Method and apparatus for forming multi-dimensional attenuation correction data in tomography applications
US6040580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jan 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2985
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus for producing radioactive transmission measurements to form multi-dimensional attenuation correction data with a point source of radiation, such as required in positron emission tomography applications. This involves the passing of the point source proximate the face of each of the tomograph units for the formation of a 3-D image, or a selected portion of the tomograph units for a 2-D image. As such, attenuation data, transmission data, detector performance data, etc., can be obtained. This point source of radiation, in one embodiment, is rapidly circulated through a conduit that passes across each detector face under the influence of a transport fluid in, for example, an oscillatory motion to achieve a selected radiation field whereby calculation of transmission measurements within a body positioned within the tomograph scanner is achieved. When not being circulated, the radiation source is held within a shield. In another embodiment, the point source is a CT device. In a further embodiment, a single photon source is used in association with an ECAT ART having two oppositely disposed detector banks. One point source is provided for association with each dete…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.