WO2014045631A1 - 走査型内視鏡システム - Google Patents
走査型内視鏡システム Download PDFInfo
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- WO2014045631A1 WO2014045631A1 PCT/JP2013/063023 JP2013063023W WO2014045631A1 WO 2014045631 A1 WO2014045631 A1 WO 2014045631A1 JP 2013063023 W JP2013063023 W JP 2013063023W WO 2014045631 A1 WO2014045631 A1 WO 2014045631A1
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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
- A61B1/00163—Optical arrangements
- A61B1/00172—Optical arrangements with means for scanning
-
- 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
- A61B1/04—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 combined with photographic or television appliances
- A61B1/045—Control thereof
-
- 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
- A61B1/06—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 with illuminating arrangements
- A61B1/0661—Endoscope light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2461—Illumination
- G02B23/2469—Illumination using optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/103—Scanning systems having movable or deformable optical fibres, light guides or waveguides as scanning elements
-
- 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
- A61B1/04—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 combined with photographic or television appliances
-
- 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
- A61B1/06—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 with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0669—Endoscope light sources at proximal end of an endoscope
Definitions
- the present invention relates to a scanning endoscope system, and more particularly to a scanning endoscope system that scans a subject to acquire an image.
- a scanning endoscope that does not include a solid-state imaging device in a portion corresponding to the above-described insertion portion, and a system that includes the scanning endoscope are known. ing.
- the subject is set in advance by swinging the distal end portion of the illumination fiber that guides the illumination light emitted from the light source unit.
- an endoscope apparatus as disclosed in Japanese Patent Application Laid-Open No. 2010-131112 is conventionally known.
- control for stabilizing the frame rate at the time of observation for example, timing related to irradiation of illumination light to the subject and return from the subject It is desirable to perform control so as to synchronize timing related to image generation according to light.
- Japanese Patent Application Laid-Open No. 2010-131112 does not particularly mention a viewpoint related to the control as described above.
- timing related to irradiation of illumination light to a subject and timing related to generation of an image according to return light from the subject are not synchronized with each other, and there is a problem that the stability of the frame rate at the time of observation using the scanning endoscope is impaired.
- the present invention has been made in view of the circumstances described above, and provides a scanning endoscope system capable of improving the stability of the frame rate during observation using a scanning endoscope as compared with the conventional one. It is intended to provide.
- a scanning endoscope system includes a light guide unit that guides illumination light emitted from a light source, and an irradiation position of the illumination light that is irradiated to a subject through the light guide unit.
- a scanning type endoscope comprising: a drive unit capable of swinging the light guide unit so as to draw a locus corresponding to the light source; and a light receiving unit configured to receive a return light of the illumination light applied to the subject.
- a mirror configured to generate and output a signal according to the intensity of the return light received by the light receiving unit, and an irradiation position of the illumination light at an outermost point of a spiral trajectory
- the first scan from the center point to the center point and the second scan in which the irradiation position of the illumination light is directed from the center point to the outermost point of the spiral trajectory are sequentially performed. And immediately after the second scan is performed, or before the first scan and before Control for driving the drive unit to perform a third scan in which the irradiation position of the illumination light circulates on the same circumference during any of the second scans Part.
- FIG. 1 is a diagram illustrating a configuration of a main part of a scanning endoscope system according to an embodiment.
- the scanning endoscope system 1 includes a scanning endoscope 2 that is inserted into a body cavity of a subject, a main body device 3 that is connected to the scanning endoscope 2, and And a monitor 4 connected to the main unit 3.
- the scanning endoscope 2 has an insertion portion 11 formed with an elongated shape and flexibility that can be inserted into a body cavity of a subject. Note that a connector (not shown) or the like for detachably connecting the scanning endoscope 2 to the main body device 3 is provided at the proximal end portion of the insertion portion 11.
- An illumination fiber having a function as a light guide for guiding illumination light supplied from the light source unit 21 of the main body device 3 to the objective optical system 14 is provided in a portion from the base end portion to the distal end portion in the insertion portion 11. 12 and a light receiving fiber 13 that receives the return light from the subject and guides it to the detection unit 23 of the main body device 3 are respectively inserted.
