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Fig. 4D —Bland-Altman plots show relationships between two reconstruction methods of cardiac MDCT. Plot shows relationships between two methods of cardiac MDCT for measurement of left ventricular end-diastolic volume (LVEDV) (A), left ventricular end-systolic volume (LVESV) (B), left ventricular stroke volume (LVSV) (C), and left ventricular ejection fraction (LVEF) (D). Mean differences (y-axes) between each pair of measurements were calculated using the following formula: [(mean TPRM) – (mean MPRM)]. Mean differences are plotted against average values (x-axes) of same pair. Average values were calculated using the following formula: [{(mean TPRM) + (mean MPRM)} / 2], where TPRM is two-phase reconstruction method and MPRM is multiphase reconstruction method. These results show good agreement, and significant differences were not found between the two reconstruction methods for end-diastolic volume, end-systolic volume, stroke volume, and ejection fraction.