WO2010018617A1 - 放射線グリッドおよびそれを備えた放射線撮影装置 - Google Patents
放射線グリッドおよびそれを備えた放射線撮影装置 Download PDFInfo
- Publication number
- WO2010018617A1 WO2010018617A1 PCT/JP2008/064428 JP2008064428W WO2010018617A1 WO 2010018617 A1 WO2010018617 A1 WO 2010018617A1 JP 2008064428 W JP2008064428 W JP 2008064428W WO 2010018617 A1 WO2010018617 A1 WO 2010018617A1
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- WIPO (PCT)
- Prior art keywords
- radiation
- joining member
- absorbent
- grid
- foil
- Prior art date
Links
- 230000005855 radiation Effects 0.000 title claims description 99
- 238000003384 imaging method Methods 0.000 title description 15
- 239000011888 foil Substances 0.000 claims abstract description 180
- 238000005304 joining Methods 0.000 claims abstract description 137
- 230000002745 absorbent Effects 0.000 claims description 130
- 239000002250 absorbent Substances 0.000 claims description 130
- 239000006096 absorbing agent Substances 0.000 claims description 40
- 238000010521 absorption reaction Methods 0.000 claims description 37
- 238000009966 trimming Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000002601 radiography Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 63
- 230000001070 adhesive effect Effects 0.000 description 60
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 238000003780 insertion Methods 0.000 description 12
- 230000037431 insertion Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- 125000006850 spacer group Chemical group 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
- G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4291—Arrangements for detecting radiation specially adapted for radiation diagnosis the detector being combined with a grid or grating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/486—Diagnostic techniques involving generating temporal series of image data
- A61B6/487—Diagnostic techniques involving generating temporal series of image data involving fluoroscopy
Definitions
- the present invention relates to a radiation grid that removes scattered radiation, and more particularly to a radiation air grid that does not require a spacer in the gap between adjacent absorption nights.
- a radiation imaging apparatus that acquires a radiographic image of a subject is irradiated with a cone-shaped radiation beam from a radiation source toward the subject, and the radiation transmitted through the subject is a flat panel detector (hereinafter abbreviated as FPD).
- FPD flat panel detector
- a fluoroscopic image when the radiation passes through the subject, scattered radiation that enters the FPD after being scattered inside the subject is generated. This is a factor that deteriorates the contrast of the radioscopic image.
- a radiation grid may be provided to cover the radiation detection surface of the FPD.
- the conventional radiation grid 71 includes a strip-shaped absorbing foil 72 made of a molybdenum alloy or the like that easily absorbs radiation, and a spacer 73 that supports the strip and holds the shape linearly. I have. And the absorption foil 72 and the spacer 73 are arranged alternately, and form a plate-shaped absorber.
- the direct radiation that travels through the subject passes through the gap between the adjacent absorption foils 72 (more precisely, the spacer 73), but the scattered radiation enters the absorption foil 72, where Absorbed.
- the spacer 73 In order to obtain a clearer fluoroscopic image, it is desirable that the spacer 73 not directly disturb the progress of radiation be provided. Therefore, in recent years, a radiation air grid having a configuration in which the spacer 73 is omitted has been developed (for example, see Patent Document 1). A configuration of a conventional radiation air grid will be described. As shown in FIG. 21, the conventional radiation air grid 81 has a pair of sheet covers 85 and 86 that cover the absorber 84. Since the radiation air grid 81 does not have a spacer, each of the absorbing foils 82 is fixed by being adhered to the sheet covers 85 and 86.
- the absorbent foil 72 cannot be sufficiently supported only by the support by the seat covers 85 and 86, and the absorber 84 is mechanically fragile. Therefore, in the conventional radiation air grid, the mechanical strength of the absorber 84 is enhanced by allowing the adhesive 87 to permeate the side edges of the absorber 84.
- a plurality of absorbing foils 82 are arranged in parallel, and an adhesive 87 is applied so as to cover each of the ends of the absorbing foil 82 in a state where tension is applied to each of the absorbing foils 82. It is applied and the adhesive 87 is permeated into the gap between the adjacent absorbent foils 82.
- the conventional configuration has the following problems. That is, according to the conventional configuration, there is a problem that it is difficult to make the absorbent foil linear. When the adhesive 87 that has penetrated into the gaps of the absorbent foil 82 is cured, distortion occurs. Then, even if the absorbent foils 82 are arranged in parallel, as the adhesive 87 hardens, the absorbent foil 82 gradually becomes misaligned due to curing strain. Eventually, the arrangement of the absorbent foils 82 is disturbed by the curing strain. For example, the tension applied to the absorbent foils 82 is loosened, and the absorbent foils 82 meander or the absorbent foils 82 are J It is transformed into a mold.
- the absorbing foil 82 When such a radiation air grid is mounted on a radiation imaging apparatus, the absorbing foil 82 directly disturbs the progress of radiation, and a linear shadow appears in the radiographic image. This is because when the absorbing foil 82 is distorted, a wide shadow is projected onto the FPD. Therefore, in order to obtain a clearer fluoroscopic image, it is necessary to arrange the absorbing foils 82 in an orderly manner in a straight line.
- the adhesive 87 does not penetrate into the gap between the absorbent foils 82. This is because when the absorbent body 84 is covered with the seat covers 85 and 86 and both ends of the absorbent foil 82 are cut, the absorbent foil 82 is bent. In order to cut both ends of the absorbent foil 82, the round blade cutter is moved in the arrangement direction of the absorbent foil 82. However, the absorbent foil 82 is bent and deformed due to the shear stress received from the round blade cutter at that time. End up. This is because the adhesive 87 does not penetrate into the gap between the absorbent foils 82.
- the absorbing foil 82 extends to the end portion that does not enter the field of view, a molybdenum material necessary for constructing the radiation air grid becomes more necessary, resulting in high costs.
- the non-linearity of the absorbing foil 82 extends over the entire area of the absorbing foil 82, and thus the absorbing foil 82 is made linear by such a design change. Cannot be solved sufficiently. That is, the structure which suppresses distortion itself of the edge part of the absorption foil 82 is desired.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a radiation grid that does not obstruct the passage of radiation directly by orderly arranging absorption foils whose shapes are maintained in a straight line. There is to do.
- the present invention has the following configuration. That is, the radiation grid according to the present invention is configured by arranging the absorbing foil that absorbs strip-shaped radiation extending in the extending direction in an arrangement direction orthogonal to the extending direction, and an incident surface on which the radiation is incident.
