Radiation detection device and method of manufacturing radiation detection device

1. A radiation detection device, comprising:

a front surface member;

a rear surface member assembled with the front surface member;

a radiation detection panel that is disposed between the front surface member and the rear surface member and detects radiation incident from the front surface member side;

a sheet material that covers an outer peripheral surface of at least one of the front surface member or the rear surface member;

a packing, the sheet material being interposed between the packing and the front surface member or the rear surface member; and

a holding portion that is provided in at least one of the front surface member or the rear surface member and holds the packing in a pressed state.

2. The radiation detection device according to claim 1 ,

wherein the sheet materials cover outer peripheral surfaces of both the front surface member and the rear surface member,

the holding portion is a groove provided in either the front surface member or the rear surface member,

an end portion of one of the sheet materials is inserted into the groove, and

an end portion of the other sheet material is interposed between the front surface member and the rear surface member.

3. The radiation detection device according to claim 2 ,

wherein the end portion of the one sheet material is disposed along a groove wall of the groove.

4. The radiation detection device according to claim 1 ,

wherein the sheet materials cover outer peripheral surfaces of both the front surface member and the rear surface member,

the holding portion is grooves provided in both the front surface member and the rear surface member,

an end portion of one of the sheet materials is inserted into one of the grooves, and

the other sheet material is pressed against a groove bottom of the other groove by the packing, and an end portion of the other sheet material is interposed between the front surface member and the rear surface member.

5. The radiation detection device according to claim 1 ,

wherein the sheet materials cover outer peripheral surfaces of both the front surface member and the rear surface member,

the holding portion is a space interposed between an inner wall protruding from the front surface member toward the rear surface member and an outer wall protruding from the rear surface member toward the front surface member,

one of the sheet materials is disposed along the inner wall, and

the other sheet material is disposed along the outer wall.

6. The radiation detection device according to claim 1 ,

wherein the sheet material covers an outer peripheral surface of one of the front surface member and the rear surface member,

the holding portion is a groove provided in one of the front surface member and the rear surface member, and

the sheet material is interposed between the packing and the front surface member or the rear surface member covered with the sheet material.

7. The radiation detection device according to claim 1 ,

wherein an angle formed by a side surface of the front surface member covered with the sheet material and an opposite surface of the front surface member facing the rear surface member and an angle formed by a side surface of the rear surface member covered with the sheet material and an opposite surface of the rear surface member facing the front surface member are 45° or more.

8. The radiation detection device according to claim 1 ,

wherein each of the front surface member and the rear surface member has a quadrangular shape with a corner portion formed in a curved shape, and

each of an opposite surface of the front surface member facing the rear surface member and an opposite surface of the rear surface member facing the front surface member has a frame shape, and a width of the corner portion is larger than widths of other portions.

9. The radiation detection device according to claim 1 ,

wherein a support plate that supports the radiation detection panel is disposed between the front surface member and the rear surface member, and

the support plate is formed of a MgLi alloy.

10. A method of manufacturing a radiation detection device, comprising:

a step of covering outer peripheral surfaces of a front surface member and a rear surface member with sheet materials;

a step of inserting an end portion of one of the sheet materials into a groove provided on an opposite surface of the front surface member facing the rear surface member and disposing a packing in the groove;

a step of disposing the other sheet material along an opposite surface of the rear surface member facing the front surface member; and

a step of assembling the front surface member and the rear surface member to press the packing and interposing the other sheet material between the packing and the opposite surface.

11. The method of manufacturing a radiation detection device according to claim 10 ,

wherein the one sheet material is heated and softened before covering the outer peripheral surface of the front surface member with the one sheet material,

the front surface member is pressed against the one sheet material, which has been softened, at the time of covering the outer peripheral surface of the front surface member with the one sheet material,

the other sheet material is heated and softened before covering the outer peripheral surface of the rear surface member with the other sheet material, and

the rear surface member is pressed against the other sheet material, which has been softened, at the time of covering the outer peripheral surface of the rear surface member with the other sheet material.