Radiation imaging apparatus, radiation imaging method, and computer readable storage medium
A radiation imaging apparatus that has a detection unit that detects radiation and outputs image data determines whether or not a grid for scattered ray reduction is installed on the detection unit, and changes a radiation detection range of the detection unit based on the determination result.
1. A radiation imaging apparatus, comprising:
a detection unit configured to detect radiation and output image data;
a determination unit configured to determine whether or not a grid for scattered ray reduction is installed on the detection unit; and
a change unit configured to, based on a determination result of the determination unit, change a radiation detection range of the detection unit.
2. The apparatus according to claim 1 , wherein the detection range is a dynamic range of the detection unit, and the change unit changes the dynamic range of the detection unit based on the determination result of the determination unit.
3. The apparatus according to claim 1 , wherein the change unit sets the detection range to a first range in a case where it is determined that the grid is installed, and sets the detection range to a second range different to the first range in a case where it is determined that the grid is not installed.
4. The apparatus according to claim 3 , wherein a saturation dose which is an upper limit of the second range is higher than a saturation dose which is an upper limit of the first range.
5. The apparatus according to claim 1 , wherein the change unit, in a case where it is determined that the grid is not installed, further decides whether or not to change the detection range based on an imaging part.
6. The apparatus according to claim 1 , further comprising an execution unit configured to, in a case where it is determined by the determination unit that the grid is not installed, execute scattered ray reduction processing.
7. The apparatus according to claim 1 , wherein the detection unit includes a pixel configured to convert radiation into an electrical signal, an integration amplifier configured to amplify the electrical signal, and an A/D conversion unit configured to perform an A/D conversion of output of the integration amplifier, and
the change unit changes an amplification factor of the integration amplifier.
8. The apparatus according to claim 7 , wherein the change unit changes a capacitance of a capacitor configured to control the amplification factor of the integration amplifier.
9. The apparatus according to claim 7 , wherein the change unit, in a case where it is determined that the grid is not installed, lowers a sensitivity of the integration amplifier.
10. The apparatus according to claim 1 , wherein the detection unit includes a pixel configured to convert radiation into an electrical signal, an integration amplifier configured to amplify the electrical signal, and an A/D conversion unit configured to perform an A/D conversion of output of the integration amplifier, and
the change unit changes an input/output range of the A/D conversion unit.
11. The apparatus according to claim 1 , wherein the detection unit includes a pixel configured to convert radiation into an electrical signal, an integration amplifier configured to amplify the electrical signal, and an A/D conversion unit configured to perform an A/D conversion of output of the integration amplifier, and
the change unit changes a saturation dose in the pixel.
12. The apparatus according to claim 11 , wherein the change unit changes a voltage of a difference between a bias voltage applied to the pixel and a reference voltage of the integration amplifier.
13. The apparatus according to claim 1 , wherein the change unit changes the detection range based on primary radiation transmittance of the grid.
14. The apparatus according to claim 1 , further comprising a holding unit configured to hold correspondence information indicating correspondence between an imaging part and a parameter for deciding the detection range, wherein
the change unit changes the detection range based on a parameter associated with a designated imaging part.
15. A radiation imaging apparatus, comprising:
a detection unit configured to detect radiation and output image data according to the detected radiation;
a determination unit configured to determine whether or not to execute scattered ray reduction processing for the image data; and
a change unit configured to, based on whether or not to execute the scattered ray reduction processing, change a radiation detection range of the detection unit.
16. A radiation imaging method for detecting radiation and outputting image data according to the detected radiation, the method comprising:
determining whether or not a grid for scattered ray reduction is installed; and
changing a radiation detection range based on a result of the determination.
17. A radiation imaging method for detecting radiation and outputting image data according to the detected radiation, the method comprising:
determining whether or not to execute scattered ray reduction processing for the image data; and
based on whether or not to execute the scattered ray reduction processing, changing a radiation detection range.
18. A non-transitory storage medium storing a program for causing a computer to execute a radiation imaging method for detecting radiation and outputting image data according to the detected radiation, the method comprising:
determining whether or not a grid for scattered ray reduction is installed; and
changing a radiation detection range based on a result of the determination.
19. A non-transitory storage medium storing a program for causing a computer to execute a radiation imaging method for detecting radiation and outputting image data according to the detected radiation, the method comprising:
determining whether or not to execute scattered ray reduction processing for the image data; and
based on whether or not to execute the scattered ray reduction processing, changing a radiation detection range.