- the end including the light incident surface of the illumination fiber 12 is disposed in a multiplexer 32 provided inside the main unit 3. Further, the end portion including the light emission surface of the illumination fiber 12 is disposed in a state in which it is not fixed by a fixing member or the like in the vicinity of the light incident surface of the lens 14 a provided at the distal end portion of the insertion portion 11.
- the end including the light incident surface of the light receiving fiber 13 is fixedly disposed around the light emitting surface of the lens 14 b at the distal end surface of the distal end portion of the insertion portion 11. Further, the end including the light emitting surface of the light receiving fiber 13 is disposed in a duplexer 36 provided inside the main body device 3.
- the objective optical system 14 includes a lens 14a into which illumination light from the illumination fiber 12 is incident, and a lens 14b that emits illumination light that has passed through the lens 14a to a subject.
- An actuator 15 that is driven based on a drive signal output from the driver unit 22 of the main body device 3 is attached to the middle portion of the illumination fiber 12 on the distal end side of the insertion portion 11.
- FIG. 2 is a diagram for explaining an example of a virtual XY plane set on the surface of the subject.
- the point SA on the XY plane in FIG. 2 is the insertion axis when the insertion axis of the insertion unit 11 is virtually set to exist in the direction corresponding to the back side from the front side of the page. It shows the intersection with the page.
- the X-axis direction on the XY plane in FIG. 2 is set as a direction from the left side to the right side of the drawing.
- the Y-axis direction in the XY plane of FIG. 2 is set as a direction from the lower side to the upper side of the drawing.
- the X axis and the Y axis constituting the XY plane of FIG. 2 intersect at the point SA.
- the actuator 15 is based on the first drive signal output from the driver unit 22 of the main unit 3 and operates for swinging the end including the light emitting surface of the illumination fiber 12 in the X-axis direction. Based on an actuator (not shown) and a second drive signal output from the driver unit 22 of the main unit 3, the end including the light emitting surface of the illumination fiber 12 is swung in the Y-axis direction. And a Y-axis actuator (not shown).
- the actuator 15 is configured so that the irradiation position of the illumination light applied to the subject draws a locus corresponding to a predetermined scanning pattern by the operations of the X-axis actuator and the Y-axis actuator as described above.
- the end including the 12 light exit surfaces can be swung.
- a memory 16 Inside the insertion unit 11 is provided a memory 16 in which endoscope information including various pieces of information such as individual identification information of the scanning endoscope 2 is stored in advance.
- the endoscope information stored in the memory 16 is read by the controller 25 of the main body device 3 when the scanning endoscope 2 and the main body device 3 are connected.
- the main unit 3 includes a light source unit 21, a driver unit 22, a detection unit 23, a memory 24, and a controller 25.
- the light source unit 21 includes a light source 31a, a light source 31b, a light source 31c, and a multiplexer 32.
- the light source 31 a includes, for example, a laser light source and the like, and is configured to emit red wavelength band light (hereinafter also referred to as R light) to the multiplexer 32 when turned on under the control of the controller 25. Yes.
- R light red wavelength band light
- the light source 31b includes a laser light source, for example, and is configured to emit light in a green wavelength band (hereinafter also referred to as G light) to the multiplexer 32 when turned on under the control of the controller 25. Yes.
- G light a green wavelength band
- the light source 31c includes, for example, a laser light source, and is configured to emit light in a blue wavelength band (hereinafter also referred to as B light) to the multiplexer 32 when turned on under the control of the controller 25. Yes.
- B light a blue wavelength band
- the multiplexer 32 multiplexes the R light emitted from the light source 31a, the G light emitted from the light source 31b, and the B light emitted from the light source 31c onto the light incident surface of the illumination fiber 12. It is configured so that it can be supplied.
- the driver unit 22 includes a signal generator 33, digital / analog (hereinafter referred to as D / A) converters 34a and 34b, and an amplifier 35.
- D / A digital / analog
- the signal generator 33 is a predetermined drive signal as shown in FIG. 3, for example, as a first drive signal for swinging the end including the light emitting surface of the illumination fiber 12 in the X-axis direction.
- a waveform signal is generated and output to the D / A converter 34a.
- FIG. 3 is a diagram for explaining an example of a signal waveform of a drive signal supplied to an actuator provided in the scanning endoscope.
