Fig. 3
From: Optimizing cardiac amyloidosis assessment: utility of 1-h and 3-h 99mTc-PYP imaging
H/CL ratio change between 1 and 3 h in negative and positive groups. The left panel shows the negative group, and the right panel shows the positive group. The majority of patients regardless of the group classification showed a decline in the H/CL ratio at 3 h. Only a single patient in each group showed a change in the opposite direction. H/CL ratio: a heart-to-contralateral lung ratio