Patent ID: 11961165
Assignee: FUJIFILM CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 11:
12. A tomographic image generating apparatus comprising at least one processor,
wherein the processor is configured to:
acquire a plurality of projection images corresponding to a plurality of radiation source positions, the plurality of projection images being generated by causing an imaging apparatus to perform tomosynthesis imaging in which a radiation source is moved relative to a detection surface of a radiation detector in order to emit radiation to a subject at the plurality of radiation source positions according to movement of the radiation source;
reconstruct all or a part of the plurality of projection images to generate a tomographic image on each of a plurality of tomographic planes of the subject;
detect at least one feature point from a plurality of the tomographic images; and
derive a positional shift amount between the plurality of projection images based on body movement of the subject with the feature point as a reference on a corresponding tomographic plane corresponding to the tomographic image in which the feature point is detected,
wherein the subject is a breast, and
wherein the processor is further configured to change a search range in a case of deriving the positional shift amount depending on at least one of a density of a mammary gland, a size of the breast, an imaging time of the tomosynthesis imaging, a compression pressure of the breast in a case of the tomosynthesis imaging, or an imaging direction of the breast.