TABLE 1

Interreader Reproducibility

ParameterICC95% CIΔ ± SD (%)
Tumor
 Maximum %IA/g1.00*1.00–1.000 ± 0.1
 Average %IA/g0.95*0.83–0.991 ± 1.3
 Volume (mm3)0.710.22–0.9222 ± 20
 Visual PSMA expression score0.690.17–0.910 ± 0.5
Background
 Blood pool0.560.00–0.870 ± 0.3
 Liver0.510.00–0.851 ± 0.4
 Muscle0.680.18–0.910 ± 0.6

  • ↵* ICC of 0.81–1.00 is defined as almost perfect reproducibility (13).

  • Δ =mean absolute difference; CI = confidence interval.