Pilot Study of Multi-Modality Imaging in Patients With Hematologic Malignancies

Inclusion Criteria: * Diagnosis of hematologic malignancy and fitting into one of the following categories: * Newly diagnosed and/or day 14 post-induction chemotherapy * Relapsed, including relapse after hematopoietic cell transplant * Planned hematopoietic cell transplant (if enrolling at "close") or within 100 days post hematopoietic cell transplant (if enrolling post-transplant) with a preparative regimen that includes either total marrow irradiation (TMI) or total body irradiation (TBI) * Undergoing natural killer cell therapies (with or without subsequent transplant) * Aged 18 years and older * Not pregnant - women of childbearing potential will have a confirmatory pregnancy test prior to each imaging per routine procedures * Adequate renal function (estimated glomerular filtration rate \> 60 ml/min) as determined by a serum creatinine level performed as a part of standard of care within 7 days of imaging * Able and willing to provide written consent Exclusion Criteria: * Otherwise eligible patients meeting one or more of the contraindicates for an MRI, may enroll in the study without undergoing the MRI: * ferromagnetic implants * history of shrapnel or shot gun injury * too large to fit in the magnet (approximate body mass index ≥ 40) * cardiac pacemakers or other implanted devices that are not MR-compatible * claustrophobia * large tattoos