• Lei Jiang, Xixian Wang, Pengtao Li, Zhaohai Feng, Xin Shi, and Hua Shao.
• Department of Neurosurgery.
• Medicine (Baltimore). 2020 Dec 18; 99 (51): e23395e23395.

BackgroundParkinson's disease (PD) has a high incidence in the elderly, and the late stage seriously affects the daily life of the patients. Most of the initial symptoms of PD are not obvious or atypical, which brings difficulties to the early diagnosis. Replacement therapy and neuroprotection after early diagnosis can significantly improve the prognosis and quality of life of patients. More and more evidence shows that 11C-2β-carbomethoxy-3β-(4-fluorophenyl) tropane positron emission tomography ( 11C-CFT PET) combined with 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET) can effectively improve the accuracy of early diagnosis. However, there is no consistent conclusion at present. The purpose of this study is to evaluate the efficacy of 11C-CFT PET combined with 18F-FDG PET in the diagnosis of early PD.MethodsWe will search 7 electronic databases (PubMed, EMBASE, Web of Science, Cochrane library, PsycINFO, AMED, Scopus), ongoing trials and grey literature to collect related randomized controlled trials and will use Review Manager Software 5.2 and STATA Software 16.0 for analysis and synthesis.ResultsWe will integrate the existing randomized controlled trials to evaluate the value of 11C-CFT PET combined with 18F-FDG PET in the diagnosis of early PD.ConclusionOur study may prove that 11C-CFT PET combined with 18F-FDG PET can effectively diagnose early PD.Registration NumberInternational Prospective Register of Systematic Reviews (PROSPERO): CRD42020203442.Copyright © 2020 the Author(s). Published by Wolters Kluwer Health, Inc.

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