[68Ga]Ga-FAPI Total Body PET/CT for Better and Faster Imaging in Cancer

This study is testing a new type of full-body PET/CT scan using a tracer called [68Ga]Ga-FAPI-46 — which lights up cancer tissue by targeting proteins expressed around tumors — to see if it provides better and faster imaging than standard scans for people with advanced melanoma who are about to start immunotherapy. **You may be eligible if...** - You are 18 or older - You have confirmed advanced or metastatic melanoma (spread to other organs) - Your cancer is visible on standard scans and is considered inoperable - You are considered medically suitable for immunotherapy - You can read and understand Danish to give informed consent **You may NOT be eligible if...** - You have ocular (eye) or mucosal melanoma - You have another active cancer at the same time - You have previously received immunotherapy for your cancer - You are pregnant or breastfeeding - You weigh more than 140 kg - You have had an allergic reaction to similar imaging tracers Talk to your doctor to see if this trial is right for you.