Simultaneous transmission and emission converging tomography
US5210421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1077
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A SPECT system includes three gamma camera heads (22a), (22b), (22c) which are mounted to a gantry (20) for rotation about a subject (12). The subject is injected with a source of emission radiation, which emission radiation is received by the camera heads. A reconstruction processor (112) reconstructs the emission projection data into a distribution of emission radiation sources in the subject. Transmission radiation from a radiation source (30) passes through the subject and is received by one of the camera heads (22a) concurrently with the emission radiation. The transmission radiation data is reconstructed into a three-dimensional CT type image representation of radiation attenuation characteristics of each pixel of the subject. An attenuation correction processor (118) corrects the emission projection data to compensate for attenuation along the path or ray that it traversed. In this manner, an attenuation corrected distribution of emission sources is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.