- the signal generator 33 generates the first drive signal as a second drive signal that swings the end including the light emitting surface of the illumination fiber 12 in the Y-axis direction based on the control of the controller 25.
- a signal having a waveform whose phase is shifted by 90 ° is generated and output to the D / A converter 34b.
- the D / A converter 34 a is configured to convert the digital first drive signal output from the signal generator 33 into an analog first drive signal and output the analog first drive signal to the amplifier 35.
- the D / A converter 34 b is configured to convert the digital second drive signal output from the signal generator 33 into an analog second drive signal and output the analog second drive signal to the amplifier 35.
- the amplifier 35 is configured to amplify the first and second drive signals output from the D / A converters 34 a and 34 b and output the amplified signals to the actuator 15.
- the amplitude value (signal level) of the waveform of the drive signal illustrated in FIG. 3 gradually decreases starting from time T1 at which the maximum value is reached, and gradually increases immediately after reaching 0 at time T2. It becomes the maximum value at T3, and gradually decreases immediately after maintaining the maximum value in the period from time T3 to time T4, and becomes 0 at time T5.
- FIG. 4 is a diagram for explaining a first spiral trajectory drawn when scanning a virtual XY plane as shown in FIG.
- FIG. 5 is a diagram for explaining a second spiral trajectory drawn when scanning a virtual XY plane as shown in FIG.
- FIG. 6 is a diagram for explaining an example of a circular locus drawn when the virtual XY plane as shown in FIG. 2 is scanned.
- the illumination light is irradiated to the point YMAX which is the outermost point of the illumination light irradiation coordinates on the surface of the subject.
- the irradiation coordinate of the illumination light on the surface of the subject has a first spiral trajectory inward starting from the point YMAX.
- illumination light is irradiated to a position corresponding to the point SA on the surface of the subject (see FIG. 4).
- the illumination light irradiation coordinates on the surface of the subject have a second spiral locus outward from the point SA.
- the illumination light is irradiated to the point YMAX that is the outermost point of the illumination light irradiation coordinates on the surface of the subject (see FIG. 5).
- the illumination light irradiation coordinates on the surface of the subject are predetermined along a circular trajectory having a radius RMAX corresponding to the distance between the point SA and the point YMAX. It is displaced so as to rotate around the number of times (see FIG. 6).
- the irradiation coordinate of the illumination light on the surface of the subject has a first spiral trajectory inward starting from the point YMAX.
- illumination light is irradiated to the point SA on the surface of the subject (see FIG. 4).
- the detection unit 23 includes a duplexer 36, detectors 37a, 37b, and 37c, and analog-digital (hereinafter referred to as A / D) converters 38a, 38b, and 38c.
- a / D analog-digital
- the demultiplexer 36 includes a dichroic mirror and the like, and separates the return light emitted from the light emitting surface of the light receiving fiber 13 into light for each of R (red), G (green), and B (blue) color components. And it is comprised so that it may radiate
- the detector 37a detects the intensity of the R light output from the duplexer 36, generates an analog R signal corresponding to the detected intensity of the R light, and outputs the analog R signal to the A / D converter 38a. It is configured.
- the detector 37b detects the intensity of the G light output from the duplexer 36, generates an analog G signal corresponding to the detected intensity of the G light, and outputs the analog G signal to the A / D converter 38b. It is configured.
- the detector 37c detects the intensity of the B light output from the duplexer 36, generates an analog B signal according to the detected intensity of the B light, and outputs the analog B signal to the A / D converter 38c. It is configured.
- the A / D converter 38a is configured to convert the analog R signal output from the detector 37a into a digital R signal and output it to the controller 25.
- the A / D converter 38b is configured to convert the analog G signal output from the detector 37b into a digital G signal and output it to the controller 25.
- the A / D converter 38c is configured to convert the analog B signal output from the detector 37c into a digital B signal and output it to the controller 25.
- the memory 24 stores in advance a control program for controlling the main device 3.
- the memory 24 stores endoscope information read by the controller 25 of the main body device 3.
- the controller 25 includes a CPU and the like, and is configured to read a control program stored in the memory 24 and control the light source unit 21 and the driver unit 22 based on the read control program.
