JP2012130583A - Intravital observation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To irradiate a local area of a living body such as a prescribed region of the hand with light and to excellently acquire an living body transparent image of the local area of the living body.SOLUTION: The intravital observation device includes: a surface light emitting part 2 which has a light emitting surface 201 facing a living body placement area X and irradiates the living body in the living body placement area X with light; an imaging part 3 for receiving light transmitting the living body in the living body placement area X and outputting image data; and a light shield member 8 which is provided between the living body placement area X and the light emitting surface 201 of the surface light emitting part 2 and shields a part of the light emitted from the light emitting surface 201.

Description

  The present invention relates to an in-vivo observation apparatus that can easily acquire a real-time bioscopic fluoroscopic image at an arbitrary place.

  As a conventional in-vivo observation device, as shown in Patent Document 1, the subject to which an angiographic contrast agent is administered is alternately irradiated with excitation light and visible light in a specific wavelength range, and the imaging means The fluorescence image irradiated with the excitation light and the normal image are alternately acquired, and the acquired fluorescence image is thresholded with a predetermined threshold to extract a blood vessel image, and the extracted blood vessel image is superimposed on the acquired normal image A technique for creating a synthesized image is disclosed.

  However, in this technique, it is necessary to administer an angiographic contrast agent to a subject, and complicated image processing is required.

  Here, the inventor of the present application is developing an in-vivo observation apparatus that can acquire a bioperspective image without using an angiographic contrast agent or performing complicated image processing. This in-vivo observation device is configured to image, for example, blood vessels in the living body by irradiating the living body with light of a predetermined wavelength and receiving transmitted light from the living body. Here, for example, near-infrared light of 800 to 1000 nm is transmitted through living tissue, so an image captured by an imaging device such as a CCD camera is displayed white by receiving transmitted light, but a blood vessel portion is represented by hemoglobin in blood. Since near infrared light is absorbed, it appears black.

  When an attempt is made to observe the inside of a living body using the above in-vivo observation apparatus, for example, there are conceivable uses in which an entire inspection for inspecting the entire living body and a local inspection for inspecting a local region of the living body are considered.

  However, when using the same configuration for both the overall inspection and the local inspection, it is necessary to match the specifications to the overall inspection, and in performing the local inspection, the amount of light transmitted from other than the local area becomes excessive, There is a problem in that transmitted light caused by the local region of the light cannot be accurately detected, and as a result, the local inspection becomes inaccurate.

JP 2009-226072 A

  Accordingly, the present invention has been made to solve the above-mentioned problems all at once, and enables light to be irradiated to a local region of a living body such as a predetermined part such as a hand or a foot with a simple device configuration. At the same time, it is a main aim of the present invention to make it possible to suitably obtain a bioscopic image of a local region of the living body.

  That is, the in-vivo observation device according to the present invention has a light emitting surface facing the living body placement region, a surface light emitting unit that irradiates light to the living body in the living body placement region, and the surface with respect to the living body placement region. An imaging unit that is provided on the opposite side of the light emitting unit, receives light transmitted through the living body in the living body arrangement region and outputs image data, and is detachably provided to the surface light emitting unit, and the light emitting surface And a light shielding member that blocks part of the light emitted from the light source.

  If it is such, since the light shielding member which shields a part of light emitted from the light emitting surface is provided, the light irradiation range in the living body arrangement region can be narrowed, and light can be irradiated to the local region of the living body. . Moreover, since light can be irradiated to the local area | region of a biological body, the biopsy image of the local area | region of a biological body can be acquired suitably. Furthermore, since the light shielding member can be attached to and detached from the surface light emitting unit, a biopsy image of the whole living body such as the whole hand is acquired or a biopsy image of a local region of the living body such as a finger is obtained depending on the use. Acquisition can be easily switched by attaching and detaching the light shielding member. In addition, anyone can easily observe foreign bodies and blood vessels in the living body without requiring special techniques or experience. Since the inside of the living body can be observed without using X-rays, it is harmless to the human body even if light irradiation is performed for a long time, and because it is merely light irradiation, it is painful to the subject when confirming blood circulation. Never give. In addition, since the present invention can be easily miniaturized, it is possible to carry out various operations while bringing the in-vivo observation apparatus into the operating room and performing in-vivo observation in real time.

