Dual parallel cone beam circular scanning trajectories for reduced data incompleteness in three-dimensional computerized tomography
US5068882A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Aug 27, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/5264
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A configuration of three-dimensional cone beam computerized tomography imaging which minimizes the incompleteness of the data set acquired, while providing fast data acquisition to minimize motion artifacts. An object within a field of view is scanned, preferably simultaneously, along a pair of circular source scanning trajectories spaced a distance selected to minimize the amount of missing data. A procedure is disclosed for calculating the spacing distance between the scanning trajectories which minimizes the amount of missing data. In one embodiment, a pair of cone beam x-ray sources are employed and a corresponding pair of two-dimensional array detectors. In order to reduce interference caused by x-rays from one source interacting with the detector corresponding to the other source, the cone beam x-ray sources are angularly offset, for example by 90.degree..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.