Long-Term Retention of ¹⁷⁷Lu/^177mLu-DOTATATE in Patients Investigated by γ-Spectrometry and γ-Camera Imaging

Abstract

At approximately 5-7 wk after injection, there was a measureable amount of (177)Lu-DOTATATE in patients, which is mainly governed by retention in tumors. For tumor dosimetry, imaging at a later time than the routinely used 7 d may be warranted. The contribution to the absorbed dose from the radionuclide impurity of (177m)Lu was negligible.