This research is being done to determine the safety and feasibility of using a type of radiation guided by magnetic resonance imaging (MRI) and chemotherapy to treat patients with gastric and breast cancer. The name of the radiation machine involved in this study is the MRIdian Linear Accelerator.
Participants must have histologically or cytologically confirmed malignancy requiring radiation
Age 18 years of older
ECOG performance status ≤2 (Karnofsky ≥60%, see Appendix A)
Ability to understand and the willingness to sign a written informed consent document.
History of allergic reactions attributed to gadolinium-based IV contrast
Severe claustrophobia or anxiety
Participants who cannot undergo an MRI
Any other exclusion criteria listed in the specific disease site cohort