Tomographic image obtainment apparatus and method
AssigneeFUJIFILM Corporation
InventorTomonari Sendai
Life of this patent
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Abstract
When radiographic images are obtained by radiography using a tomographic image obtainment apparatus, the degree of overlap of anatomical structures of a subject is obtained. Further, a condition of exposure, such as angles θ of radiography, is changed based on the degree of overlap. The angles θ of radiography are angles at which a radiation irradiation unit performs radiography at a plurality of positions to obtain a plurality of radiographic images. The tomographic image obtainment apparatus produces a tomographic image by reconstructing the tomographic image from a plurality of radiographic images obtained by irradiating the subject with radiation from various directions.
Claims9
A tomographic image obtainment apparatus, wherein a tomographic image is reconstructed from a plurality of radiographic images obtained by irradiating a subject with radiation from various directions, the apparatus comprising:
- a radiation image detector for obtaining radiographic images of the subject;
- a radiation irradiation unit placed so as to face the radiation image detector, the radiation irradiation unit moving to a plurality of positions and irradiating, at the plurality of positions, the subject placed on the radiation image detector with radiation from various directions;
- an overlap-degree obtainment means for obtaining the degree of overlap of anatomical structures of the subject;
- and
- an exposure condition setting means for setting, based on the degree of overlap obtained by the overlap-degree obtainment means, a condition of exposure by the radiation irradiation unit at the plurality of positions to obtain the plurality of radiographic images.
A tomographic image obtainment method, wherein a tomographic image is reconstructed from a plurality of radiographic images obtained by irradiating a subject with radiation from various directions, the method comprising the steps of:
- obtaining the degree of overlap of anatomical structures of the subject in a direction of irradiation;
- and
- setting a condition of exposure of the subject based on the obtained degree of overlap.
Dependencies are inferred from the claim text.