Figure 2

Clinically challenging cases imaged with ¹¹C-labeled Pittsburgh Compound B and ¹⁸F-fluorodeoxyglucose. Autopsy diagnosis is available in three cases. See text for a description of the cases. FDG, ¹⁸F-fluorodeoxyglucose; PIB, ¹¹carbon-labeled Pittsburgh Compound B; DVR, distribution volume ratio; SUVR, standardized uptake value ratio.