. By doing in this way, it becomes possible to confirm where the tip of the puncture needle 15 is in the living body, so that accurate and safe puncture is possible. Further, in the present embodiment, since the photoacoustic wave can be emitted from the through hole 15e provided in the puncture needle 15 as described above, the visibility of the tip of the puncture needle 15 can be improved.
- the through hole 15e formed in the puncture needle body 15a is formed in a circular shape, but the puncture needle 15 of the second embodiment has the through hole 15e. It is formed by an ellipse.
- FIG. 6I shows a cross-sectional view of the puncture needle main body 15a of the puncture needle 15 of the second embodiment (a cross-sectional view including a central axis extending in the length direction of the puncture needle main body 15a), and FIG. 6II shows a puncture needle. It is a top view in case the opening 15b side of the main body 15a is the upper side.
- the through-hole 15e in the puncture needle 15 of the second embodiment is formed by an ellipse extending in the length direction from the direction orthogonal to the length direction of the puncture needle body 15a.
- the major axis of the through-hole 15e is preferably 0.3 mm to 2 mm longer than the minor axis from the viewpoint of propagation efficiency of the photoacoustic wave, fixation of the photoacoustic wave generator 16 and strength of the puncture needle body 15a.
- the center C of the through-hole 15e is preferably near the tip of the puncture needle body 15a, as in the case where the through-hole 15e is circular, for example, within a range of 0.2 mm to 2 mm from the tip of the puncture needle body 15a. It is preferable that
- the through hole 15e is located on a straight line L passing through the most distal position P of the puncture needle main body 15a in the wall portion 15d forming the hollow portion 15c of the puncture needle main body 15a and extending in the length direction of the puncture needle main body 15a. It is desirable to form. Furthermore, it is more preferable that the center C of the through hole 15e is located on the straight line L.
- FIG. 7 is a diagram showing a configuration of the puncture needle 15 provided with the optical fiber 14 and the photoacoustic wave generation unit 16 with respect to the puncture needle main body 15a shown in FIG.
- FIG. 7I shows a cross-sectional view including a central axis extending in the length direction of the puncture needle 15, and
- FIG. 7II is a top view when the opening 15b side of the puncture needle 15 is on the upper side.
- the through hole 15e is the same as the case where the through hole 15e is circular except that the shape of the through hole 15e is changed from a circle to an ellipse. As shown in FIGS.
- the opening area of the through-hole 15e can be increased by making the shape of the through-hole 15e elliptical, the surface side opposite to the opening 15b side of the puncture needle 15 Therefore, the photoacoustic wave can be propagated more efficiently. Further, the anchor effect can be improved as compared with the case where the through hole 15e is circular.
- the positions of the through holes 15e, the photoacoustic wave generation unit 16 and the tip of the optical fiber 14 are determined by the photoacoustic wave generation unit 16 polishing the puncture needle 15 as shown in FIG.
- the photoacoustic wave generation unit 16 polishing the puncture needle 15 as shown in FIG.
- it is arranged inside the puncture needle 15 so as not to jump out from the surface 15f, it is preferable to arrange it as close as possible to the tip of the puncture needle 15 as long as it does not jump out from the polishing surface 15f.
- the puncture needle 15 of the third embodiment will be described.
- the material for forming the photoacoustic wave generation unit 16 is supplied to the light emitting end of the optical fiber 14 to form the photoacoustic wave generation unit 16, and the material is used.
- the tip portion of the photoacoustic wave generation unit 16 and the optical fiber 14 is fixed to the wall 15d of the puncture needle body 15a.
- the puncture needle 15 of the third embodiment is The optical fiber 14 provided with the photoacoustic wave generating part 16 is fixed to the wall part 15d of the puncture needle main body 15a by a synthetic resin as an adhesive.
- FIG. 8 is a diagram illustrating an example of the puncture needle 15 of the third embodiment.
