Fig 3. Quantitative metrics of [¹⁸F]florbetapir stratified by visual lung uptake.

Median Vs of subjects from the control group (5 subjects without amyloidosis and 4 subjects with ATTR amyloidosis) was more than three-fold lower than AL amyloidosis subjects (a). RI (b), TBR (c) and SUVmax (d) were the highest in subjects with intense tracer uptake, followed by subjects with mild and no uptake. The control and ATTR subjects demonstrated the lowest TBR and RI. A SUVmax value of 1.5 distinguished subjects with and without lung uptake. The median and interquartile range are shown. Each marker corresponds with a single subject