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AssigneeHitachi Medical Corporation
InventorsHiroshi Nishimura, Osamu Miyazaki
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A computerized tomography system which includes an X-ray generator for producing X-rays, an X-ray detector array for detecting the X-rays transmitted through a subject, and a subject bed. The X-ray tube and the X-ray detectors are opposed to each other, and the X-ray beams are irradiated upon the subject in a sectorial manner at a large number of angles to scan the subject while the X-ray tube and the X-ray detectors are being revolved around the subject, the X-ray tube and X-ray detectors remaining opposed to each other the during revolution. The system includes a system for rapidly and continuously revolving a frame bearing the X-ray tube, a system for moving the subject bed perpendicularly to a plane of revolution of the X-ray tube and for moving the subject bed synchronously with the revolution of the X-ray tube, a system for scanning the subject along with the movement of the subject bed in a spiral with respect to a coordinate system positioned about an imaginary axis passing through the subject, and a system for obtaining a reconstructed tomogram of an arbitrary cross-section within a range from a position corresponding to a beginning of the spiral scanning to a position corresponding to an end of the spiral scanning. A method of operating the computerized tomography system is also provided.
A computerized tomography system which includes an X-ray generator for producing X-rays, an X-ray detector array for detecting the X-rays transmitted through a subject, and a subject bed, said X-ray tube and said X-ray detectors being opposed to each other, X-ray beams being irradiated upo said subject in a sectorial manner at a large number of angles to scan said subject while said X-ray tube and said X-ray detectors are being revolved around said subject, said X-ray tube and said X-ray detectors remaining opposed to each other during the revolution, said system comprising:
A computerized tomography system comprising an X-ray tube for generating X-rays, X-ray detectors opposed to said X-ray tube to detect X-rays transmitted through a subject, a frame which is continuously rotated while bearing said X-ray tube and said X-ray detectors, a bed which is moved while bearing said subject, means for moving said bed perpendicularly to a plane of revolution of said X-ray tube and synchronously with said revolution, and means for irradiating X-rays upon said subject from said X-ray tube during the movement of said bed to spirally scan said subject.
A computerized tomography system including an X-ray tube for generating X-rays, X-ray detectors opposed to said X-ray tube to detect X-rays transmitted through a subject, a frame which is continuously rotated while bearing said X-ray tube and said X-ray detectors, and a bed which is moved while bearing said subject, said system comprising:
A method of operating a computerized tomography system which includes an X-ray generator for producing X-rays, an X-ray detector array for detecting the X-rays transmitted through a subject, and a subject bed, said X-ray tube and said X-ray detectors being opposed to each other, X-ray beams being irradiated upon said subject in a sectorial manner at a large number of angles to scan said subject while said X-ray tube and said X-ray detactors are being revolved around said subject, said X-ray tube and said X-ray detectors remaining opposed to each other during the revolution, said method comprising the steps of:
A method of operating a computerized tomography system including an X-ray tube for generating X-rays, X-ray detectors opposed to said X-ray tube to detect X-rays transmitted through a subject, a frame which is continuously rotated while bearing said X-ray tube and said X-ray detectors, a bed which is moved while bearing said subject, said method comprising the steps of moving said bed perpendicularly to a plane of revolution of said X-ray tube and synchronously with said revolution, and irradiating X-rays upon said subject from said X-ray tube during the movement of said bed to spirally scan said subject.
Dependencies are inferred from the claim text.