JP2017104395A - Fixing device and x-ray talbot imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing device capable of fixing an elbow joint part, thereby accurately retaining the position and angle of the elbow joint part of a subject.SOLUTION: A fixing device 20 includes: an upper-arm fixing part 22 for fixing an upper arm A of a subject H; a forearm fixing part 23 for fixing a forearm B of the subject H; flexing/extending angle adjusting mechanisms 23e and 26 capable of adjusting flexing/extending angles between the upper arm A and the forearm B at a joint part of an elbow E of the subject H; and inclination angle adjusting mechanisms 24, 24a, and 27 capable of adjusting an inclination angle of a virtual plane including the upper arm A and the forearm B at the joint part of the elbow E of the subject H with respect to an X-ray irradiation direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an elbow fixing device used in an X-ray Talbot imaging apparatus using a Talbot interferometer or a Talbot-Lau interferometer.

  Talbot interferometers and Talbot-Lau interferometers and X-ray detectors (FPD) that capture and image the phase shift of X-rays that occur when X-rays pass through an object ) Is known (for example, see Patent Document 1, Non-Patent Document 1, etc.). Hereinafter, an X-ray imaging apparatus using such a Talbot interferometer, Talbot-Lau interferometer, or the like is referred to as an X-ray Talbot imaging apparatus.

  The X-ray Talbot radiographing apparatus includes a G1 grating (phase grating) and a G2 grating (absorption grating) provided with slits at a constant period (when using a Talbot-Lau interferometer, a G0 grating which is a source grating) The G2 grating is arranged at a position where the self-image of the G1 grating is connected at a constant period on the downstream side in the X-ray irradiation direction of the G1 grating by irradiating the G1 grating from the X-ray source. The moiré fringes are formed on the G2 lattice by arranging the G2 lattice so that the extending direction of the slit is slightly inclined with respect to the extending direction of the slit in the G1 lattice. An image on which the moire fringes are superimposed (hereinafter referred to as a moire image) is detected and photographed by an X-ray detector arranged on the downstream side of the G2 grating.

  When the subject is arranged between the X-ray source (or G0 lattice) and the G1 lattice or between the G1 lattice and the G2 lattice, the moiré fringes are distorted by the subject. For this reason, an X-ray Talbot imaging device captures a plurality of moire images while relatively moving the G1 lattice and the G2 lattice (stripe scanning method), and reconstructs the moire images in image processing. Reconstructed images such as differential phase images, absorption images, and small angle scattered images can be generated. In addition, a moiré image is taken with an X-ray Talbot imaging device in the presence of a subject, and a reconstructed image such as a differential phase image is reconstructed by Fourier transforming the moiré image in image processing. It is also possible to generate (Fourier transform method).

  In the research conducted by the present inventors, the differential phase image generated by reconstructing the moiré image captured by the X-ray Talbot imaging device in this way is conventionally captured as an absorption image (see FIG. 13). The end of the cartilage of the joint that could not be obtained (exactly the interface between the joint cartilage and the surrounding joint fluid; the same applies hereinafter) can be taken in the image as shown by the arrows in FIG. I know that Further, in the differential phase image, it has been found that not only the cartilage of the joint but also a tendon such as an Achilles tendon and a soft tissue of a human body such as a tumor can be imaged.

  By the way, when a moiré image of a subject is captured by an X-ray Talbot imaging device, if the subject moves (that is, if the subject moves), the captured moiré image is reconstructed to generate a differential phase image or the like. However, the differential phase image or the like cannot be reconstructed, or the reconstructed differential phase image or the like becomes an abnormal image, so that the differential phase image or the like cannot be accurately reconstructed and generated.

  For this reason, various fixing devices have been developed for fixing the body (imaging site) of a patient as a subject so that no body movement occurs. Further, although a gazette or the like related to a fixing device for fixing a joint part of a patient's elbow in an X-ray Talbot imaging device cannot be found, for example, for ultrasonic diagnosis, Patent Document 2 discloses a joint part of a patient's elbow. And a fixing device for adjusting the positional relationship between the ultrasonic probe and the joint portion of the elbow is described.

JP 2009-240378 A JP 2014-212878 A

Masafumi Nagashima, 7 others, "Drawing articular cartilage-Possibility of X-ray imaging technique applying the principle of differential interference (Record of the 14th Clinical Anatomy Study Meeting 2011.9.11)", Record of Clinical Anatomy Study Group, February 2011, No. 11, p. 56-57, [Search December 10, 2015], Internet <URL: http://www.jrsca.jp/contents/records/>

  By the way, when imaging a joint part of a patient with an X-ray Talbot imaging device, as shown in FIGS. 15A and 15B, for example, the joint is viewed from the X-ray generation device side that irradiates the subject with X-rays. In a state where the joint head Ah of one bone B1 and the peripheral edge Br of the joint fossa Af of the other bone B2 overlap each other, the joint head Ah of the bone B1 and the peripheral edge Br of the glenoid Af of the bone B2 are blocked. The cartilage cannot be taken.

  Therefore, in order to accurately capture cartilage as shown in FIG. 14 with an X-ray Talbot imaging device, the upper arm side (trunk side) and the forearm side (peripheral side) It is necessary to fix the position and angle with respect to the irradiation direction of the line with high accuracy so that the position and angle at which the cartilage can be imaged.

  In addition, the X-ray Talbot imaging apparatus can image not only cartilage, but also, for example, bones constituting the joints of elbows and loose joints (so-called joint mice) in which a part of the cartilage is peeled off. However, even when taking a differential phase image, an absorption image, etc. of such a joint free body, if it is taken at a position or angle such that the joint free body and the bone overlap when viewed from the X-ray generator side, The inner free body is hidden in the bone and cannot be photographed in the image.

  Therefore, in this case as well, it is necessary to accurately adjust and fix the position and angle of the joint part of the patient's elbow, which is the subject, with respect to the X-ray irradiation direction. It is practically difficult to fix the elbow joint part so that the position and angle of the elbow joint part with respect to the X-ray irradiation direction are maintained at an appropriate position and angle with a fixing device or the like.

  The present invention has been made in view of the above points, and a fixing device capable of fixing the joint portion of the elbow so that the position and angle of the joint portion of the subject's elbow are accurately maintained, and the same An object of the present invention is to provide an X-ray Talbot imaging apparatus provided.

In order to solve the above-mentioned problem, the fixing device of the present invention includes:
An upper arm fixing part for fixing the upper arm of the subject;
A forearm fixing part for fixing the forearm of the subject;
A bending / extension angle adjusting mechanism capable of adjusting a bending / extension angle between the upper arm and the forearm in a joint part of an elbow of a subject;
An inclination angle adjusting mechanism capable of adjusting an inclination angle with respect to an X-ray irradiation direction of an imaginary plane including the upper arm and the forearm in the joint portion of the elbow of a subject;
It is characterized by providing.