- An absorber having an emission surface from which radiation is emitted, a first coating member that covers an incident surface of the absorber, or one surface of the emission surface, and a second coating member that covers another surface different from the one surface of the absorber;
- a first joining member that is disposed at a contact portion between each of the absorbent foils constituting the absorbent body and the first covering member and integrates both, and each of the absorbent foils constituting the absorbent body and the second covering member, And a second joining member that integrates the two, and a gap is provided between the first joining member and the second joining member, and the first joining member At both ends in the stretching direction
- Kicking thickness of the first joining member is characterized in that it is thicker than the thickness of the first joint member at the central portion sandwiched between the opposite ends.
- the radiation grid of the present invention has an absorber in which strip-shaped absorbent foils are arranged.
- the shape of this absorber is held by being integrated with the first covering member via the first bonding member and being integrated with the second covering member via the second bonding member. Since this 1st junction member and the 2nd junction part member are the structures which hardened the gel adhesive, they inherently produce a hardening distortion.
- the radiation grid of the present invention since the gap is provided between the first joining member and the second joining member, the curing strain generated when both the joining members are cured is suppressed as much as possible. be able to.
- the fact that the gap is provided in both the joining members means that the amount of the adhesive used for manufacturing the radiation grid is small by the gap. Therefore, the curing distortion does not occur as much as the adhesive is omitted.
- both ends of the absorption foil of the radiation grid according to the present invention are reliably supported. It is because the thickness of the 1st joining member in the both ends of the extending direction which the 1st joining member has is thicker than the thickness of the 1st joining member in the center part pinched by both ends. In order to make the absorbent foil straight and to arrange the absorbent foil in an orderly manner, it is necessary to reliably support both ends of the absorbent foil in the extending direction. Moreover, according to the structure of this invention, since the both ends of the extending
- the radiation grid of the present invention is configured to efficiently transmit direct radiation. This is because the thickness of the first joining member at the center of the first joining member is thin. When the shadow of the first joining member is reflected in the radiographic image of the subject, the visibility of the radiographic image is reduced accordingly. However, according to the configuration of the present invention, since the thickness of the first joining member at the central portion of the first joining member is suppressed as much as possible, the progress of direct radiation in which the radiographic image of the subject is reflected is 1 The connecting member is not disturbed.
- the thickness of the second joining member at both ends in the extending direction of the second joining member may be thicker than the thickness of the second joining member at the center portion sandwiched between the both ends. More desirable.
- the first joining members extend in the gaps between the absorbent foils adjacent to each other at both ends in the extending direction of the first joining member having the above-described configuration and connect the absorbent foils adjacent to each other.
- the second joining member extends in the gap between the absorbent foils adjacent to each other at both ends in the extending direction of the second joint member having the above-described configuration and connects the absorbent foils adjacent to each other.
- the radiation grid can be mounted on the radiation imaging apparatus. That is, a radiographic apparatus equipped with the radiation grid of the present invention includes a radiation source that irradiates a radiation beam, a radiation detection means that detects a radiation beam and forms a detection signal, and a radiation detection that detects the radiation of the radiation detection means.
- a radiation grid arranged so as to cover the surface, an image forming unit that forms an original image based on a detection signal, and a trimming unit that cuts off a predetermined region of the original image to form a radioscopic image.
- the predetermined region is preferably a region where shadows at both ends of the radiation grid are reflected.
- the original image is formed by the image forming means.
- the above configuration includes trimming means that cuts off both ends of the image to form a radioscopic image. Shadows at both ends of the first joining member are reflected in a predetermined area of the original image. If both end portions are thick, radiation will be absorbed more.
- the predetermined region in which the shadows at both ends of the first joining member are reflected is cut off to form a radioscopic image, so that the radiographic image finally obtained has Shadows at both ends of the first joining member are not reflected.
- the gap is provided between the first joining member and the second joining member, it is possible to suppress as much as possible the curing distortion that occurs when both the joining members are cured. it can.
- the fact that the gap is provided in both the joining members means that the amount of the adhesive used for manufacturing the radiation grid is small by the gap. Therefore, the curing distortion does not occur as much as the adhesive is omitted.
- the intensity of the radiation grid of the present invention is sufficient.
- the thicknesses of the first joining member and the second joining member at both ends in the extending direction of the first joining member and the second joining member are the first joining member and the second at the center part sandwiched between the both ends. This is because it is thicker than the thickness of the joining member.
- strength of a radiation grid is a high thing.
- the radiation grid of the present invention is configured to efficiently transmit direct radiation.
- the thicknesses of the first joining member and the second joining member at the center of the first joining member and the second joining member are thin. According to the configuration of the present invention, since the thickness of the first bonding member and the second bonding member in the central portion of the first bonding member and the second bonding member is suppressed as much as possible, the radioscopic image of the subject is obtained. The progress of the reflected direct radiation is not disturbed by the first joining member.
- FIG. 3 is a cross-sectional view illustrating a configuration of an X-ray grid according to Embodiment 1.
- FIG. 3 is a plan view illustrating the configuration of an X-ray grid according to Embodiment 1.
- FIG. 3 is a cross-sectional view illustrating the shape of a joining member according to Example 1.
- FIG. 3 is a cross-sectional view illustrating the shape of a joining member according to Example 1.
- FIG. 3 is a flowchart for explaining an X-ray grid manufacturing method according to the first embodiment. It is a perspective view explaining the absorption foil arrangement
- FIG. 3 is a plan view illustrating a configuration of a comb plate according to Embodiment 1.
- FIG. 3 is a perspective view illustrating a configuration of a comb plate according to Embodiment 1.
- FIG. It is a top view explaining the structure of the absorption foil which concerns on Example 1.
- FIG. It is a perspective view explaining the absorption foil insertion process which concerns on Example 1.
- FIG. It is a perspective view explaining the rod insertion process which concerns on Example 1.
- FIG. 6 is a plan view for explaining a pulling process according to the first embodiment.
- It is a perspective view explaining the structure of the adhesive agent shaping stand which concerns on Example 1.
- FIG. 3 is a perspective view illustrating an adhesive application process according to Example 1.
- FIG. 3 is a perspective view illustrating an adhesive application process according to Example 1.
- FIG. 5 is a cross-sectional view illustrating an adhesive application process according to Example 1.
- FIG. 5 is a cross-sectional view illustrating a cutting process according to Example 1.
- FIG. 6 is a functional block diagram illustrating a configuration of an X-ray imaging apparatus according to Embodiment 2.
- FIG. 10 is a schematic diagram for explaining the operation of the X-ray imaging apparatus according to Embodiment 2. It is sectional drawing explaining the X-ray grid which concerns on the conventional structure. It is a disassembled perspective view explaining the X-ray grid which concerns on the conventional structure.
- FIG. 1 is a cross-sectional view illustrating the configuration of the X-ray grid according to the first embodiment.
