Fig. 1
From: Potential PET tracers for imaging of tumor-associated macrophages
The main biomarkers expressed by TAM phenotypes, for which PET tracers are available. For each biomarker, the available PET tracers are indicated. CSF-1R: colony stimulating factor 1 receptor; CD: cluster of differentiation; CCR2: C–C chemokine receptor type 2; FR: folate receptor; Arg1: arginase 1; IL: interleukin; TNF-α: tumoral necrose factor α; TGF-β: transforming growth factor β