Filter set of computed tomography scanning device and control method thereof
US10709396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2016 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Apr 11, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/544
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.