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US 12,548,222 B2Granted
X-ray CT apparatus and CT image reconstruction method
AssigneeFUJIFILM Corporation
InventorsYoshiki Mori, Yuta Ogura, Ryota Kohara, Yusuke Tetsumura
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AssigneeFUJIFILM Corporation
InventorsYoshiki Mori, Yuta Ogura, Ryota Kohara, Yusuke Tetsumura
Estimating the term…
To reduce an unnatural distortion of an image that occurs in a case in which a high absorption body of X-rays is included in movement correction image reconstruction processing of a CT image. High absorption body presence or absence determination processing of determining whether or not a high absorption body of X-rays is included is added to movement correction image reconstruction processing, and processing of limiting pixel values of an image pair used for movement correction or processing of selecting an image pair used for calculating a movement vector is performed based on a result of the determination. An X-ray CT apparatus includes a high absorption body determination unit or a pixel value adjustment unit to perform these pieces of processing.
An X-ray CT apparatus comprising:
A CT image reconstruction method of calculating a movement vector of a subject by using an image pair extracted from transmitted X-ray data acquired by using an X-ray CT apparatus and generated from the transmitted X-ray data at two facing angle positions, and performing image reconstruction in which movement of the subject is corrected by using the movement vector and the transmitted X-ray data, the method comprising:
A CT image reconstruction method of calculating a movement vector of a subject by using an image pair extracted from transmitted X-ray data acquired by using an X-ray CT apparatus and generated from the transmitted X-ray data at two facing angle positions, and performing image reconstruction in which movement of the subject is corrected by using the movement vector and the transmitted X-ray data, the method comprising:
Dependencies are inferred from the claim text.