JP4046461B2 - Method for manufacturing scattered radiation absorbing grid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a scattered radiation absorption grid used in a radiation imaging apparatus, and more particularly to a method for manufacturing a scattered radiation absorption grid in which plate members constituting the grid are arranged in a tilted direction of radiation.
[0002]
[Prior art]
A scattered radiation absorption grid is known which is disposed between a subject and a radiation detector when photographing with a radiation photographing apparatus and absorbs scattered radiation scattered by the subject to obtain radiation having a high S / N. Yes.
[0003]
This scattered radiation absorption grid is a flat plate that is formed by arranging a large number of thin and thin grid plates that absorb radiation at regular intervals, and absorbs scattered radiation that is scattered by the subject and travels diagonally. By effectively transmitting only the radiation linearly incident on the radiation detector from the radiation source through the subject, noise due to scattered radiation mixed in the detected subject image is reduced.
[0004]
The plate material constituting the flat grid is directed toward the radiation source so as not to hinder the progress of radiation emitted from the radiation source and linearly incident on the radiation detector through the subject. In order to obtain a higher S / N, it is preferable to arrange them so that the inclination angle increases from the center of the block toward both ends so that they are aligned in the radiation direction.
[0005]
[Problems to be solved by the invention]
However, in order to manufacture this efficient scattered radiation absorption grid, since the inclination angle of the grid plate material is changed little by little, for example, a plurality of types of spacers having different shapes are arranged between the plate materials. In addition, it is necessary to provide a manufacturing process in which a large number of spacers and grid plate materials, each having a slightly different shape, are alternately arranged in a predetermined order. Therefore, the manufacturing process of the scattered radiation absorbing grid is inferior in work efficiency (productivity) and increases the cost of this type of grid.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a scattered radiation absorbing grid having a simplified work process, that is, high productivity.
[0007]
[Means for Solving the Problems]
The manufacturing method of the 1st scattered radiation absorption grid of this invention is many perpendicular | vertical to the surface of the board | plate material for grids as a whole by the grid board | plate material which consists of a radiation absorption material, and the spacer which consists of elastic materials which have a fixed shape alternately. Are arranged adjacent to each other so as to form a flat block body extending in any direction, and with the arrangement of the block bodies maintained, one of the front and back surfaces of the block body with respect to the other is caused by the elastic deformation of the spacer. A pair of top plates made of a radiation transmitting material on both sides of the block body after the cross section in a plane perpendicular to the length direction of the grid plate material of the block body is deformed into a trapezoid shape Is fixed.
[0008]
The second method for manufacturing a scattered radiation absorption grid of the present invention is a method of manufacturing a grid plate material made of a radiation absorbing material and a plurality of spacers made of an elastic material having a certain shape alternately on the surface of the grid plate material as a whole. The flat block members are arranged adjacent to each other so as to form a flat block extending in the vertical direction, and the flat block members are sandwiched by a holding means having a flat pressing surface from both sides. The block body is pressed with a pair of pressing members having inclined surfaces inclined in opposite directions around an axis parallel to the length direction of the grid plate material from both front and rear ends in the arrangement direction, and then the holding means is A pair of top plates made of a radiation transmitting member are fixed to the both surfaces, and then the pressing member is removed.
[0009]
The third method of manufacturing a scattered radiation absorbing grid according to the present invention includes a grid plate made of a radiation absorbing material and a plurality of spacers made of an elastic material having a fixed shape alternately on the surface of the grid plate as a whole. A flat block extending in the vertical direction is arranged adjacent to each other, and a first top plate made of a radiation transmitting member is fixed to one of both the front and back surfaces of the flat block to form a flat plate. The block body is sandwiched from both the front and back surfaces by a gripping means having a flat pressing surface, and the block bodies are mutually connected around the axis parallel to the length direction of the grid plate material from both front and rear ends in the arrangement direction. With a pair of pressing members having inclined surfaces inclined in opposite directions, the block body is pressed so as to compress the surface on which the first top plate is not fixed, and then the holding means is removed. The first top plate is fixed By fixing a second top plate made of radiolucent member on the face of the person is not, then, and removing the pressing member.
