Abstract
It is still debated whether or not I-FP-CIT single photon emission computerized tomography (SPECT) is able to differentiate between Parkinson's disease and progressive supranuclear palsy (PSP). Our aim was to use SPECT semiquantitative analysis to assess the capacity of I-FP-CIT to characterize Parkinson's disease versus PSP. Twenty-one Parkinson's disease patients, 15 disease duration- and age-matched PSP patients and 20 age-matched healthy controls were included in this study. SPECT imaging was always performed at 4 h post-injection. The ratios of striatal (S) to non-specific occipital (O) binding for the entire striatum (S/O), caudate nuclei (C/O), putamina (P/O) were calculated in both the basal ganglia. The asymmetric index (AI) for the whole striatum was also calculated for Parkinson's disease and PSP. Compared to healthy controls, S/O, C/O and P/O were significantly reduced (P<0.001) both in Parkinson's disease (-46%, -43%, -49%, contralaterally to the most affected side; -41%, -37%, -41%, ipsilaterally) and in PSP (-58%, -57%, -59%, contralaterally; -58%, -57%, -59%, ipsilaterally). S/O, C/O and P/O ratio values were significantly (P<0.001) lower in PSP patients when compared to Parkinson's disease group. The asymmetric...Continue Reading
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