Gamma-ray emission detection via tissue localization

The phrase "Gamma-ray emission detection via tissue localization" does not refer to a single, well-defined molecular or cellular target (such as a receptor, enzyme, or transporter), but rather describes a general physical and medical imaging process. Gamma-ray emission detection is the technology used in nuclear medicine—such as positron emission tomography (PET) and single-photon emission computed tomography (SPECT)—to visualize the distribution of radioactive tracers within living tissue by detecting gamma rays emitted during radioactive decay[1][3]. In this context, "tissue localization" refers to the spatial mapping of tracer uptake, which allows for anatomical and functional imaging but does not identify a specific biological molecule target. The entire process is a technological application, not a biological entity or drug target. If you are interested in a molecular target (e.g., a receptor or enzyme imaged by PET/SPECT), please specify the actual biological molecule (e.g., glucose transporter, somatostatin receptor, etc.), not the imaging modality itself.