- the controller 25 outputs from the detection unit 23 while maintaining control for supplying illumination light from the light source unit 21 to the illumination fiber 12 and control for supplying a drive signal from the driver unit 22 to the actuator 15. An image based on each color signal to be generated can be generated and displayed on the monitor 4.
- the controller 25 maintains the control for supplying the illumination light from the light source unit 21 to the illumination fiber 12 and the control for supplying the drive signal from the driver unit 22 to the actuator 15, respectively.
- An image for one frame based on each color signal output from the detection unit 23 during a period corresponding to the time T1 to time T2, and 1 based on each color signal output from the detection unit 23 during a period corresponding to the time T2 to time T3.
- the image for the frame and the image are generated and displayed on the monitor 4 during the period from time T3 to time T4. That is, each color signal output from the detection unit 23 during a period corresponding to the time T3 to the time T4 does not contribute to the generation of an image.
- an operation similar to the operation from the time T3 to the time T4 described above is performed for each fixed period in which scanning for obtaining an image for two frames is completed. Therefore, according to the embodiment described above, control is performed such that at least one of the swinging of the illumination fiber 12 and the supply of illumination light to the illumination fiber 12 is temporarily stopped. Instead, it is possible to suitably synchronize the timing related to the irradiation of the illumination light to the subject and the timing related to the generation of the image according to the return light from the subject. As a result, according to the embodiment described above, the stability of the frame rate at the time of observation using the scanning endoscope can be improved as compared with the conventional case.
- FIG. 7 is a diagram for explaining a first modification of the signal waveform of the drive signal supplied to the actuator provided in the scanning endoscope.
- the amplitude value (signal level) of the waveform of the drive signal illustrated in FIG. 7 gradually decreases starting from time T11 at which the maximum value is reached, and gradually increases immediately after reaching 0 at time T12. It becomes a maximum value at T13, attenuated to a predetermined value less than the maximum value during a period from immediately after time T13 to immediately before time T14, amplified to the maximum value again at time T14, and gradually decreased immediately after time T14. Then, it becomes 0 at time T15.
- the predetermined value described above may be appropriately set according to, for example, the length of the end of the illumination fiber 12 that is swung by the actuator 15.
- FIG. 8 is a diagram for explaining an example of a circular locus drawn when scanning a virtual XY plane as shown in FIG. 2, which is different from FIG. 6.
- the illumination light is irradiated to the point YMAX that is the outermost point of the illumination light irradiation coordinates on the surface of the subject.
- the irradiation coordinate of the illumination light on the surface of the subject has a first spiral locus inward starting from the point YMAX.
- illumination light is irradiated to a position corresponding to the point SA on the surface of the subject (see FIG. 4).
- the irradiation light irradiation coordinates on the surface of the subject have a second spiral locus outward from the point SA.
- illumination light is irradiated to the point YMAX, which is the outermost point of the illumination light irradiation coordinates on the surface of the subject (see FIG. 5).
- the illumination light irradiation coordinates on the surface of the subject have a radius R1 ( ⁇ RMAX) corresponding to the distance between the point SA and the point Y1. Is displaced so as to circulate a predetermined number of times along the circular trajectory (see FIG. 8).
- the irradiation coordinate of the illumination light on the surface of the subject has a first spiral trajectory inward starting from the point YMAX.
- illumination light is irradiated to the point SA on the surface of the subject (see FIG. 4).
- the controller 25 maintains the control for supplying the illumination light from the light source unit 21 to the illumination fiber 12 and the control for supplying the drive signal from the driver unit 22 to the actuator 15, respectively.
- the image is generated during the period from time T13 to time T14 and displayed on the monitor 4. That is, each color signal output from the detection unit 23 during a period corresponding to the time T13 to the time T14 does not contribute to the generation of an image.
- the same operation as the operation from the time T13 to the time T14 described above is performed every predetermined period in which the scanning for obtaining the image for two frames is completed. Therefore, according to the first modification described above, control such as temporarily stopping at least one of the swinging of the illumination fiber 12 and the supply of illumination light to the illumination fiber 12, etc. Without performing the above, it is possible to suitably synchronize the timing related to the irradiation of the illumination light to the subject and the timing related to the generation of the image according to the return light from the subject. As a result, according to the first modification described above, it is possible to improve the stability of the frame rate at the time of observation using the scanning endoscope as compared with the conventional case.
