Small field-of-view dedicated cardiac SPECT systems: impact of projection truncation |
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| Authors: | Jianbin Xiao Fred J. Verzijlbergen Max A. Viergever Freek J. Beekman |
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| Affiliation: | (1) Image Sciences Institute, University Medical Centre Utrecht, Universiteitsweg 100, STR 5.203, 3584 CG Utrecht, The Netherlands;(2) Robeco, Coolsingel 120, Rotterdam, 3011 AG, The Netherlands;(3) Department of Nuclear Medicine, St. Antonius Hospital, P.O. Box 2500, 3430 EM Nieuwegein, The Netherlands;(4) Section of Radiation, Detection and Medical Imaging, Delft University of Technology, Mekelweg 15, Delft, The Netherlands |
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| Abstract: | Purpose Small field-of-view (FOV) dedicated cardiac SPECT systems suffer from truncated projection data. This results in (1) neglect of liver activity that otherwise could be used to estimate (and subsequently correct) the amount of scatter in the myocardium by model-based scatter correction, and (2) distorted attenuation maps. In this study, we investigated to what extent truncation impacts attenuation correction and model-based scatter correction in the cases of 99mTc, 201Tl, and simultaneous 99mTc/201Tl studies. In addition, we evaluated a simple correction method to mitigate the effects of truncation. |
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