Experimental: CD38-positive multiple myeloma

Patients with CD38 positive multiple myeloma with be enrolled. Patients will undergo pretreatment evaluation with standard of care diagnostic tests, as well as experimental 89Zr-daratumumab PET/CT. Patients will then undergo a course of standard of care therapy as defined by a medical oncologist. Following therapy, patients will repeat standard of care diagnostic tests, as well as experimental 89Zr-daratumumab PET/CT. Data analysis will be performed to evaluate 89Zr-daratumumab against standard of care diagnostic tests for the detection and localization of active disease before and after therapy.