  In order for the imaging unit to receive light that is not blocked by the light blocking member, the light blocking member transmits the light from the light emitting surface to the living body placement region side, and a light blocking unit that blocks light from the light emitting surface. And the light-shielding member is detachably attached to the surface light source so that the opening center of the opening is on or near the optical axis of the imaging unit. It is desirable.

  When the light shielding member is configured to be detachable from the surface light source, it is desirable to have a fixing mechanism that positions and fixes the light shielding member with respect to the surface light source. In this case, since the light shielding member is positioned when it is fixed to the surface light source, the light shielding member is positioned with respect to the imaging unit, and it is necessary to position the imaging unit and the light shielding member one by one in each inspection. Disappears.

  In addition, when acquiring a fluoroscopic image of a local area of a living body, in order to prevent the imaging position from being different in each examination, the light shielding member is provided, and the living body is positioned with respect to the light shielding member. It is desirable to have a positioning member that irradiates a predetermined part of the living body with light that is not blocked by the light blocking member.

  As a specific embodiment of the surface light emitting unit, it is desirable that the surface light emitting unit irradiates the living body with light having a wavelength peak in a wavelength region of 800 to 1000 nm. In this way, near-infrared light of 800 to 1000 nm is transmitted through living tissue, so an image captured by an imaging device such as a CCD camera is displayed white by receiving transmitted light, but a blood vessel portion is represented by hemoglobin in blood. Since near infrared light is absorbed, it appears black. A technique for imaging a vein using such characteristics of near-infrared light is conventionally known, but a technique for imaging an artery using near-infrared light is not known. That is, for example, when near-infrared light is irradiated from the back of the finger, the light is scattered inside the finger and comes out to the ventral side of the finger, but the bones and arteries in the deep part of the finger are erased, and subcutaneously Only a certain vein is supposed to be imaged.

  On the other hand, the present inventor completely uses an imaging unit having a specific sensitivity in which the minimum detected light amount per output when receiving 0.4 to 10 μW of light is 0.055 μW / bit or less. Unexpectedly, the inventors have found that not only veins but also arteries can be imaged, and the present invention has been completed.

  As a specific structure of the surface light emitting unit, the surface light emitting unit includes a plurality of LEDs, a housing for housing the LEDs, and a light emitting surface provided on the light emission side of the LEDs in the housing. It is desirable to have a translucent member. Here, the translucent member preferably includes a diffusion plate that can diverge incident light at an angle of 55 ° or more. If this is the case, for example, when a plurality of LEDs are used as the light source, the light emitted from the plurality of LEDs is diffused by the diffusion plate, so that the brightness is uniformed and uneven irradiation is eliminated. It is possible to irradiate a living body as an observation target with the emitted light.

  The in-vivo observation device according to the present invention preferably includes a polarizing plate provided between the diffusion plate and the living body placement region. Since the polarizing plate is provided on the diffusion plate, it is possible to irradiate the living body with polarized light in the optimal vibration direction (transmission axis), and thus it is possible to reduce the reflection of light on the surface of the living body.

  According to the present invention having such a configuration, it is possible to irradiate light on a local region of a living body such as a predetermined part such as a hand or a foot with a simple device configuration, and to perform a biopsy of the local region of the living body. An image can be suitably acquired.

