- Review
Development of Radiotracers for Imaging of the PD-1/PD-L1 Axis
- Fabian Krutzek,
- Klaus Kopka and
- Sven Stadlbauer
Immune checkpoint inhibitor (ICI) therapy has emerged as a major treatment option for a variety of cancers. Among the immune checkpoints addressed, the programmed death receptor 1 (PD-1) and its ligand PD-L1 are the key targets for an ICI. PD-L1 has...