- the X-ray grid 1 according to the first embodiment includes an absorbent body 10 in which absorbent foils 10 a are arranged in the y direction, a first sheet cover 11 that covers the upper surface of the absorbent body 10, and the absorbent body 10.
- a second seat cover 12 that covers the lower surface of the first side column 13, a first side column 13 that extends in the x direction, and a second side column 14.
- the absorber 10 has an incident surface 10b on which X-rays are incident and an output surface 10c from which X-rays are emitted.
- the absorber 10 is provided with a strip-shaped absorbent foil 10a extending in the x direction.
- the absorbent foils 10a are arranged in the y direction orthogonal to the x direction, and are arranged in a blind shape when viewed in the entire X-ray grid 1.
- the arrangement pitch is, for example, 500 ⁇ m.
- the absorbing foil 10a is made of a molybdenum alloy that absorbs X-rays.
- the y direction corresponds to the arrangement direction of the present invention.
- the x direction is the stretching direction for the absorbent foil 10a
- the y direction is the thickness direction for the absorbent foil 10a
- the z direction is This is the width direction for the absorbent foil 10a.
- all of the x direction, the y direction, and the z direction are orthogonal to each other.
- the inclination of the absorbent foil 10a will be described.
- the absorbent foil 10a in the absorber 10 is gradually inclined toward the end of the absorber 10 in the y direction.
- the inclination of the absorption foil 10a provided in the X-ray grid 1 according to the first embodiment was changed so as to allow the X-rays that spread radially to pass through when irradiated with the cone-shaped X-ray beam. It has a configuration.
- the X-ray grid 1 is provided so that the plate-like first sheet cover 11 covers the incident surface 10 b of the absorber 10.
- seat cover 12 is equipped so that the output surface 10c of the absorber 10 may be covered from az direction. Both the seat covers 11 and 12 are made of glass fiber that easily transmits X-rays.
- the first seat cover and the second seat cover correspond to the first covering member and the second covering member of the present invention, respectively.
- the first sheet cover 11 is bonded to each of the absorbent foils 10a constituting the absorbent body 10. That is, the first joining member 15 made of a hardened adhesive is fixed to the abutting portion where the first sheet cover 11 and the absorbent foil 10a abut. In other words, the first joining member 15 is provided at the contact portion between the first sheet cover 11 and the incident surface 10 b of the absorber 10. The first joining member 15 is fixed to one side along the extending direction of the absorbent foil 10a. Accordingly, the first joining member 15 has a shape in which rod-shaped members extending in the x direction are arranged in the y direction. The first joining member 15 is also fixed to the first seat cover 11. That is, the first sheet cover 11 and the absorbent foil 10 a are integrated via the first joining member 15.
- the second sheet cover 12 is bonded to each of the absorbent foils 10a constituting the absorber 10.
- the second bonding member 16 is provided at the contact portion between the second sheet cover 12 and the emission surface 10 c of the absorber 10. That is, the second joining member 16 made of a hardened adhesive is fixed to the abutting portion where the second sheet cover 12 and the absorbent foil 10a abut.
- the second bonding member 16 is fixed to the other side along the extending direction opposite to the one side of the absorbent foil 10a. Therefore, the second joining member 16 has a shape in which rod-shaped members extending in the x direction are arranged in the y direction.
- the second joining member 16 is also fixed to the second seat cover 12. That is, the second sheet cover 12 and the absorbent foil 10a are integrated via the second bonding member 16.
- the first side column 13 and the second side column 14 are prismatic members extending in the x direction.
- the first side column 13 is provided on one end side in the x direction of the absorber 10, and the second side column 14 is provided on the other end side opposite to the one end side in the x direction of the absorber 10.
- the first side column 13 and the second side column 14 are provided between both seat covers 11 and 12.
- the first side column 13 and the second side column 14 form both ends of the X-ray grid 1 in the x direction, fix both the seat covers 11 and 12, and make the X-ray grid 1 more robust. Is responsible.
- FIG. 2 is a plan view illustrating the configuration of the X-ray grid according to the first embodiment.
- the end E of the first joining member 15 extends to the end of the X-ray grid 1 in the x direction.
- the central portion C of the first joining member 15 extends in the central portion in the x direction of the X-ray grid 1.
- FIG. 3 is a cross-sectional view illustrating the shape of the joining member according to the first embodiment.
- the thickness in the z direction at the end E of the first joining member 15 is thicker than the thickness in the z direction at the center C of the first joining member 15. Therefore, the adhesive strength between the first sheet cover 11 and the absorbent foil 10 a at the end E of the first joining member 15 is stronger than that at the center C of the first joining member 15.
- the thickness in the z direction at the central portion C of the first joining member 15 is, for example, 0.1 mm to 0.15 mm, and the thickness in the z direction at both ends E of the first joining member 15 is, for example, 1 mm to 0.1 mm. It is 2 mm.
- the width in the z direction of the absorbent foil 10a is, for example, 5.7 mm.
- a gap D is provided between the first joining member 15 and the second joining member 16. Therefore, the first joining member 15 and the second joining member 16 are not directly connected.
- FIG. 4 is a cross-sectional view illustrating the shape of the joining member according to the first embodiment.
- FIG. 4 shows the structure when the X-ray grid is cut at the position of the arrow 17 in FIG. That is, the configuration of the end portion E in the x direction of the first joining member 15 is described.
- the first joining member 15 penetrates and extends through the gaps between the absorbent foils adjacent to each other. Since the first joining member 15 is fixed to one side along the extending direction of the absorbent foil 10 a, the adjacent absorbent foils 10 a are connected by the first joining member 15. If this is seen in the entire X-ray grid, all of the absorbent foil 10 a is integrated by the first bonding member 15.
- the configuration of the second bonding member 16 is the same as that of the first bonding member 15 described above. That is, as shown in FIG. 3, the thickness in the z direction at the end E of the second bonding member 16 is thicker than the thickness in the z direction at the central portion C of the second bonding member 16. Therefore, the adhesive strength between the second sheet cover 12 and the absorbent foil 10 a at the end E of the second bonding member 16 is stronger than that at the center C of the second bonding member 16. Moreover, as shown in FIG. 4, the 2nd joining member 16 osmose
- the second bonding member 16 Since the second bonding member 16 is fixed to the other side along the extending direction of the absorbent foil 10 a, the adjacent absorbent foils 10 a are connected by the second bonding member 16. If this is seen in the entire X-ray grid, all of the absorbent foil 10 a is integrated by the second bonding member 16.
- FIG. 5 is a flowchart illustrating the method for manufacturing the X-ray grid according to the first embodiment.
