The results here essentially recapitulate those of the 5-fold cross validation with SUV bw and SUV lbm both having clearly significant correlation to body habitus, SUV bsa showing weak correlation, and SUV fdg having no significant correlation.
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SUVfdg: A standard-uptake-value (SUV) body habitus normalizer specific to fluorodeoxyglucose (FDG) in humans.
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The sentences
These decreases did not reach statistical significance but are consistent with at least one other study which showed reduced brain glucose metabolic rates in older adults based on a modeled quantitative assessment of 18 F-FDG uptake [ 23 ].