[0010]
According to the fourth method of manufacturing a scattered radiation absorption grid of the present invention, a grid plate made of a radiation absorbing material and a spacer made of an elastic material having a certain shape are alternately arranged on the surface of the grid plate as a whole. Adjacent to each other so as to form a flat block extending in the vertical direction, the first top plate made of a radiation transmitting member is fixed to one of the front and back surfaces of the flat block, A film made of a radiation transmitting member having elasticity is adhered to the other surface of the flat block body, and the flat block body is sandwiched by a holding means having a flat pressing surface from both sides, and the film is The block body is extended from both front and rear ends in the arrangement direction, and in a state where the film is extended, the second means made of a radiation transmitting member is provided on the surface that is not fixed to the first top plate by removing the holding means. Fix the top plate Characterized in that it.
[0011]
In the method for manufacturing each scattered radiation absorbing grid, both members are disposed adjacent to each other via an adhesive between a grid plate and a spacer, and the block body is pressed with a pressing member or the film is stretched. Then, the adhesive can be cured.
[0012]
Note that the spacer having a certain shape means a kind of spacer having the same cross-sectional shape. For example, a columnar body such as a rectangular parallelepiped elongated in one direction is suitably used as the spacer.
[0013]
Further, as the grid plate material, it is appropriate to use an elongated thin plate or the like elongated in one direction.
[0014]
In addition, the spacer made of the elastic material is not necessarily limited to a material that elastically deforms accurately over a wide range of deformation, but a material that substantially elastically deforms in a small deformation range, such as foam, paper, cloth, and non-woven fabric. Alternatively, a spacer made of wood or the like may be used.
[0015]
The film may be any film as long as it has a relatively large uniform Young's modulus, such as a plastic film or a laminated film in which a plurality of thin films are laminated.
[0016]
In addition, “compressing or expanding one of the front and back surfaces of the block body in the arrangement direction with respect to the other” means that both the front and back surfaces of the block body are compressed or expanded with equal force. It means that at least one side of both sides is compressed or expanded compared to the other side, and either a force may be applied to only one side or a force may be applied to both sides.
[0017]
【The invention's effect】
According to the first method of manufacturing a scattered radiation absorption grid of the present invention, the block body is formed by arranging a large number of spacers made of an elastic material having a certain shape and grid plate materials alternately. Multiple types of spacers with different shapes are prepared, and these spacers are arranged in a predetermined order at a predetermined location. The material cost is lower and the work efficiency is improved compared to the conventional complicated process. Manufacturing cost can be greatly reduced.
[0018]
In addition, since the block body is compressed or expanded by elastic deformation of the spacer and its cross section is deformed into a trapezoidal shape, the grid plate material can efficiently transmit the radiation emitted from the radiation source. It is possible to manufacture a scattered radiation absorption grid that is substantially inclined in the radial direction at low cost.
[0019]
According to the second method for manufacturing a scattered radiation absorption grid of the present invention, a pair of pressing members having an inclined surface by sandwiching a flat block body from both sides with a holding means having a flat pressing surface. Since the block bodies are pressed from both front and rear ends in the arrangement direction, the grid plate materials can be arranged more reliably.
[0020]
According to the third method for producing a scattered radiation absorbing grid of the present invention, the first top plate made of a radiation transmitting member is fixed to one of the front and back surfaces of the flat block body, and the block body is planar from both sides. A pair of pressing members having an inclined surface is held by a holding means having a pressing surface, and the surface to which the first top plate is not fixed is compressed from both front and rear ends in the arrangement direction. Since the dimensions of the surface of the block body to which the first top plate is fixed can be kept constant, the grid plate members in the block body can be arranged more accurately.
[0021]
According to the fourth method for producing a scattered radiation absorption grid of the present invention, the first top plate made of a radiation transmitting member is fixed to one surface of both the front and back surfaces of the flat block body, and the flat block is formed. Since a film made of a radiation transmitting member having elasticity is adhered to the other surface of the body and the film is extended from both front and rear ends in the arrangement direction of the block body, one surface of both sides of the deformed block body Is fixed by a first top plate, and the other surface is generally stretched uniformly by a film having a smaller Young's modulus variation depending on the location than a plate material or the like, and the grids adjacent to each other on each of the front and back surfaces of this block body Since the intervals between the plate members can be set to substantially equal intervals without variation, the grid plate members can be arranged more accurately.
[0022]
In addition, after placing both members adjacent to each other through the adhesive between the grid plate material and the spacer, after pressing the block body with the pressing member or extending the film to deform the cross section of the block body, If the adhesive is cured, the grid plate material and the spacers are fixed, making it easy to maintain the shape of the entire block body, so that the subsequent work is easy, and the completed grid maintains its shape stably. be able to.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the method for producing a scattered radiation absorption grid of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a scattered radiation absorption grid manufactured by applying the method for manufacturing a scattered radiation absorption grid of the present invention.