Moreover, the X-ray Talbot imaging apparatus of the present invention is
A plurality of gratings including a phase grating;
A subject table for holding the subject;
An X-ray generator for irradiating the subject with X-rays;
An X-ray detector for taking a moire image;
With
On the subject table, the above-described fixing device of the present invention is provided,
The position and angle of the joint portion of the elbow of the subject with respect to the X-ray irradiation direction are fixed by the fixing device.

  According to the fixing device and the X-ray Talbot imaging device of the present invention, it is possible to fix the joint portion of the elbow so that the position and angle of the joint portion of the elbow of the subject are accurately maintained.

It is a figure explaining the principle of a Talbot interferometer. It is a schematic plan view of G0 lattice, G1 lattice, and G2 lattice. It is the schematic showing the whole structure of the X-ray Talbot radiography apparatus concerning this embodiment. It is a perspective view showing the fixing device concerning this embodiment. It is a side view showing the fixing device concerning this embodiment, and is a figure explaining bending-extension angle (alpha) of an upper arm and a forearm. It is a top view showing the fixing device concerning this embodiment. It is a top view showing the structural example of an elbow position fixing member. It is sectional drawing explaining fixing with the two fixing tools of an upper arm fixing | fixed part pinching an upper arm from a side. It is a figure showing the structural example of the holder for fixing the wrist | wrist of a to-be-photographed object. It is a figure explaining the inclination | tilt angle (beta) of the forearm centering on the upper arm in the joint part of an elbow. (A) It is a front view showing the structural example of an inclination angle adjustment mechanism, (B) It is a side view showing the angle etc. with respect to the base part of the principal part of a inclination angle adjustment mechanism, a 2nd virtual plane, and a 2nd virtual plane. is there. It is a figure explaining the twist angle of a forearm. It is a photograph showing the example of an absorption image. It is the photograph showing the edge part of the example of a differential phase image, and the cartilage of a joint. (A), (B) It is a figure showing the state which the joint head of one bone of a joint part overlaps with the peripheral part of the glenoid of the other bone seeing from the X-ray generator side.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a fixing device and an X-ray Talbot imaging device according to the present invention will be described with reference to the drawings.

[Principle of X-ray Talbot Imaging System]
First, the principle of the X-ray Talbot imaging apparatus, that is, the principle common to the Talbot interferometer and Talbot-Lau interferometer used in the X-ray Talbot imaging apparatus will be briefly described with reference to FIG. In FIG. 1, the case of the Talbot interferometer is shown, but the case of the Talbot-low interferometer is basically explained in the same manner.

  In the Talbot interferometer, an X-ray generator 11, a G1 grating 14 that is a phase grating, a G2 grating 15 that is an absorption grating, and an X-ray detector 16, as shown in FIG. are arranged in order in the z direction). In the case of a Talbot-Lau interferometer, although not shown in FIG. 1, a G0 grating 12 (see FIG. 2 and FIG. 3 described later) as a source grating is arranged in the vicinity of the X-ray generator 11. Is done.

  As shown in FIG. 2, the G1 grating 14 and the G2 grating 15 (also the G0 grating 12 in the case of a Talbot-Lau interferometer) have a predetermined x-direction perpendicular to the z-direction that is the X-ray irradiation direction. A plurality of slits S are arranged with a period d. The predetermined period d is different for each of the G1 grating 14, the G2 grating 15, and the G0 grating 12.

  X-rays emitted from the X-ray generator 11 (in the case of a Talbot-Lau interferometer, X-rays emitted from the X-ray generator 11 are converted into multiple light sources by the G0 grating 12) are G1 gratings 14. , The transmitted X-rays form an image at regular intervals in the z direction. This image is called a self-image (also referred to as a lattice image), and a phenomenon in which self-images are formed at a certain interval in the z direction is called a Talbot effect.

  As shown in FIG. 1 and the like, the G2 grating 15 provided with the slits S is arranged at the position where the self-image of the G1 grating 14 joins the image. The extending direction of the slit S (that is, the y direction in FIG. 1 and the like) is arranged so as to have a slight angle with respect to the extending direction of the slit S of the G1 lattice 14. And by arranging in this way, a moire image Mo consisting only of moire fringes appears on the G2 lattice 15.

  In FIG. 1, if the moire image Mo is described on the G2 lattice 15, the moire fringes and the slits S are mixed and it becomes difficult to understand. Therefore, the moire image Mo is illustrated separately from the G2 lattice 15. Actually, the moire image Mo is formed on the G2 lattice 15 or on the downstream side thereof.

  On the other hand, if the subject H exists, the subject H causes the X-ray phase to shift. For this reason, the moiré fringes of the moiré image Mo are disturbed with the edge of the subject as a boundary, and the moiré image Mo in which the turbulence is caused by the subject H as shown in FIG.

  The above is the principle of the Talbot interferometer and the Talbot low interferometer. And it is comprised so that said Moire image Mo may be image | photographed with the X-ray detector 16 (refer FIG. 3 mentioned later) arrange | positioned downstream of the G2 grating | lattice 15. FIG. An X-ray Talbot imaging apparatus is configured according to the above principle.

[Configuration of X-ray Talbot Imaging System]
Hereinafter, the X-ray Talbot imaging apparatus 1 according to the present embodiment configured based on the above principle will be described. FIG. 3 is a schematic diagram illustrating the overall configuration of the X-ray Talbot imaging apparatus according to the present embodiment. In the present embodiment, the case where the X-ray Talbot imaging apparatus 1 is an X-ray Talbot imaging apparatus using a Talbot-Lau interferometer including the G0 grating 12 that is a source grating will be described. The same applies to an X-ray Talbot imaging apparatus using a Talbot interferometer that includes only the G1 grating 14 and the G2 grating 15.

  In the following, as shown in FIG. 3, the X-ray Talbot imaging apparatus 1 is configured to emit X-rays toward a lower subject H from an X-ray generator 11 provided on the upper side. (In other words, the case where the X-ray Talbot imaging apparatus is a so-called vertical type) will be described, but the present invention is not limited to this case, and the X-ray generator 11 can be configured to emit X-rays in the horizontal direction. (For example, see FIG. 1. That is, when the X-ray Talbot imaging apparatus is a so-called horizontal type), it can be configured to irradiate X-rays in an arbitrary direction.

  As shown in FIG. 3, the X-ray Talbot imaging apparatus 1 according to the present embodiment includes an X-ray generator 11, a G0 grating 12, a subject table 13, a G1 grating 14, a G2 grating 15, and an X-ray detection. A container 16, a support column 17, a base unit 18, and a controller 19 are provided.

  The X-ray generator 11 includes a cooling ridge X-ray source, a rotary anode X-ray source, and the like that are widely used in the medical field, for example. Moreover, it is also possible to comprise other X-ray sources (tubes). Note that Ca in FIG. 1 represents the optical axis center of X-rays emitted from the X-ray generator 11.

  In this embodiment, the G0 lattice 12 is provided downstream of the X-ray generator 11 in the X-ray irradiation direction (that is, the z direction). In order to prevent the vibration of the X-ray generator 11 from being transmitted to the G0 lattice 12 and the like, in this embodiment, the G0 lattice 12 is not attached to the X-ray generator 11 and is provided on the support column 17. The fixing member 12a attached to the base 18 is attached.

