Fig. 4

Phase analysis results from Quantitative Gated SPECT 2012 program for the same patient as in Figure 1. Phase analysis assessed from OSEM-reconstructed images yielded mildly abnormal results, with the polar map showing relatively well-synchronized function. On the contrary, phase analysis assessed from TOSEM-reconstructed images yielded considerably abnormal results, with the polar map clearly showing delayed contraction in the inferior basal region of the left ventricle. For this patient, the calculated activity ratio value was 73%