- FIG. 9 is a diagram for explaining a second modification of the signal waveform of the drive signal supplied to the actuator provided in the scanning endoscope.
- the amplitude value (signal level) of the waveform of the drive signal illustrated in FIG. 9 gradually decreases from time T21 at which it reaches the maximum value to time T22, and reaches a predetermined value during the period from time T22 to time T23.
- a first drive signal having a waveform as shown in FIG. 9 is supplied to the X-axis actuator of the actuator 15, and a second drive signal obtained by shifting the phase of the first drive signal by 90 ° is provided.
- the end including the light emitting surface of the illumination fiber 12 is swung around the point SA.
- the irradiation position of the illumination light irradiated along the spiral locus in FIG. 4 temporarily shifts to the circular locus illustrated in FIG.
- the irradiation position of the illumination light irradiated along the spiral locus in FIG. 5 temporarily shifts to the circular locus illustrated in FIG. FIG.
- FIG. 10 is a diagram for explaining an example different from FIGS. 6 and 8 of the circular locus drawn when scanning the virtual XY plane as shown in FIG.
- FIG. 11 is a diagram for explaining an example of a circular locus drawn when scanning a virtual XY plane as shown in FIG. 2, which is different from FIGS. 6, 8, and 10.
- the illumination light is irradiated to the point YMAX that is the outermost point of the illumination light irradiation coordinates on the surface of the subject.
- the irradiation coordinate of the illumination light on the surface of the subject has a first spiral trajectory inward starting from the point YMAX.
- illumination light is irradiated to a position corresponding to the point Y2 on the surface of the subject (see FIG. 4).
- the illumination light irradiation coordinates on the surface of the subject follow a circular trajectory having a radius R2 ( ⁇ RMAX) corresponding to the distance between the point SA and the point Y2. It is displaced so as to rotate a predetermined number of times (see FIG. 10).
- the irradiation coordinate of the illumination light on the surface of the subject follows the first spiral locus inward from the point Y2.
- illumination light is irradiated to a position corresponding to the point SA on the surface of the subject (see FIG. 4).
- the irradiation light irradiation coordinates on the surface of the subject have a second spiral locus outward from the point SA.
- illumination light is irradiated to a position corresponding to the point Y3 on the surface of the subject (see FIG. 5).
- the illumination light irradiation coordinates on the surface of the subject are along a circular trajectory having a radius R3 ( ⁇ RMAX) corresponding to the distance between the point SA and the point Y3. It is displaced so as to rotate a predetermined number of times (see FIG. 11).
- the illumination light irradiation coordinates on the surface of the subject have a second spiral locus outward from the point Y3.
- illumination light is irradiated to a position corresponding to the point YMAX on the surface of the subject (see FIG. 5).
- the irradiation coordinates of the illumination light on the surface of the subject follow the first spiral locus inward starting from the point YMAX.
- illumination light is irradiated to a position corresponding to the point Y2 on the surface of the subject (see FIG. 4).
- the illumination light irradiation coordinates on the surface of the subject follow a circular locus of radius R2 ( ⁇ RMAX) corresponding to the distance between the point SA and the point Y2. It is displaced so as to rotate a predetermined number of times (see FIG. 10).
- the irradiation coordinate of the illumination light on the surface of the subject has a first spiral trajectory inward starting from the point Y2.
- illumination light is irradiated to a position corresponding to the point SA on the surface of the subject (see FIG. 4).
- the controller 25 maintains the control for supplying the illumination light from the light source unit 21 to the illumination fiber 12 and the control for supplying the drive signal from the driver unit 22 to the actuator 15, respectively.
- An image of the first half based on each color signal output from the detection unit 23 during a period corresponding to time T22 is generated during a period from time T22 to time T23, and from the detection unit 23 during a period corresponding to time T24 to time T24.
- a second half image based on each output color signal is generated during a period from time T25 to time T26, and an image for one frame obtained by combining the first half image and the second half image is generated from time T25. It is generated and displayed on the monitor 4 during the period up to time T26. That is, each color signal output from the detection unit 23 during the period corresponding to the time T23 from the time T23 and during the period from the time T25 to the time T26 does not contribute to image generation.
