Abstract
We demonstrate that dead-time mismatch between the normalisation and emission acquisitions in three-dimensional positron emission tomography (3D PET) can introduce high-frequency circular image artefacts. We describe a simple correction scheme for this problem where appropriate correction factors are calculated from the emission data itself, thus avoiding the necessity of acquiring normalisation data at a range of different count-rates. In this scheme 'pseudo detector efficiencies' are calculated from the emission data by application of a conventional normalisation algorithm. The mean systematic variation in these pseudo-efficiencies with position within the block-detector is then calculated, and appropriate correction factors applied to the original emission data. We show that this 'self-normalisation' scheme can remove normalisation artefacts in phantom studies, and that it is also effective in vivo.
| Original language | English (US) |
|---|---|
| Title of host publication | IEEE Nuclear Science Symposium and Medical Imaging Conference |
| Place of Publication | Piscataway, NJ, United States |
| Publisher | IEEE |
| Pages | 1894-1897 |
| Number of pages | 4 |
| Volume | 3 |
| ISBN (Print) | 0780350227 |
| State | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can Duration: Nov 8 1998 → Nov 14 1998 |
Other
| Other | Proceedings of the 1998 IEEE Nuclear Science Symposium Conference Record |
|---|---|
| City | Toronto, Que, Can |
| Period | 11/8/98 → 11/14/98 |
ASJC Scopus subject areas
- Computer Vision and Pattern Recognition
- Industrial and Manufacturing Engineering