The schematic diagram which shows the structure of the in-vivo observation apparatus which concerns on one Embodiment of this invention. The perspective view which shows the structure of the in-vivo observation apparatus of the embodiment (light-shielding member not mounted). The top view which mainly shows the surface light emission part of the in-vivo observation apparatus of the embodiment. Sectional drawing which mainly shows the surface light emission part of the in-vivo observation apparatus of the embodiment. The disassembled perspective view of the surface light emission part of the embodiment. The photograph which imaged the finger using the in-vivo observation device concerning the embodiment. The perspective view which shows the structure of the in-vivo observation apparatus of the embodiment (shading member mounting | wearing). The side view which shows the structure of the in-vivo observation apparatus of the embodiment (shading member mounting | wearing). The top view which mainly shows the light-shielding member of the in-vivo observation apparatus of the embodiment. Sectional drawing which mainly shows the light-shielding member and surface emitting part of the in-vivo observation apparatus of the embodiment. Sectional drawing which shows the fixing mechanism of deformation | transformation embodiment. The perspective view which shows the positioning member which concerns on deformation | transformation embodiment.

  An embodiment of the present invention will be described below with reference to the drawings.

  The in-vivo observation device 100 according to the present embodiment irradiates a living body such as a hand or a foot with light, images the transmitted light transmitted from the living body, and displays a biological fluoroscopic image showing blood vessels, foreign bodies, and the like in the living body. Is something to get.

  Specifically, as shown in FIGS. 1 and 2, this has a light emitting surface 201 facing the living body placement region X, and a surface light emitting unit 2 that irradiates light to the living body in the living body placement region X. The imaging unit 3 is provided on the opposite side of the living body placement region X from the surface light emitting unit 2 and receives light transmitted through the living body in the living body placement region X and outputs image data. In the present embodiment, a configuration in which the surface light emitting unit 2 is provided on the lower side and the imaging unit 3 is provided on the upper side across the living body arrangement region X is shown.

  The surface light emitting unit 2 is provided on the apparatus base 100A and irradiates near-infrared light having a wavelength peak in the wavelength region of 800 to 1000 nm to the living body arrangement region X positioned above. Specifically, as illustrated in FIGS. 3 to 5, the surface light emitting unit 2 includes an LED mounting substrate 22 having a substantially rectangular plate shape on which a plurality of LEDs 21 are mounted, and a rectangular shape in plan view that accommodates the LED mounting substrate 22. The housing 23 has a shape, and a light-transmitting member 24 that is provided on the light emission side of the LED 21 in the housing 23 and forms the light emitting surface 201.

  As shown in FIGS. 4 and 5 in particular, the LED mounting board 22 is fixed to the upper surface of the apparatus base 100A, and power is supplied from the power supply unit 4 (see FIG. 1). A plurality of LEDs 21 are mounted on the upper surface of the LED mounting substrate 22 in, for example, a vertical and horizontal matrix. As the LED 21, for example, it is conceivable to use a 170 mW LED having a wavelength peak at 810 nm.

  As shown in FIG. 4 in particular, the housing 23 is fixed to the upper surface of the apparatus base 100A so as to surround the LED mounting substrate 22, and is mounted on one side surface (the rear surface located on the back side in this embodiment). A plurality of through-holes 23h for LED heat dissipation are formed. Further, although not shown, a heat dissipation fan for heat dissipation of LEDs is provided in the vicinity of the plurality of through holes 23h. Power is also supplied from the power supply unit 4 to the heat radiating fan.

  The translucent member 24 is attached to the upper opening of the housing 23 and has a substantially rectangular plate shape that is substantially the same shape as the upper opening of the housing 23 in plan view. The translucent member 24 diffuses light emitted from the plurality of LEDs 21, uniformizes the luminance of light emitted from the upper opening of the housing 23, and irradiates the living body with light without uneven irradiation. The upper surface of the translucent member 24 becomes the light emitting surface 201.

  As the diffusion plate, for example, the surface of the light-transmitting substrate is provided with irregularities by embossing or embossing, etc., and the surface is configured as a ground glass surface, or white paint is provided on the surface of the light-transmitting substrate with a gap. Various materials that have been imparted with light diffusibility using light scattering, such as those coated and particles containing light scattering particles in a light-transmitting substrate, can be used. Among such diffuser plates, those made of acetal resin and capable of diverging incident light at an angle of 55 ° or more are preferably used. By using a diffusion plate having such a divergence angle, it is possible to eliminate irradiation unevenness and irradiate the inspection object uniformly.

