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- W2808616704 abstract "ABSTRACT BACKGROUND AND PURPOSE Computer‐based analysis of Dopamine transporter imaging (DaTscan) can aid in image interpretation. In this study, we examined the distribution of putamen‐to‐caudate ratios (PCRs) obtained by using a clinically available semiquantification method. METHODS Medical records of 32 patients (M:16) with a diagnosis of Parkinson's disease (PD) ( n = 22) or Parkinson's plus syndromes (PPS) ( n = 10) based on clinical follow‐up, were retrospectively reviewed. Single photon emission tomography (SPECT) imaging was performed 4 hours after intravenous injection of 3–5 mCi [I‐123]‐ioflupane. Semiquantitative evaluation using DaTQUANT software was performed. Utility of PCR with a cutoff of .7 and .8 in the diagnosis of nigrostriatal degeneration was assessed. PD and PPS groups based on clinical assessment and caudate‐to‐background ratio (CBR) were assessed separately. RESULTS Minimum PCR for both hemispheres was .74 ± .09 (Mean ± SD, range: .58‐.89), with 65.63% patients (21/32) having PCR > .7. Mean PCR in mild nigrostriatal degeneration was .77 ± .08 (range: .62‐.89) and in advanced nigrostriatal degeneration was .73 ± .09 (range: .58‐.89). Mean PCR in PD group was .73 ± .09 (range: .58‐.89) and in PPS group was .75 ± .10 (range: .61‐.88). CONCLUSIONS Although PCR can intrinsically be a useful indication of disease, this ratio obtained in our analysis by using one of the clinically available automatic semiquantitative methods has large variability and might not be a reliable numeric marker in interpretation of [I‐123]ioflupane studies. This may be due to difficulty in separating caudate from putamen on SPECT images, as well as the nonuniform decreased Ioflupane uptake in both putamen and caudate." @default.
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- W2808616704 date "2018-06-14" @default.
- W2808616704 modified "2023-10-11" @default.
- W2808616704 title "I-123 DaTscan SPECT Brain Imaging in Parkinsonian Syndromes: Utility of the Putamen-to-Caudate Ratio" @default.
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- W2808616704 doi "https://doi.org/10.1111/jon.12530" @default.
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