Patent ID: 8847167

Claim:
A radiation image capturing apparatus comprising: a detecting section including: a plurality of scanning lines and a plurality of signal lines provided to cross each other; and a plurality of radiation detection elements arranged in a two-dimensional array in small regions partitioned by the plurality of scanning lines and the plurality of signal lines; a scanning drive unit which applies on-voltage or off-voltage to each of the scanning lines; switch units each connected to each of the scanning lines so as to discharge electric charge accumulated in the radiation detection elements to the signal lines when the on-voltage is applied; a reading circuit for converting the electric charge discharged from the radiation detection elements, into image data to read the image data; and a control device for controlling at least the scanning drive unit and the reading circuit to perform processing of reading the image data from the radiation detection elements, wherein the control device is configured to, prior to radiation image capturing operation, alternately execute processing of reading leak data and processing of resetting each of the radiation detection elements, wherein the control device performs the processing of reading the leak data by converting the electric charge having leaked from the radiation detection elements through the switch units into the leak data, after allowing the scanning drive unit to apply off-voltage to each of the scanning lines so that each of the switch units is turned off, and performs the processing of resetting each of the radiation detection elements by allowing the scanning drive unit to sequentially apply on-voltage to each of the scanning lines, wherein the control device, when detecting a start of irradiation when the read leak data exceeds a threshold value, allows the scanning drive unit to apply the off-voltage to each of the scanning lines so as to conduct transfer to a state of electric charge accumulation so that the electric charge generated by the irradiation is accumulated in each of the radiation detection elements, and the control device performs the processing of reading the image data from each of the radiation detection elements after the transfer to the state of electric charge accumulation, and wherein the control device, after the processing of reading the image data, executes the processing of reading the leak data and the processing of resetting each of the radiation detection elements alternately, with a same cycle as the processing of reading the leak data and the processing of resetting each of the radiation detection elements which have been performed prior to detecting the start of irradiation, and the control device allows the scanning drive unit to apply the off-voltage to each of the scanning lines for a same time period as the state of electric charge accumulation, and then performs the processing of reading the offset data from each of the radiation detection elements with a same cycle as the processing of reading the image data.