- FIG. 8I shows a cross-sectional view including a central axis extending in the length direction of the puncture needle 15, and
- FIG. 8II is a top view when the opening 15b side of the puncture needle 15 is on the upper side.
- the photoacoustic wave generation unit 16 is formed at the light emitting end 14 a of the optical fiber 14. After that, the optical fiber 14 provided with the photoacoustic wave generation unit 16 is inserted into the hollow portion 15c of the puncture needle body 15a, and the photoacoustic wave generation unit 16 is disposed on the through hole 15e.
- the through hole 15e is filled with the adhesive resin 17, and is cured after filling.
- a thermosetting resin and a photocuring resin can be used, but it is preferable to use a photocuring resin with a simpler treatment process.
- a photocurable resin for example, a resin that is cured by irradiation with visible light or a resin that is cured by irradiation with ultraviolet light can be used.
- the positions of the through holes 15e, the photoacoustic wave generating unit 16, the adhesive resin 17 and the tip of the optical fiber 14 are determined by the adhesive resin 17 as shown in FIG. 8I.
- 15 is arranged inside the puncture needle 15 so as not to jump out from the polishing surface 15f, but as an actual arrangement, it is arranged as close as possible to the tip of the puncture needle 15 within a range not protruding from the polishing surface 15f. preferable.
- the photocuring resin does not enter the inside of the puncture needle main body 15a too much because the range irradiated with light hardens.
- the optical fiber 14 thus provided with the photoacoustic wave generating part 16 By inserting the optical fiber 14 thus provided with the photoacoustic wave generating part 16 into the hollow part 15c of the puncture needle body 15a and fitting the photoacoustic wave generating part 16 into the through hole 15e.
- the arrangement of the photoacoustic wave generation unit 16 can be easily controlled, and the light emitting end 14a of the optical fiber 14 in the photoacoustic wave generation unit 16 can be easily arranged near the center of the through hole 15e. Thereby, a photoacoustic wave can be more efficiently propagated on the surface side opposite to the opening 15b side of the puncture needle 15.
- the light emitting end 14a of the optical fiber 14 is protected by the photoacoustic wave generating unit 16, so that the light emitting end 14a of the optical fiber 14 is protected. It is possible to prevent the puncture needle body 15a from being broken by colliding with the insertion opening or the inner wall of the optical fiber 14.
- the through hole 15e may be elliptical.
- FIG. 9 is a diagram showing the puncture needle 15 of the fourth embodiment in which the through hole 15e of the puncture needle 15 of the third embodiment is elliptical.
- FIG. 9I shows a cross-sectional view including a central axis extending in the length direction of the puncture needle 15 of the fourth embodiment, and
- FIG. 9II is a top view when the opening 15b side of the puncture needle 15 is the upper side. is there.
- the puncture needle 15 of the fourth embodiment is the same as the puncture needle 15 of the third embodiment, including the manufacturing method, except that the shape of the through hole 15e is elliptical.
- the size and arrangement of the through hole 15e when the shape of the through hole 15e is an ellipse are the same as those of the puncture needle 15 of the second embodiment shown in FIG.
- the position of the through hole 15e, the photoacoustic wave generation unit 16, the adhesive resin 17 and the tip of the optical fiber 14 is determined by the adhesive resin 17 as shown in FIG. 9I.
- 15 is arranged inside the puncture needle 15 so as not to jump out from the polishing surface 15f, but as an actual arrangement, it is arranged as close as possible to the tip of the puncture needle 15 within a range not protruding from the polishing surface 15f. preferable.
- the photocuring resin does not enter the inside of the puncture needle main body 15a too much because the range irradiated with light hardens.
- the puncture needle 15 of the fifth embodiment will be described.
- a black resin is used as a material for forming the photoacoustic wave generation unit 16, but the puncture needle 15 of the fifth embodiment uses an optical As a material for forming the acoustic wave generator 16, a material that absorbs the laser light emitted from the laser unit 13 and transmits visible light is used.
