MR-guided radiotherapy is a cutting edge treatment modality that combines high precision radiation treatment with magnetic resonance (MR) imaging in one machine. MR imaging shows the tumor and healthy tissues in great detail. MR-guided radiotherapy allows the treatment team to adjust the treated area to daily changes in the patient’s anatomy and track the tumor in real time with high accuracy. This novel treatment  modality results in better targeting of the tumor and improved sparing of healthy tissues.