Radiographic image detection device, method for operating radiographic image detection device, and program for operating radiographic image detection device

A method for operating a radiographic image detection device including a pixel region in which a plurality of pixels detecting radiation are arranged, and a reading unit that reads a pixel signal from the pixel region, the method comprising:

• a first offset image acquisition step of reading the pixel signal from the pixel region in a state in which the radiation is not emitted to acquire at least two first offset images having different accumulation times;
• a second offset image acquisition step of reading the pixel signal from the pixel region in an accumulation time shorter than that of the plurality of first offset images or using binning reading in a state in which the radiation is not emitted to acquire a second offset image;
• a reference image acquisition step of reading the pixel signal from the pixel region using the same reading method as that used for the second offset image and in a state in which gates of the pixels are turned off to acquire a reference image;
• a first dark current distribution image acquisition step of calculating a difference between the two first offset images having different accumulation times to acquire a first dark current distribution image;
• a second dark current distribution image acquisition step of calculating a difference between the second offset image and the reference image to acquire a second dark current distribution image;
• and
• a determination step of determining whether or not the first offset image and the second offset image need to be reacquired on the basis of a correction error of a corrected image obtained by correcting the first dark current distribution image on the basis of the second dark current distribution image.

A non-transitory computer-readable storage medium storing an operation program for operating a radiographic image detection device comprising a pixel region in which a plurality of pixels detecting radiation are arranged, a reading unit that reads a pixel signal from the pixel region, and at least one processor, the operation program causing the processor to perform:

• a first offset image acquisition process of reading the pixel signal from the pixel region in a state in which the radiation is not emitted to acquire at least two first offset images having different accumulation times;
• a second offset image acquisition process of reading the pixel signal from the pixel region in an accumulation time shorter than that of the plurality of first offset images or using binning reading in a state in which the radiation is not emitted to acquire a second offset image;
• a reference image acquisition process of reading the pixel signal from the pixel region using the same reading method as that used for the second offset image and in a state in which gates of the pixels are turned off to acquire a reference image;
• a first dark current distribution image acquisition process of calculating a difference between the two first offset images having different accumulation times to acquire a first dark current distribution image;
• a second dark current distribution image acquisition process of calculating a difference between the second offset image and the reference image to acquire a second dark current distribution image;
• and
• a determination process of determining whether or not the first offset image and the second offset image need to be reacquired on the basis of a correction error of a corrected image obtained by correcting the first dark current distribution image on the basis of the second dark current distribution image.