- a material in which a synthetic resin is mixed with a pigment that absorbs near-infrared light and transmits visible light can be used.
- the pigment that absorbs near-infrared light and transmits visible light include CWO (cesium tungsten oxide), LaB 6 (lanthanum hexaboride), ATO (antimony tin oxide), and ITO (indium tin oxide).
- CWO cesium tungsten oxide
- LaB 6 lanthanum hexaboride
- ATO antimony tin oxide
- ITO indium tin oxide
- FIG. 10 is a diagram illustrating the light transmission characteristics of CWO, LaB 6 , ATO, and ITO.
- titanium black such as TiO (titanium oxide) may be used.
- FIG. 11 is a diagram showing the light transmission characteristics of TiO.
- the photoacoustic wave generation unit 16 may transmit visible light so long as it has a transmittance of 40% or more with respect to at least a part of the wavelength band of visible light.
- the materials other than the material forming the photoacoustic wave generation unit 16 are the same as the puncture needle 15 of the first embodiment shown in FIG. 3 including the manufacturing method.
- the light transmittance can be controlled by changing the mixing concentration of the pigment into the resin. A thickness equivalent to that applied to the optical fiber 14 is applied to the slide glass, and the transmittance is measured with a spectrophotometer or the like. Can be measured and determined.
- the photoacoustic wave generation unit 16 As described above, by using a material that absorbs the laser light emitted from the laser unit 13 and transmits visible light as a material for forming the photoacoustic wave generation unit 16, it is possible to detect disconnection of the optical fiber 14 to be described later. Can be used. That is, for example, when no breakage occurs in the optical fiber 14, the light guided by the optical fiber 14 is emitted as it is from the light exit end 14 a of the optical fiber 14 and further passes through the photoacoustic wave generator 16. It can be observed from the opening 15b of the puncture needle 15.
- the optical fiber 14 when the optical fiber 14 is broken, the light guided by the optical fiber 14 leaks at the broken portion, so that it cannot be observed from the opening 15b of the puncture needle 15, or It can be observed only with weak intensity.
- the disconnection of the optical fiber 14 can be detected.
- the configuration for detecting disconnection of the optical fiber 14 will be described in detail later.
- the through-hole 15e may be elliptical like the puncture needle 15 of the second embodiment.
- the puncture needle 15 of the sixth embodiment in which the through hole 15e has an elliptical shape the puncture needle 15 and the manufacturing method of the second embodiment shown in FIG. It is the same including.
- the size and arrangement of the through holes 15e when the shape of the through holes 15e is an ellipse are the same as those of the puncture needle 15 of the second embodiment shown in FIG.
- the puncture needle 15 of 7th Embodiment is demonstrated.
- the puncture needle 15 of the seventh embodiment absorbs the laser light emitted from the laser unit 13 as a material for forming the photoacoustic wave generation unit 16, and
- An optical fiber 14 in which a photoacoustic wave generation unit 16 is formed using a material that transmits visible light and the above-described material is used with an adhesive as in the puncture needle 15 of the third embodiment shown in FIG. It is made to fix to the wall part 15d of the puncture needle main body 15a with a certain synthetic resin.
- the puncture needle 15 of the third embodiment shown in FIG. 8 and the manufacturing method are the same.
- the photoacoustic wave generation unit 16 is formed of a material that transmits visible light.
- the adhesive resin 17 can be irradiated through the acoustic wave generator 16, whereby the adhesive resin 17 can be cured.
- the above-mentioned CWO, LaB 6 , ATO, and TiO are used as the pigment contained in the photoacoustic wave generation unit 16, ultraviolet light is also transmitted, and therefore an ultraviolet light curable resin is also used as the adhesive resin 17. be able to.
- the through hole 15e may have an elliptical shape like the puncture needle 15 of the second embodiment.