  In order to confirm this, the LED is fitted into a light shielding plate with a hole of φ5 mm, the thickness of the diffusion plate placed on the light shielding plate is changed, and the light intensity (I) directly above the LED is The ratio (Im / I) to the light intensity (Im) immediately above the midpoint of the two LEDs when the LEDs were arranged at an interval of 10 mm was determined. The closer the Im / I value is to 1, the more the illuminance unevenness is eliminated. The results obtained are shown in Table 1.

  As a result, when a diffuser plate that can diverge light emitted from the light source at an angle of 55 ° or more was used, all Im / I values were 0.85 or more, and a sufficient illuminance unevenness eliminating effect was confirmed.

  A partition plate 25 is provided on the rear surface of the translucent member 24 to regulate light emitted from the plurality of LEDs 21 within a predetermined range. The partition plate 25 has the same shape as the translucent member 24 in plan view, and an opening 251 for emitting light from the LED 21 to the outside (upper part) is formed at the center. With such a configuration, a portion corresponding to the opening 251 of the partition plate 25 on the upper surface of the translucent member 24 becomes the light emitting surface 201. That is, the light emitting surface 201 of the surface light emitting unit 2 has the same shape as the planar view shape of the opening 251 of the partition plate 25.

  The imaging unit 3 is provided in the upper part of the living body placement region X, and receives light transmitted through the living body in the living body placement region X, and outputs image data indicating a living body fluoroscopic image. The imaging unit 3 of the present embodiment is a digital camera, and has a specific sensitivity such that the minimum detected light amount per output when receiving light of 0.4 to 10 μW is 0.055 μW / bit or less. Specifically, a CCD camera, a COMS camera, or the like can be used.

  The imaging unit 3 is fixed to a stand member 5 erected in the vertical direction with respect to the apparatus base 100 </ b> A so as to be movable back and forth with respect to the surface light emitting unit 2. Specifically, a slide mechanism 6 is provided between the imaging unit 3 and the stand member 5. The slide mechanism 6 slides the imaging unit 3 in a vertical direction with respect to the light emitting surface 201 within a predetermined range.

  The biological fluoroscopic image obtained by the imaging unit 3 is output to the information processing apparatus 7 such as a computer via the power supply unit 4 (see FIG. 1). The biological fluoroscopic image is displayed on the display unit screen of the information processing apparatus 7 and is subjected to image processing by the image processing function of the information processing apparatus 7. Note that at least the display unit that displays a biological fluoroscopic image may be provided in the in-vivo observation device 100 in advance.

  Using the in-vivo observation device 100 provided with a CCD camera having a minimum detected light quantity per output when receiving 0.4 to 10 μW of light as the imaging unit 3, a light emitting surface FIG. 6A shows an image obtained by placing a finger on 201 and irradiating near infrared light from the back of the finger and observing the blood vessels of the finger. As shown in FIG. 6, it was confirmed that the blood vessels represented in black were clearly observed. The CCD camera has a detected light amount of 0.33 μW when the digital output corresponding to the luminance (hereinafter simply referred to as luminance output) is 11 bits, and the detected light amount when the luminance output is 197 bits. The sensitivity was 10.21 μW, and a linear relationship was recognized between the luminance output and the detected light amount in this range. On the other hand, when a CCD camera with lower sensitivity (minimum detected light intensity exceeds 0.055 μW / bit) was used, the blood vessel of the finger could not be observed as shown in FIG. FIG. 6C is an image obtained by observing a blood vessel of a finger in a state where a light shielding member 8 described later is mounted.

