%0 Journal Article %A Noriyasu Yamaki %A Makoto Azuma %A Hisato Maeda %A Kan Takeda %A Nobutoku Motomura %T Three dimensional spatial resolution correction using frequency-distance-relationship in SPECT %D 2009 %J Journal of Nuclear Medicine %P 1505-1505 %V 50 %N supplement 2 %X 1505 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. %U