- the puncture needle 15 of the eighth embodiment in which the through hole 15e has an elliptical shape is the same as the puncture needle 15 of the seventh embodiment, including the manufacturing method, except that the through hole 15e has an elliptical shape.
- the size and arrangement of the through holes 15e are the same as those of the puncture needle 15 of the second embodiment shown in FIG.
- the puncture needle 15 of the ninth embodiment absorbs the laser light emitted from the laser unit 13 as a material for forming the photoacoustic wave generator 16 in the puncture needle 15 of the first embodiment shown in FIG.
- a photo-curing resin containing a pigment that transmits visible light is used.
- CWO, LaB 6 , ATO, ITO, TiO, and the like can be used as a pigment that absorbs laser light (near infrared light) and transmits visible light.
- visible light curable resin and ultraviolet light curable resin can be used as the light curable resin, but when visible light curable resin is used, visible light guided by the optical fiber 14 is visible light.
- the photoacoustic wave generation part 16 can be formed by irradiating the cured resin. Further, when CWO, LaB 6 , ATO, and TiO are used as the pigment, ultraviolet light is also transmitted, and therefore, an ultraviolet light curable resin can also be used as the photocurable resin.
- the materials other than the material forming the photoacoustic wave generation unit 16 are the same as those of the puncture needle 15 of the first embodiment.
- the optical fiber 14 is inserted into the hollow portion 15c of the puncture needle body 15a, and the light emitting end 14a of the optical fiber 14 is disposed on the through hole 15e. To do. Then, the material including the pigment and the photo-curing resin is supplied to the light emitting end 14 a of the optical fiber 14, and the through hole 15 e is filled with the material and guided by the optical fiber 14. It hardens
- the through hole 15e may have an elliptical shape like the puncture needle 15 of the second embodiment.
- the puncture needle 15 of the tenth embodiment in which the through hole 15e has an elliptical shape is the same as the puncture needle 15 of the ninth embodiment, including the manufacturing method, except that the through hole 15e has an elliptical shape.
- the size and arrangement of the through holes 15e are the same as those of the puncture needle 15 of the second embodiment shown in FIG.
- the light guided by the optical fiber 14 is cured by irradiating the photocuring resin, and the photoacoustic wave generator 16 is formed and fixed.
- the heat treatment step for curing the synthetic resin anew can be omitted.
- the through hole 15e of the puncture needle 15 of the first to tenth embodiments may be formed in a tapered shape. That is, the opening on the outer wall side may be larger than the opening on the inner wall side of the puncture needle main body 15a of the through hole 15e.
- the disconnection can be detected even when the puncture needle 15 does not have the through hole 15e.
- FIG. 12 shows an embodiment of a puncture needle in which two through holes are provided in the puncture needle body.
- FIG. 12I shows a cross-sectional view including a central axis extending in the length direction of the puncture needle 18 having two through holes 18e, and
- FIG. 12II is a view of the puncture needle 18 shown in FIG. It is.
- the through hole 18e is provided at a position facing the puncture needle body 18a.
- the photoacoustic wave generation part 16 and the light emission end 14a of the optical fiber 14 are arrange
- the photoacoustic wave generation unit 16 is the same as the puncture needle 15 of the first embodiment.
- the optical fiber 14 is inserted into the puncture needle main body 18a, and a through hole 18e on the side where the photoacoustic wave generating unit 16 is provided (hereinafter referred to as a first through hole 18e).
- the light emission of the optical fiber 14 on the first through hole 18e while confirming the position of the light emission end 14a of the optical fiber 14 from the through hole 18e on the opposite side (hereinafter referred to as the second through hole 18e).
- An end 14a is disposed.
- the tip of the puncture needle 18 can be detected with high sensitivity.
- the two through holes 18e are provided.
- the number is not limited to two, and four through holes may be provided in the orthogonal direction.
- a plurality of through holes may be formed in the puncture needle main body 15a in the same manner as described above.
