Figure 1

Linear regression for microCT, 18 F-FDG-PET and caliper determined tumor volume against reference tumor volume. Best lines were: y = 1.01x - 6.1 (R2 = 0.97) for microCT versus reference volume, y = 1.24x + 15.4 (R2 = 0.75) for 18F-FDG-PET versus reference volume and y = 1.27x + 56.9 (R2 = 0.80) for caliper versus reference volume.