US 11,693,131 B2
Radiation imaging apparatus and radiation imaging system
Jun Kawanabe, Saitama (JP); and Kentaro Fujiyoshi, Irvine, CA (US)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 12, 2021, as Appl. No. 17/525,441.
Application 17/525,441 is a continuation of application No. PCT/JP2020/015692, filed on Apr. 7, 2020.
Claims priority of application No. 2019-100723 (JP), filed on May 29, 2019.
Prior Publication US 2022/0075085 A1, Mar. 10, 2022
Int. Cl. G01T 1/20 (2006.01); G01T 1/208 (2006.01); H01L 27/146 (2006.01); H04N 25/40 (2023.01)
CPC G01T 1/20181 (2020.05) [G01T 1/208 (2013.01); H01L 27/14659 (2013.01); H04N 25/40 (2023.01)] 19 Claims
OG exemplary drawing
 
1. A radiation imaging apparatus that comprises a first scintillator, a second scintillator which receives radiation transmitted through the first scintillator, a plurality of conversion elements, and a controller, wherein
the plurality of conversion elements include a plurality of first conversion elements and a plurality of second conversion elements with different sensitivities for detecting light emitted from at least one of the first scintillator or the second scintillator, and
during radiation irradiation, the controller is configured to
obtain, from a signal output from not less than one measuring element configured to measure a dose of incident radiation among the plurality of first conversion elements and the plurality of second conversion elements, a first signal corresponding to light converted from radiation by the second scintillator among the first scintillator and the second scintillator, and
output, based on the first signal, a stop signal configured to stop the radiation irradiation to the radiation imaging apparatus, and
after the radiation irradiation, the controller is configured to cause the plurality of first conversion elements and the plurality of second conversion elements to output signals configured to generate an energy subtraction image.