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

Claim 9:
10. A non-transitory computer-readable storage medium that stores a radiation image processing program causing a computer to execute a processing procedure comprising:
a procedure of 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;
a procedure of deriving a body thickness distribution of the subject based on the radiation image and the imaging condition;
a procedure of deriving a radiation characteristic of the object based on the body thickness distribution;
a procedure of 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
a procedure of 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.