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 |
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ASJC Scopus subject areas
- Computer Vision and Pattern Recognition
- Industrial and Manufacturing Engineering
Cite this
Self-normalisation of emission data in 3D-PET. / Badawi, Ramsey D; Marsden, P. K.
IEEE Nuclear Science Symposium and Medical Imaging Conference. Vol. 3 Piscataway, NJ, United States : IEEE, 1999. p. 1894-1897.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Self-normalisation of emission data in 3D-PET
AU - Badawi, Ramsey D
AU - Marsden, P. K.
PY - 1999
Y1 - 1999
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0032596714&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032596714&partnerID=8YFLogxK
M3 - Chapter
SN - 0780350227
VL - 3
SP - 1894
EP - 1897
BT - IEEE Nuclear Science Symposium and Medical Imaging Conference
PB - IEEE
CY - Piscataway, NJ, United States
ER -