Coronal microPET
images, time–activity curve, and blood
clearance of [18F]FPTP or [13N]NH3 in normal rats after intravenous injection. (A) Images acquired
after injection of 37 MBq of [18F]FPTP. (B) Images acquired
after injection of 37 MBq of [13N]NH3. The heart
was visible, with excellent heart-to-background contrast at each time
point after [18F]FPTP injection. H, heart; L, liver; SUV,
standardized uptake value. Time–activity curves generated from
dynamic microPET images using (C) [18F]FPTP or (D) [13N]NH3. [18F]FPTP was retained at a
constant level in the myocardium but was rapidly washed out from the
liver and lungs. (E) Blood clearance of [18F]FPTP or [13N]NH3 in normal rats. The clearance half-time
of [18F]FPTP and [13N]NH3 were less
than 30 s, respectively. x-axis, SUV; y-axis, time (min).