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WO2017037782A1 - Dispositif d'observation de type à balayage - Google Patents

Dispositif d'observation de type à balayage Download PDF

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Publication number
WO2017037782A1
WO2017037782A1 PCT/JP2015/074432 JP2015074432W WO2017037782A1 WO 2017037782 A1 WO2017037782 A1 WO 2017037782A1 JP 2015074432 W JP2015074432 W JP 2015074432W WO 2017037782 A1 WO2017037782 A1 WO 2017037782A1
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WO
WIPO (PCT)
Prior art keywords
image
unit
scanning
rotation angle
subject
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/074432
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English (en)
Japanese (ja)
Inventor
西村　淳一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Corp filed Critical Olympus Corp
Priority to PCT/JP2015/074432 priority Critical patent/WO2017037782A1/fr
Priority to JP2017537052A priority patent/JPWO2017037782A1/ja
Publication of WO2017037782A1 publication Critical patent/WO2017037782A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor

Definitions

  • the present invention relates to a scanning observation apparatus.
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to provide a scanning observation apparatus capable of executing image rotation processing at high speed by simple calculation.
  • the present invention provides the following means.
  • the present invention includes a scanning unit that rotates and scans a beam for irradiating a subject at a constant angular velocity, a detection unit that detects a signal wave generated in the subject by irradiation of the beam, and the detection unit that detects the detection unit
  • An image generation unit that generates an image of the subject based on a signal wave; and a rotation angle setting unit that sets a rotation angle of the image of the subject in the image generated by the image generation unit.
  • a beam calculating unit that calculates a shift time based on the rotation angle set by the rotation angle setting unit and the angular velocity of the beam, and the beam at a time when the signal wave is shifted from the detection time by the detection unit by the shift time.
  • a scanning observation apparatus that generates the image by associating with an irradiation position on the scanning trajectory.
  • the beam is scanned on the subject by the scanning unit, and the signal wave from the subject is detected by the detection unit.
  • the image generation unit generates an image of the subject by associating the detected signal wave with a beam irradiation position on the subject.
  • the signal wave is associated with a position shifted in the scanning direction from the actual beam irradiation position by an angle corresponding to the rotation angle set by the rotation angle setting unit. Since the beam is rotationally scanned at a constant angular velocity, the signal wave detected by the detection unit is shifted by a shift time equal to the ratio of the rotation angle received from the rotation angle setting unit and the angular velocity of the beam received from the detection unit. By doing so, the image of the subject can be uniformly rotated by the rotation angle. In this way, image rotation processing can be executed at high speed by a simple calculation in which the signal wave to be associated and the irradiation position are shifted by an equal shift time in the time direction.
  • the image generation unit further includes a rotation adjustment unit, and based on the value of the rotation angle ⁇ received from the rotation angle setting unit and the value of the angular velocity ⁇ of the laser beam received from the detection unit,
  • the shift time may be changeable in units of one frame of image so that the image generator generates each image with a different shift time.
  • the rotation angle of the subject image in the image can be changed in units of one frame, and the rotation angle of the subject image in the image displayed as a live image on the display unit can be changed in substantially real time.
  • the scanning unit may rotationally scan the beam along a spiral or concentric scanning locus.
  • FIG. 1 is an overall configuration diagram of a scanning observation apparatus according to an embodiment of the present invention. It is a block diagram which shows the detailed structure of the scanning observation apparatus of FIG. It is a figure which shows the structure of the scanner in the scanning observation apparatus of FIG.
  • FIG. 3B is a cross-sectional view taken along line III-III in FIG. 3A. It is a figure which shows an example of the brightness
  • DELTA coordinate by shift time
  • scanning type observation device 1 concerning one embodiment of the present invention is explained with reference to drawings.
  • the scanning observation apparatus 1 emits a laser beam (beam) L irradiated to the subject A from the distal end of the insertion portion 21 of the endoscope 2 in a spiral scanning locus B.
  • the scanning observation apparatus 1 includes a light source unit 3, an optical scanning unit (scanning unit) 4 that scans the laser light L output from the light source unit 3 and irradiates the subject A, and a subject.
  • a detection unit (detection unit) 5 that detects the reflected light (signal wave) L ′ of the laser light L from A, and an image that generates an image of the subject A based on the reflected light L ′ detected by the detection unit 5
  • a generation unit (image generation unit) 6 a control unit 7 that controls the optical scanning unit 4, the detection unit 5, and the image generation unit 6, and a rotation angle setting unit 8 that sets the rotation angle ⁇ of the image of the subject A in the image.
  • a display unit 9. A part of the optical scanning unit 4 and the detection unit 5, the image generation unit 6, and the control unit 7 are accommodated in a housing 10 connected to the endoscope 2.
  • the light source unit 3 includes three laser light sources (not shown) that respectively emit red (R), green (G), and blue (B) continuous wave laser beams.
  • the light source unit 3 combines the R, G, and B laser beams to generate white laser beam L, and emits the white laser beam L.