[0024]
As shown in FIG. 1, the scattered radiation absorbing grid 100 includes a large number of grid plate materials 10 (see FIG. 2) made of an elongated thin plate-shaped radiation absorbing material and spacers 20 (see FIG. 3) made of an elongated rectangular parallelepiped elastic material. Are arranged between a first top plate 40A and a second top plate 40B.
[0025]
The grid plate 10 is aligned so as to be directed to a radiation source position 200 (see FIG. 6) that is assumed when radiography is performed, and the grid plate 10 is closer to both ends E1 and E2 from the center C. The tilt angle is large.
[0026]
As shown in FIG. 2, the grid plate 10 is an elongated thin plate having a thickness t1 of about 0.1 mm, a width of about 10 mm, and a length of about 440 mm. A material in which a compound, a bismuth compound, or another heavy metal compound is mixed into a solution to form an organic polymer as a binder, and this solution is applied on a flat surface to form a thin plate, or lead foil It is formed of a thin plate-like single material such as bismuth.
[0027]
The spacer 20 has a fixed shape, has an elongated rectangular parallelepiped shape as shown in FIG. 3, has a width and length substantially equal to those of the grid plate material 10, and absorbs radiation having a thickness t2 of about 0.2 mm to 1.0 mm. It is formed of a hard elastic material such as foamed polymer (for example, foamed polystyrene, foamed polypropylene, foamed urethane), non-woven fabric, paper, cloth, wood and the like.
[0028]
The first top plate 40A and the second top plate 40B are made of a radiation transmitting material such as an aluminum plate or an FRP (fiber reinforced plastic) plate.
[0029]
Next, the manufacturing process of the first embodiment of the present invention will be described.
[0030]
As shown in FIG. 4, as shown in FIG. 4, a grid plate 10 made of a radiation absorbing material and a plurality of spacers 20 made of an elastic material are alternately arranged in a plate shape extending in a direction perpendicular to the plane of the grid plate 10 as a whole. Are arranged adjacent to each other so as to form a block body 30. At this time, since a large number of spacers 20 have a fixed shape (since they are one type of spacer having the same cross-sectional shape), any spacer may be arranged at any position. The grid plates 10 and the spacers 20 are regularly and alternately arranged.
[0031]
Further, they are arranged between the grid plate 10 and the spacers 20 with an adhesive 21.
[0032]
In step 2, as shown in FIG. 5, the flat block bodies 30 arranged in step 1 are sandwiched by the sandwiching means 50A and 50B having a flat pressing surface from both sides.
[0033]
As shown in FIG. 6, the block body 30 held by the holding means 50 </ b> A and 50 </ b> B as shown in FIG. 6 is extended from the front and rear ends in the direction in which the grid plate 10 and the spacer 20 are arranged. Pressing is performed by a pair of pressing members 60A and 60B having inclined surfaces 61A and 61B inclined in opposite directions around an axis parallel to the vertical direction.
[0034]
The cross-sectional shape of each spacer 20 in the block body 30 is deformed into a different trapezoidal shape (a shape deformed in the opposite direction symmetrically across the center) by the force pressing the block body 30, and each grid plate 10 is also Inclined according to the deformation of each spacer 20, the entire shape of the block body 30 is also deformed into a trapezoidal pillar shape.
[0035]
At this time, the inclined surfaces 61A and 61B of the pressing members 60A and 60B are set to an angle directed to the direction of the radiation source 200 assumed when performing radiography, and abut against the inclined surfaces 61A and 61B of the pressing member. The grid plate members 10A and 10B positioned in this manner are also inclined toward the assumed position of the radiation source 200 (that is, at an angle along the traveling direction of the radiation).
[0036]
Further, since the block body 30 deformed into the trapezoidal columnar shape is constituted by the spacers 20 made of an elastic material having a certain shape, the spacers 20 are deformed and deformed at the same ratio in the arrangement direction. The length ratio of two parallel sides (B1 and B2) of the trapezoidal cross section of the block body 30 is parallel to the trapezoidal columnar trapezoidal cross section formed by the two grid plates 10 sandwiching the deformed spacers 20. It becomes equal to the ratio of the lengths of the two sides (G1 and G2). As a result, when the two sides that are the hypotenuses of these trapezoidal shapes (that is, the two sides formed by the two grid plates) are extended, they gather toward one point P that coincides with the position of the radiation source 200. . As a result, the grid plate members 10 are aligned with an inclination that allows the radiation emitted from the position of the radiation source 200 to be efficiently transmitted.