- FIG. 13 is an external view of an example of a laser unit 13 used for disconnection detection
- FIG. 14 is a diagram illustrating an internal configuration of an example of the laser unit 13 used for disconnection detection.
- a light source side connector 13b to which a connector 72 of an optical cable 70 is connected is provided on a side surface of the casing 13a.
- the details of the connection mechanism are not shown.
- a light emitting portion 13c from which visible light for detecting disconnection is emitted is provided on the upper surface of the housing 13a.
- a pulsed laser light source 40 that emits a pulsed laser light emitted to the photoacoustic wave generating unit 16 of the puncture needle 15, and a pulsed laser emitted from the pulsed laser light source 40
- a condensing lens 45 that makes light incident on an optical fiber in the optical cable 70 and a visible light source 43 that emits visible light for detecting disconnection are provided.
- the light emitting portion 13c is formed of a member that is transparent to the visible light emitted from the visible light source 43, and transmits visible light emitted from the visible light source 43 toward the outside from the surface of the housing 13a. Let it emit.
- a light incident end of the optical fiber 14 of the puncture needle 15 is brought close to the light emitting portion 13c and emitted from the light emitting portion 13c by a user such as a doctor.
- the visible light is incident from the light incident end of the optical fiber 14.
- the optical fiber 14 when the optical fiber 14 is not broken, the light guided by the optical fiber 14 is emitted as it is from the light emitting end 14a of the optical fiber 14, and further, the photoacoustic wave generating unit 16 can be observed through the opening 15 b of the puncture needle 15.
- the light guided by the optical fiber 14 when the optical fiber 14 is broken, the light guided by the optical fiber 14 leaks at the broken portion, so that it cannot be observed from the opening 15b of the puncture needle 15, or It can be observed only with weak intensity.
- the disconnection of the optical fiber 14 can be detected.
- emission of visible light from the visible light source 43 is controlled by the control unit 28 of the ultrasonic unit 12 to which the laser unit 13 is connected.
- the control unit 28 may cause the visible light source 43 to emit visible light in response to a user's instruction to detect disconnection from a predetermined input device (not shown).
- emission of visible light from the visible light source 43 is stopped. It may be. Or you may detect automatically that the connector 72 was connected to the light source side connector 13b, and may stop emission of visible light.
- the configuration of the laser unit 13 for detecting disconnection is not limited to the configuration shown in FIGS. 15 to 18 are diagrams showing the internal configuration of another embodiment of the laser unit 13 for detecting disconnection. Basically, in FIGS. 15 to 18, the visible light emitted from the visible light source 43 is made incident on the optical fiber in the optical cable 70 connected to the light source side connector 13b.
- the disconnection detection laser unit 13 shown in FIG. 15 includes a collimating lens 41 that collimates the pulse laser light emitted from the pulse laser light source 40, and a condensing lens that transmits the pulse laser light emitted from the pulse laser light source 40. And a collimating prism 42 that reflects the visible light emitted from the visible light source 43 and enters the condenser lens 45, and a collimator that causes the visible light emitted from the visible light source 43 to enter the combining prism 42. And a lens 44.
- the collimating lenses 41 and 44, the combining prism 42, and the condenser lens 45 correspond to the optical member of the present invention.
- Visible light incident on the optical cable 70 is guided by the optical fiber in the optical cable 70 and then guided by the optical fiber 14 in the puncture needle 15. Then, by observing visible light emitted from the opening 15 b of the puncture needle 15, disconnection of the optical fiber in the optical cable 70 and the optical fiber 14 in the puncture needle 15 can be detected.
- the disconnection detection laser unit 13 shown in FIG. 16 has a laser light optical fiber 46 that guides the pulse laser light emitted from the pulse laser light source 40 and a visible light that guides the visible light emitted from the visible light source 43.
- the optical fiber 47 for light the fiber combiner 48 that combines the pulsed laser light guided by the optical fiber 46 for laser light and the visible light guided by the optical fiber 47 for visible light, and the light emitted from the fiber combiner 48.
