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US 9,848,845 B2Granted
Radiation image detecting device
AssigneeFUJIFILM Corporation
InventorTakashi Tajima
Life of this patent
Estimating the term…
Abstract
A sensor panel of an electronic cassette includes detection pixels each for outputting a dose signal corresponding to a dose of X-rays, an irradiation start judging section for judging whether or not X-ray irradiation has been started based on the dose signal, and an AEC section for judging whether or not an accumulated dose of X-rays has reached a target dose based on the dose signal. A gain setting section sets a gain of an integration amplifier in the case of using the irradiation start judging section lower than that in the case of using the AEC section.
Claims11
An x-ray radiation image detecting device comprising:
- a sensor panel having an imaging area on which pixels are arranged, each of the pixels accumulating electric charges and outputting the electric charges to a signal line, the electric charges corresponding to a dose of x-ray radiation having been irradiated from an x-ray radiation source and having passed through an object;
- a dose detection sensor for outputting a dose signal corresponding to the dose of x-ray radiation;
- an amplifier for amplifying the dose signal;
- an irradiation start judging section for judging whether or not x-ray radiation irradiation has been started based on the dose signal amplified by the amplifier;
- an AEC section for judging whether or not an accumulated dose of x-ray radiation has reached a target dose based on the dose signal amplified by the amplifier;
- and
- a control unit for setting a gain of the amplifier at the time of judging whether or not x-ray radiation irradiation has been started by the irradiation start judging section lower than a gain of the amplifier at the time of judging whether or not the accumulated dose of x-ray radiation has reached the target dose by the AEC section;
- and
- wherein the control unit sets a sampling period of the dose signal at the time of judging whether or not x-ray radiation irradiation has been started by the irradiation start judging section shorter than a sampling period of the dose signal at the time of judging whether or not the accumulated dose of x-ray radiation has reached the target dose by the AEC section.
6 more elements
Dependencies are inferred from the claim text.