Computed tomography device and method using circular-pixel position-adaptive interpolation
US8116426B2 · kind B2 · utility
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Key dates
| Filing date | Nov 11, 2008 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Feb 8, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/005
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of computed-tomography and a computed-tomography apparatus where a interpolation kernel width is adaptively determined as a function of the distance from the x-ray source to the reconstruction pixel. The width of the kernel is the projection of the reconstruction pixel on the detector. The method can be implemented in the channel direction. The method can also be implemented in the segment direction, or in the channel and segment directions at the same time. Backprojection is performed using the adaptive kernel width and may by used with helical and circular scanning, and with cone-beam or fan beam x-ray CT.
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