[0037]
In Step 4, the adhesive 21 interposed between each grid plate 10 and the spacer 20 is cured in Step 1 while the pressing members 60A and 60B are positioned. The method of curing the adhesive depends on the type of the adhesive 21, but it can be cured by applying heat or by allowing it to stand and proceed with a chemical reaction over time.
[0038]
As Step 5, after the adhesive 21 is cured, the holding member 50A is removed while the pressing members 60A and 60B are positioned, and the block body 30 from which the holding member 50A is removed as shown in FIG. A top plate 40A made of a radiation transmitting member is bonded to the surfaces of the pressing members 60A and 60B.
[0039]
In Step 4, since the adhesive 21 between the grid plate material 10 and the spacer 20 of the block body 30 is cured, the grid plate material 10 and the spacer 20 are separated even if the holding means 50A is removed. Misalignment is suppressed.
[0040]
As Step 6, with the state where Step 5 has been completed, the block body 30, the pressing member 60A, the pressing member 60B, the holding means 50B, and the top plate 40A are turned over as a unit to remove the holding means 50B. And as shown in FIG. 8, the top plate 40B which consists of a radiation transparent member is adhere | attached on the surface of the block body 30 from which the clamping means 50B was removed, and the pressing members 60A and 60B.
[0041]
As step 7, as shown in FIG. 9, the front and rear ends of the block body 30 with the top plates bonded to both sides are cut together with the top plate 40A and the top plate 40B, the pressing members 60A and 60B are removed, and the scattered radiation absorbing grid 100 is obtained (this step is not always necessary).
[0042]
Next, the manufacturing process of the scattered radiation absorption grid of the 2nd Embodiment of this invention is demonstrated using FIGS. 10-13. In the following drawings, the same configuration as that of the first embodiment is indicated by the same reference numeral as that of the first embodiment, and a part of the description is omitted.
[0043]
Step 1 is the same as that in the first embodiment.
[0044]
As step 2, as shown in FIG. 10, a second top plate 40B made of a radiation transmitting member is bonded to one of the front and back surfaces of the flat block body 30. As shown in FIG. At this time, since the grid plate members 10 and the spacers 20 are regularly and accurately arrayed, the length in the array direction of the block bodies 30 bonded to the second top plate 40B is D1.
[0045]
As shown in FIG. 11, as shown in FIG. 11, the flat block body 30 to which the top plate 40B is bonded is sandwiched between the front and back surfaces by sandwiching means 50A and 50B having a planar pressing surface.
[0046]
As shown in FIG. 12, as shown in FIG. 12, the block bodies 30 to which the top plate 40 </ b> B is bonded are inclined in opposite directions from the front and rear ends in the arrangement direction around the axis parallel to the length direction of the grid plate 10. The block body 30 is pressed by the pair of pressing members 60A and 60B having the inclined surfaces 61A and 61B so as to compress the surface to which the second top plate 40B is not bonded.
[0047]
As a result, as described in step 3 of the first embodiment, each grid plate 10 in the block body 30 is inclined toward the extended intersection P ′, which is the assumed radiation source direction.
[0048]
The surface of the block body 30 on the side to which the second top plate 40B is bonded is not deformed by the compression and the dimension D1 when the second top plate 40B is bonded is maintained as it is. The position of the extended intersection P ′ of the trapezoidal cross section formed by the slope 61B and the second top plate 40B can be determined more accurately.
[0049]
Step 5 is the same as step 4 in the first embodiment, and the adhesive interposed between each grid plate 10 and the spacer 20 is cured.
[0050]
As shown in FIG. 13, as shown in FIG. 13, the first top plate 40A made of a radiation transmitting member is bonded to the surface where the holding means 50A and 50B are removed and the second top plate 40B is not fixed.
[0051]
Step 7 is the same step as step 7 of the first embodiment, and the front and rear ends of the block body 30 are cut together with the top plate 40B and the top plate 40A, and the pressing members 60A and 60B are removed to scatter the rays. An absorption grid 100 is obtained.
[0052]
Next, the manufacturing process of the scattered radiation absorption grid of the 3rd Embodiment of this invention is demonstrated using FIGS. 14-18. In the following drawings, the same components as those in the first embodiment or the second embodiment are indicated by the same reference numerals as those in the first embodiment or the second embodiment.
[0053]
Step 1 and step 2 are the same as those in the second embodiment. At this time, since the grid plate members 10 and the spacers 20 are regularly and accurately arranged, the length of the block body 30 adhered to the second top plate 40B in the arrangement direction is D2.
