Title: Iterative list mode reconstruction for coincidence data of gamma camera
Authors: Vandenberghe, S
D'Asseler, Y
Koole, Michel
Bouwens, L
Van de Walle, R
Lemahieu, I
Dierckx, RA #
Issue Date: 2000
Publisher: Spie-int soc optical engineering
Host Document: Medical imaging 2000: image processing, pts 1 and 2 vol:1 issue:24 pages:1538-1546
Conference: Medical Imaging 2000 Conference SAN DIEGO, CA, FEB 13-17, 2000
Abstract: The 3D acquisition data from positron coincidence detection on a gamma camera, can be stored in list-mode or histogram format. The standard processing of the list mode-data is Single Slice Rebinning (with a maximum acceptance angle) to 2D histogrammed projections followed by Ordered Subsets Expectation Maximization reconstruction. This method has several disadvantages: sampling accuracy is lost by histogramming events, axial resolution degrades with increasing distance from the center of rotation and useful events, with angle bigger than the acceptance angle, are not included in the reconstruction. Therefore an iterative reconstruction algorithm, operating directly on list-mode data, has been implemented. The 2D and 3D version of this iterative list-mode algorithm have been compared with the aforementioned standard reconstruction method. A higher number of events is used in the reconstruction, which results in a lower standard deviation. Resolution is fairly constant over the Field of View. The use of a fast projector and backprojector reduces the reconstruction time to clinical acceptable times.
ISBN: 0-8194-3596-1
ISSN: 0277-786X
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Nuclear Medicine & Molecular Imaging
# (joint) last author

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