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Phys Med Biol. 2012 Jun 21;57(12):3981-93. doi: 10.1088/0031-9155/57/12/3981. Epub 2012 May 31.

Quantification accuracy and partial volume effect in dependence of the attenuation correction of a state-of-the-art small animal PET scanner.

Author information

1
Department of Preclinical Imaging and Radiopharmacy, Laboratory for Preclinical Imaging and Imaging Technology of the Werner Siemens-Foundation, Eberhard-Karls University of Tuebingen, Tuebingen, Germany. julia.mannheim@med.uni-tuebingen.de

Abstract

Quantification accuracy and partial volume effect (PVE) of the Siemens Inveon PET scanner were evaluated. The influence of transmission source activities (40 and 160 MBq) on the quantification accuracy and the PVE were determined. Dynamic range, object size and PVE for different sphere sizes, contrast ratios and positions in the field of view (FOV) were evaluated. The acquired data were reconstructed using different algorithms and correction methods. The activity level of the transmission source and the total emission activity in the FOV strongly influenced the attenuation maps. Reconstruction algorithms, correction methods, object size and location within the FOV had a strong influence on the PVE in all configurations. All evaluated parameters potentially influence the quantification accuracy. Hence, all protocols should be kept constant during a study to allow a comparison between different scans.

PMID:
22647967
DOI:
10.1088/0031-9155/57/12/3981
[Indexed for MEDLINE]

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