  In addition to the G0 lattice 12, the fixing member 12 a has a filtration filter (also referred to as an additional filter) 112 for changing the quality of X-rays transmitted through the G0 lattice 12, and the irradiated X-rays. An irradiation field stop 113 for narrowing the irradiation field, an irradiation field lamp 114 for irradiating the subject H with the visible light instead of the X-ray before the X-ray irradiation, and the like are attached. A first cover unit 120 is arranged around the G0 lattice 12 and the like to protect them.

  Further, on the downstream side of the G0 grating 12 in the X-ray irradiation direction (that is, the z direction), a subject table 13 that holds the subject H, a G1 grating 14, a G2 grating 15, an X-ray detector 16, and the like are provided. Yes. At this time, as described above, the G2 grating 15 is arranged at a position where X-rays irradiated from the X-ray generator 11 and transmitted through the G1 grating 14 form self-images at a constant interval from the G1 grating 14 in the z direction. In addition, the distance between the G1 lattice 14 and the G2 lattice 15 is adjusted.

  Then, the X-ray detector 16 is arranged immediately below the G2 grating 15, and the moiré image Mo generated on the G2 grating 15 as described above is configured to be photographed by the X-ray detector 16. In this embodiment, as shown in FIG. 3, the X-ray detector 16 and the like are protected by preventing the patient's legs from hitting or touching the G1 grid 14, the G2 grid 15, the X-ray detector 16, and the like. In order to do so, a second cover unit 130 is provided.

  Although not shown, the X-ray detector (FPD) 16 is configured by two-dimensionally (matrix-shaped) conversion elements that generate electrical signals according to the irradiated X-rays. An electric signal generated by the conversion element is configured to be read as an image signal. In the present embodiment, the X-ray detector 16 captures the moire image Mo, which is an X-ray image formed on the G2 grating 15, as an image signal for each conversion element.

  When the X-ray Talbot imaging apparatus 1 is configured to capture a plurality of moire images Mo using a so-called fringe scanning method, the relative positions of the G1 grating 14 and the G2 grating 15 are shown in FIG. A plurality of moire images Mo are taken while shifting in the x direction in 2 (that is, the direction orthogonal to the extending direction (y direction) of the slits S). And although illustration is abbreviate | omitted, the moving apparatus etc. for shifting the relative position of G1 grating | lattice 14 and G2 grating | lattice 15 are provided. In addition, when the X-ray Talbot imaging apparatus 1 is configured to take one moire image Mo and perform Fourier transform or the like to reconstruct and generate a differential phase image or the like, a moving device or the like is used. There is no need to provide it.

  In the present embodiment, the controller 19 (see FIG. 3) is composed of a computer (not shown) having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input / output interface, etc. connected to the bus. Has been. The controller 19 can be configured as a dedicated control device instead of a general-purpose computer as in the present embodiment. Although not shown, the controller 19 is provided with appropriate means and devices such as input means and display means.

  The controller 19 performs general control over the X-ray Talbot imaging apparatus 1 such as setting a tube voltage, a tube current, an irradiation time, etc. in the X-ray generator 11. In addition, when the X-ray Talbot imaging device 1 is configured to capture a plurality of moire images Mo by the fringe scanning method, the controller 19 controls the moving device to control the G1 grid 14 (or G2). The grid 15 or both) is controlled to move by a predetermined amount.

  Further, the controller 19 reconstructs itself an absorption image (see FIG. 13), a differential phase image (see FIG. 14), etc. based on one or more moire images Mo transmitted from the X-ray detector 16. Or one or more moire images Mo transmitted from the X-ray detector 16 are transferred to an external image processing apparatus (not shown) to reconstruct an absorption image, a differential phase image, or the like. Configured to generate.

  In the present embodiment, as described above, the controller 19 is configured to function as a generator of the X-ray generation device 11, a moving device such as the G1 lattice 14, an image processing device of the moire image Mo, and the like. These functions can be configured to be performed by separate devices.

[Fixing device]
Next, the fixing device 20 according to the present embodiment will be described. The operation of the fixing device 20 and the X-ray Talbot imaging device 1 according to this embodiment will also be described.

  The fixing device 20 is used by being mounted on or fixed to the subject table 13 of the X-ray Talbot imaging device 1. It is also possible to form the fixing device 20 integrally with the subject table 13. The fixing device 20 is a device for fixing the position and angle of the joint portion of the patient's elbow that is the subject H with respect to the X-rays irradiated from the X-ray generation device 11 on the subject table 13.

  Hereinafter, the case of the X-ray Talbot imaging apparatus 1 having the configuration shown in FIG. 3 will be described. As described above, the subject H (joint portion of the patient's elbow in this embodiment) is represented by the G1 grid 14 and the G2 grid. 15 is also possible. Further, the X-ray Talbot imaging apparatus 1 can be configured as a so-called horizontal type (see FIG. 1). In those cases, the fixing device is configured to place the subject H at a predetermined position in the X-ray Talbot imaging device 1 and fix the subject H at that position.

  4 is a perspective view showing the fixing device according to the present embodiment, FIG. 5 is a side view, and FIG. 6 is a plan view. In the present embodiment, as will be described later, the forearm fixing unit 23 includes a handle 23d, and the forearm B of the subject H is fixed when the patient who is the subject H holds the handle 23d. However, FIG. 4 shows a case where the handle 23d is gripped from above, and FIG. 6 shows a case where the handle 23d is gripped from below.

  As shown in FIGS. 4 to 6 (hereinafter referred to as FIG. 4 and the like), the fixing device 20 is an upper arm fixing unit that fixes the upper arm A that is the trunk side of the joint portion of the elbow E that is an imaging target (imaging site). 22 and a forearm fixing portion 23 that fixes the forearm B that is the distal side of the joint portion of the elbow E, and further includes a base portion 21 that supports the upper arm fixing portion 22 and the forearm fixing portion 23. .

  In the present embodiment, the position of the joint portion of the patient's elbow E fixed to the fixing device 20 (see FIG. 4 and the like) is the X-ray light emitted from the X-ray generator 11 (see FIG. 3 and the like). The base unit 21 is moved on the subject table 13 (see FIG. 4) so as to be positioned on the axis center Ca, and the entire fixing device 20 is moved. Then, the fixing device 20 is positioned by fixing the base portion 21 to the subject table 13. Further, for example, the base unit 21 (that is, the entire fixing device 20) can be moved to an appropriate position in the x and y directions in the drawing by a moving device (not shown).

  The base portion 21 is provided with an opening portion 21a at a predetermined position. In the fixing device 20, each member is arranged so that the elbow E is located at a substantially central position in the opening portion 21a. In each part of the base portion 21 on both sides in the y direction in the drawing of the opening 21a, plate-like support members 24 extend upward through the rotation shaft 24a and extend in the y direction in the drawing. It is arranged. The rotation of the support member 24 around the rotation shaft 24a will be described later.

