Dual-mode gamma camera system utilizing single-photon transmission scanning for attenuation correction of PET data
US5900636A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/1648
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A nuclear camera system includes a pair of detectors orientated 180 degrees apart about an axis of rotation for detecting radiation emitted from an object, a pair of single-photon radiation point sources for transmitting radiation through the object, each to a different detector, and a gantry supporting the detectors and the radiation sources. The gantry provides rotation of the detectors and the radiation source about the axis of rotation, such that the angular positions of the radiation source about the axis of rotation remain fixed relative to the angular positions of the detectors. The camera system further includes a processing system coupled to control the dectors and the radiation sources and to selectably configure the detectors for either coincidence or single-photon emission imaging. The processing system controls the detectors to acquire coincidence emission data of the object and controls the single-photon point sources to acquire transmission data of the object, wherein the radiation from the point sources has a fanbeam illumination profile. The processing system corrects the acquired coincidence emission data for attenuation using the transmission data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.