AI	Artificial intelligence
AUC	Area under the curve
CAF	Cancer-associated fibroblast
CT	Computed tomography
DPP4	Dipeptidyl peptidase IV
EANM	European Association of Nuclear Medicine
EMT	Epithelial–mesenchymal transition
FAP	Fibroblast activation protein
FAPI	Fibroblast activation protein inhibitor
FAP-RADS	Fibroblast Activation Protein Reporting and Data System
FDG	Fluorodeoxyglucose
HCC	Hepatocellular carcinoma
HNSCC	Head and neck squamous cell carcinoma
ICC	Intrahepatic cholangiocarcinoma
LAFOV	Long axial field-of-view
MRI	Magnetic resonance imaging
NSCLC	Non-small cell lung cancer
PDAC	Pancreatic ductal adenocarcinoma
PET	Positron emission tomography
PRISMA-ScR	Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews
QA	Quality assurance
QC	Quality control
RLT	Radioligand therapy
SiPM	Silicon photomultiplier
SNMMI	Society of Nuclear Medicine and Molecular Imaging
SPECT	Single photon emission computed tomography
SUV	Standardized uptake value
SUVmax	Maximum standardised uptake value
TBR	Tumor-to-background ratio
TME	Tumor microenvironment