US 12,150,804 B2
Radiation imaging apparatus, its control method, and medium
Shutaro Kunieda, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 30, 2021, as Appl. No. 17/565,536.
Claims priority of application No. 2021-005077 (JP), filed on Jan. 15, 2021; and application No. 2021-195715 (JP), filed on Dec. 1, 2021.
Prior Publication US 2022/0225956 A1, Jul. 21, 2022
Int. Cl. A61B 6/00 (2024.01); A61B 6/42 (2024.01)
CPC A61B 6/5258 (2013.01) [A61B 6/4233 (2013.01); A61B 6/542 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for controlling a radiation imaging apparatus that acquires a radiation image based on incident radiation, comprising a radiation detecting unit including a pixel region provided with a plurality of pixels for detecting the radiation, the radiation detecting unit outputting an electrical signal relating to the radiation image, the method comprising the steps of:
a storage step of storing a first defect map in which information on a pixel position of a defective pixel among the pixels provided in the pixel region is registered, and in which a defective linear pixel group is not included in a region of interest for detecting a radiation dose in the pixel region in order to perform automatic exposure control for stopping the irradiation of the radiation, and a second defect map in which information on the pixel position of a defective pixel among the pixels provided in the pixel region is registered, and in which the defective linear pixel group is included in the region of interest; and
a correcting step of correcting the radiation image by using one of the first defect map and the second defect map selected in accordance with whether or not the automatic exposure control is performed.