Radiation ct device and radiation ct system
AssigneeComscantecno Co., Ltd.
InventorYasukazu TANAKA
Life of this patent
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Abstract
A radiation CT device includes a radiation source that emits radiation that spreads three-dimensionally along an optical axis direction; a radiation detector in the form of a two-dimensional array; a moving device that passes a subject through a cone beam of the radiation that spreads three-dimensionally; a cone-beam projection data collector that collects cone-beam projection data, which is acquired by projecting the cone-beam radiation onto the radiation detector, at respective positions in the movement direction; and a reconstructor that reconstructs a tomographic image based on the collected cone-beam projection data.
Claims7
A radiation CT device configured to reconstruct a tomographic image based on projection data acquired by irradiating a subject with radiation,
- the radiation CT device comprising:
- a radiation source configured to emit cone-beam radiation that spreads three-dimensionally along an optical axis direction;
- a radiation detector positioned on one side of the optical axis direction with respect to the radiation source, the radiation detector having channels for detecting the radiation, the channels being arranged in a two-dimensional array;
- a moving device configured to pass the subject through the radiation by moving the subject relative to the radiation source and the radiation detector in a movement direction intersecting the optical axis direction;
- a cone-beam projection data collector configured to collect cone-beam projection data, which is acquired by projecting the cone-beam radiation onto the radiation detector, at respective positions in the movement direction, by detecting, with the radiation detector, the radiation emitted from the radiation source onto the subject that is relatively moved in the movement direction by the moving device;
- and
- a reconstructor configured to reconstruct a tomographic image or three-dimensional data based on the cone-beam projection data.
A radiation CT system, comprising:
- a plurality of projection-data collectors configured to collect projection data acquired by irradiating a subject with radiation;
- and
- a reconstructor configured to reconstruct a tomographic image based on the projection data collected by the projection-data collectors,
- wherein each of the plurality of projection-data collectors comprises:
- a radiation source configured to emit cone-beam radiation that spreads three-dimensionally along an optical axis direction;
- a radiation detector positioned on one side of the optical axis direction with respect to the radiation source, the radiation detector having channels for detecting the radiation, the channels being arranged in a two-dimensional array;
- a moving device configured to pass the subject through the radiation by moving the subject relative to the radiation source and the radiation detector in a movement direction intersecting the optical axis direction;
- and
- an imaging controller configured to collect cone-beam projection data, which is acquired by projecting the cone-beam radiation onto the radiation detector, at respective positions in the movement direction, by detecting, with the radiation detector, the radiation emitted from the radiation source onto the subject that is relatively moved in the movement direction by the moving device,
- wherein the imaging controller of each of the plurality of projection-data collectors performs imaging of the subject while changing a relative angle of the subject with respect to the radiation source and the radiation detector so that projection angles with respect to the subject correspond to continuous imaging directions, thereby collecting the cone-beam projection data such that a total angle range in the movement direction of the radiation source becomes 180° or more,
- and wherein the reconstructor reconstructs a tomographic image or three-dimensional data based on the cone-beam projection data collected at each of the relative angles of the subject.
Dependencies are inferred from the claim text.