Table 2.

Heart-to-background uptake ratio according to the Perugini grade

Heart-to-background ratio	Perugini 1	Perugini 2	Perugini 3
Whole-body	1.45 ± 0.04*	1.65 ± 0.22†/‡	2.42 ± 0.67‡
SPECT anterior projection	1.51 ± 0.36††	1.63 ± 0.24†/‡	2.27 ± 0.67‡
SPECT LAO projection	1.24 ± 0.06*	1.77 ± 0.29†/‡	2.35 ± 0.70‡
SPECT 3D	1.96 ± 0.88*	3.07 ± 0.63†	5.01 ± 1.85

*p < 0.01. ^† p < 0.0001 and ^††p < 0.05 vs. Perugini grade 3. ^‡p < 0.0001 vs. SPECT 3D