- a multiplexing optical fiber 49 that guides the pulsed laser beam and the visible light to enter the condensing lens 45.
- the optical fiber for laser light 46, the optical fiber for visible light 47, the fiber combiner 48, the optical fiber for multiplexing 49, and the condenser lens 45 correspond to the optical members of the present invention. It is.
- a condensing lens may be provided between the visible light source 43 and the visible light optical fiber 47 and between the pulse laser light source 40 and the laser light optical fiber 46.
- a pulsed light LD Laser Diode
- a visible light LED Light Emission Diode
- a chip 52 and a visible light LED chip 53 are provided, and a drive control board 51 for driving them is provided.
- the pulsed light LD chip 52 is disposed so that the focal position of the pulsed laser light emitted from the pulsed light LD chip 52 and condensed by the condenser lens 45 is positioned at the light incident end of the optical fiber of the optical cable 70. Yes. Thereby, the transmission efficiency to the optical fiber of the optical cable 70 can be maximized.
- the visible light LED chip 53 is arranged at a position where the optical axis thereof is deviated from the optical axis of the pulsed light LD chip 52, so the focal position of the visible light emitted from the visible light LED chip 53 is not necessarily the optical cable 70. It is not located at the light incident end of the optical fiber.
- the visible light emitted from the visible light LED chip 53 only needs to be incident on the optical fiber of the optical cable 70 to such an extent that disconnection can be detected.
- the condenser lens 45 corresponds to the optical member of the present invention.
- the disconnection detection laser unit 13 shown in FIG. 18 includes a first optical fiber 60 that guides the pulse laser beam emitted from the pulse laser light source 40 and a first optical fiber that guides the visible light emitted from the visible light source 43. 2 optical fibers 61.
- the first optical fiber 60 and the second optical fiber 61 are installed in the fiber switching unit 62.
- the fiber switching unit 62 is installed so as to be capable of reciprocating in the arrow Z direction shown in FIG. As the fiber switching unit 62 moves in the Z direction, the positions of the light emitting end of the first optical fiber 60 and the light emitting end of the second optical fiber 61 are changed so that the light emitted from the first optical fiber 60 is changed.
- the first position where the light enters the condenser lens 45 and the second position where the light emitted from the second optical fiber 61 enters the condenser lens 45 are switched.
- the first optical fiber 60, the second optical fiber 61, and the condenser lens 45 correspond to the optical member of the present invention. It is assumed that the length and arrangement of the first optical fiber 60 and the second optical fiber 61 are adjusted so that the first optical fiber 60 and the second optical fiber 61 bend sufficiently flexibly with respect to the movement of the fiber switching unit 62.
- the pulse laser light source 40 and the visible light source 43 may be mounted on the fiber switching unit 62 and moved together.
- the puncture needle 15 is considered as an insert, but the present invention is not limited to this.
- the insert may be a radiofrequency ablation needle containing an electrode used for radiofrequency ablation, a catheter inserted into a blood vessel, or a catheter inserted into a blood vessel. It may be a guide wire.
- the insert of the present invention is not limited to a needle such as an injection needle, and may be a biopsy needle used for biopsy. That is, it may be a biopsy needle that can puncture a living body inspection object and collect a tissue of a biopsy site in the inspection object. In that case, a photoacoustic wave may be generated in a collection part (inhalation port) for aspirating and collecting tissue at a biopsy site.
- the needle may be used as a guiding needle for puncturing up to a deep part, such as subcutaneous and intraabdominal organs.