  According to the in-vivo observation device 100 according to the present embodiment configured as described above, anyone can easily observe a foreign substance or blood vessel in the living body without requiring any special technique or experience. Moreover, since this in-vivo observation apparatus 100 is equipped with the imaging part 3 which has the specific sensitivity whose minimum detection light quantity per output at the time of receiving the light of 0.4-10 microW is 0.055 microwatt / bit or less. It is possible to image not only veins but also arteries.

  Accordingly, the in-vivo observation device 100 according to the present embodiment is provided so as to be detachable from the surface light emitting unit 2 as shown in FIGS. 7 to 10, and blocks the light emitted from the light emitting surface 201. It has. FIG. 7 shows a state where the light shielding member 8 is attached to the in-vivo observation device 100 of FIG.

  As shown in FIG. 9 in particular, the light shielding member 8 has a rectangular plate shape in plan view that is substantially the same shape as the light transmissive member 24 of the surface light emitting unit 2 in plan view, and transmits light from the light emitting surface 201. The light-shielding part 81 which shields and the opening part 82 which permeate | transmits the light from the light emission surface 201 to the biological body arrangement | positioning area | region X side are provided. The opening 82 provided in the light shielding member 8 has a smaller opening size than the opening 251 provided in the partition plate 25. A specific shape of the opening 82 is a substantially circular shape in plan view.

  Then, the light shielding member 8 is detachably attached to the surface light emitting unit 2 by the fixing mechanism 9 described later so that the opening center of the opening 82 is on or near the optical axis 3C of the imaging unit 3 ( (See FIG. 8). Note that the opening center of the opening 82 and the opening center of the opening 251 of the partition plate 25 substantially coincide with each other in plan view, and the opening of the opening 251 of the partition plate 25 on the optical axis 3C of the imaging unit 3. There is a center.

  The fixing mechanism 9 positions and fixes the light shielding member 8 with respect to the light emitting surface 201 of the surface light emitting unit 2, and specifically positions the light shielding member 8 in the plane direction of the light emitting surface 201. is there. As shown in FIG. 9, the fixing mechanism 9 of the present embodiment is provided on the four side portions of the light shielding member 8, and from the locking pieces 9 a to 9 d that are in contact with the four side surfaces 2 a to 2 d of the surface light emitting unit 2. Is formed. The locking pieces 9 a to 9 d are provided at the four corners of the light shielding member 8. By this fixing mechanism 9, the center of the opening 82 of the light shielding member 8 and the center of the light emitting surface 201 of the surface light emitting unit 2 coincide with each other, and the center of the opening 82 of the light shielding member 8 is the optical axis of the imaging unit 3. Located on 3C.

  As shown in FIG. 7 and the like, the light shielding member 8 positions the living body to be inspected in the horizontal direction with respect to the light shielding member 8 and the light emitting surface 201, and transmits light not blocked by the light shielding member 8 to a predetermined part of the living body. A positioning member 10 is provided for irradiation.

  The positioning member 10 of the present embodiment contacts a predetermined finger and positions the predetermined finger in the opening 82 of the light shielding member 8. As shown in FIGS. 9 and 10, the opening of the light shielding member 8 is positioned. A through hole 10 h communicating with the portion 82 is provided. As shown in FIGS. 7 and 9, the positioning member 10 includes a first contact surface 10a having a substantially planar shape that is positioned on the back side (stand member side) of the opening 82 and contacts the tip of the finger, and an opening. And a second contact surface 10b having a substantially V-shape that is located on the left and right of the part 82 and contacts an arbitrary surface of the finger (for example, the upper surface of the finger (back of the finger)). The valley line 10 b 1 of the second contact surface 10 b is configured to pass through the center of the opening 82 of the light shielding member 8. The position of the finger in the depth direction (Y direction in FIG. 9) with respect to the opening 82 is positioned by the first contact surface 10a, and the left and right direction (X direction in FIGS. 9 and 10) with respect to the opening 82 by the second contact surface 10b. The finger position is determined. Since the opening center of the opening 82 and the optical axis 3C of the imaging unit 3 substantially coincide with each other, the positioning member 10 positions the finger also with respect to the optical axis 3C of the imaging unit 3. .

