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Table 1 Interscan variability (test-retest). Agreement between SUVs from test-retest scans (day 1 vs day 2) for original (100% count) scans and split (50% count) scans of both EARL1 and EARL2 images

From: Sensitivity of 18F-fluorodihydrotestosterone PET-CT to count statistics and reconstruction protocol in metastatic castration-resistant prostate cancer

ImageSUV normalizationSUV type100% of counts50% of countsp value (all lesions)p value (> 4.2 mL)
RC% (all lesions)RC% (> 4.2 ml)RC% (all lesions)RC% (> 4.2 mL)
EARL1BodyweightSUVmean25.823.228.225.00.180.80
SUVpeak26.624.730.227.90.130.97
SUVmax30.826.935.931.50.500.41
AUC-PPSUVmean27.627.529.730.00.520.95
SUVpeak27.728.231.332.21.001.00
SUVmax31.730.436.835.80.420.31
EARL2BodyweightSUVmean27.324.429.826.20.580.91
SUVpeak28.126.032.129.60.700.99
SUVmax33.128.639.034.00.370.74
AUC-PPSUVmean28.528.030.630.30.370.99
SUVpeak28.829.232.833.40.691.00
SUVmax33.631.639.537.70.560.53
  1. p value for differences between variances of test-retest differences of 100% vs 50% count images
  2. RC% repeatability coefficient