- the controller 25 maintains the control for supplying the illumination light from the light source unit 21 to the illumination fiber 12 and the control for supplying the drive signal from the driver unit 22 to the actuator 15, respectively, from time T24.
- An image of the first half based on each color signal output from the detection unit 23 during a period corresponding to time T25 is generated during a period from time T25 to time T26, and from the detection unit 23 during a period corresponding to time T26 to time T27.
- a second half image based on the output color signals is generated during a period from time T28 to time T29, and an image for one frame obtained by synthesizing the first half image and the second half image is generated from time T28. It is generated and displayed on the monitor 4 during the period up to time T29. That is, each color signal output from the detection unit 23 during a period corresponding to the time T28 to the time T29 does not contribute to the generation of an image.
- An operation similar to either the operation at or from time T28 to time T29 is performed. Therefore, according to the second modification described above, control such as temporarily stopping at least one of the swinging of the illumination fiber 12 and the supply of illumination light to the illumination fiber 12, etc. Without performing the above, it is possible to suitably synchronize the timing related to the irradiation of the illumination light to the subject and the timing related to the generation of the image according to the return light from the subject.
- the stability of the frame rate during observation using the scanning endoscope can be improved as compared with the conventional case.
- FIG. 12 is a diagram for explaining a third modification of the signal waveform of the drive signal supplied to the actuator provided in the scanning endoscope.
- a first drive signal having a waveform as shown in FIG. 12 is supplied to the X-axis actuator of the actuator 15, and the second drive signal is obtained by shifting the phase of the second drive signal by 90 °.
- the maximum amplitude value in the period from time T43 to time T44 is set to be smaller than the maximum amplitude value in the period from time T41 to time T42. ing. Therefore, according to the waveform of the drive signal shown in FIG. 12, for example, the coordinate position of the outermost point of the illumination light irradiation coordinates in the period from time T41 to time T42 is point YMAX1, and from time T43 to time T44. When the coordinate position of the outermost point of the illumination light irradiation coordinates in the period is the point YMAX2, the relationship of YMAX1> YMAX2 is established.
- the controller 25 maintains the control for supplying the illumination light from the light source unit 21 to the illumination fiber 12 and the control for supplying the drive signal from the driver unit 22 to the actuator 15, respectively.
- Two-frame images based on the respective color signals output from the detection unit 23 during a period corresponding to time T42 are generated during the period from time T43 to time T44 and displayed on the monitor 4. That is, each color signal output from the detection unit 23 during the period corresponding to the time T43 to the time T44 does not contribute to the generation of the image.
- the same operation as the operation from the time T43 to the time T44 described above is performed for every fixed period in which the scan for obtaining the image for two frames is completed. Therefore, according to the third modification described above, control such as temporarily stopping at least one of the swinging of the illumination fiber 12 and the supply of illumination light to the illumination fiber 12, etc. Without performing the above, it is possible to suitably synchronize the timing related to the irradiation of the illumination light to the subject and the timing related to the generation of the image according to the return light from the subject. As a result, according to the third modification described above, it is possible to improve the stability of the frame rate at the time of observation using the scanning endoscope as compared with the conventional case.
- FIG. 13 is a diagram for explaining a fourth modification of the signal waveform of the drive signal supplied to the actuator provided in the scanning endoscope.
- the first drive signal having a waveform as shown in FIG. 13 is supplied to the X-axis actuator of the actuator 15, and the second drive signal is obtained by shifting the phase of the second drive signal by 90 °.
- a first drive signal having a waveform as shown in FIG. 13 is supplied to the X-axis actuator of the actuator 15, and a second drive signal obtained by shifting the phase of the second drive signal by 90 ° is provided.
- the end including the light emitting surface of the illumination fiber 12 draws a circular locus centered on the point SA. Is swung as follows.
- the maximum amplitude value (signal level) in the period from time T53 to time T54 is greater than 0, and the maximum amplitude in the period from time T51 to time T52. It is set to have a constant value smaller than the value. Therefore, according to the waveform of the drive signal shown in FIG. 13, during the period from time T53 to time T54, the end including the light emission surface of the illumination fiber 12 follows, for example, the circular locus in FIG. May be swung along the circular trajectory of FIG. 10, or may be swung along the circular trajectory of FIG.
