Out‐of‐beam artifact suppression in charged nuclear fragment based carbon‐ion radiotherapy monitoring

Clinically irrelevant changes were shown to potentially impede carbon-ion treatment monitoring by tracking of charged nuclear fragments. However, positioning several mini-trackers around the patient, which monitor the treatment from different perspectives, was found to be the key to the identification and suppression of artifacts from anatomical changes outside of the region accessed by carbon-ion beams. This is implemented in the detection system of an ongoing clinical trial.