Characterization of a deformable beating cardiac phantom with real‐time dosimetric capabilities for validation of MRI‐guided heart radiotherapy

This deformable and MRI-compatible cardiac phantom has good MRI contrast, and its heart model exhibits elastic behavior. Its integrated PSDs offer real-time and multi-point dose measurements, and their reliability was demonstrated. We successfully showed that this cardiac phantom enables end-to-end testing for heart radiotherapy on MR-linacs.