Reconstruction method for helical scanning computed tomography apparatus with multi-row detector array employing overlapping beams
US5430783A · kind A · utility
41Cited by
4References
10Claims
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Key dates
| Filing date | Jan 26, 1993 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S378/901
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An x-ray computed tomography system for helically scanning a patient translates the patient as projections of the patient at various beam angles are obtained. A cone beam reconstruction method, which accounts for the divergence of the rays of a fan beam of x-rays, is used to reconstruct multiple narrow slices which are combined to provide a larger slice with an improved slice profile. The conical shape of the fan beam causes some voxels to be scanned more than once for a given beam angle and this extra data is weighted and combined with its counterpart data to improve the quality of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.