  • a semiconductor solid-state laser light source or a laser diode is used as the laser light source.
  • a white light image of the subject A is acquired
  • other types of images may be acquired.
  • an image of fluorescence excited by laser light may be acquired, or an infrared image or NBI (narrow band imaging) image may be acquired using laser light of a specific color.
  • NBI narrow band imaging
  • the optical scanning unit 4 includes a waveform generator 41 that generates a digital waveform based on a control signal from the controller 7, a D / A converter 42 that D / A converts the digital waveform to generate an alternating voltage, a light source And a scanner 43 that irradiates the subject A while scanning the laser beam L from the unit 3.
  • the waveform generation unit 41 generates a digital waveform having a frequency and amplitude specified by the control signal received from the control unit 7.
  • the D / A converter 42 generates an alternating voltage by converting the digital waveform generated by the waveform generator 41 into a voltage waveform.
  • the generated alternating voltage is supplied to the scanner 43 via the electric cables 13A and 13B.
  • the scanner 43 is disposed inside the distal end portion 21 a of the insertion portion 21.
  • the scanner 43 includes an illumination optical fiber 44 disposed in the insertion portion 21 along the longitudinal direction, an actuator 45 that vibrates the illumination optical fiber 44, and the illumination optical fiber 44 and the actuator 45 of the insertion portion 21. And a fixing portion 46 that is fixed to the outer cylinder.
  • Reference numerals 11 and 12 denote condensing lenses that focus the laser light L emitted from the tip of the illumination optical fiber 44 onto the subject A.
  • the proximal end of the illumination optical fiber 44 is connected to the light source unit 3.
  • the laser light L incident on the proximal end surface of the illumination optical fiber 44 from the light source unit 3 is guided from the proximal end to the distal end of the illumination optical fiber 44, and from the distal end surface of the illumination optical fiber 44 to the insertion portion 21. It is injected toward the front of the tip.
  • the actuator 45 includes a rectangular cylindrical elastic portion 47 and four piezoelectric elements 48A and 48B fixed to the outer peripheral surface of the elastic portion 47.
  • the illumination optical fiber 44 passes through the elastic portion 47, and the elastic portion 47 is formed on the outer peripheral surface of the illumination optical fiber 44 at a position spaced from the distal end of the illumination optical fiber 44 to the proximal end side. It is fixed.
  • a portion of the elastic portion 47 closer to the base end side than the piezoelectric elements 48 ⁇ / b> A and 48 ⁇ / b> B is fixed to the outer cylinder of the insertion portion 21 via the fixing portion 46.
  • the elastic portion 47 and the distal end portion of the illumination optical fiber 44 are supported in a cantilever shape and can swing.
  • the piezoelectric elements 48A and 48B are plate-like and polarized in the thickness direction.
  • an arrow P indicates the polarization direction of the piezoelectric elements 48A and 48B.
  • the piezoelectric elements 48A and 48B have four elastic portions 47 so that the polarization directions of the two piezoelectric elements 48A or 48B facing the radial direction of the illumination optical fiber 44 are the same.
  • One sheet is fixed to each of the two outer surfaces.
  • An A-phase electrical cable 13A is connected to the two X scanning piezoelectric elements 48A facing in the X direction
  • a B phase electrical cable is connected to the two Y scanning piezoelectric elements 48B facing in the Y direction.
  • the cable 13B is connected.
  • the X direction and the Y direction are radial directions of the illumination optical fiber 44 and are directions orthogonal to each other.
  • the waveform generator 41 generates two digital waveforms of A phase and B phase.
  • the D / A converter 42 is provided for the A phase and the B phase, respectively.
  • the B-phase D / A converter 42 D / A converts the B-phase digital waveform, and the generated B-phase alternating voltage is supplied to two Y-scanning piezoelectric elements 48B via the electric cable 13B. To be supplied.
  • the piezoelectric element 48A for X scanning expands and contracts in the longitudinal direction (Z direction) of the illumination optical fiber 44 by application of an A-phase alternating voltage.
  • the elastic portion 47 is excited to bend in the X direction with the position of the fixed portion 46 as a node. Is done.
  • the bending vibration of the elastic portion 47 is transmitted to the illumination optical fiber 44.
  • the tip of the illumination optical fiber 44 bends and vibrates in the X direction
  • the tip of the optical fiber 11 vibrates in the X direction
  • the laser light L emitted from the tip is scanned in the X direction.
  • the Y-scanning piezoelectric element 48B expands and contracts in the longitudinal direction (Z direction) of the illumination optical fiber 44 when a B-phase alternating voltage is applied. At this time, one of the two piezoelectric elements 48B contracts in the Z direction and the other expands in the Z direction, so that the elastic portion 47 is excited by bending vibration in the Y direction with the position of the fixed portion 46 as a node. Is done. The bending vibration of the elastic portion 47 is transmitted to the illumination optical fiber 44.
  • the distal end portion of the illumination optical fiber 44 bends and vibrates in the Y direction, the distal end of the illumination optical fiber 44 vibrates in the Y direction, and the laser light L emitted from the distal end is scanned in the Y direction.
  • the detection unit 5 includes a light receiving unit 51 that receives the reflected light L ′ of the laser light L reflected from the subject A, and a photodetector 52 that detects the reflected light L ′ received by the light receiving unit 51.
  • the light receiving unit 51 is a light receiving optical fiber (hereinafter also referred to as “light receiving optical fiber 51”) arranged in parallel with the illumination optical fiber 44 and inside the insertion unit 21.
