Fig. 3.

Examples of resampled PET images using RQ and AQ methods. The 16-bin resampled voxel intensities within tumors are presented as different colors (see color bars). Even though the tumor in case II has relatively lower SUVs than the tumor in case I, the tomography of case II (RQ) is exaggerated and looks similar to that of case I (AQ or RQ). Applying the AQ method, the tumors in cases I and II show different tomographies. AQ absolute quantization, I_AQ resampled intensity by the AQ method, I_RQ resampled intensity by the RQ method, RQ relative quantization