FIGURE 3. Bland–Altman representation of accuracy of gated SPECT ejection fractions compared with planar ERNA, calculated with QGS at 20 min (A) and at 4 h (B) and calculated with MTK at 20 min (C) and at 4 h (D). Except for MTK at 20 min, each process led to significant underestimation.

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