  • a plurality of light receiving optical fibers 51 are provided so as to surround the illumination optical fiber 44 in the circumferential direction.
  • a light receiving lens (not shown) is disposed on the front end side of each light receiving optical fiber 51, and the reflected light L ′ from the subject A enters the front end surface of the light receiving optical fiber 51 through the light receiving lens.
  • the base end of the light receiving optical fiber 51 is connected to the photodetector 52.
  • the reflected light L ′ incident on the front end surface of the light receiving optical fiber 51 is guided from the front end to the base end of the light receiving optical fiber 51 and enters the photodetector 52.
  • the photodetector 52 detects the reflected light L ′ at regular time intervals, and outputs an electrical signal corresponding to the detected intensity of the reflected light L ′ to the A / D converter 61 in the image generation unit 6.
  • the photodetector 52 is, for example, a color separation element (not shown) that separates the white reflected light L ′ from the light receiving optical fiber 51 into three colors of R, G, and B, and color separation by the color separation element. And three photodiodes (not shown) that photoelectrically convert each reflected light L ′ of R, G, and B. With this configuration, the photodetector 52 detects the reflected light L ′ of R, G, and B separately and simultaneously, and outputs three electrical signals to the A / D converter 61.
  • the image generation unit 6 includes an A / D converter 61 that performs A / D conversion on the electrical signal output from the photodetector 52, a rotation adjustment unit 62 that adjusts the rotation angle of the image of the subject A in the image, and an image. And an image forming unit 63 for forming the image.
  • the A / D converter 61 obtains a digital value indicating the intensity of the reflected light L ′ by digitally converting each of the three electrical signals from the photodetector 52.
  • the obtained digital values are the R, G, and B luminance values of each pixel of the image formed by the image forming unit 63.
  • the R, G, and B luminance values detected at the time ti by the photodetector 52 are referred to as luminance values S (ti).
  • the A / D converter 61 transmits the obtained luminance value S (ti) to the rotation adjustment unit 62.
  • the detection time ti is acquired from the control unit 7, for example.
  • the rotation adjustment unit 62 receives from the control unit 7 a coordinate data set D2 (detailed later) in which the coordinates P (ti) of each pixel for one frame of the image are associated with the detection time ti.
  • the rotation adjustment unit 62 performs the following rotation processing based on the rotation angle ⁇ set by the rotation angle setting unit 8 to generate a coordinate data set D2 ′.
  • the rotation adjusting unit 62 is based on the following equation from the value of the rotation angle ⁇ received from the rotation angle setting unit 8 and the value of the angular velocity ⁇ (described later) of the laser light L received from the control unit 7.
  • the rotation adjustment unit 62 relatively shifts the coordinates P (ti) and the detection time ti in the time direction by the calculated shift time ⁇ t in the coordinate data set D2.
  • the correspondence between the coordinates P (ti) and the detection time ti is uniformly changed, and each coordinate P (ti) is shifted by the shift time ⁇ t before the actual detection time ti. Or later time ti + ⁇ t.
  • the image of the subject A in the image formed by the image forming unit 63 is rotated by the rotation angle ⁇ as described later.
  • the rotation angle ⁇ is 0 °
  • the shift time ⁇ t is zero
  • the coordinate data set D2 ' is the same as the coordinate data set D2.
  • the rotation adjustment unit 62 associates the brightness value S (ti) and the coordinate P (ti + ⁇ t) associated with the same detection time ti in the brightness value data set D1 and the coordinate data set D2 ′, thereby generating an image. Generate a data set.
  • the rotation adjusting unit 62 transmits the generated image data set to the image forming unit 63.
  • the rotation adjusting unit 62 sets the shift time ⁇ t based on the rotation angle ⁇ for each frame of the image so as to generate images at different shift times. Accordingly, the shift time ⁇ t can be changed in units of one image frame, and the rotation angle ⁇ of the image of the subject A can be changed in units of one image frame.
  • the image forming unit 63 forms an image by assigning each pixel a luminance value S (ti) corresponding to the pixel coordinate P (ti + ⁇ ) based on the image data set.
  • the image forming unit 63 transmits the formed image to the display unit 9 and causes the display unit 9 to display the image.
  • the control unit 7 controls the photodetector 52 so that the photodetector 52 detects the reflected light L ′ at regular time intervals.
  • the control unit 7 sets the frequency and amplitude of the alternating voltage, generates a control signal for generating a digital waveform having the set frequency and amplitude, and transmits the control signal to the waveform generation unit 41.
  • control unit 7 generates two control signals that cause the waveform generation unit 41 to generate A-phase and B-phase digital waveforms whose amplitude changes in a sine wave shape and whose phases are shifted from each other by ⁇ / 2.
  • the A / B converter 42 generates alternating voltages of the A phase and the B phase, the amplitude of which gradually changes in a sine wave shape and whose phases are shifted from each other by ⁇ / 2.
  • the tip of the illumination optical fiber 44 spirally vibrates, and the laser light L is scanned along the spiral scanning locus B on the subject A. It is like that.
  • control unit 7 generates the control signal so that the waveform generation unit 41 generates a digital waveform having a constant frequency.
  • the laser beam L is scanned along the scanning locus B at a constant angular velocity ⁇ .
  • the control unit 7 calculates the angular velocity ⁇ of the laser light L from the frequency of the digital waveform, and transmits the calculated value of the angular velocity ⁇ to the rotation adjustment unit 62.
