Quantitative Analysis of ¹⁸F-(E)-N-(3-Iodoprop-2-Enyl)-2β-Carbofluoroethoxy-3β-(4'-Methyl-Phenyl) Nortropane Binding to the Dopamine Transporter in Parkinson Disease

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
Patrik FazioAndrea Varrone

Abstract

(18)F-(E)-N-(3-iodoprop-2-enyl)-2β-carbofluoroethoxy-3β-(4'-methyl-phenyl) nortropane ((18)F-FE-PE2I) is a recently developed radioligand for the in vivo quantification of the dopamine transporter (DAT) in the striatum and substantia nigra (SN). The aim of this study was to examine the suitability of (18)F-FE-PE2I as a tool for imaging the nigrostriatal pathway in Parkinson disease (PD) with PET. Ten PD patients (9 men and 1 woman; mean age ± SD, 60 ± 9 y; Hoehn and Yahr, 1-2; Unified Parkinson Disease Rating Scale motor, 18.9 ± 6.7) and 10 controls (9 men and 1 woman; mean age ± SD, 60 ± 7 y) were included. PET measurements with (18)F-FE-PE2I were conducted for 93 min using the High-Resolution Research Tomograph. Venous blood was drawn to compare protein binding, parent fraction, and radiometabolite composition in PD patients and controls. Regions of interest for the caudate, putamen, ventral striatum, SN, and cerebellum were drawn on coregistered MR images. The outcome measure was the binding potential (BP(ND)) estimated with the simplified reference tissue model and the Logan graphical analysis, using the cerebellum as a reference region. Time stability of BP(ND) was examined to define the shortest acquisition protocol for q...Continue Reading

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