Radiation imaging apparatus, method for controlling the same, and non-transitory computer-readable storage medium

摘要

A radiation imaging apparatus, comprising a sensor array in which a plurality of sensors configured to output signals corresponding to irradiated radiation, a detection unit configured to detect radiation, a driving unit configured to drive the sensor array, so as to initialize the plurality of sensors for each row repeatedly at least until the detection unit detects irradiation of radiation and to read out signals from the plurality of sensors for each row sequentially, and a processing unit configured to process signals from the sensor array, so as to correct a signal from the sensor on a row, of the plurality of sensors, which has been initialized during the irradiation of radiation, based on a timing of the initialization.

主权项

1. A radiation imaging apparatus comprising:
a sensor array in which a plurality of sensors configured to output signals corresponding to irradiated radiation are arranged to form a plurality of rows and a plurality of columns; a driving unit configured to drive the sensor array; a detection unit configured to detect radiation; and a processing unit configured to process signals from the sensor array, wherein the driving unit is configured to drive the sensor array, so as to initialize the plurality of sensors for each row repeatedly at least until the detection unit detects irradiation of radiation, and so as to read out, from the plurality of sensors for each row sequentially, signals each of which corresponds to an amount of charges accumulated after final initialization of the corresponding sensor, and wherein the processing unit is configured
to measure a waveform concerning an intensity of irradiated radiation,to calculate a ratio between a radiation dose measured in a first term from the instant the irradiation is started to the instant the initialization is performed and a radiation dose measured in a second term from the instant the first term ends to the instant the irradiation ends, andto correct a signal from the sensor on a row, of the plurality of sensors, which has been initialized during irradiation of radiation, so as to compensate for a degradation in the signal due to the initialization performed after the irradiation, based on the calculated ratio and the signal from the sensor on the row which has been initialized during the irradiation.