Patent ID: 9467631
Filing Date: 2016-10-11
CPC Classification: H04N

Claim Text:
1. A radiation imaging apparatus comprising a sensor and a driving unit configured to drive said sensor, said sensor including: a detection element configured to detect radiation; a first reset unit configured to reset said detection element; a holding unit configured to hold a voltage corresponding to a signal from said detection element; a second reset unit configured to reset said holding unit; a first sampling unit configured to sample a signal corresponding to a voltage of said holding unit; and a second sampling unit configured to sample a signal corresponding to the voltage of said holding unit, wherein said driving unit drives said sensor so as to repeatedly perform a first operation of making said first sampling unit sample a first signal corresponding to a voltage of said holding unit which has changed in accordance with a dose of radiation detected by said detection element after said holding unit holds a voltage corresponding to a signal from said detection element when said first reset unit resets said detection element, and a second operation of making said first reset unit reset said detection element after said second sampling unit samples a second signal corresponding to a voltage of said reset holding unit, after the first operation, while said second reset unit resets said holding unit, and said driving unit further drives said sensor, in a first mode in which an interval from an end of the given second operation to a start of the next first operation is a first interval, so as to execute a third operation of making said first reset unit reset said detection element and making said second reset unit reset said holding unit in the interval, while the second operation also functions as the third operation in a second mode in which an interval from an end of the given second operation to a start of the next first operation is a second interval shorter than the first interval.