Abstract
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Objectives The relatively low spatial resolution of SPECT is mainly due to the limited collimator resolution. The method frequency-distance relationship (FDR) have been used therefore for two-dimensional resolution correction. We have recently developed three dimensional resolution correction using FDR (3D-FDR) for the correction of distance-dependent blurring.
Methods In this study, we evaluated the performance of our 3D-FDR using some simulation phantoms (sphere phantom, cardiac phantom with defects).
Results In the sphere phantom, the resolution in transaxial, coronal and sagittal images were significantly improved by 3D-FDR. In the cardiac phantom, 3D-FDR gave better identification of defects than without the correction.
Conclusions These results suggest that 3D-FDR would efficiently improve the image resolution in SPECT especially for coronal and sagittal representation with the collimator-to-object distance dependent blurring.
- © 2009 by Society of Nuclear Medicine