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

	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