Patent ID: 11911204
Assignee: FUJIFILM CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. A non-transitory computer-readable storage medium that stores a scattered ray model derivation program causing a computer to execute:
a procedure of acquiring at least one standard image representing a standard object having different thicknesses, the at least one standard image being obtained by imaging the standard object by radiation in a state in which an object is interposed between the standard object and a radiation detector;
a procedure of deriving a relationship between the thickness of the standard object and a radiation attenuation coefficient of the standard object, which corresponds to an energy characteristic of the radiation, the relationship reflecting an influence of beam hardening by the standard object and the object;
a procedure of deriving a primary ray component corresponding to the thickness of the standard object included in the standard image based on the relationship between the thickness of the standard object and the radiation attenuation coefficient of the standard object;
a procedure of deriving a scattered ray component corresponding to the thickness of the standard object included in the standard image based on a difference between the standard image and the primary ray component; and
a procedure of deriving a scattered ray model representing a relationship between the thickness of the standard object and a ratio of the scattered ray component to the primary ray component.