Fig. 6
Clinical assessment results of image quality for 1/7 SPECT, proposed method and the standard SPECT. The average scores for the 1/7 SPECT, proposed method and the standard SPECT are 2, 3.85 and 3.85 in terms of general image quality, 1.8,3.8 and 4.15 for details of contrast, 2, 3.75 and 3.9 for presence of artifacts and 1.95, 3.85 and 4.15 for diagnostic confidence. 1/7 SPECT is significantly different from SPECT image enhanced by proposed method under Wilcoxon test (P < 0.05) for all evaluation metrics. Compared to the standard SPECT, proposed method achieved the same general image quality (P > 0.999), similar detail of 99mTc-MDP (P = 0.125), presence of artifacts (P = 0.531) and the diagnostic confidence (P = 0.1875)