Patent ID: 11918402
Assignee: FUJIFILM CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. A radiation image processing method comprising:
acquiring an imaging condition in a case in which a radiation image of a subject is acquired by a radiation detector detecting radiation transmitted through the subject in a state in which an object is interposed between the subject and the radiation detector;
deriving a body thickness distribution of the subject based on the radiation image and the imaging condition;
deriving a radiation characteristic of the object based on the body thickness distribution;
deriving a primary ray distribution and a scattered ray distribution of the radiation detected by the radiation detector by using the imaging condition, the body thickness distribution, and the radiation characteristic of the object; and
deriving an error between a sum of the primary ray distribution and the scattered ray distribution and a pixel value at each position of the radiation image, updating the body thickness distribution such that the error is smaller than a predetermined threshold value, and repeating derivation of the radiation characteristic based on the updated body thickness distribution and derivation of the primary ray distribution and the scattered ray distribution.