RecruitingRadiation therapyBiopsy After Radioembolization to Identify Changes in Tumor Cells From the RadiationThe purpose of this study is to study the way radioembolization works by collecting biopsy samples of participants' tumors after the procedure. This research may improve the way that radioembolization is performed, which could help people whose cancer has spread to the liver. The research may also provide information about how tumors respond to radioembolization.