[0054]
In step 3, as shown in FIG. 14, a resin made of a resin such as polycarbonate or PET made of a radiation transmitting member having elasticity on the surface where the second top plate 40B of the flat block body 30 is not fixed. The film 70 is adhered.
[0055]
In step 4, as shown in FIG. 15, the flat block body 30 to which the second top plate 40B and the film 70 are fixed is narrowed by holding means 50A and 50B having a flat pressing surface from both sides. Hold it.
[0056]
In step 5, as shown in FIG. 16, the film 70 is stretched from both front and rear ends in the arrangement direction of the grid plate 10 and the spacer 20 of the block body 30 while being held by the holding means 50A and 50B. .
[0057]
As a result, the surface of the block body 30 on the side to which the film 70 is bonded is generally stretched uniformly by the film having a smaller change in Young's modulus depending on the location than the plate material or the like. Since the dimension of the surface of the block body to which the first top plate is fixed is accurately maintained, the dimensions of the spacers constituting the deformed block body can be reduced. The lengths of the two parallel sides of the trapezoidal shape formed by the two grid plates sandwiched can be set to a constant ratio without variation. Therefore, for the same reason as described above, the variation in the position of the extended intersection of the trapezoidal hypotenuse formed by the two grid plates arranged on both sides of each spacer is reduced, and the grid plate is directed toward the extended intersection. Are arranged with little variation.
[0058]
Thus, in step 5, each grid plate 10 is inclined in the direction toward the assumed radiation source 200.
[0059]
Note that the surface of the block body 30 to which the second top plate 40B is bonded is not deformed by the extension, and the dimension D when the second top plate 40B is bonded is maintained as it is.
[0060]
Step 6 is the same as step 4 of the first embodiment, and the adhesive interposed between each grid plate 10 and the spacer 20 is cured in the first step.
[0061]
In step 7, as shown in FIG. 17, in a state where the film 70 is stretched, the holding means 50A and 50B are removed, and a block made of a radiation transmitting member is formed on the surface of the block body to which the film 70 is bonded. 1 top plate 40A is bonded.
[0062]
In Step 8, as shown in FIG. 18, the front and rear ends of the block body 30 are cut together with the top plate 40B and the top plate 40A to obtain the scattered radiation absorption grid 100.
[0063]
In each of the above-described embodiments, in Step 1, when both members are disposed adjacent to each other via an adhesive between each grid plate material and the spacer, and the block body 30 is deformed in the subsequent steps. This adhesive is cured, but this step is to prevent the position of each grid plate 10 and the spacer 20 from shifting when the first top plate 40A or the second top plate 40B is removed. It is a process and can be omitted.
[0064]
Moreover, in each said embodiment, although the cross section of the flat block body was deformed by the compression by a press member or the expansion | extension of a film, the process of deforming the cross section of a block body is not restricted to such a process. That is, as shown in FIG. 19, the elastic deformation of the spacers 20 maintains the arrangement of the block bodies 30 in which a large number of the spacers 20 made of an elastic material having a certain shape and the grid plate materials 10 are alternately adjacent to each other. The cross section of the block body 30 on the surface perpendicular to the length direction of the grid plate 10 is obtained by compressing or extending one surface 30A of the front and back surfaces of the block body 30 in the arrangement direction with respect to the other surface 30B. The cross section of the block body may be deformed by any process as long as it is a process to be deformed.
[0065]
As described above, according to the present invention, by using a spacer having a certain shape, the manufacturing process is simplified and the working efficiency can be improved. In addition, since the grid plate materials are inclined and arranged by elastically deforming the spacers, a scattered radiation absorption grid capable of efficiently transmitting the radiation emitted from the radiation source can be manufactured at low cost. .
