Molecular Imaging of Gastrin Releasing Peptide Receptors Using Labeled Technetium-99m DB8

The overall goal is to study the effectiveness of SPECT imaging prostate cancer and breast cancer patients Using technetium-99m labeled DB8. Phase I of the study: Biodistribution of 99mTc-DB8 in patients with prostate cancer and breast cancer. The main objectives of the study: 1. To evaluate the distribution of 99mTc-DB8 in normal tissues and tumors in patients with prostate cancer and breast cancer at different time intervals. 2. To evaluate dosimetry of 99mTc-DB8 based on the pharmacokinetic parameters of the drug after a single intravenous administration. 3. To study the safety of use and tolerability of the drug 99mTc-DB8 after a single intravenous administration in a diagnostic dosage. Additional research tasks: 1\. To conduct a comparative analysis of the diagnostic information obtained in the visualization of prostate cancer and breast cancer by SPECT using 99mTc-DB8 with data obtained by CT and/or MRI and/or ultrasound examination and immunohistochemical (IHC) research of postoperative material. Methodology: Open-label, exploratory, single centre study. The subjects will receive a single injection of the labeled tracer.