  In the present embodiment, the upper arm fixing part 22 and the forearm fixing part 23 include arm parts 22 a and 23 a, respectively, and the arm parts 22 a and 23 a are the upper arm A and the forearm of the subject H fixed to the fixing device 20. They are arranged on the sides of B (that is, in the y direction in the figure). That is, the arm portions 22 a and 22 a of the upper arm fixing portion 22 are arranged substantially parallel to the side of the upper arm A, and the arm portions 23 a and 23 a of the forearm fixing portion 23 are arranged substantially parallel to the side of the forearm B.

  The arm portion 22a of the upper arm fixing portion 22 and the arm portion 23a of the forearm fixing portion 23 are connected to each other at the hinge portion 26 on the side of the joint portion of the elbow E so as to be rotatable. An attachment member 27 is attached to each hinge portion 26 coaxially with the hinge portion 26, and each attachment member 27 is attached to the support member 24 of the base portion 21 described above. The structure of this part will be described later. Further, the bending angle α in FIG. 5 will be described later.

  In the fixing device 20 according to the present embodiment, the attachment member 27 is attached to the support member 24 erected from the base portion 21 and supported by the support member 24 as described above. 27, the hinge part 26, the upper arm fixing part 22, and the forearm fixing part 23 (that is, the entire structure above the base part 21) are supported by the base part 21.

  Although not shown in FIG. 4 and the like, a G1 grating 14, a G2 grating 15, an X-ray detector 16 (see FIG. 3) and the like are arranged below the opening 21 a of the base portion 21 of the fixing device 20. ing. When the upper arm A and the forearm B of the subject H are fixed by the upper arm fixing portion 22 and the forearm fixing portion 23 by the fixing device 20, respectively (that is, when the arm portions A and B of the subject H are fixed by the fixing device 20). As the joint part of the elbow E, which is the subject of photography, is brought closer to the lower G1 lattice 14, a clearer image can be taken.

  Therefore, in the present embodiment, as shown in FIG. 5, the arm portions A and B of the subject H are fixed by the fixing device 20 in a state where the lower end of the joint portion of the elbow E is positioned below the base portion 21. ing. In addition, it is better to make the joint part of the elbow E as close as possible to the G1 lattice 14 in this way, but in order to prevent the joint part of the elbow E from touching the G1 lattice 14 or a cover (not shown) that protects it, The position (including the height from the G1 grid 14 and the cover, etc .; the same applies hereinafter) is adjusted as appropriate. It is also possible to arrange so that the joint portion of the elbow E does not protrude below the base portion 21.

  For example, as shown in FIG. 7, the joint portion of the elbow E is placed on the lower side at a substantially central position (that is, a position where the joint portion of the elbow E is disposed) in the opening 21 a of the base portion 21 of the fixing device 20. It is also possible to provide an elbow position fixing member 25 for supporting and fixing the position from the position. The elbow position fixing member 25 is formed of, for example, a resin that is difficult to appear in an X-ray image.

  If comprised in this way, by inserting the joint part of the elbow E in the elbow position fixing member 25, the position of the elbow E will be fixed and the position of the joint part of the elbow E will be stabilized. Then, in this state, by fixing the arm portions A and B of the subject H with the fixing device 20, the patient's arm portions A and B including the joint portion of the elbow E can be stably fixed by the fixing device 20. Is possible.

  In FIG. 7, descriptions of the upper arm fixing portion 22 and the forearm fixing portion 23 of the fixing device 20, a hinge portion 26 and an attachment member 27, which will be described later, are omitted. Further, FIG. 7 shows the case where the elbow position fixing member 25 is formed in an elliptical shape. However, the present invention is not limited to this. For example, the elbow position fixing member 25 may be formed in a rectangular shape or the like. Any shape may be used as long as the shape can be supported and fixed from the side.

  Next, the structure of the upper arm fixing | fixed part 22 and the forearm fixing | fixed part 23 in the fixing device 20 which concerns on this embodiment is demonstrated.

[Upper arm fixing part]
In the present embodiment, the upper arm fixing portion 22 includes the two arm portions 22a and 22a as described above, and each of the arm portions 22a and 22a is connected above the upper arm A of the subject H by the connection portion 22b. ing. The upper arm fixing unit 22 includes a first fixing tool 22c and a second fixing tool 22d that fix the upper arm A of the subject H so as to be sandwiched from the side (ie, the y direction in the figure).

  In the present embodiment, the first fixing member 22c is formed integrally with the arm portion 22a on one side, and a cushion 22e is provided on the inner portion that contacts the upper arm A of the subject H. Further, in the present embodiment, as shown in FIG. 8, the second fixture 22d is configured to be slidable in the y direction in the figure with respect to the first fixture 22c, and the second fixture 22d is slid. Thus, the upper arm A of the subject H is fixed by being sandwiched from the side by the first fixing tool 22c and the second fixing tool 22d.

  With this configuration, the upper arm of the subject H is accurately prevented without causing pain to the patient who is the subject H, and the position of the patient's upper arm A is laterally moved (that is, in the y direction in the figure). It becomes possible to fix A accurately. Then, by preventing the patient's upper arm A from moving sideways, the joint portion of the elbow E, which is the object to be imaged, is prevented from moving laterally (that is, in the y direction in the figure). .

  In addition, it is also possible to comprise so that a cushion may be provided also in the inner part of the 2nd fixing tool 22d. Although not shown, in addition to the above configuration, for example, the upper arm of the subject H is fastened to the arm portion 22a by fastening the upper arm A of the subject H with a belt or the like provided on the upper arm fixing portion 22. It is also possible to configure so that A is fixed.

  4 and the like show a case where the right arm of the patient is fixed by the fixing device 20, and the fixing device 20 can be used to fix the left arm of the patient. Further, for example, a fixing device 20 having a mirror image structure of the fixing device 20 shown in FIG. 4 is formed as the fixing device 20 for the patient's left arm, and the joint portion of the elbow E of the patient's right arm is photographed. It is also possible to configure so that the fixing device 20 is properly used depending on the case of photographing the joint portion of the elbow E.

[Forearm fixing part]
In the present embodiment, the forearm fixing portion 23 includes the two arm portions 23a and 23a as described above, and the finger side of the subject H of each arm portion 23a and 23a is connected by the outer fixing member 23b. . The outer fixing tool 23b is formed in a substantially semi-cylindrical shape curved downward. And the inner side fixing tool 23c is engage | inserted by the inner surface side of the outer side fixing tool 23b, and the inner side fixing tool 23c is also formed in the substantially semi-cylindrical shape curved downward.

  In this embodiment, the rod-like handle 23d is fixed so as to be bridged inside the inner fixture 23c. Then, when the patient who is the subject H holds the handle 23d, the forearm B of the subject H is fixed.

  Moreover, in this embodiment, the inner side fixing tool 23c is formed so that sliding is possible along the inner surface of the outer side fixing tool 23b. Therefore, in the present embodiment, the inner fixing tool 23c can be rotated along the inner surface of the outer fixing tool 23b by twisting the forearm B while the patient who is the subject H holds the handle 23d. ing. This point will be described later.