- the controller 25 maintains the control for supplying the illumination light from the light source unit 21 to the illumination fiber 12 and the control for supplying the drive signal from the driver unit 22 to the actuator 15, respectively, from time T51.
- Two-frame images based on the respective color signals output from the detection unit 23 during a period corresponding to time T52 are generated during the period from time T53 to time T54 and displayed on the monitor 4. That is, each color signal output from the detection unit 23 during a period corresponding to the time T53 to the time T54 does not contribute to the generation of an image.
- the same operation as the operation from the above-mentioned time T53 to time T54 is performed every fixed period in which the scanning for obtaining the image for two frames is completed. Therefore, according to the fourth modification described above, control such as temporarily stopping at least one of the swinging of the illumination fiber 12 and the supply of illumination light to the illumination fiber 12, etc. Without performing the above, it is possible to suitably synchronize the timing related to the irradiation of the illumination light to the subject and the timing related to the generation of the image according to the return light from the subject. As a result, according to the fourth modification described above, the stability of the frame rate during observation using the scanning endoscope can be improved as compared with the conventional case.
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Description
Claims (7)
- 光源から発せられた照明光を導く導光部と、前記導光部を経て被写体へ照射される前記照明光の照射位置が所定の走査パターンに応じた軌跡を描くように前記導光部を揺動させることが可能な駆動部と、前記被写体へ照射された前記照明光の戻り光を受光する受光部と、を備えた走査型内視鏡と、
前記受光部において受光された前記戻り光の強度に応じた信号を生成して出力するように構成された光検出部と、
前記照明光の照射位置が渦巻状の軌跡の最外点から中心点へ向かう第1の走査と、前記照明光の照射位置が前記渦巻状の軌跡の前記中心点から前記最外点へ向かう第2の走査と、を順次行うとともに、前記第1の走査及び前記第2の走査が行われた直後、または、前記第1の走査及び前記第2の走査が行われている最中のいずれかにおいて、前記照明光の照射位置が同一円周上を周回する第3の走査を行うように前記駆動部を駆動させるための制御を行う制御部と、
を有することを特徴とする走査型内視鏡システム。 - 前記第1の走査に応じて前記光検出部から出力される信号に基づく第1の画像、及び、前記第2の走査に応じて前記光検出部から出力される信号に基づく第2の画像のうちの少なくとも一方を、前記第3の走査が行われている期間中に生成する画像生成部を更に有することを特徴とする請求項1に記載の走査型内視鏡システム。
- 前記制御部は、前記第1の走査、前記第2の走査、及び、前記第3の走査を順次行うように前記駆動部を駆動させるための制御を行うことを特徴とする請求項1に記載の走査型内視鏡システム。
- 前記画像生成部は、前記第1の画像及び前記第2の画像を、前記第3の走査が行われている期間中に生成することを特徴とする請求項2に記載の走査型内視鏡システム。
- 前記制御部は、前記第3の走査において、前記渦巻状の軌跡における前記中心点と前記最外点との間の距離以下の所定の半径を具備する円状の軌跡に沿って前記照明光が照射されるように前記駆動部を駆動させるための制御を行うことを特徴とする請求項1に記載の走査型内視鏡システム。
- 前記制御部は、前記第1の走査の最中に一時的に前記第3の走査へ移行するとともに、前記第2の走査の最中に一時的に前記第3の走査へ移行するように前記駆動部を駆動させるための制御を行うことを特徴とする請求項1に記載の走査型内視鏡システム。
- 前記画像生成部は、前記第1の画像を、前記第2の走査から移行して前記第3の走査が行われている期間中に生成するとともに、前記第2の画像を、前記第1の走査から移行して前記第3の走査が行われている期間中に生成することを特徴とする請求項2に記載の走査型内視鏡システム。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13840096.5A EP2801316A4 (en) | 2012-09-19 | 2013-05-09 | ENDOSKOPABTASTSYSTEM |
| CN201380010143.4A CN104125796B (zh) | 2012-09-19 | 2013-05-09 | 扫描型内窥镜系统 |
| JP2014500196A JP5571268B1 (ja) | 2012-09-19 | 2013-05-09 | 走査型内視鏡システム |
| US14/162,164 US9345396B2 (en) | 2012-09-19 | 2014-01-23 | Scanning endoscope system |
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| JP2012-206102 | 2012-09-19 | ||
