Self-normalisation of emission data in 3D-PET

Ramsey D Badawi, P. K. Marsden

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations


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 languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference
Place of PublicationPiscataway, NJ, United States
Number of pages4
ISBN (Print)0780350227
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can
Duration: Nov 8 1998Nov 14 1998


OtherProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record
CityToronto, Que, Can

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering


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