Filter set of computed tomography scanning device and control method thereof
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United States of America Patent
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Jul 14, 2020
Grant Date -
Jul 6, 2017
app pub date -
Dec 9, 2016
filing date -
Dec 30, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A filter set of a CT scanning device and control method thereof are provided. An example of the CT scanning device includes a gantry, an X-ray generator, a filter set, a detector, and a drive motor. The filter set includes a disc, a filter disposed on the disc and having a substantially annular groove structure, and a drive shaft connected to the disc. A body thickness of the annular groove structure varies in a circumferential direction and a radial direction. A shaft axis of the drive shaft is parallel to a radiation direction of X-ray. As the drive shaft is driven by the drive motor, the disc rotates around the shaft axis, such that a region of the filter is aligned with the radiation direction of the X-ray, and a body thickness of the region corresponds to a respective X-ray attenuation for an examination region of a subject.
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