- the manufacturing method of the X-ray grid 1 includes an absorption foil insertion step S1 in which the absorption foil 10a is inserted into the comb-shaped plates 23 and 24 provided on the absorption foil arrangement table 21, and through holes 10d provided at both ends of the absorption foil 10a. 10e, a rod insertion step S2 for inserting each of the first rod 27 and the second rod 28, a tension step S3 for applying tension to the first rod 27 and pulling the absorbent foil 10a at once, and a plate shape.
- Adhesive application step S4 for applying adhesive 39 before curing to both sheet covers 11, 12; sheet cover application step S5 for attaching both sheet covers 11, 12 to the absorber 10; and X-ray grid 1 for absorbing foil
- a removal step S6 for removing from the arrangement table 21 and a cutting step S7 for cutting both ends of the X-ray grid are provided.
- FIG. 6 is a perspective view illustrating the absorbent foil array table according to the first embodiment.
- the absorbent foil array table 21 according to the first embodiment has a pair of comb-shaped plates 23 and 24 fixed to the base 22.
- the comb plates 23 and 24 are elongated members extending in the y direction, and have grooves 23a and 24a extending substantially in the z direction.
- the grooves 23a and 24a are provided so as to penetrate the comb-shaped plates 23 and 24 from the x direction, and are arranged at equal intervals in the y direction.
- Each of the comb-shaped plates 23 and 24 is provided so as to face the absorbing foil array base 21.
- the absorbing foil 10a having a thickness of 30 ⁇ m is inserted into the grooves 23a and 24a.
- the comb plates 23 and 24 are detachably fixed to the base 22.
- Each of the comb-shaped plates 23 and 24 is fixed by being screwed to support columns 25 and 26 extending in the x direction. That is, each of the comb-shaped plates 23 and 24 is connected by the support columns 25 and 26.
- the support columns 25 and 26 are provided at the ends of the comb-shaped plates 23 and 24 in the y direction. Then, the four members of the comb-shaped plates 23 and 24 and the support columns 25 and 26 are arranged in a rectangular shape to form a frame, and a rectangular parallelepiped space is formed at the center thereof. Further, the support column 25 is not in contact with the base 22, and a gap is provided between the support column 25 and the base 22.
- sequence base 21 equips the outer side of a frame with various members, it shall be mentioned later.
- FIG. 7 is a plan view illustrating the configuration of the comb plate according to the first embodiment.
- the comb plate 23 has a plurality of grooves 23a extending substantially in the z direction.
- the grooves 23a gradually increase from the center of the comb plate 23 toward the end in the y direction. It is inclined. Specifically, each of the grooves 23 a at the end of the comb plate 23 is inclined so that the opening thereof is away from the center of the comb plate 23. And if this groove
- the comb plate 23 is configured by integrating two members. That is, as shown in FIG. 6, the comb plate 23 has a structure in which a main plate 23 b extending in the y direction and a sub plate 23 c that extends in the y direction and is shorter than the main plate 23 b are screwed together. It has become. Specifically, both ends of the sub-plate 23c in the y direction are screwed to the main plate 23b.
- the main plate 23b and the short sub-plate 23c are provided with grooves extending substantially in the z direction, and the grooves 23a of the comb plate 23 are formed by connecting the grooves together.
- FIG. 8 is a perspective view illustrating the configuration of the comb plate according to the first embodiment. As shown in FIG.
- the positions in the y direction of the groove 23d of the main plate 23b and the groove 23e of the sub plate 23c are shifted from each other.
- the widths D1 and D2 in the y direction of the grooves 23d and 23e are 100 ⁇ m. Since the widths D1 and D2 are about three times the thickness of the absorbent foil 10a, when the absorbent foil 10a is inserted into the groove 23d, the absorbent foil 10a is rattled in the y direction.
- the groove 23d and the groove 23e in Example 1 are displaced by 70 ⁇ m in the y direction, the side surface of the groove 23e located in the front in the y direction and the side surface of the groove 23d located in the rear of the y direction The distance is 30 ⁇ m, the same as the thickness of the absorbing foil. Therefore, if the absorption foil 10a is inserted through the comb plate 23, the absorption foil 10a will not rattle in the y direction.
- the configuration of the comb plate 24 is the same as that of the comb plate 23. That is, the groove 24a of the comb plate 24 is inclined as described above, and the comb plate 24 has a main plate 24b and a sub plate 24c.
- FIG. 9 is a plan view illustrating the configuration of the absorbent foil according to the first embodiment.
- the absorbent foil 10 a has a strip shape extending in the x direction, and through holes 10 d and 10 e for inserting rods 27 and 28 described later are provided at both ends in the x direction. .
- FIG. 10 is a perspective view for explaining the absorption foil inserting step according to the first embodiment.
- the absorbent foil 10a is inserted into the groove 23a of the comb plate 23 and the groove 24a of the comb plate 24 from the z direction.
- the absorption foil 10a is supported by the both ends.
- the absorption foil 10a does not fit in the above-mentioned frame, and both ends in the x direction of the absorption foil 10a protrude outside the frame. Therefore, the through holes 10d and 10e protrude outside the frame.
- the absorbent foil insertion step S1 is completed by inserting the absorbent foil 10a into all of the grooves 23a and 24a. At this time, about 400 absorbent foils 10a are arranged in the y direction.
- FIG. 11 is a perspective view illustrating a rod insertion process according to the first embodiment.
- About 400 sheets of the absorbent foil 10a are provided with one through hole 10d, but their positions in the x direction are substantially the same. Therefore, as shown in FIG. 11, if the first rod 27 is inserted through the through-hole 10d of the absorbent foil 10a located at the end in the y direction, the through-hole 10d of the remaining absorbent foil 10a is also the first.
- the rod 27 is inserted.
- the insertion of the first rod 27 is performed collectively for all of the absorbent foils 10a.
- the second rod 28 is inserted through the through hole 10e of the absorbent foil 10a. As with the first rod 27, the insertion of the second rod 28 is performed collectively for all of the absorbent foils 10a. Moreover, this 2nd rod 28 is penetrated not only by the absorption foil 10a but the several 1st fixing tool 29 fixedly provided in the absorption foil arrangement
- FIG. The first fixing tool 29 is provided outside the frame constituted by the comb plates 23 and 24 and the support columns 25 and 26 and adjacent to the comb plate 24.
- the first fixtures 29 are arranged in the y direction.
- the first fixture 29 has a through hole 29 a extending in the y direction that penetrates the first fixture 29.
- a plurality of second fixtures 30 are fixedly provided on the absorbent foil array base 21.