  • the control unit 7 calculates the irradiation position on the scanning locus B of the laser beam L at the detection time ti of the reflected light L ′ by the photodetector 52 based on the control signals for the A phase and the B phase.
  • the control unit 7 sets the irradiation position at each detection time ti as the coordinate P (ti) of each pixel in the image, and associates the coordinate P (ti) of each pixel with the detection time ti as shown in FIG. 4A.
  • the coordinate data set D2 is generated, and the generated coordinate data set D2 is transmitted to the image forming unit 63.
  • the waveform generating unit 41, the rotation adjusting unit 62, the image forming unit 63, and the control unit 7 described above are realized by a computer.
  • the computer includes a middle processing unit (CPU), a main storage device such as a RAM, and an auxiliary storage device.
  • the auxiliary storage device is a computer-readable non-transitory storage medium such as a hard disk or various memories, and a control program for controlling the optical scanning unit 4 and the detection unit 5 and an image for forming an image.
  • each part 41, 62, 63, 7 may be comprised from dedicated hardware like ASIC (application specific integrated circuit).
  • ASIC application specific integrated circuit
  • the rotation angle setting unit 8 includes a GUI (graphical user interface) provided in the display unit 9 and displays a graphic for allowing the user to set the rotation angle ⁇ on the screen of the display unit 9.
  • the graphic includes a scale bar 81 from ⁇ 180 ° to + 180 ° and a slider 82 movable within the scale bar 81.
  • the user can set the rotation angle ⁇ within a range from ⁇ 180 ° to + 180 ° by moving the slider 82 within the scale bar 81 using an input device such as a mouse connected to the display unit 9. It can be done.
  • the rotation angle ⁇ is initially set to 0 °.
  • the rotation angle setting unit 8 transmits the set value of the rotation angle ⁇ to the rotation adjustment unit 62.
  • the waveform generator 41 starts generating a digital waveform in response to a control signal from the controller 7, an alternating voltage is applied to the piezoelectric elements 48A and 48B of the scanner 43, so that the tip of the illumination optical fiber 44 spirally vibrates. To do.
  • the white laser light L is scanned along the spiral scanning locus B on the surface of the subject A facing the distal end surface of the insertion portion 21.
  • the reflected light L ′ of the laser light L reflected from the surface of the subject A is received by the light receiving optical fiber 51, detected by the photodetector 52, and an electrical signal of the reflected light L ′ is transmitted into the image generation unit 6. Is done.
  • the electric signal is digitally converted by the A / D converter 61, whereby the luminance value S (ti) of each pixel of the image is obtained.
  • the rotation adjustment unit 62 a luminance value data set D1 that is time-series data of the luminance value S (ti) at each detection time ti is generated.
  • a coordinate data set D2 which is time series data of the coordinates P (ti) at each detection time ti is generated.
  • the set D2 is transmitted to the rotation adjustment unit 62.
  • the rotation adjusting unit 62 generates a coordinate data set D2 ′ from the coordinate data set D2, and adds the brightness value S () at the same time ti in the brightness value data set D1 to each coordinate P (ti + ⁇ t) in the coordinate data set D2 ′.
  • By associating ti) an image data set for one image frame is generated.
  • each luminance value S (ti) is associated with the coordinate P (ti) at the actual detection time ti as indicated by a white circle in FIG.
  • the orientation of the image of the subject A in the image is the same as the actual orientation of the subject A with respect to the distal end surface of the insertion unit 21.
  • the rotation angle setting unit 8 sets the rotation angle ⁇ to a desired angle other than 0 °.
  • the rotation adjustment unit 62 causes the coordinates P (ti) and the detection time ti in the coordinate data set D2 to be in the time direction by the shift time ⁇ t based on the rotation angle ⁇ . Shift to.
  • each luminance value S (ti) is associated with the coordinate P (ti + ⁇ t) rotated by the rotation angle ⁇ from the actual coordinate P (ti) as shown by a black circle in FIG. .
  • an image in which the subject A is rotated by the rotation angle ⁇ is formed.
  • the detection time ti associated with each coordinate P (ti) is obtained from the rotational angle setting unit 8.
  • the coordinate P (ti) in the coordinate data set D2 and the detection time ti are shifted in the time direction.
  • the luminance value S in the luminance value data set D1 is used.
  • (Ti) and detection time ti may be shifted in the time direction. Even if it does in this way, the same effect can be acquired.
  • the optical scanning unit 4 scans the laser light L along the spiral scanning locus B.
  • the optical scanning unit 4 may scan along the concentric scanning locus.
  • the configuration of the scanner 43 can be appropriately changed according to the shape of the scanning locus.
  • an optical scanner using a photonic crystal may be used instead of the scanner 43 using the piezoelectric actuator 45.
  • the rotation angle setting unit 8 detects the direction of the subject A in the image and sets the detected direction to a predetermined value. It may be configured to automatically set the rotation angle ⁇ so as to match the direction of.
  • the scanning unit including the optical scanning unit 4 that scans the laser light L to acquire an optical image is provided.
  • the ultrasonic beam is scanned on the subject A.
  • a scanning unit including an ultrasonic scanning unit that acquires an ultrasonic image by detecting an echo (signal wave) from the subject A may be provided.
  • the endoscope apparatus has been described.
  • the image rotation processing described above is an arbitrary observation in which an image of the subject A is acquired by rotating and scanning a light or ultrasonic beam on the subject A. It can be applied to the device.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