  With this in-vivo observation device 100, a perspective image of a living body located within the general region of the living body, that is, the entire light emitting surface 201 with the light shielding member 8 removed (specifically, a fluoroscopic image of most of the hand) (See FIG. 6A). On the other hand, a fluoroscopic image of a living body (specifically, a fluoroscopic image of a predetermined part of a finger) located in a local region of the living body, that is, within the range of the opening 82 of the light shielding member 8 with the light shielding member 8 attached is taken ( (Refer FIG.6 (c)).

<Effect of this embodiment>
According to the in-vivo observation device 100 according to the present embodiment configured as described above, since the light shielding member 8 that blocks part of the light emitted from the light emitting surface 201 is provided, the light irradiation range in the living body placement region X is narrowed. And can irradiate the local area of the living body with light. Moreover, since light can be irradiated to the local area | region of a biological body, the biopsy image of the local area | region of a biological body can be acquired suitably.

  Furthermore, since the light shielding member 8 can be attached to and detached from the surface light emitting unit 2, a bioscopic image of the whole living body such as the whole hand is obtained or a biological fluoroscopy of a local region of the living body such as a finger, depending on the use. Acquisition of an image can be easily switched by attaching and detaching the light shielding member 8. Further, since the living body is positioned with respect to the light emitting surface 201 by the positioning member 10, it is possible to irradiate a predetermined region of the living body with light. Further, since the living body is imaged by the imaging unit 3 positioned with respect to the surface light emitting unit 2, processing after imaging such as comparing images obtained by the imaging unit 3 can be facilitated.

  In addition, with the in-vivo observation device 100 of the present embodiment, anyone can easily observe foreign bodies and blood vessels in the living body without requiring special techniques or experience. Since the inside of the living body can be observed without using X-rays, it is harmless to the human body even if light irradiation is performed for a long time, and because it is merely light irradiation, it is painful to the subject when confirming blood circulation. Never give. In addition, since the present invention can be easily miniaturized, various operations can be performed while the in-vivo observation device 100 is brought into an operating room and in-vivo observation is performed in real time.

<Other modified embodiments>
The present invention is not limited to the above embodiment. For example, as shown in FIG. 11, the fixing mechanism 9 may include a convex portion 91 provided on the lower surface of the light shielding member 8 and a concave portion 92 provided on the upper surface of the translucent member 24. In FIG. 11, the plurality of convex portions 91 and the plurality of concave portions 92 are positioned in the plane direction. You may make it position in a direction. In addition, you may comprise by providing a recessed part in the lower surface of a light shielding member, and a convex part in the upper surface of a translucent member.

  Moreover, although the positioning member 10 of the said embodiment has the 1st contact surface 10a and the 2nd contact surface 10b, even if it has only the 1st contact surface 10a or the 2nd contact surface 10b. good. In this case, the first contact surface 10a may have a V-shape in plan view as shown in FIG. In this case, it is conceivable that the bent line of the first contact surface 10a is formed so as to match the position of the opening 82 in the X direction. Further, regarding the positioning, a positioning line or a figure may be drawn on the upper surface of the light shielding member 8. The finger may be positioned with respect to the opening by arranging the finger according to the positioning line or the drawing.

  In addition, the opening 82 of the light shielding member 8 of the above embodiment has a substantially circular shape in plan view. In addition, a polygonal shape such as a rectangular shape in plan view, an elliptical shape or oval shape in plan view, and a portion in plan view. Any shape can be used as long as it reduces the light emitting area of the light emitting surface, such as a circle. At this time, it is conceivable to prepare a light-shielding member having various openings in accordance with the size of the local region from which a biological fluoroscopic image is to be obtained, and replace it appropriately depending on the application.

  Further, although the positioning member of the embodiment is provided on the light shielding member, it may be provided separately from the light shielding member.

  In addition, in the above embodiment, the positioning member 10 positions the local region of the living body (predetermined region of the finger) with respect to the opening 82 of the light shielding member 8. The living body may be positioned with respect to the light emitting surface 201 of the unit 2.

