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Table 3 Sample size implications of tumor blood flow repeatability from the present study. Calculations were performed to detect relative changes of − 20%, − 30%, and − 50% using a two-sided significance test for paired data with a significance level of 5% and a power of 95%. Log-transformed data were used for all calculations

From: Repeatability of tumor blood flow quantification with 82Rubidium PET/CT in prostate cancer — a test-retest study

  K1 SUVmax SUVmean SUVpeak
Sample size (N) at − 20% change 9 17 18 21
Sample size (N) at − 30% change 5 8 9 10
Sample size (N) at − 50% change 3 4 5 5