Evaluation of Targeted Radionuclide Therapy of Lu-177 PSMA in Patients With Compromised Renal and/or Bone Marrow Function

Primary Objectives • To determine the personalized radiation dose to tumors and critical organs of participants with compromised renal and / or bone marrow function. Secondary Objectives * To compare target radiation doses based on varying SPECT scan duration. Plot the variability in target radiation dose versus scan duration. * To compare the image quality and dosimetry results when considering the low, high, and both energy peaks of Lu-177. * To compare target radiation doses based on multiple imaging time points versus a single time point and identify which time point is most suited for this evaluation. * To compare target radiation doses derived from organ versus voxel dosimetry calculation.