Figure 3
From: PET Radiomics in NSCLC: state of the art and a proposal for harmonization of methodology

Example of tumor contouring using in (a) a threshold method at 50% of SUVmax and (b) a method based on an absolute SUV cut-off of 2.5. The ROI identified by using the absolute SUV cut-off of 2.5 is greater than that identified by the threshold method, as shown by axial (top), sagittal (right), and coronal (left) images (same slices).