TY - JOUR T1 - Three dimensional spatial resolution correction using frequency-distance-relationship in SPECT JF - Journal of Nuclear Medicine JO - J Nucl Med SP - 1505 LP - 1505 VL - 50 IS - supplement 2 AU - Noriyasu Yamaki AU - Makoto Azuma AU - Hisato Maeda AU - Kan Takeda AU - Nobutoku Motomura Y1 - 2009/05/01 UR - http://jnm.snmjournals.org/content/50/supplement_2/1505.abstract N2 - 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. ER -