Fig. 2
From: Optimizing cardiac amyloidosis assessment: utility of 1-h and 3-h 99mTc-PYP imaging
Comparison of data collected at 1 and 3 h in visually positive vs negative groups. Data on the H/CL ratio measured at 1 and 3 h are shown. At 1 h, there was no patient in the negative group with a higher H/CL value than the minimum in the positive group. At 3 h, one patient in the negative group showed a higher value than the minimum in the positive group. This patient was histologically proven to not have ATTR cardiac amyloidosis. H/CL ratio: a heart-to-contralateral lung ratio