18F-FDG PET; AT, adaptive thresholding methods; CAR, chimeric antigen receptor; CT, computed tomography; DICOM, Digital Imaging and Communications in Medicine; DLBCL, Diffuse large B-cell lymphoma; EANM, European Association of Nuclear Medicine; EARL, EANM Research Ltd.; FDG, fluorodeoxyglucose; HL, Hodgkin lymphoma; IMG, robustness across image reconstruction methods; IQR, interquartile range; LBCL, Large B-cell lymphoma; LDH, lactate dehydrogenase; MAN, clinician based evaluation using manual segmentations; MATV, Metabolic active tumor volume; MIP, Maximum Intensity Projection; MUST, Multiple SUV Thresholding; Metabolic tumor volume; NHL, Non-Hodgkin lymphoma; Non-Hodgkin lymphoma; OBS, robustness across observers; OS, overall survival; PD-L1, programmed cell death ligand-1; PET segmentation; PET, positron emission tomography; PFS, progression free survival; PROG, progression vs non-progression; PTCL, Peripheral T-cell lymphoma; PTLD, Post-transplant lymphoproliferative disorder; QS, quality scores; SOFT, robustness across software; SUV thresholding; SUV, standardized uptake value; Segmentation software; TCL, T-cell lymphoma; UMCG, University Medical Center Groningen; VOI, volume of interest; cc, cubic centimeter