L'invention concerne un dispositif d'observation de type à balayage (1) muni : d'une unité de balayage (4) qui effectue des balayages en rotation, à une vitesse angulaire constante, d'un faisceau (L) pour exposer un sujet (A) ; d'une unité de détection (5) qui détecte une onde de signal (L') à partir du sujet (A) ; d'une unité de génération d'image (6) qui génère une image du sujet (A) sur la base de l'onde de signal (L') ; et d'une unité de réglage d'angle de rotation (8) qui règle un angle de rotation de l'image du sujet (A) à l'intérieur de l'image. L'unité de génération d'image (6) calcule un temps de décalage sur la base de l'angle de rotation réglé et de la vitesse angulaire du faisceau (L) et génère une image par l'association de l'onde de signal (L') avec la position d'exposition du faisceau (L) à un instant décalé par le temps de décalage à partir de l'instant de la détection par l'unité de détection (5).
PCT/JP2015/074432 2015-08-28 2015-08-28 Dispositif d'observation de type à balayage Ceased WO2017037782A1 (fr)

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PCT/JP2015/074432 WO2017037782A1 (fr) 2015-08-28 2015-08-28 Dispositif d'observation de type à balayage
JP2017537052A JPWO2017037782A1 (ja) 2015-08-28 2015-08-28 走査型観察装置

