Cardiac Fibrosis and Risk Prediction in Cancer Treatment-Related Cardiotoxicity

Inclusion Criteria: * Stage I-III breast cancer or lymphoma with a \>2 year life expectancy * A treatment plan that includes anthracyclines and/or trastuzumab * Age \>45 years * Able to hold breath for 10 seconds * Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 Exclusion Criteria: * Refusal or inability to provide informed consent * Known heart failure or LVEF \<50% * Heart rate over 100 bpm * Renal dysfunction with GFR \<30 mL/min/1.73m2 * Participants with pacemakers, defibrillators, functioning neurostimulator devices or other implanted electronic devices * Symptomatic claustrophobia * Plans to move within 24 months of enrollment