89Zr-Trastuzumab PET/CT in Subjects With Previously Treated HER2-Positive Solid Tumors Scheduled to Receive Treatment With MT-5111

"-To minimize uptake of the 89Zr-trastuzumab in normal tissues, immediately prior to planned 89Zr-trastuzumab injection patients will receive a 50 mg dose of cold unlabeled trastuzumab intravenously (IV). The administration of a fixed small dose of unlabeled antibody to improve tumor-to-normal-tissue (T/N) uptake of the radiolabeled antibody is standard in this type of imaging procedure."