- the second fixture 30 is provided outside the frame constituted by the comb plates 23 and 24 and the support columns 25 and 26 and adjacent to the comb plate 24. Since this member will be important in the subsequent steps, this will be described.
- the second fixtures 30 are arranged in the y direction. Further, the second fixture 30 has a through hole 30 a extending in the y direction that penetrates the second fixture 30. A third rod 31 extending in the y direction is inserted through the through hole 30a in advance.
- the pulling step S3 is a step of pulling the absorbent foil 10a in the x direction using the spring 32 that is a tension applying unit.
- a spring 32 having J-shaped hooks at both ends is prepared.
- one of the hooks of the spring 32 is hooked on the first rod 27 and the other hook of the spring 32 is hooked on the first rod 27 so as to bridge the first rod 27 and the third rod 31.
- the springs 32 are provided so as to be arranged in the y direction at equal intervals.
- each of the absorbent foils 10 a is pulled together by the rods 27 and 28.
- the absorbent foil 10a can be made linear and the absorbent foil 10a can be arranged more orderly.
- each of the absorbent foils 10a is arranged in the y direction to form the absorber 10.
- FIG. 13 is a perspective view illustrating the configuration of the adhesive shaping table according to the first embodiment.
- the adhesive shaping table 35 according to the first embodiment includes a bottom plate 36, and a pair of guide rails 37 and 38 extending in the x direction are provided on the upper surface of the bottom plate 36.
- the pair of guide rails 37 and 38 are sufficiently separated in the y direction, and the first seat cover 11 can be placed in the gap between the pair of guide rails 37 and 38.
- the guide rail 37 has a characteristic shape. That is, the upper surface facing the z direction of the guide rail 37 is a curved smooth surface. That is, the end portion in the x direction of the guide rail 37 has a thick portion 37a that is thicker in the z direction than the center portion of the guide rail. Moreover, the thick portion 37a is tapered in the z direction from the central portion of the guide rail 37 toward the side end in the x direction.
- the guide rail 38 has the same configuration.
- FIG. 14 is a perspective view illustrating an adhesive application process according to the first embodiment.
- the first sheet cover 11 is placed on the bottom plate 36 of the adhesive shaping table 35, and the uncured and gel adhesive 39 is applied to the upper surface of the first sheet cover 11. .
- the adhesive 39 preferably has a dispersed physical property that has lost its fluidity.
- FIG. 15 is a perspective view illustrating an adhesive application process according to the first embodiment.
- the adhesive 39 in the first sheet cover 11 is shaped using a spatula 40 extending in the y direction. That is, the spatula is slid in the x direction with the spatula 40 in contact with both guide rails 37 and 38.
- the adhesive 39 collected by the spatula 40 is As shown in FIG. 16, it is moved in the x direction.
- the thick part 37a is provided in the edge part of both guide rails 37 and 38, when the spatula 40 reaches the taper-shaped thick part 37a, the collection ability of the adhesive agent 39 which the spatula 40 has is , Gradually weaken. Eventually, the collected adhesive 39 remains on the side of the first sheet cover 11 in the x direction, and the adhesive 39 becomes thick in the z direction. This is the end E of the first joining member 15 described above.
- the tapered shape of both the guide rails 37 and 38 is transferred to the adhesive 39 in the first sheet cover 11.
- the shape of the adhesive 39 is shaped also about the 2nd sheet cover 12 similarly to the 1st sheet cover 11.
- the edge part E of the 1st joining member 15 located in the both ends of the x direction in the absorption foil 10a is thicker than the center part C of the 1st joining member 15 located in the center part of the x direction in the absorption foil 10a. It has become.
- the second seat cover 12 has the same configuration.
- FIG. 17 is a cross-sectional view illustrating the cutting process according to the first embodiment. As shown in FIG. 17, cutting is performed at an arrow 41 that is a position belonging to the end E of the first joining member 15 and the second joining member 16. At this time, by moving the round blade cutter in the y direction, both ends of the absorbent foil 10a are cut out and both ends of the absorbent foil 10a having the through holes 10d and 10e are cut off from the absorber 10. Finally, the first side column 13 and the second side column 14 extending in the x direction are attached to both ends of the absorber 10 in the y direction, and the X-ray grid 1 according to the first embodiment is completed.
- the X-ray grid 1 of Example 1 has the absorbent body 10 in which strip-shaped absorbent foils 10a are arranged.
- the shape of the absorbent foil 10 a is such that the absorbent body 10 is integrated with the first sheet cover 11 via the first joining member 15, and the absorbent body 10 is integrated with the second sheet cover 12 via the second joining member 16. It is held by being integrated. Since this 1st junction member 15 and the 2nd junction part member are the structures which hardened the gel-like adhesive agent 39, they inherently generate
- the X-ray grid 1 of the first embodiment since the gap is provided between the first joining member 15 and the second joining member 16, when both the joining members 15 and 16 are cured. Can be suppressed as much as possible. The fact that a gap is provided in both the joining members 15 and 16 means that the amount of the adhesive 39 used for manufacturing the X-ray grid 1 is small by the amount of the gap. Therefore, the curing distortion does not occur as much as the adhesive 39 is omitted.
- the strength of the X-ray grid 1 of Example 1 is sufficient.
- the thickness of the first bonding member 15 at both ends E in the x direction of the first bonding member 15 is thicker than the thickness of the first bonding member 15 at the center C sandwiched between the both ends E. Because. In order to make the absorbent foil 10a straight and to make the arrangement of the absorbent foil 10a orderly, it is necessary to reliably support both ends in the x direction. According to the configuration of the first embodiment, since both ends in the x direction are supported by the thick portion of the first joining member 15, the strength of the X-ray grid 1 is high.
- the X-ray grid 1 of Example 1 is configured to efficiently transmit X-rays directly. This is because the thickness of the first joining member 15 at the central portion C of the first joining member 15 is thin. When the shadow of the first joining member 15 is reflected in the X-ray fluoroscopic image of the subject M, the visibility of the X-ray fluoroscopic image is lowered accordingly. However, according to the configuration of the first embodiment, since the thickness of the first bonding member 15 at the central portion C of the first bonding member 15 is suppressed as much as possible, the X-ray fluoroscopic image of the subject M is reflected directly. The progress of X-rays is not obstructed by the first joining member 15.
- the strength of the X-ray grid 1 in Example 1 is further increased. That is, the absorbent foil 10a is supported by the first joining member 15 and the second joining member 16, but the thickness of the second joining member 16 at both ends in the x direction of the second joining member 16 is the both ends. This is because the thickness is greater than the thickness of the first joining member 15 in the central portion C sandwiched between the portions E. That is, the second bonding member 16 according to the first embodiment has the same effect as the first bonding member 15.