- the insert and photoacoustic measuring device of this invention are not limited only to the said embodiment, Various corrections are carried out from the structure of the said embodiment. Further, modifications and changes are also included in the scope of the present invention. For example, the shape of the through-hole is changed from a circle to a square, and the shape of the hole is changed from an ellipse to a rectangle, or a shape in between is included in the scope of the invention. Or what changed the position of the through-hole of the front-end
- Photoacoustic image generating apparatus 11 Ultrasonic probe 12 Ultrasonic unit 13 Laser unit 13a Case 13b Light source side connector 13c Light emitting part 14 Optical fiber 14a Light emitting end 15 Puncture needle 15a Puncture needle main body 15b Opening 15c Hollow part 15d Wall part 15e Through-hole 16 Photoacoustic wave generation part 17 Adhesive resin 21 Reception circuit 22 Reception memory 23 Data separation part 24 Photoacoustic image generation part 25 Ultrasonic image generation part 26 Image output part 27 Transmission control circuit 28 Control part 30 Image Display unit 40 Pulse laser light source 40 Visible light source 40 Pulse laser light source 41, 44 Collimating lens 42 Combined prism 43 Visible light source 45 Condensing lens 46 Optical fiber for laser light 47 Optical fiber for visible light 48 Fiber combiner 49 Optical fiber for combining 51 Drive control board 52 Pulse light LD chip 53 Visible light LED chip 60 1st optical fiber 61 2nd optical fiber 62 Fiber switching part 70 Optical
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Abstract
Description
11 超音波探触子
12 超音波ユニット
13 レーザユニット
13a 筐体
13b 光源側コネクタ
13c 光出射部
14 光ファイバ
14a 光出射端
15 穿刺針
15a 穿刺針本体
15b 開口
15c 中空部
15d 壁部
15e 貫通孔
16 光音響波発生部
17 接着剤樹脂
21 受信回路
22 受信メモリ
23 データ分離部
24 光音響画像生成部
25 超音波画像生成部
26 画像出力部
27 送信制御回路
28 制御部
30 画像表示部
40 パルスレーザ光源
40 可視光源
40 パルスレーザ光源
41,44 コリメートレンズ
42 合波プリズム
43 可視光源
45 集光レンズ
46 レーザ光用光ファイバ
47 可視光用光ファイバ
48 ファイバコンバイナ
49 合波用光ファイバ
51 駆動制御基板
52 パルス光LDチップ
53 可視光LEDチップ
60 第1の光ファイバ
61 第2の光ファイバ
62 ファイバ切り換え部
70 光ケーブル
72 コネクタ
Claims (24)
- 先端に開口を有し、少なくとも先端部分が被検体内に挿入される中空状に形成された挿入物本体と、
前記挿入物本体の中空部に、前記挿入物本体の長さ方向に沿って設けられた導光部材と、