  Further, since the inner fixing tool 23c is slidable along the inner surface of the outer fixing tool 23b, the handle 23d is extended in the extending direction of the arm portion 23a (that is, the extending direction of the forearm B of the subject H. FIG. The position of the handle 23d in the extending direction of the forearm B of the subject H (that is, the distance from the hinge portion 26) by sliding the inner fixture 23c relative to the outer fixture 23b by pushing or pulling in the x direction). ) Can be changed.

  Therefore, for example, the length of the forearm B changes depending on whether the patient is a woman or a child or an adult male, but the handle is adapted to the patient's physique (ie, the length of the forearm B). The position of 23d can be changed, and the forearm B of the subject H can be accurately fixed without the patient who is the subject H feeling painful or uncomfortable.

  In the present embodiment, as described above, the patient who is the subject H can also grasp the handle 23d from above (that is, with the palm facing down) (see FIG. 4). It is also possible to grip from (i.e. with the palm facing up) (see FIG. 6).

  In addition, when the patient grips the handle 23d, the upper arm A and the forearm B are bent and stretched at the joint portion of the elbow E, which will be described later, when the wrist is held straight and when the wrist is bent. The angle α may change. Therefore, as shown in FIG. 9, a glove-shaped holder 23f for fixing the wrist so that the wrist of the subject H is not bent is provided, for example, by providing a member having high rigidity such as metal or resin. It is possible to configure so that the patient holds the handle 23d in a state in which the patient wears the holder 23f on the hand and the wrist is fixed (that is, the wrist is not bent).

  If comprised in this way, when a patient hold | grips the handle 23d with the glove-shaped holding | maintenance tool 23f, it will be hold | gripped in the state which straightened the wrist, Therefore That said bending-extension angle (alpha) will change. It becomes possible to prevent accurately.

  Further, in the present embodiment, the fixing device 20 includes a forearm support portion 23e that stands from the base portion 21 and supports the forearm fixing portion 23 from below. Then, by adjusting the height of the forearm support portion 23e, the distance between the forearm fixing portion 23 and the base portion 21 (that is, the height from the base portion 21 of the outer fixing tool 23b of the forearm fixing portion 23) is adjusted. Can be done. The adjustment of the bending / extension angle α using the forearm support portion 23e will be described later.

[Bending and bending angle adjustment mechanism]
Next, the bending / extension angle adjusting mechanism of the fixing device 20 according to the present embodiment will be described.

  In the present embodiment, as described above, the arm portion 22a of the upper arm fixing portion 22 and the arm portion 23a of the forearm fixing portion 23 are connected to each other by the hinge portion 26 so as to be rotatable. The hinge portion 26 is provided with a screw (not shown). By loosening the screw, an angle α between the arm portion 22a of the upper arm fixing portion 22 and the arm portion 23a of the forearm fixing portion 23 (see FIG. 5). ) That is, a change in the flexion / extension angle α between the upper arm A and the forearm B at the joint portion of the elbow E is allowed, and the change in the flexion / extension angle α is prohibited by tightening a screw (that is, the flexion / extension angle α is fixed). To be).

  Thus, in this embodiment, each hinge part 26 provided in the side of the joint part of the elbow E can adjust the bending / extension angle that can adjust the bending / extension angle α between the upper arm A and the forearm B in the joint part of the elbow E. It functions as a mechanism. The bending / extension angle adjusting mechanism (such as the hinge portion 26) adjusts the angle α (see FIG. 5) between the arm portion 22a of the upper arm fixing portion 22 and the arm portion 23a of the forearm fixing portion 23 as described above. Thus, the bending / extension angle α between the upper arm A and the forearm B at the joint portion of the elbow E can be adjusted.

  It should be noted that the hinge portion 26 can be pivoted (that is, the upper arm fixing portion 22) by engaging with the hinge portion 26 to release the lock instead of or together with a screw for tightening the hinge portion 26. It is also possible to provide a stopper or the like that allows or prohibits the relative rotation of the arm portion 22a and the arm portion 23a of the forearm fixing portion 23. As described above, it is not always necessary to use a screw, a stopper, or the like as long as the pivoting operation of the hinge portion 26 can be permitted or prohibited.

  Further, as described above, in the present embodiment, the fixing device 20 is provided with the forearm support portion 23e. For example, when the bending angle α (that is, the angle α formed by the arm portion 22a of the upper arm fixing portion 22 and the arm portion 23a of the forearm fixing portion 23) is changed while allowing the pivoting operation of the hinge portion 26 as described above. In addition, for example, when the bending / extension angle α is adjusted by raising or lowering the forearm fixing portion 23 with the forearm support portion 23e, the forearm support portion 23e also functions as the bending / extension angle adjusting mechanism in the present invention. .

  Then, after adjusting the bending / extension angle α and determining the bending / extension angle α in this way, the bending motion of the upper arm A and the forearm B at the joint portion of the elbow E is prohibited by prohibiting the rotation of the hinge portion 26. α is fixed. In this embodiment, the upper arm A side of the subject H is not particularly provided with a member or the like that supports the upper arm fixing portion 22 or the like from the lower side. However, such a support member or the like is provided. Is also possible.

  As described above, by providing the bending device with the bending / extension angle adjusting mechanism (such as the hinge portion 26) in the fixing device 20, the bending / extension angle α between the upper arm A and the forearm B at the joint portion of the elbow E can be adjusted appropriately and accurately. It becomes. Therefore, when viewed from the X-ray generator 11 (see FIG. 1 and FIG. 3) side of the X-ray Talbot imaging apparatus 1, the cartilage to be imaged, the loose joint in the joint, and the like, for example, are shown in FIG. As shown in (A) and (B), it is possible to accurately prevent the imaging from being overlapped with the bone, and cartilage and joints in the reconstructed image such as the moire image Mo and the differential phase image generated based on the moire image Mo. It becomes possible to photograph the inner free body accurately.

  And in the fixing device 20 provided with such a bending / extension angle adjusting mechanism, it is possible to accurately adjust the bending / extension angle α of the joint portion of the elbow E so that the cartilage, the loose body in the joint, etc. can be accurately photographed. In addition, the joint portion of the elbow E can be accurately fixed so that the adjusted bending / extension angle α is maintained.

  Further, as in the present embodiment, the angle between the upper arm fixing part 22 (arm part 22a) and the forearm fixing part 23 (arm part 23a) is adjusted by the bending / extension angle adjusting mechanism, so that the joint part of the elbow E is adjusted. By configuring so that the bending / extension angle α between the upper arm A and the forearm B can be adjusted, the bending / extension angle α can be easily and accurately adjusted accurately.

  It should be noted that the hinge portion 26 is graduated, and for example, the radiographer or other photographer adjusts and fixes the bending angle α fixed as described above and records it as a record. Is also possible. Further, the fixing device 20 and the X-ray Talbot imaging device 1 may be configured to automatically measure and record the bending / extension angle α in the hinge portion 26.

[Inclination angle adjustment mechanism]
Next, the tilt angle adjusting mechanism of the fixing device 20 according to the present embodiment will be described.

