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Table 2 Heart-to-background uptake ratio according to the Perugini grade

From: Quantification of myocardial 99mTc-labeled bisphosphonate uptake with cadmium zinc telluride camera in patients with transthyretin-related cardiac amyloidosis

Heart-to-background ratioPerugini 1Perugini 2Perugini 3
Whole-body1.45 ± 0.04*1.65 ± 0.22†/‡2.42 ± 0.67
SPECT anterior projection1.51 ± 0.36††1.63 ± 0.24†/‡2.27 ± 0.67
SPECT LAO projection1.24 ± 0.06*1.77 ± 0.29†/‡2.35 ± 0.70
SPECT 3D1.96 ± 0.88*3.07 ± 0.635.01 ± 1.85
  1. *p < 0.01. p < 0.0001 and ††p < 0.05 vs. Perugini grade 3. p < 0.0001 vs. SPECT 3D