Inclusion Criteria:  Twenty patients with histologically proven treatment-naïve, therapy-refractory or relapsed blood cancers meeting the below criteria will be included:  Indolent B- or T-cell Non-Hodgkin lymphoma (including cutaneous lymphomas) and measurable disease according to Lugano criteria MGUS/SMM according to IMWG definitions Age ≥18 Negative serum pregnancy test for female volunteers of childbearing age and potential (as defined by MSKCC Standards & Guidelines) from assays obtained <2 weeks prior to study enrollment/intervention; or negative urine pregnancy test performed on the day of intervention MSKCC patients  Exclusion Criteria:  Breast-feeding History of renal functional disorders (chronic kidney disease with eGFR<30) Refusal or inability to tolerate the scanning procedure (e.g., due to claustrophobia) CNS lymphoma