  In the fixing device 20 according to the present embodiment, only the bending angle α (see FIG. 5, that is, the angle formed by the upper arm A and the forearm B in the motion of making a bicep) at the joint portion of the elbow E of the subject H. Instead, the inclination angle β with respect to the X-ray irradiation direction (z direction in the figure) of the upper arm A and the forearm B as shown in FIG. 10 can be adjusted and fixed.

  As shown in FIG. 10, the inclination angle β is an angle with respect to the X-ray irradiation direction (z direction) of the virtual plane P including the upper arm A and the forearm B at the joint portion of the elbow E of the subject H. Although defined as β, hereinafter, in order to simplify the description, the inclination angle β with respect to the X-ray irradiation direction of the upper arm A and the forearm B, or the above-described inclination angle β. In FIG. 10, since the virtual plane P is viewed from the side, the virtual plane P is shown in a straight line.

  Hereinafter, a tilt angle adjusting mechanism for adjusting the tilt angle β will be described. FIG. 10 shows the case where the upper arm A and the forearm B are inclined inward (that is, the left arm in the case of the right arm shown in FIG. 10), but the upper arm A and the forearm B are outward (that is, In the above example, it is also possible to incline (in the direction away from the left arm side).

  In the present embodiment, the tilt angle adjusting mechanism is coaxial with the support member 24 attached to the base portion 21 via the rotating shaft 24a and the hinge portion 26 in the vicinity of the opening portion 21a of the base portion 21 as described above. It is comprised by the attached attachment member 27 (refer FIG. 4 etc.) etc. This will be specifically described below.

  FIG. 11A is a front view illustrating a configuration example of the tilt angle adjusting mechanism according to the present embodiment, and is a view of the hinge portion 26 and the like as viewed from the forearm fixing portion 22 (see FIG. 4 and the like). . FIG. 11A shows a state in which the support member 24 extends in the vertical direction (that is, the z direction in the drawing) with respect to the base portion 21 via the rotation shaft 24a.

  In this embodiment, as shown in FIG. 11A, each attachment member 27 is provided with an arcuate linear hole 27a. And the hole 27a of the attachment member 27 is formed so that it may extend in the direction along the periphery of the circle | round | yen C centering on the intermediate point O of each hinge part 26. As shown in FIG. And the protrusion 24b erected from each support member 24 is inserted in the hole 27a of each attachment member 27, respectively.

  Therefore, each attachment member 27 and each hinge part 26 can be rotated around the above-mentioned intermediate point O with respect to each support member 24, so that the upper arm A and the forearm as shown in FIG. By inclining B, each attachment member 27 and each hinge part 26 can be appropriately rotated with respect to each support member 24 at a predetermined rotation angle β1.

  In this case as well, it is possible to provide a stopper or the like on the attachment member 27, the support member 24, or the like so as to allow or prohibit the rotation of the attachment member 27 relative to the support member 24.

  In the present embodiment, since the support member 24 is attached to the base portion 21 via the rotation shaft 24a, as shown in the side view of FIG. 11B, the support member 24 is moved to the rotation shaft 24a. The support member 24 can be tilted with respect to the base portion 21 by rotating around the center. FIG. 11B is a side view showing a part of a configuration example of the tilt angle adjusting mechanism according to the present embodiment.

  Then, as described above, the support member 24 is tilted with respect to the base portion 21, so that the mounting member 27 attached to the support member 24 remains in parallel with the support member 24 together with the support member 24. Can be inclined with respect to. When the mounting member 27 is inclined in this way, the hinge portion 26, the intermediate point O, the circle C, and the like are also inclined with respect to the base portion 21.

  That is, as shown in FIG. 11B, when the second virtual plane Q extending in the surface direction of the mounting member 27 is considered, the support member 24 and the mounting member 27 are inclined with respect to the base portion 21. Thus, the second virtual plane Q is also inclined with respect to the base portion 21. Since the hinge part 26, the intermediate point O, the circle C and the like are on the second virtual plane Q, the support member 24 is inclined with respect to the base part 21 in this way, and the attachment member 27 is inclined. Thus, the hinge portion 26, the intermediate point O, the circle C, and the like can be inclined with respect to the base portion 21.

  Thus, in the inclination angle adjustment mechanism (that is, the attachment member 27, the support member 24, the rotation shaft 24a, etc.) of the fixing device 20 according to the present embodiment, by changing the angle of the support member 24 with respect to the base portion 21, An angle β2 (see FIG. 11B) with respect to the base portion 21 of the second virtual plane Q can be changed. Further, in this state, in the second virtual plane Q, as shown in FIG. 11A, the mounting members 27 and the hinge portions 26 are rotated with respect to the support members 24 by the rotation angle β1. be able to.

  In the tilt angle adjusting mechanism according to the present embodiment, the hinge portions 26 arranged on the sides of the joint portion of the elbow E are thus made to have a predetermined angle β2 with respect to the base portion 21 of the fixing device 20. By rotating the second imaginary plane Q by the rotation angle β1, the inclination angle β (see FIG. 10) with respect to the X-ray irradiation direction of the upper arm A and the forearm B at the joint portion of the elbow E is appropriately adjusted. Be able to.

  Also in this case, a stopper or the like is provided on the support member 24, the rotation shaft 24a, etc., and the rotation of the support member 24 around the rotation shaft 24a (that is, the inclination of the support member 24, etc.) is permitted or prohibited. It can be configured as follows.

  And by providing such an inclination angle adjusting mechanism, the inclination angle β (see FIG. 10) with respect to the X-ray irradiation direction of the upper arm A and the forearm B at the joint portion of the elbow E can be adjusted appropriately and accurately. Is possible. Therefore, when viewed from the X-ray generator 11 (see FIG. 1 and FIG. 3) side of the X-ray Talbot imaging apparatus 1, the cartilage to be imaged, the loose joint in the joint, and the like, for example, are shown in FIG. As shown in (A) and (B), the cartilage is accurately prevented from being overlapped with the bone and cannot be photographed, and the cartilage is accurately included in the reconstructed image such as the moire image Mo or the differential phase image generated based thereon. It is possible to photograph a free body in a joint and the like.

  And in the fixing device 20 provided with such an inclination angle adjusting mechanism, X-ray irradiation of the upper arm A and the forearm B at the joint portion of the elbow E so that cartilage, a loose body in the joint, and the like can be accurately photographed as such. It is possible to accurately adjust the inclination angle β with respect to the direction, and it is possible to accurately fix the joint portion of the elbow E so that the adjusted inclination angle β is maintained.

  In this case as well, for example, the portion near the hole 27a of the mounting member 27 is graduated, and for example, the inclination angle β adjusted and fixed by the radiographer or other photographer as described above is used. It is also possible to make a note and record it as a record. Further, the fixing device 20 and the X-ray Talbot imaging device 1 may be configured to automatically measure and record the inclination angle β. Alternatively, the rotation angle β1 and the angle β2 may be noted instead of the inclination angle β, or may be configured to be automatically measured and recorded.

