Radiation imaging device

1. A radiation imaging device comprising:

a radiation detection panel having a first surface on which a detection region for detecting radiation is formed, and a second surface on a side opposite to the first surface;

a base substrate having a support surface configured to face the second surface of the radiation detection panel and configured to support the radiation detection panel;

one or more flexible circuit substrates connected to the radiation detection panel,

a housing which accommodates the radiation detection panel, the base substrate, and the one or more flexible circuit substrates,

wherein an end portion of the base substrate corresponding to a portion to which the one or more flexible circuit substrates are connected is located further inward than an end portion of the radiation detection panel when seen in a first direction orthogonal to the support surface, and

the base substrate has a protruding portion which protrudes further outward than the radiation detection panel at a position at which the base substrate does not overlap the one or more flexible circuit substrates when seen in the first direction,

the housing has:

a first wall portion which faces the first surface;

a second wall portion which faces the second surface; and

a third wall portion which extends in the first direction and connects the first wall portion to the second wall portion, and

an outer edge of the protruding portion is spaced apart from the third wall portion when seen in the first direction.

2. The radiation imaging device according to claim 1 , wherein the protruding portion is formed at at least two locations.

3. The radiation imaging device according to claim 1 , wherein the protruding portion is formed at at least three locations.

4. The radiation imaging device according to claim 1 , wherein the protruding portion is formed at at least four locations.

5. The radiation imaging device according to claim 1 , wherein:

the radiation detection panel is formed in a rectangular shape when seen in the first direction, and

the protruding portion is provided at a position corresponding to a corner portion of the radiation detection panel.

6. The radiation imaging device according to claim 1 , wherein:

the radiation detection panel is formed in a rectangular shape when seen in the first direction,

at least one of the one or more flexible circuit substrates is connected to at least one side portion of the radiation detection panel, and

the end portion of the base substrate corresponding to a portion of the at least one side portion to which all among the one or more flexible circuit substrates that are connected to the at least one side portion are connected is located further inward than the end portion of the radiation detection panel.

7. The radiation imaging device according to claim 1 , wherein a first extending portion which extends in the first direction is provided on the support surface of the protruding portion.

8. The radiation imaging device according to claim 7 , wherein the first extending portion is a positioning member which positions the radiation detection panel.

9. The radiation imaging device according to claim 7 ,

wherein

the base substrate is supported on the first wall portion via the first extending portion.

10. The radiation imaging device according to claim 9 , wherein:

a second extending portion which is disposed at a position at which the second extending portion faces the first extending portion with the protruding portion interposed therebetween and extends in the first direction is provided on a surface of the protruding portion on a side opposite to the support surface, and

the base substrate is supported on the second wall portion via the second extending portion.

11. The radiation imaging device according to claim 10 , wherein the first extending portion and the second extending portion are formed separately from the base substrate.