We used SUV3.0 as the ROI threshold to calculate the WBMTV and WBTLG in 74 PTCL patients without 6 ALK+ALCL patients and the cut-off values were 169.5 cm3 and 746.1 by retrospective ROC analysis, respectively. This evidence concerns the gene ALK and mature T-cell and NK-cell non-Hodgkin lymphoma.