  In addition, the positioning member 10 of the above-described embodiment is for positioning the finger to acquire a fluoroscopic image of a hand finger as a living body, but the foot for acquiring a fluoroscopic image of a toe A configuration for positioning may be used.

  Further, a polarizing plate and a cut filter may be provided on the translucent member 24 of the in-vivo observation device 100.

  The polarizing plate is provided so as to overlap the surface (upper surface) on the side opposite to the light source of the translucent member that is a diffusion plate, and produces linearly polarized light from the light diffused and uniformed by the diffusion plate. As the polarizing plate, for example, a film-like one made of resin is used. Since the polarizing plate is provided over the diffusion plate, the living body can be irradiated with polarized light in the optimum vibration direction (transmission axis), and thus reflection of light on the surface of the living body can be reduced. In this embodiment, a living body can be placed on the polarizing plate and observed. By using such a diffuser plate and a polarizing plate to adjust the light quality and the amount of light applied to the living body to be observed, an image with clear contrast can be obtained.

  The cut filter is provided at the light entrance of the imaging unit and prevents disturbance light such as sunlight from entering the imaging unit. By providing such a cut filter, disturbance light (visible light) can be blocked, so that a clear image with reduced noise can be obtained. The light transmitted through the living body is collected by a condensing lens in the image pickup unit, and forms an image on a light receiving plane of an image pickup device such as a CCD image sensor. Then, by selecting an appropriate condenser lens, the entire light emitting surface 201 of the surface light emitting unit 2 can be set as the imaging range. For example, when the light emitting surface 201 has a size of 80 × 100 mm, a condensing lens having a focal length of 6 to 10 mm is preferably used.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... In-vivo observation apparatus X ... Living body arrangement | positioning area | region 2 ... Surface light emission part 201 ... Light emission surface 21 ... LED
23 ... Housing 24 ... Translucent member 3 ... Imaging unit 3C ... Optical axis 8 of imaging unit ... Shading member 81 ... Shading part 82 ... Opening 9 ... Fixing mechanism 10 ... positioning member

Claims (6)

A light emitting surface facing the living body placement region, and a surface light emitting unit that irradiates light to the living body in the living body placement region;
An imaging unit that is provided on the opposite side of the surface emitting unit with respect to the living body placement region, receives light transmitted through the living body in the living body placement region, and outputs image data;
An in-vivo observation device comprising: a light-shielding member that is detachably attached to the surface light-emitting unit and blocks a part of light emitted from the light-emitting surface. The light-shielding member has a light-shielding portion that shields light from the light-emitting surface and an opening that transmits light from the light-emitting surface to the living body placement region side;
The in-vivo observation apparatus according to claim 1, wherein the light shielding member is detachably attached to the surface light emitting unit such that an opening center of the opening is on or near the optical axis of the imaging unit. .   The in-vivo observation apparatus according to claim 1, further comprising a fixing mechanism that positions and fixes the light shielding member with respect to the surface light source.   4. The positioning device according to claim 1, further comprising: a positioning member that is provided on the light shielding member, positions the living body with respect to the light shielding member, and irradiates a predetermined part of the living body with light that is not blocked by the light shielding member. The in-vivo observation device according to claim 1. The surface light emitting unit irradiates the living body with light having a wavelength peak in a wavelength region of 800 to 1000 nm,
The in-vivo observation device according to any one of claims 1 to 4, wherein the imaging unit is a digital camera having a minimum detected light amount per output when receiving 0.4 to 10 µW of light, and having a 0.055 µW / bit or less. . The surface light emitting unit includes a plurality of LEDs, a housing that houses the LEDs, and a translucent member that is provided on the light emission side of the LED in the housing and forms the light emitting surface.
The in-vivo observation device according to any one of claims 1 to 5, wherein the translucent member is a diffusion plate that can diverge incident light at an angle of 55 ° or more.