- the adhesive 39 applied to the first sheet cover 11 is shaped by stretching the gel adhesive 39 with the spatula 40. Therefore, the thickness of the end E of the first joining member 15 is constant. That is, according to the configuration of the first embodiment, the amount of the adhesive 39 penetrating into the gap of the absorbent foil 10a is constant, and there is no variation between the gaps of the absorbent foil 10a. Therefore, even if the gap D is provided between the first bonding member 15 and the second bonding member 16, a sufficient amount of the adhesive 39 penetrates into the gap of the absorbent foil 10a. The mechanical strength of the line grid 1 is high.
- Example 1 when the X-ray grid 1 is manufactured, even if both ends of the X-direction of the absorbent foil 10a in the X-ray grid 1 are trimmed, when both ends of the absorbent foil 10a are cut, The absorber 10 is not bent. That is, since the 1st joining member 15 and the 2nd joining member 16 are extended in the crevice between mutually adjacent absorption foils 10a, they connect mutually adjacent absorption foils 10a from the y direction. Even if both ends of the X-ray grid 1 are trimmed in such a state, the absorbent foils 10a adjacent to each other are fixed by the first joining member 15 and the second joining member 16 from the y direction. Will not be deformed.
- FIG. 18 is a functional block diagram illustrating the configuration of the X-ray imaging apparatus according to the second embodiment.
- the X-ray imaging apparatus 50 according to the second embodiment includes a top plate 51 on which the subject M is placed, an FPD 52 including an image sensor provided below the top plate 51, and the top plate 51.
- An X-ray tube 53 that irradiates the FPD 52 with a cone-shaped X-ray beam provided at the top of the FPD 52, an X-ray grid 54 that covers the X-ray detection surface of the FPD 52 and removes scattered X-rays,
- An X-ray tube control unit 55 that controls the tube voltage of the ray tube 53, an X-ray tube moving mechanism 56 that moves the X-ray tube 53, an X-ray tube movement control unit 57 that controls the X-ray tube moving unit 56, and an FPD that moves the FPD 52
- the FPD 52 and the X-ray tube 53 correspond to the radiation detection means and the radiation source of the present invention, respectively.
- the image forming unit 60 and the trimming unit 61 correspond to the image forming unit and the trimming unit of the present invention.
- the X-ray grid 54 is the X-ray grid 1 according to the first embodiment.
- the X-ray imaging apparatus 50 also includes a main control unit 63 that controls the control units 55, 57, and 59 in an integrated manner.
- the main control unit 63 is constituted by a CPU, and realizes the control units 55, 57, and 59 and the trimming unit 61 by executing various programs.
- the subject M is first placed on the top 51. Then, the FPD 52 and the X-ray tube 53 are moved to a position sandwiching the region of interest of the subject M. Next, the size of the field of view is determined by moving the X-ray tube 53 in the z direction.
- the X-ray tube 53 is controlled to emit a cone-shaped X-ray beam. Note that the cone-shaped X-ray beam has a pulse shape. Note that the focal point of the X-ray beam is configured to coincide with the concentration point when the groove of the comb plate 23 is extended. Therefore, the absorption foil of the X-ray grid 54 is inclined along the traveling direction of the X-rays constituting the cone-shaped X-ray beam.
- the X-ray transmitted through the subject M passes through the X-ray grid 54 and enters the FPD 52.
- the FPD 52 sends X-ray detection data to the image forming unit 60.
- the image forming unit 60 forms the original image P0 and sends it to the trimming unit 61.
- the original image P0 also includes data obtained by detecting the end of the X-ray beam. Since the end portion of the X-ray beam passes through the end portion of the X-ray grid 54, the end portion of the X-ray beam passes through the end portion E that is the thickness of the first bonding member 15. Will be.
- the trimming unit 61 cuts out a predetermined region where the shadow of the end E in the original image P0 is reflected to form the X-ray fluoroscopic image P1.
- FIG. 19 is a schematic diagram for explaining the operation of the X-ray imaging apparatus according to the second embodiment. Since the end E of the X-ray grid 54 is located at both ends of the X-ray grid 54 in the x direction, as shown in FIG. 19A, a predetermined region in the original image P0 is also the original image P0. Extending to two end portions L which are parallel to each other. As shown in FIG. 19B, the trimming unit 61 cuts off the two end portions L of the original image P0 that is a predetermined area, and outputs only the central portion of the original image P0. The central portion of the original image P0 is a portion that has passed through the central portion C of the X-ray grid 54.
- the X-ray fluoroscopic image P1 formed by the trimming unit 61 is suitable for diagnosis.
- the position at which the shadow of the thick end portion of the second joining member 16 is reflected in the original image P0 is the same as that of the first joining member 15, and therefore the original image is obtained by the above-described processing by the trimming unit 61. Shadows at both ends in the x direction of the second joining member 16 reflected in P0 are also removed at the same time.
- the formed X-ray fluoroscopic image P ⁇ b> 1 is displayed on the display unit 62.
- an X-ray fluoroscopic image P1 suitable for diagnosis can be provided.
- the trimming unit 61 provided in the X-ray imaging apparatus 50 according to the second embodiment discards a predetermined area in which the shadow of the end E in the original image P0 is reflected. Therefore, the X-ray fluoroscopic image P1 is suitable for diagnosis because shadows at both ends in the x direction of the first bonding member 15 and the second bonding member 16 are not reflected.
- the X-ray grid of each of the above-described embodiments is the one in which the absorbing foils are arranged in a blind shape
- the arrangement of the absorbing foils can be made into a lattice shape to form a cross grid.
- the present invention is suitable for a medical radiation imaging apparatus.
