Table 2: Principal characteristics of PET tracers for cardiovascular imaging.

TracerProductionHalf-lifeExtractionMyocardial uptake mechanism

13N-ammoniaCyclotron10 min80%Diffusion/metabolic trapping (perfusion)
82RubidiumGenerator78 sec50–60%Na/K-ATPase (perfusion)
15O-waterCyclotron2.1 min100%Free diffusion (perfusion)
F-18 FDGCyclotron110 min1–3%Glucose transport/hexokinase (viability)

PET: positron emission tomography; Na/K-ATPase: sodium/potassium-ATPase; FDG: fluorodeoxyglucose.