Transmission attenuation correction method for PET and SPECT
US6429434B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Sep 17, 1999 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Sep 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/02
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A transmission source serves to detect activity from a radiation source for correcting attenuation in either PET mode or SPECT mode. The transmission source includes a detector dedicated to collecting attenuation data in PET mode. A collimated radiation source and a detector are positioned with respect to a tomography device such that only a selected strip of the imaging detector of the tomograph is illuminated such that events unrelated to the attenuation are eliminated. The transmission source can either be a coincidence transmission source or a singles transmission source and includes a collimator in which is disposed a radiation source. An opening is defined by the collimator for exposing a selected portion of the imaging detectors of the tomograph device. Positioned behind the radiation source, relative to the imaging detectors, is the dedicated attenuation detector. In a dual head tomograph device, one transmission source of the present invention is disposed opposite each bank of imaging detectors. The sources and the associated collimators are positioned to the side of each head at a slight angle relative to the respective head. The sources and detectors are fixed relative t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.