US 12,461,258 B2
Radiation imaging apparatus that determines timing of sampling and holding
Takashi Takasaki, Kanagawa (JP); Atsushi Iwashita, Tokyo (JP); Kosuke Terui, Kanagawa (JP); Ryuichi Fujimoto, Tokyo (JP); and Takeshi Noda, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 4, 2023, as Appl. No. 18/365,395.
Claims priority of application No. 2022-128465 (JP), filed on Aug. 10, 2022.
Prior Publication US 2024/0053497 A1, Feb. 15, 2024
Int. Cl. G01T 1/29 (2006.01)
CPC G01T 1/2992 (2013.01) [G01T 1/2928 (2013.01); G01T 1/2978 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radiation imaging apparatus, comprising:
a pixel array including a plurality of pixels configured to detect radiation; and
a controller configured to obtain a radiation generation condition related to a radiation generating apparatus during fluoroscopic imaging, and determine, during the fluoroscopic imaging, timings of a plurality of sampling and holding operations in each of the plurality of pixels in accordance with the radiation generation condition, wherein
the timing of at least one sampling and holding operation of the plurality of sampling and holding operations is a timing in an irradiation period of radiation,
each of the plurality of pixels includes a conversion element configured to convert radiation into an electrical signal, and a sample and hold circuit configured to sample and hold signals from the conversion element multiple times in accordance with the timings, determined by the controller, of the plurality of sampling and holding operations, and
the timings of the plurality of sampling and holding operations include a timing of sampling and holding a signal corresponding to radiation having a first energy, and a timing of sampling and holding a signal corresponding to radiation having a second energy different from the first energy.