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Abstract
Description
すなわち、従来の構成によれば、吸収箔を直線状とすることが困難であるという問題点がある。吸収箔82の隙間に浸透した接着剤87は、硬化するときに、硬化歪みが生じてしまう。すると、せっかく吸収箔82を平行に配列しても、接着剤87が硬化するにつれ、次第に、吸収箔82には硬化歪みに起因する吸収箔82の位置の狂いが現れる。結局、吸収箔82の配列は、硬化歪みによって乱され、例えば、吸収箔82に付与される張力が緩んで、吸収箔82が蛇行したり、吸収体84の端部において、吸収箔82がJ型に変形したりするのである。
すなわち、本発明に係る放射線グリッドは、延伸方向に伸びた短冊状の放射線を吸収する吸収箔が延伸方向と直交する配列方向に配列されることにより構成されるとともに、放射線が入射する入射面と、放射線が出射する出射面とを有する吸収体と、吸収体における入射面、または出射面の一面を覆う第1被覆部材と、吸収体における一面とは異なる他面を覆う第2被覆部材と、吸収体を構成する吸収箔の各々と第1被覆部材との当接部に配置されるとともに両者を一体化させる第1接合部材と、吸収体を構成する吸収箔の各々と第2被覆部材との当接部に配置されるとともに両者を一体化させる第2接合部材とを備え、第1接合部材と、第2接合部材との間には、間隙が設けられているとともに、第1接合部材の有する延伸方向の両端部における第1接合部材の厚さは、両端部に挟まれた中央部における第1接合部材の厚さよりも肉厚となっていることを特徴とするものである。
10 吸収体
10a 吸収箔
11 第1シートカバー(第1被覆部材)
12 第2シートカバー(第2被覆部材)
15 第1接合部材
16 第2接合部材
52 FPD(放射線検出手段)
53 X線管(放射線源)
54 X線グリッド(放射線グリッド)
60 画像形成部(画像形成手段)
61 トリミング部(トリミング手段)
吸収箔挿入工程の説明に先立って、実施例1に係る吸収箔配列台21について説明する。図6は、実施例1に係る吸収箔配列台を説明する斜視図である。実施例1に係る吸収箔配列台21は、図6に示すように、基台22に固定された一対の櫛型プレート23,24を有している。櫛型プレート23,24は、y方向に伸びた細長状の部材であり、略z方向に延伸した溝23a,24aを有している。この溝23a,24aは、櫛型プレート23,24をx方向から貫通するように設けられているとともに、y方向について等間隔に配列されている。櫛型プレート23,24の各々は、吸収箔配列台21に対向して設けられている。溝23a,24aは、後述するように、厚さ30μmの吸収箔10aが挿通される。なお、この櫛型プレート23,24は、基台22に着脱可能に固定されている。
次に、吸収箔10aの貫通孔10d,および貫通孔10eに第1ロッド27,および第2ロッド28の各々を挿通させる。図11は、実施例1に係るロッド挿通工程を説明する斜視図である。約400枚の吸収箔10aには、貫通孔10dが1つずつ設けられているが、そのx方向の位置は、ほぼ同一となっている。したがって、図11に示すように、y方向における端に位置した吸収箔10aの貫通孔10dに第1ロッド27を挿通させていけば、残りの吸収箔10aの有する貫通孔10dも同様に第1ロッド27が挿通される。こうして、第1ロッド27の挿入は、全ての吸収箔10aについて一括的に行われる。
図11を参照すれば分かるように、第1ロッド27と第3ロッド31とは、互いに隣接している。したがって、第1ロッド27と第3ロッド31との間にバネ32を設けることができる。引っ張り工程S3では、張力付与手段であるバネ32を用いて吸収箔10aをx方向に引っ張る工程である。その張力を付与するために、両端がJ型のフックとなっているバネ32を用意する。そして、第1ロッド27と第3ロッド31とを架橋するようにバネ32のフックの一方を第1ロッド27に引っ掛け、バネ32のフックの他方を第1ロッド27に引っ掛ける。吸収箔10aの各々に対して均一な張力を付与するために、バネ32は、等間隔にy方向に配列するように設けられる。
引っ張り工程S3に続いて、第1シートカバー11に接着剤を塗布しておく。この接着剤塗布工程S4には、接着剤整形台35を使用する。図13は、実施例1に係る接着剤整形台の構成を説明する斜視図である。実施例1に係る接着剤整形台35は、図13に示すように、底板36を有し、底板36の上面に、x方向に伸びた一対の案内レール37,38が設けられている。この一対の案内レール37,38は、y方向に十分に離間しており、第1シートカバー11を一対の案内レール37,38の隙間に載置することができる。
そして、吸収体10の上下面のそれぞれに第1シートカバー11,および第2シートカバー12を貼り付ける。このとき、両シートカバー11,12の有する面のうち、接着剤39が塗布された面が吸収体10に当接するように両シートカバー11,12を吸収体10に装着する。その後、接着剤39は硬化され、第1シートカバー11に塗布された接着剤39は、第1接合部材15となり、第2シートカバー12に塗布された接着剤39は、第2接合部材16となる。こうして、吸収箔10aの各々は、両接合部材15,16によって一体化される。そして、吸収箔10aにおけるx方向の両端部に位置する第1接合部材15の端部Eは、吸収箔10aにおけるx方向の中央部に位置する第1接合部材15の中央部Cよりも肉厚となっている。また、第2シートカバー12も同様の構成となっている。
次に、バネ32を吸収箔配列台21から取り外す。そして、第1ロッド27,および第2ロッド28を吸収体10から引き抜く。さらに、支柱25,26と櫛型プレート23,24とのネジ止めを解除する。そして、基台22と櫛型プレート23,24との固定を解除する。この時点で、櫛型プレート23,24をx軸に沿って吸収体10から離反する方向に引っ張ると、両シートカバー11,12と吸収箔10aとは、一体化された状態で吸収箔配列台21から脱離される。
そして、吸収体10のx方向の両端を切り揃える。図17は、実施例1に係る切断工程を説明する断面図である。図17に示すように、第1接合部材15,第2接合部材16の端部Eに属する位置である矢印41において切断が行われる。このとき、丸刃カッターをy方向に移動させることで、吸収箔10aの両端が切り揃えられ、貫通孔10d,10eを有する吸収箔10aの両端部が吸収体10から切り捨てられる。最後に、x方向に伸びた第1側柱13,第2側柱14を吸収体10のy方向の両端に装着して、実施例1に係るX線グリッド1は、完成となる。
Claims (5)
- 延伸方向に伸びた短冊状の放射線を吸収する吸収箔が前記延伸方向と直交する配列方向に配列されることにより構成されるとともに、放射線が入射する入射面と、放射線が出射する出射面とを有する吸収体と、
前記吸収体における前記入射面、または前記出射面の一面を覆う第1被覆部材と、
前記吸収体における前記一面とは異なる他面を覆う第2被覆部材と、
前記吸収体を構成する吸収箔の各々と前記第1被覆部材との当接部に配置されるとともに両者を一体化させる第1接合部材と、
前記吸収体を構成する吸収箔の各々と前記第2被覆部材との当接部に配置されるとともに両者を一体化させる第2接合部材とを備え、
前記第1接合部材と、前記第2接合部材との間には、間隙が設けられているとともに、
前記第1接合部材の有する前記延伸方向の両端部における前記第1接合部材の厚さは、前記両端部に挟まれた中央部における前記第1接合部材の厚さよりも肉厚となっていることを特徴とする放射線グリッド。 - 請求項1に記載の放射線グリッドにおいて、
前記第2接合部材の有する前記延伸方向の両端部における前記第2接合部材の厚さは、前記両端部に挟まれた中央部における前記第2接合部材の厚さよりも肉厚となっていることを特徴とする放射線グリッド。 - 請求項1または請求項2に記載の放射線グリッドにおいて、
前記第1接合部材における前記延伸方向の両端部において、前記第1接合部材は、互いに隣接する前記吸収箔の隙間に延在し、互いに隣接する前記吸収箔を連結することを特徴とする放射線グリッド。 - 請求項1ないし請求項3のいずれかに記載の放射線グリッドにおいて、
前記第2接合部材における前記延伸方向の両端部において、前記第2接合部材は、互いに隣接する前記吸収箔の隙間に延在し、互いに隣接する前記吸収箔を連結することを特徴とする放射線グリッド。 - 請求項1ないし請求項4のいずれかに記載の放射線グリッドを搭載した放射線撮影装置において、
放射線ビームを照射する放射線源と、
前記放射線ビームを検出して検出信号を形成する前記放射線検出手段と、
前記放射線検出手段の放射線を検出する放射線検出面を覆うように配置された前記放射線グリッドと、
前記検出信号を基に元画像を形成する画像形成手段と、
前記元画像の所定の領域を切り捨てて放射線透視画像を形成するトリミング手段とを備え、
前記元画像の所定の領域は、前記放射線グリッドにおける前記両端部の影が写りこんだ領域であることを特徴とする放射線撮影装置。
