Page 97 - Quantitative Imaging of Small Tumours with Positron Emission Tomography

Chapter 4 96 Table 4.1: 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. Image EARL1 SUV normalization Bodyweight SUV type 100% of counts 50% of counts EARL2 AUC-PP Bodyweight AUC-PP SUVmean SUVpeak SUVmax SUVmean SUVpeak SUVmax SUVmean SUVpeak SUVmax 27.6 27.7 31.7 27.3 28.1 33.1 28.5 28.8 33.6 27.53 28.17 30.39 24.4 26.0 28.6 28.0 29.2 31.6 29.7 31.3 36.8 29.8 32.1 39.0 30.6 32.8 39.5 30.0 32.2 35.8 26.2 29.6 34.0 30.3 33.4 37.7 0.52 1.00 0.42 0.58 0.70 0.37 0.37 0.69 0.56 0.95 1.00 0.31 0.91 0.99 0.74 0.99 1.00 0.53 SUVmean SUVpeak SUVmax 25.8 26.6 30.8 23.23 24.70 26.92 28.2 30.2 35.9 25.0 27.9 31.5 0.18 0.13 0.50 0.80 0.97 0.41 RC% = repeatability coefficient; p-value for differences between variances of test-retest differences of 100% vs 50% count images. RC% (all lesions) RC% (>4.2 ml) RC% (all lesions) RC% (>4.2 ml) p-value (all lesions) p-value (>4.2 ml)