Radiographic system, radiographic method and computer readable medium

A radiographic method of detecting a radiation image transmitted through a subject with a radiation image detector and generating a phase contrast image of the subject, comprising:

• calculating a correction coefficient of each pixel for making sensitivities of pixels equal on the basis of a refraction angle of radiation incident on each pixel of the radiation image detector, which is calculated by imaging a phantom that gives a known refraction angle to radiation transmitted through the phantom, and a refraction angle given to radiation by the phantom;
• and
• performing sensitivity correction on a refraction angle of radiation incident on each pixel of the radiation image detector, which is calculated by imaging the subject, using the correction coefficient of the pixel and generating a phase contrast image of the subject on the basis of the distribution of corrected refraction angles.

A non-transitory computer readable medium storing a program causing a computer to execute a process for performing a radiographic method of detecting a radiation image transmitted through a subject with a radiation image detector and generating a phase contrast image of the subject, the radiographic method comprising:

• if a phantom that gives a known refraction angle to radiation transmitted through the phantom is imaged, (i) calculating a refraction angle of radiation incident on each pixel of the radiation image detector and (ii) calculating a correction coefficient of each pixel for making sensitivities of pixels equal on the basis of the calculated refraction angle and a refraction angle given to radiation by the phantom;
• and
• if a subject is imaged, (i) calculating a refraction angle of radiation incident on each pixel of the radiation image detector, (ii) performing sensitivity correction on the calculated refraction angle of radiation incident on each pixel of the radiation image detector using the correction coefficient of the pixel, and (iii) generating a phase contrast image of the subject on the basis of the distribution of corrected refraction angles.