ABSTRACT
Medical diagnosis and treatment have been greatly promoted by medical imaging. Specially, medical research has been completely regenerated by the new levels of analysis that medical imaging has introduced, from the study of individual biomolecules microscopically to the actual visualization of living tissues. Generally, structural imaging providing only static images of tissue and organ states has been enhanced and evolved with functional imaging that provides almost real-time insights of the changes in metabolism, blood flow, and regional chemical composition. Next-generation imaging technologies, as in vivo subsurface imaging of tissue for early detection of disease, will combine macroscopic and microscopic imaging advances while providing also functional information. For measuring biological samples with terahertz (THz) radiation, more aspects should be considered except the THz imaging technique that will be used. THz systems can be divided into two main categories based on the THz source used: THz pulsed and continuous wave systems.