前記挿入物本体の前記先端側に配置される前記導光部材の光出射端に設けられ、該光出射端から出射される光を吸収して光音響波を発生する光音響波発生部とを備え、
前記中空部を形成する壁部に貫通孔が形成され、該貫通孔に対して前記光音響波発生部が固定されている挿入物。 - 前記貫通孔が、前記挿入物本体の長さ方向に直交する方向よりも前記長さ方向に伸びた形状である請求項1記載の挿入物。
- 前記貫通孔内に前記光音響波発生部と同じ材料が充填されて、前記光音響波発生部および前記導光部材の先端部分が前記壁部に固定されている請求項1または2記載の挿入物。
- 前記光音響波発生部が、樹脂によって前記貫通孔に対して固定され、前記貫通孔内に前記樹脂が充填されている請求項1または2記載の挿入物。
- 前記樹脂が、光硬化樹脂である請求項4記載の挿入物。
- 前記光硬化樹脂が、可視光または紫外光によって硬化する樹脂である請求項5記載の挿入物。
- 前記光音響波発生部が、黒色の樹脂から形成されている請求項1から6いずれか1項記載の挿入物。
- 前記光音響波発生部が、可視光を透過する材料から形成されている請求項1から7いずれか1項記載の挿入物。
- 前記光音響波発生部が、可視光を透過し、かつ近赤外を吸収する材料から形成されている請求項8記載の挿入物。
- 前記光音響波発生部が、可視光を透過し、かつ近赤外を吸収する顔料と光硬化樹脂とを含む材料から形成されている請求項9記載の挿入物。
- 前記導光部材が、光ファイバである請求項1から10いずれか1項記載の挿入物。
- 前記挿入物本体が、前記被検体に穿刺される針である請求項1から11いずれか1項記載の挿入物。
- 請求項1から12いずれか1項記載の挿入物と、
前記挿入物の前記光音響波発生部によって吸収される光を出射する光源部と、
前記挿入物の少なくとも一部が前記被検体内に挿入された後に、前記光音響波発生部から発せられた光音響波を検出する音響波検出部とを備えた光音響計測装置。 - 前記光音響波発生部が、可視光を透過する材料から形成され、
前記光源部が、前記光音響波発生部に吸収される光を出射する第1の光源と、前記可視光を出射する第2の光源とをそれぞれ備えた請求項13記載の光音響計測装置。 - 前記第1の光源が、近赤外光を出射する請求項14記載の光音響計測装置。
- 前記第2の光源が、前記光源部の筐体の表面から外部に向かって前記可視光を出射する請求項14または15記載の光音響計測装置。
- 前記光源部が、前記第1の光源から出射された光および前記第2の光源から出射された可視光を、前記挿入物の前記導光部材に入射させる光学部材を備えた請求項14から16いずれか1項記載の光音響計測装置。
- 前記光学部材が、合波プリズムを含む請求項17記載の光音響計測装置。
- 前記光学部材が、ファイバコンバイナを含む請求項17記載の光音響計測装置。
- 前記光学部材が、前記第1の光源から出射された光と前記第2の光源から出射された光の両方を集光する集光レンズを含む請求項17から19いずれか1項記載の光音響計測装置。
- 前記光学部材が、前記第1の光源から出射された光を導光する第1の光ファイバと前記第2の光源から出射された光を導光する第2の光ファイバとを含み、
前記第1の光ファイバの光出射端および前記第2の光ファイバの光出射端の位置を、前記第1の光ファイバから出射された光が前記導光部材に入射される第1の位置と、前記第2の光ファイバから出射された光が前記導光部材に入射される第2の位置とに切り換えるファイバ切り換え部を備えた請求項17記載の光音響計測装置。 - 請求項1に記載の挿入物の製造方法であって、
前記挿入物の前記中空部内に前記導光部材を挿入して、前記導光部材の光出射端を前記貫通孔上に配置した後、
前記導光部材の光出射端に対して前記光音響波発生部を形成する材料を供給しながら、かつ前記貫通孔を前記材料によって充填し、該充填後、前記材料を硬化させる挿入物の製造方法。 - 請求項1に記載の挿入物であって、前記挿入部における前記光音響波発生部が前記導光部材によって導光された光を透過する材料から形成された挿入物の製造方法であって、
前記導光部材の光出射端に前記光音響波発生部を形成した後、該光音響波発生部が設けられた前記導光部材を、前記挿入物の前記中空部内に挿入して、前記光音響波発生部を前記貫通孔上に配置した後、
前記光音響波発生部に対して光硬化樹脂を供給しながら、かつ前記貫通孔を前記光硬化樹脂によって充填し、前記導光部材によって導光された光を前記光硬化樹脂に照射することによって硬化させる挿入物の製造方法。 - 請求項1に記載の挿入物であって、前記挿入部における前記光音響波発生部が前記導光部材によって導光された光によって硬化する光硬化樹脂を含む材料から形成された挿入物の製造方法であって、
前記挿入物の前記中空部内に前記導光部材を挿入して、前記導光部材の光出射端を前記貫通孔上に配置した後、
前記導光部材の光出射端に対して前記光硬化樹脂を含む材料を供給しながら、かつ前記貫通孔を前記材料によって充填し、前記導光部材によって導光された光を前記光硬化樹脂に照射することによって硬化させる挿入物の製造方法。
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