SPECT	Single photon emission computer tomography
PET	Positron emission tomography
CT	Computer tomography
MRI	Magnetic resonance imaging
PRRT	Peptide receptor radioligand therapy
NEN	Neuroendocrine neoplasm
NET	Neuroendocrine tumor
NEC	Neuroendocrine carcinoma
SSTR	Somatostatin receptor
SSA	Somatostatin analog
SST2A	Somatostatin receptor type 2A
GIS	Gastrointestinal system
GEP	Gastro-entero-pancreatic
CK7	Cytokeratin-7
CK20	Cytokeratin-20
TTF-1	Thyroid transcription factor 1
CEA	Carcinoembryonic antigen
CA19-9	Cancer antigen 19-9
AFP	Alpha-fetoprotein
NSE	Neuron-specific enolase
WHO	World Health Organization
MIBG	Metaiodobenzylguanidine
FDG	Fluorodeoxyglucose
F-DOPA	Fluoro-dihydroxy phenylalanine
VOI	Volume of interest
AP	Antero-posterior
PA	Postero-anterior
RF	Random forest
XGB	Extreme Gradient Boosting
SMOTE	Synthetic Minority Oversampling Technique
PI	Permutation importance
FI	Feature importance