US 11,835,664 B2
Radiation imaging apparatus and radiation imaging system
Ryosuke Miura, Chiba (JP); and Tomoyuki Yagi, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 31, 2022, as Appl. No. 17/657,435.
Claims priority of application No. 2021-069264 (JP), filed on Apr. 15, 2021.
Prior Publication US 2022/0334269 A1, Oct. 20, 2022
Int. Cl. G01T 1/17 (2006.01); G01T 1/02 (2006.01)
CPC G01T 1/17 (2013.01) [G01T 1/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A radiation imaging apparatus configured to perform an image capturing, comprising:
a plurality of first type pixels that include a predetermined pixel; and
a one or more controllers configured to execute:
a correction value determination operation of reading out a signal from the predetermined pixel once or more in a state where radiation is not emitted onto the radiation imaging apparatus, and determining a correction value that is based on the signal read out from the predetermined pixel, and
a radiation dose determination operation of reading out a signal from the predetermined pixel while radiation is emitted onto the radiation imaging apparatus, and determining a dose of radiation that is being emitted, using a value of the signal read out from the predetermined pixel and the correction value, wherein
the controller determines whether or not to execute the correction value determination operation in a case where communication information that causes the preparation of the image capturing is received,
the controller executes the correction value determination operation and executes the radiation dose determination operation using the correction value determined in the correction value determination operation in a case where it is determined that the correction value determination operation is to be executed and then it is determined that the image capturing is to be executed, and
the controller executes the radiation dose determination operation using a predetermined correction value without executing the correction value determination operation in a case where it is determined that the correction value determination operation is not to be executed, and then it is determined that the image capturing is to be executed.