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Fig. 2 | EJNMMI Research

Fig. 2

From: Impact of the cerebrospinal fluid-mask algorithm on the diagnostic performance of 123I-Ioflupane SPECT: an investigation of parkinsonian syndromes

Fig. 2

VOI settings with and without the CSF-mask algorithm in a DLB case. a The VOI setting without the CSF-mask algorithm and b the VOI setting with the CSF-mask algorithm, where CSF-low-count areas are eliminated (regions encompassed by the red line). SBR indices calculated without the CSF-mask algorithm were 4.77 (R) and 4.72 (L) (a), while those calculated with the CSF-mask were 3.51 (R) and 3.50 (L) (b). The subtle diffuse reduction of tracer uptake in the bilateral striatum is correctly evaluated using the CSF-mask algorithm. VOI volume of interest, CSF cerebrospinal fluid, DLB dementia with Lewy bodies, SBR specific binding ratio, R right, L left

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