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Quantifying myocardial 99mTechnetium-Pyrophosphate uptake utilizing 1-hour planar imaging H/L ratio
Negative H/L ratio of less than 1 Equivocal H/L ratio of 1.0-1.5 Strongly Suggestive H/L ratio greater than 1.5 Semi-quantitative Visual Grading of Myocardial 99mTechnetium-Pyrophosphate Uptake Relative to Rib
Grade 0 No myocardial uptake and normal bone uptake Grade 1 Myocardial uptake less than rib uptake Grade 2 Myocardial uptake equal to rib uptake Grade 3 Myocardial uptake greater than rib uptake with mild/absent rib uptake