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PCT/JP2008/064428 WO2010018617A1 (ja) | 2008-08-11 | 2008-08-11 | 放射線グリッドおよびそれを備えた放射線撮影装置 |
US13/056,643 US8411823B2 (en) | 2008-08-11 | 2008-08-11 | Radiation grid and radiographic apparatus provided with the same |
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PCT/JP2008/064428 WO2010018617A1 (ja) | 2008-08-11 | 2008-08-11 | 放射線グリッドおよびそれを備えた放射線撮影装置 |
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US (1) | US8411823B2 (ja) |
JP (1) | JP4748282B2 (ja) |
WO (1) | WO2010018617A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPWO2014136734A1 (ja) * | 2013-03-07 | 2017-02-09 | 株式会社日立製作所 | 放射線検出器とそれを備えたx線ct装置 |
JP2020507419A (ja) * | 2017-02-16 | 2020-03-12 | アナロジック コーポレイション | 放射線撮像モダリティ用の散乱線除去コリメータ |
JP2022105985A (ja) * | 2021-01-05 | 2022-07-15 | ジーイー・プレシジョン・ヘルスケア・エルエルシー | 付加方式で三次元プリントされた部品からの金属粒子漏出を軽減するシステム及び方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102970930B (zh) * | 2010-07-06 | 2015-01-21 | 株式会社岛津制作所 | 放射线摄影装置 |
EP2910189B1 (en) * | 2014-02-21 | 2016-09-14 | Samsung Electronics Co., Ltd | X-ray grid structure and x-ray apparatus including the same |
CN105139913B (zh) * | 2015-09-08 | 2017-10-13 | 清华大学 | 一种光栅和辐射成像装置 |
US11350892B2 (en) * | 2016-12-16 | 2022-06-07 | General Electric Company | Collimator structure for an imaging system |
EP3444826A1 (en) | 2017-08-14 | 2019-02-20 | Koninklijke Philips N.V. | Low profile anti scatter and anti charge sharing grid for photon counting computed tomography |
CN107582089B (zh) * | 2017-09-29 | 2021-06-29 | 上海联影医疗科技股份有限公司 | 准直器、成像设备、焦点位置跟踪方法及校正方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004093332A (ja) * | 2002-08-30 | 2004-03-25 | Shimadzu Corp | 散乱x線除去用グリッドの製造方法 |
US7072446B2 (en) * | 2003-05-13 | 2006-07-04 | Analogic Corporation | Method for making X-ray anti-scatter grid |
WO2008023430A1 (fr) * | 2006-08-25 | 2008-02-28 | Shimadzu Corporation | Grille creuse et son procédé de fabrication |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4340818A (en) * | 1980-05-14 | 1982-07-20 | The Board Of Trustees Of The University Of Alabama | Scanning grid apparatus for suppressing scatter in radiographic imaging |
WO1994017533A1 (en) * | 1993-01-27 | 1994-08-04 | Oleg Sokolov | Cellular x-ray grid |
US5606589A (en) * | 1995-05-09 | 1997-02-25 | Thermo Trex Corporation | Air cross grids for mammography and methods for their manufacture and use |
US6438210B1 (en) * | 2000-03-28 | 2002-08-20 | General Electric Company | Anti-scatter grid, method, and apparatus for forming same |
US6625253B1 (en) * | 2001-08-21 | 2003-09-23 | The Uab Research Foundation | High ratio, high efficiency mammography grid system |
-
2008
- 2008-08-11 US US13/056,643 patent/US8411823B2/en not_active Expired - Fee Related
- 2008-08-11 WO PCT/JP2008/064428 patent/WO2010018617A1/ja active Application Filing
- 2008-08-11 JP JP2010524632A patent/JP4748282B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004093332A (ja) * | 2002-08-30 | 2004-03-25 | Shimadzu Corp | 散乱x線除去用グリッドの製造方法 |
US7072446B2 (en) * | 2003-05-13 | 2006-07-04 | Analogic Corporation | Method for making X-ray anti-scatter grid |
WO2008023430A1 (fr) * | 2006-08-25 | 2008-02-28 | Shimadzu Corporation | Grille creuse et son procédé de fabrication |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2014136734A1 (ja) * | 2013-03-07 | 2017-02-09 | 株式会社日立製作所 | 放射線検出器とそれを備えたx線ct装置 |
JP2020507419A (ja) * | 2017-02-16 | 2020-03-12 | アナロジック コーポレイション | 放射線撮像モダリティ用の散乱線除去コリメータ |
JP2022105985A (ja) * | 2021-01-05 | 2022-07-15 | ジーイー・プレシジョン・ヘルスケア・エルエルシー | 付加方式で三次元プリントされた部品からの金属粒子漏出を軽減するシステム及び方法 |
JP7350827B2 (ja) | 2021-01-05 | 2023-09-26 | ジーイー・プレシジョン・ヘルスケア・エルエルシー | 付加方式で三次元プリントされた部品からの金属粒子漏出を軽減する方法及び、コリメータの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4748282B2 (ja) | 2011-08-17 |
US8411823B2 (en) | 2013-04-02 |
JPWO2010018617A1 (ja) | 2012-01-26 |
US20110164727A1 (en) | 2011-07-07 |
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