Fig. 4From: Optimizing cardiac amyloidosis assessment: utility of 1-h and 3-h 99mTc-PYP imagingB/CL ratio change between 1 and 3 h in negative and positive groups. No patient in either group showed a decline in the B/CL ratio at 3 h. B/CL ratio: bone-to-contralateral lung ratioBack to article page