Patent ID: 8785876
Filing Date: 2014-07-22
Classification: A61B,G01T,H01L,H04N

Abstract:
1. A radiation image capturing apparatus comprising: a detecting section that includes: a scanning drive unit that applies a voltage to each of the scanning lines while switching the voltage between an ON voltage and an OFF voltage; switch units each connected to each of the scanning lines, discharges electric charges accumulated in the radiation detection elements to the signal lines when the ON voltage is applied thereto through the scanning lines, and accumulates the electric charges in the radiation detection elements when an OFF voltage is applied thereto through the scanning lines; reading circuits which convert the electric charges discharged to the signal lines from the radiation detection elements into image data and reads out the image data during an image data readout process in which the image data is read out from the radiation detection elements; and a controller which controls at least the scanning drive unit and the reading circuit and causes the same to execute the readout process for the data from the radiation detection elements, wherein the controller controls to: before radiation image capturing operation, cause the scanning drive unit to sequentially apply the ON voltage to each of the scanning lines to execute the readout process for the image data from the radiation detection elements, and detect initiation of radioactive irradiation at a time when the read out image data exceeds a threshold value, when the initiation of the radioactive irradiation is detected, cause the scanning drive unit to apply an OFF voltage to all of the scanning lines and turn each of the switch unit to an OFF state to shift to an electric charge accumulation mode, after finishing the radioactive irradiation, cause the scanning drive unit to sequentially apply the ON voltage to each of the scanning lines, and cause the reading circuit to sequentially execute the readout operation to execute the readout process for the image data from each of the radiation detection elements, and make time or period longer during the readout process for the image data before the radiation image capturing operation than the time or period during the readout process for the image data after finishing the radiation image capturing operation, where the time is one causing the scanning drive unit to apply the ON voltage to each of the scanning lines, and the period is one from causing the scanning drive unit to apply the ON voltage to one scanning line until applying the ON voltage to the next scanning line.