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Volumes of sclerosis (HU > 600) (a), total choline kinase activity (SUV > 3.5 on FCH PET) (b) and total bone demineralization activity (SUV > 10 on NaF PET) vs. serum PSA (c). PSA correlated with total choline kinase activity (p < 0.02). PSA did not correlate with the amount of sclerosis seen on CT (p > 0.5) nor with the bone demineralization activity (p > 0.2). S-PSA is presented as ng/mL and volumes as percentages of total skeletal volume.
