Add time:08/10/2019         Source:sciencedirect.com

Introduction18F-Fluoropropyl-(+)-dihydrotetrabenazine (18F-FP-(+)-DTBZ) is a vesicular monoamine transporter type 2 (VMAT2) radiotracer for positron emission tomography (PET) imaging to quantify human β-cell mass. Renal cortex and spleen have been suggested as reference regions, however, little is known about 18F-FP-(+)-DTBZ binding in these regions including the fraction of radiometabolite. We compared the kinetics of 18F-FP-(+)-DTBZ and its inactive enantiomer 18F-FP-(−)-DTBZ in baboons, estimated the non-displaceable binding (VND) of the tracers, and used ex vivo studies to measure radiometabolite fractions.

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