| JP2012206102 | 2012-09-19 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US14/162,164 Continuation US9345396B2 (en) | 2012-09-19 | 2014-01-23 | Scanning endoscope system |
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| Publication Number | Publication Date |
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| WO2014045631A1 true WO2014045631A1 (ja) | 2014-03-27 |
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| PCT/JP2013/063023 Ceased WO2014045631A1 (ja) | 2012-09-19 | 2013-05-09 | 走査型内視鏡システム |
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| Country | Link |
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| US (1) | US9345396B2 (ja) |
| EP (1) | EP2801316A4 (ja) |
| JP (1) | JP5571268B1 (ja) |
| CN (1) | CN104125796B (ja) |
| WO (1) | WO2014045631A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016019678A (ja) * | 2014-07-15 | 2016-02-04 | オリンパス株式会社 | 光走査型観察システム |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3150101A1 (en) * | 2014-05-28 | 2017-04-05 | Olympus Corporation | Optical scan observation device and optical scan observation device operation method |
| WO2016117160A1 (ja) * | 2015-01-20 | 2016-07-28 | オリンパス株式会社 | 走査型内視鏡装置 |
| JPWO2016117162A1 (ja) * | 2015-01-20 | 2017-04-27 | オリンパス株式会社 | 光走査型観察システム |
| JPWO2016116968A1 (ja) * | 2015-01-23 | 2017-12-07 | オリンパス株式会社 | 光走査装置 |
| WO2017138211A1 (ja) * | 2016-02-12 | 2017-08-17 | オリンパス株式会社 | 走査型内視鏡システム |
| JP2019507628A (ja) | 2016-02-24 | 2019-03-22 | エンドチョイス インコーポレイテッドEndochoice, Inc. | Cmosセンサを用いた複数ビュー要素内視鏡のための回路基板アセンブリ |
| JP6602979B2 (ja) * | 2016-07-11 | 2019-11-06 | オリンパス株式会社 | 内視鏡装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010063497A (ja) * | 2008-09-08 | 2010-03-25 | Hoya Corp | 光走査型内視鏡プロセッサおよび光走査型内視鏡システム |
| JP2010131112A (ja) | 2008-12-03 | 2010-06-17 | Hoya Corp | 内視鏡装置 |
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| JP2010117442A (ja) * | 2008-11-11 | 2010-05-27 | Hoya Corp | 光走査型内視鏡、光走査型内視鏡プロセッサ、および光走査型内視鏡装置 |
| US20100137684A1 (en) * | 2008-12-03 | 2010-06-03 | Hoya Corporation | Endoscope system with scanning function |
| JP2010131110A (ja) * | 2008-12-03 | 2010-06-17 | Hoya Corp | 内視鏡装置 |
| JP2010162090A (ja) * | 2009-01-13 | 2010-07-29 | Hoya Corp | 光走査型内視鏡 |
| JP5210894B2 (ja) * | 2009-01-13 | 2013-06-12 | Hoya株式会社 | 光走査型内視鏡 |
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| JP2010063497A (ja) * | 2008-09-08 | 2010-03-25 | Hoya Corp | 光走査型内視鏡プロセッサおよび光走査型内視鏡システム |
| JP2010131112A (ja) | 2008-12-03 | 2010-06-17 | Hoya Corp | 内視鏡装置 |
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Cited By (1)
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| JP2016019678A (ja) * | 2014-07-15 | 2016-02-04 | オリンパス株式会社 | 光走査型観察システム |
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| EP2801316A1 (en) | 2014-11-12 |
| JP5571268B1 (ja) | 2014-08-13 |
| CN104125796A (zh) | 2014-10-29 |
| US20140184768A1 (en) | 2014-07-03 |
| CN104125796B (zh) | 2016-08-17 |
| US9345396B2 (en) | 2016-05-24 |
| JPWO2014045631A1 (ja) | 2016-08-18 |
| EP2801316A4 (en) | 2016-01-13 |
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