FIGURE 4. Correlation analysis of EDV (A), ESV (C), and LVEF (E) estimated with QGS and 4D-MSPECT from gated 18F-FDG PET. Bland-Altman plots compare QGS versus 4D-MSPECT for EDV (B), ESV (D), and LVEF (F). 4DM = 4D-MSPECT; gFDG-PET = gated 18F-FDG PET.