  Moreover, in this embodiment, as shown to FIG. 11 (A), it forms so that the space | interval of the holes 27a of each attachment member 27 is narrow on the upper side, and it spreads as it goes below. Therefore, even if the arm portions A and B (including the joint portion of the elbow E) of the subject H are fixed to the fixing device 20 and a downward load is applied to the hinge portion 26 and the mounting member 27, the mounting member 27 remains the support member. Therefore, the height of the hinge portion 26 and the mounting member 27 relative to the support member 24 and the base portion 21 is appropriately maintained.

  Further, FIG. 11A shows a case where the joint portion of the elbow E of the subject H is formed above the base portion 21 of the fixing device 20 in order to make the drawing easy to see. However, as described above, the lower end of the joint portion of the elbow E can be arranged in a state of being located below the base portion 21 (see FIG. 5). And in this embodiment, the position of the joint part of elbow E is set by setting the attachment position (height) to each support member 24 of each attachment member 27 shown to FIG. 11 (A) to appropriate height. (Height) can be arranged at an appropriate position.

[effect]
As described above, according to the fixing device 20 and the X-ray Talbot imaging device 1 according to the present embodiment, the upper arm A of the patient H as the subject H is fixed by the upper arm fixing unit 22, and the forearm B is fixed by the forearm fixing unit 23. Thus, the forearm fixing portion and the arm portions A and B including the joint portion of the patient's elbow E are accurately fixed by the fixing device 20.

  Then, the position of the base portion 21 of the fixing device 20 with respect to the subject table 13 of the X-ray Talbot imaging device 1 is determined, and the upper arm A and the forearm B at the joint portion of the elbow E of the subject H by the bending / extension angle adjusting mechanism (such as the hinge portion 26). The X-ray of the upper arm A and the forearm B at the joint portion of the elbow E of the subject H is adjusted by the tilt angle adjustment mechanism (the support member 24, the rotation shaft 24a, the mounting member 27, etc.). The inclination angle β with respect to the irradiation direction (more precisely, the angle β with respect to the X-ray irradiation direction (z direction) of the virtual plane P including the upper arm A and the forearm B at the joint portion of the elbow E of the subject H) is appropriately adjusted. It becomes possible.

  Then, by appropriately adjusting the tilt angle β, the position and angle of the joint portion of the elbow E, in particular, X-rays emitted from the X-ray generator 11 (see FIG. 3 and the like) of the X-ray Talbot imaging device 1. The position and angle of the joint part of the elbow E with respect to the optical axis center Ca (ie, the bending angle α and the inclination angle β) can be accurately adjusted, and the position and angle of the joint part of the elbow E can be accurately maintained. As described above, the joint portion of the elbow E can be accurately fixed.

  For example, in the conventional elbow joint fixing device disclosed in Patent Document 2 or the like, only the bending / extension angle α of the joint portion of the elbow E can be adjusted. However, in this embodiment, the joint of the elbow E of the subject H is further adjusted. It is possible to appropriately adjust and fix the inclination angle β with respect to the X-ray irradiation direction of the upper arm A and the forearm B in the portion.

  As described above, in the fixing device 20 and the X-ray Talbot imaging device 1 according to the present embodiment, not only the bending / extension angle α but also the inclination angle β can be accurately adjusted and fixed. When viewed from the X-ray generation device 11 side of the Talbot imaging device 1, the cartilage to be imaged, the loose joints in the joint, and the like in the joint portion of the elbow E are, for example, as shown in FIGS. It is possible to accurately prevent the image from being overlapped with the bone and not being able to be imaged, and to accurately image cartilage, loose joints, etc. in the reconstructed image such as the moire image Mo and the differential phase image generated based on it. Become.

[Torsion angle adjustment mechanism]
In the present embodiment, the fixing device 20 further includes a torsion angle adjusting mechanism capable of adjusting the torsion angle γ of the forearm B of the subject H (see FIG. 12, that is, the torsion angle γ centering on the extending direction of the forearm B). I have.

  As shown in FIG. 4 and the like, in the present embodiment, the forearm fixing portion 23 includes an outer fixing tool 23b formed in a substantially semi-cylindrical shape curved downward, and an inner fixing that is slidable along the inner surface thereof. And a rod-like handle 23d is fixed so as to be bridged inside the inner fixture 23c. In the present embodiment, a torsion angle adjusting mechanism is configured by the outer fixing tool 23b, the inner fixing tool 23c, the handle 23d, and the like of the forearm fixing portion 23.

  That is, as described above, in a state where the patient who is the subject H holds the handle 23d, the inner arm 23c is rotated along the inner surface of the outer fastener 23b by twisting the forearm B so as to twist the wrist. Move. Therefore, in this embodiment, the patient himself or herself twists the forearm B while holding the handle 23d, or the radiographer or other photographer uses the handle 23d or the inner fixture 23c held by the patient as the outer fixture 23b. The torsion angle γ of the forearm B can be adjusted appropriately by twisting the patient's forearm B and rotating the patient's forearm B.

  In this case as well, a stopper or the like is provided on the outer fixing tool 23b, the inner fixing tool 23c, etc., and the rotation (sliding) of the inner fixing tool 23c relative to the outer fixing tool 23b is allowed or prohibited. It is possible.

  Thus, by providing the torsion angle adjustment mechanism (the outer fixing tool 23b, the inner fixing tool 23c, and the handle 23d), the torsion angle γ of the patient's forearm B that is the subject H can be adjusted appropriately and accurately. It becomes.

Then, by rotating the handle 23d in the direction of twisting the forearm B and adjusting the twist angle γ of the forearm B, the twist angle γ ^{* at} the joint portion of the elbow E of the subject H holding the handle 23d (see FIG. 12). Slightly changes in the same direction. Therefore, in the torsion angle adjusting mechanism, the torsion angle γ ^{* at} the joint portion of the elbow E can be adjusted appropriately and accurately by adjusting the torsion angle γ of the forearm B appropriately and accurately as described above. Is possible.

Note that, as described above, by changing the torsion angle γ ^* at the joint portion of the elbow E, the position of the soft tissue to be imaged such as cartilage or tendon at the joint portion of the elbow E changes. Therefore, as an actual adjustment method, for example, the bending / extension angle α between the upper arm A and the forearm B in the joint portion of the elbow E and the X-ray irradiation direction (z direction) of the upper arm A and the forearm B as described above. After adjusting the inclination angle β with respect to, the torsion angle γ ^* is finely adjusted as described above. And by adjusting in this way, it becomes possible to irradiate the soft tissue which is the imaging target with X-rays from an appropriate angle and accurately image the soft tissue.

On the other hand, the torsion angle γ ^* of the forearm B at the joint portion of the elbow E is also changed depending on whether the patient H as the subject H holds the handle 23d from the upper side (see FIG. 4) or the lower side (see FIG. 6). Can do.

Therefore, if the torsion angle adjustment mechanism is provided as described above, the bending angle of the upper arm A and the forearm B in the joint portion of the elbow E in the above embodiment, and the X-ray irradiation direction of the upper arm A and the forearm B In addition to the inclination angle β with respect to the (z direction), the torsion angle γ of the forearm B (the torsion angle γ ^{* at} the joint part of the elbow E) can be adjusted. It becomes possible to adjust and fix the position, angle, direction, and the like with respect to the X-ray irradiation direction (that is, the X-ray optical axis center Ca (see FIG. 3)) more accurately.

