RADIATION IMAGE DETECTION DEVICE, RADIATION IMAGING DEVICE AND RADIATION IMAGING SYSTEM

摘要

PROBLEM TO BE SOLVED: To accurately detect a radiation dose to generate a higher-accuracy radiation phase contrast image.SOLUTION: An X-ray imaging system 10 comprises: a first grating 31; a second grating 32 that has a period substantially coinciding with a pattern period of a radiological image to be formed by a radiation having passed through the first grating; a radiation image detector 30 for detecting the radiological image masked by the second grating; and a calculation processing part 22 for processing image data to be acquired by the radiation image detector. In the system, a subject is arranged between a radiation source 11 and the first grating, and the second grating is placed at a relative position different in phase from the radiological image, and the subject is imaged a plurality of times with a constant irradiation time of the radiation. Image data acquired by the radiation image detector in each imaging is subjected to luminance correction on the basis of a dose detected by a dose detection pixel in the imaging.