Radiation image detecting device and drive control method thereof

摘要

An FPD is provided with an ammeter for measuring current on a wired connection of a bias line that applies a bias voltage to pixels. A control circuit compares the measured value of the ammeter and a threshold value. When the measured value of the ammeter is equal to or larger than the threshold value, the control circuit judges that an emission of X-rays from an X-ray source is started. Until before the start of the X-ray irradiation is detected, the control circuit stops supplying electric power to a signal processing circuit, and turns on all TFTs. Once the start of the X-ray irradiation is detected, the control circuit turns off all the TFTs, and makes the FPD shift to a charge accumulation operation. Thereafter, the control circuit turns on a processing power source to start supplying the electric power to the signal processing circuit.

主权项

1. A radiation image detecting device, comprising:
a plurality of pixels arranged in two dimensions, each of said pixels accumulating signal charge corresponding to an amount of radiation from a radiation source; a plurality of switching elements each of which is provided to correspond to each of said pixels, each of said switching element making the corresponding pixel perform a charge accumulation operation of said signal charge and a readout operation of said signal charge; a signal processing circuit for converting said signal charge read out from said pixels into an electric signal and outputting said electric signal; an irradiation detector for detecting whether irradiation of said radiation is started or not based on an electrical change on said pixels; a communication section that exchanges information with external devices; and a controller that stops supplying electric power to said communication section until before the start of the radiation irradiation is detected by said irradiation detector and starts supplying the electric power to said communication section when the start of the radiation irradiation is detected by said irradiation detector.