[Brief description of the drawings]
FIG. 1 is a diagram showing a scattered radiation absorption grid produced by the production method of the present invention. FIG. 2 is a diagram showing a schematic shape of a grid plate. FIG. 3 is a diagram showing a schematic shape of a spacer. The figure which shows a mode that a grid board | plate material and a spacer are alternately arranged in the process 1 of embodiment. [FIG. 5] The figure which shows a mode that a block body is clamped by a clamping means in the process 2. FIG. The figure which shows a mode that a block body is pressed with a pressing member. [FIG. 7] The figure which shows a mode that a top plate is adhere | attached on a block body in the process 5. FIG. FIG. 9 is a diagram showing a state in which both ends of the block body are cut in Step 7. FIG. 10 is a diagram showing a state in which the top plate is bonded to the block body in Step 2 of the second embodiment. Means for holding the block body FIG. 12 is a diagram showing a state of pinching. FIG. 12 is a diagram showing a state in which the block body is pressed by a pressing member in Step 4. FIG. 13 is a diagram showing a state in which the top plate is bonded to the block body in Step 6. FIG. 15 is a diagram showing a state in which a film is adhered to a block body in Step 3 of the third embodiment. FIG. 15 is a diagram showing a state in which the block body is sandwiched by a sandwiching means in Step 4. FIG. FIG. 17 is a diagram showing a state in which the film adhered to the block is stretched. FIG. 17 is a diagram showing how the top plate is adhered to the block body in Step 7. FIG. 18 is a diagram showing how the both ends of the block body are cut in Step 8. FIG. 19 is a diagram showing a state in which one side of the front and back sides of the block body is compressed or expanded with respect to the other side.
DESCRIPTION OF SYMBOLS 10 Grid plate material 20 Spacer 30 Block body 40A, B 1st top plate, 2nd top plate 50A, B Holding means 60A, B Pressing member

Claims (6)

A large number of grid plates made of a radiation absorbing material and spacers made of an elastic material having a fixed shape are alternately formed so as to form a flat block body extending in a direction perpendicular to the surface of the grid plate as a whole. Arranged adjacent to
While maintaining the arrangement of the block bodies, one of the front and back surfaces of the block bodies is compressed or extended in the arrangement direction with respect to the other by elastic deformation of the spacers, and the grid plate material of the block bodies is compressed. A method for producing a scattered radiation absorbing grid, comprising: deforming a cross section in a plane perpendicular to a length direction into a trapezoidal shape, and then fixing a pair of top plates made of a radiation transmitting material on both sides of the block body. A large number of grid plates made of a radiation absorbing material and spacers made of an elastic material having a fixed shape are alternately formed so as to form a flat block body extending in a direction perpendicular to the surface of the grid plate as a whole. Arranged adjacent to
Holding the flat block body from both sides with a holding means having a flat pressing surface,
Pressing the block body with a pair of pressing members having inclined surfaces inclined in opposite directions around an axis parallel to the length direction of the grid plate material from both front and rear ends in the arrangement direction of the block bodies;
Then, the pair of top plates made of radiation transmitting members are fixed to the both surfaces by removing the sandwiching means,
Then, the manufacturing method of the scattered radiation absorption grid characterized by removing the said press member. A large number of grid plates made of a radiation absorbing material and spacers made of an elastic material having a fixed shape are alternately formed so as to form a flat block body extending in a direction perpendicular to the surface of the grid plate as a whole. Arranged adjacent to
The first top plate made of a radiation transmitting member is fixed to one of the front and back surfaces of the flat block body,
Nipping the flat block body with a holding means having a flat pressing surface from both the front and back sides,
A pair of pressing members having inclined surfaces inclined in opposite directions around an axis parallel to the length direction of the grid plate material from both front and rear ends in the arrangement direction of the block bodies; Press to compress the side of the top plate that is not fixed,
Then, the second top plate made of a radiation transmitting member is fixed to the surface where the first top plate is not fixed by removing the holding means,
Then, the manufacturing method of the scattered radiation absorption grid characterized by removing the said press member. Both members are disposed adjacent to each other through an adhesive between the grid plate material and the spacer, and the adhesive is cured after the block body is pressed by the pressing member. Item 4. A method for producing a scattered radiation absorption grid according to Item 2 or 3. A large number of grid plates made of a radiation absorbing material and spacers made of an elastic material having a fixed shape are alternately formed so as to form a flat block body extending in a direction perpendicular to the surface of the grid plate as a whole. Arranged adjacent to
The first top plate made of a radiation transmitting member is fixed to one surface of both sides of the flat block body,
Adhering a film made of a radiation transmitting member having elasticity to the other surface of the flat block body,
Holding the flat block body from both sides with a holding means having a flat pressing surface,
The film is extended from both front and rear ends in the arrangement direction of the block bodies,
Scattered rays characterized in that, in a stretched state of the film, the second top plate made of a radiation transmitting member is fixed to the surface that is not fixed to the first top plate by removing the holding means. Absorbent grid manufacturing method. 6. The scattering according to claim 5, wherein both members are disposed adjacent to each other through an adhesive between the grid plate and the spacer, and the adhesive is cured after the film is stretched. A method of manufacturing a line absorption grid.

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