US 12,461,256 B2
Scatter grid frequency correction in a radiation imaging apparatus, method of controlling same, radiation imaging system, and storage medium
Naoto Takahashi, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 26, 2023, as Appl. No. 18/358,982.
Claims priority of application No. 2022-128385 (JP), filed on Aug. 10, 2022.
Prior Publication US 2024/0053495 A1, Feb. 15, 2024
Int. Cl. G01T 1/24 (2006.01)
CPC G01T 1/243 (2013.01) 20 Claims
OG exemplary drawing
 
1. A radiation imaging apparatus, comprising:
at least one processor; and
at least one memory storing instructions, which when executed by the processor, cause the radiation imaging apparatus to:
convert radiation into electrical signals, one or more of the plurality of pixels being configured to operate as a detecting pixel for detecting irradiation amounts of the radiation;
reduce a frequency component relating to grid stripes produced by a scattering ray removing grid included in detection values for the irradiation amount of the radiation obtained from the plurality of detecting pixels forming a detecting pixel group; and
reduce the frequency component relating to the grid stripes from a plurality of the detection values read at different times during irradiation.