RecruitingDiagnostic testHepQuant: Study to Assess the Role of Blood-based Biomarkers and Quantitative MR Imaging for Patients Receiving Radiation Therapy for Liver CancerThis is a pilot and feasibility study assessing the role of quantitative multiparametric MRI and blood-based biomarkers for the measurement of liver function in patients receiving radiation therapy for liver cancer, including hepatocellular carcinoma (HCC), cholangiocarcinoma, or liver metastases regardless of primary histology, that are undergoing photon radiation either in the de-novo or re-irradiation setting. The goal of this study is to prospectively evaluate the feasibility of using quantitative multiparametric MRI to monitor liver function at baseline and following liver radiation therapy.