Patent ID: 9063239
Filing Date: 2015-06-23
Classification: A61B,G01T,H04N

Abstract:
1. A radiographic image capture device comprising: a radiation detector including a first sensor for radiographic image capture and a second sensor for radiation detection; and a determination section that determines whether or not radiation has been detected by the radiation detector based on a ratio of a first value obtained by the first sensor to a second value obtained by the second sensor, wherein the first sensor includes a plurality of radiographic imaging pixels that each include a conversion portion that converts irradiated radiation into electrical charge and a switching element that is switched ON when reading electrical charge obtained by the conversion portion; the second sensor includes a plurality of radiation detection pixels that each include a conversion portion and are enabled for direct reading of electrical charge obtained by the conversion portions; the radiation detector comprises the plurality of radiographic imaging pixels and the plurality of radiation detection pixels arrayed in a matrix formation, in which an array containing only the radiographic imaging pixels and an array including at least one radiation detection pixel are included, and a plurality of signal lines, each of which is connected to the pixels arrayed in a different one of the arrays; and the determination section uses a value representing electrical charge read from a first signal line, which is a signal line provided for the array containing only the radiographic imaging pixels, as the first value, uses a value representing electrical charge read from a second signal line, which is a signal line provided for the array including the at least one radiation detection pixel, as the second value, and determines that radiation has been detected by the radiation detection pixels if a condition of the ratio of the second value to the first value being a first threshold value or greater is satisfied, and otherwise determines that radiation has not been detected, electrical charge being read from the first signal line and the second line after switching all of the switching elements OFF.