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Application Number Priority Date Filing Date Title
PCT/JP2015/074432 WO2017037782A1 (fr) 2015-08-28 2015-08-28 Dispositif d'observation de type à balayage

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10262921A (ja) * 1997-03-24 1998-10-06 Olympus Optical Co Ltd 電子内視鏡装置
JP2010142482A (ja) * 2008-12-19 2010-07-01 Hoya Corp 光走査型内視鏡プロセッサおよび光走査型内視鏡装置
WO2015004960A1 (fr) * 2013-07-12 2015-01-15 オリンパスメディカルシステムズ株式会社 Système d'endoscope

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8757812B2 (en) * 2008-05-19 2014-06-24 University of Washington UW TechTransfer—Invention Licensing Scanning laser projection display devices and methods for projecting one or more images onto a surface with a light-scanning optical fiber
US9364167B2 (en) * 2013-03-15 2016-06-14 Lx Medical Corporation Tissue imaging and image guidance in luminal anatomic structures and body cavities

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10262921A (ja) * 1997-03-24 1998-10-06 Olympus Optical Co Ltd 電子内視鏡装置
JP2010142482A (ja) * 2008-12-19 2010-07-01 Hoya Corp 光走査型内視鏡プロセッサおよび光走査型内視鏡装置
WO2015004960A1 (fr) * 2013-07-12 2015-01-15 オリンパスメディカルシステムズ株式会社 Système d'endoscope

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