  Therefore, when viewed from the X-ray generator 11 (see FIG. 1 and FIG. 3) side of the X-ray Talbot imaging apparatus 1, the cartilage to be imaged, the loose joint in the joint, and the like, for example, are shown in FIG. As shown in (A) and (B), the cartilage is accurately prevented from being overlapped with the bone and cannot be photographed, and the cartilage is accurately included in the reconstructed image such as the moire image Mo or the differential phase image generated based thereon. It is possible to photograph a free body in a joint and the like.

If a stopper or the like is provided in the torsion angle adjusting mechanism as described above, the torsion angle γ of the forearm B or the torsion at the joint portion of the elbow E can be accurately photographed as described above. In a state in which the angle γ ^* is accurately adjusted, the joint portion of the elbow E can be accurately fixed so that the torsion angles γ and γ ^* are maintained.

  The outer fixing tool 23b and the inner fixing tool 23c are scaled, and the photographer takes note of the torsion angle γ of the forearm adjusted and fixed as described above, for example, and keeps it as a record. It is also possible to configure. Further, the fixing device 20 and the X-ray Talbot imaging device 1 can be configured to automatically measure and record the torsion angle γ of the forearm B described above.

  In the embodiment and the torsion angle adjusting mechanism, as described above, the bending angle of the upper arm A and the forearm B in the joint portion of the elbow E of the subject H (see FIG. 5), the upper arm A and the forearm B It is possible to record the inclination angle β (see FIG. 10) with respect to the X-ray irradiation direction (z direction) or the torsion angle γ (see FIG. 12) of the forearm B.

  And if comprised in this way, when fixing the patient's arm part A and B to the fixing device 20 at the time of the next imaging | photography with respect to the same patient, the bending / extension angle (alpha), inclination | tilt angle (beta), twist angle (gamma) which were adjusted at the last imaging | photography. It is possible to adjust the angle or the like using the information. Therefore, it is possible to reproduce and adjust the same angle and position as in the previous shooting. In addition, the angle and position of the fixing device 20 can be adjusted quickly, and imaging can be performed quickly without waiting for the patient.

  In the above-described embodiment and the like, the case where the support member 24 is configured to be rotatable with respect to the base portion 21 via the rotation shaft 24a has been described. Instead of such a configuration, for example, the support member 24 is provided. Can be configured to be fixed to the base portion 21 while standing from the base portion 21 (that is, in this case, the support member 24 does not rotate with respect to the base portion 21).

  Moreover, it goes without saying that the present invention is not limited to the above-described embodiment and the like, and can be appropriately changed without departing from the gist of the present invention.

1 X-ray Talbot imaging device 11 X-ray generator 12 G0 lattice (lattice)
13 Subject table 14 G1 grating (phase grating)
15 G2 lattice (lattice)
16 X-ray detector 20 Fixing device 21 Base part 22 Upper arm fixing part 22c First fixing tool (fixing tool)
22d Second fixture (fixture)
23 Forearm fixing part 23b Outer fixing tool (torsion angle adjustment mechanism)
23c Inner fixture (torsion angle adjustment mechanism)
23d Handle (torsion angle adjustment mechanism)
23e Forearm support (bending / extension adjusting mechanism)
23f Holder 24 Support member (tilt angle adjustment mechanism)
24a Rotating shaft (tilt angle adjustment mechanism)
25 Elbow position fixing member 26 Hinge part (bending and stretching angle adjusting mechanism)
27 Mounting member (tilt angle adjustment mechanism)
A Upper arm B Forearm Ca X-ray optical axis center (X-ray irradiation direction)
E Elbow H Subject Mo Moire image P Virtual plane Q Second virtual plane α Bend and extension angle of upper arm and forearm, angle β Inclination angle β2 with respect to X-ray irradiation direction of virtual plane including upper arm and forearm Predetermined angle γ Forearm torsion angle γ ^* Torsion angle at the elbow joint of the subject

Claims (12)

An upper arm fixing part for fixing the upper arm of the subject;
A forearm fixing part for fixing the forearm of the subject;
A bending / extension angle adjusting mechanism capable of adjusting a bending / extension angle between the upper arm and the forearm in a joint part of an elbow of a subject;
An inclination angle adjusting mechanism capable of adjusting an inclination angle with respect to an X-ray irradiation direction of an imaginary plane including the upper arm and the forearm in the joint portion of the elbow of a subject;
A fixing device comprising:   The fixing device according to claim 1, further comprising an elbow position fixing member for supporting and fixing the joint portion of the elbow from below. The forearm fixing portion includes a handle,
The fixing device according to claim 1, wherein the forearm of the subject is fixed when the subject grips the handle.   The fixing device according to claim 3, wherein the position of the handle can be changed in the extending direction of the forearm of the subject.   The fixing device according to any one of claims 1 to 4, further comprising a holder for fixing a wrist of a subject.   The said upper arm fixing | fixed part fixes the said upper arm so that it may pinch | interpose from a side with two fixing tools, The fixing device as described in any one of Claims 1-5 characterized by the above-mentioned. A base portion for supporting the upper arm fixing portion and the forearm fixing portion;
The tilt angle adjustment mechanism connects the upper arm fixing portion and the forearm fixing portion to each other so as to be rotatable, and a hinge portion positioned on the side of the joint portion of the elbow is set at a predetermined angle with respect to the base portion. The fixing device according to any one of claims 1 to 6, wherein the fixing device is configured to be able to adjust the inclination angle by being rotated in a second virtual plane having the same. .   The bending / extension angle adjusting mechanism can adjust the bending / extension angle between the upper arm and the forearm in the joint portion of the elbow of the subject by adjusting an angle between the upper arm fixing portion and the forearm fixing portion. It is comprised like this, The fixing device as described in any one of Claims 1-7 characterized by the above-mentioned. A base portion for supporting the upper arm fixing portion and the forearm fixing portion;
The fixing device according to claim 8, wherein the bending / extension angle adjusting mechanism is configured to adjust at least a distance between the forearm fixing portion and the base portion.   The fixing device according to any one of claims 1 to 9, further comprising a torsion angle adjusting mechanism capable of adjusting a torsion angle of the forearm of the subject. The torsion angle adjusting mechanism is
The forearm fixing portion is configured to include a handle,
The handle is rotatable in the direction of twisting the forearm,
By rotating the handle in the direction and adjusting the torsion angle of the forearm of the subject, the torsion angle at the joint portion of the elbow of the subject holding the handle can be adjusted. The fixing device according to claim 10. A plurality of gratings including a phase grating;
A subject table for holding the subject;
An X-ray generator for irradiating the subject with X-rays;
An X-ray detector for taking a moire image;
With
A fixing device according to any one of claims 1 to 11 is provided on the subject table.
An X-ray Talbot imaging apparatus, wherein the fixing device fixes a position and an angle of an elbow joint portion of a subject with respect to an X-ray irradiation direction.