TABLE 2

Repeatability Metrics for Various SUV and Other Tumor Parameters

ParameterwCV (%)RC (%)
SUVmean_30%7.921.9
SUVmean_gradient8.724.0
SUVmax9.025.0
SUVpeak7.721.4
T-to-B ratio (SUVmean_30%/SUVnormal)7.320.1
T-to-B ratio (SUVmean_gradient/SUVnormal)8.323.1
T-to-B ratio (SUVmax/SUVnormal)8.122.6
T-to-B ratio (SUVpeak/SUVnormal)6.016.5
Volume (30% isocontour)11.5 *32.0 *
Volume (gradient)28.8 *79.9 *
SUVmean_30% × volume (30% isocontour)8.222.6
SUVmean_gradient × volume (gradient)28.9 *80.1 *
  • * Data that were not consistent with the normal distribution (Shapiro–Wilk test).

  • For each tumor parameter, difference data D obtained at 1 and 3 h after injection were combined and analyzed as single dataset to increase statistical power.