Final answer:
TFTs are primarily found in Digital Radiography (DR) systems. They are used to capture and process X-ray images digitally, which provides benefits such as better image quality and easier storage and retrieval.
Step-by-step explanation:
TFTs, or thin-film transistors, are a type of transistor used in many digital systems. In the context of medical imaging, TFTs are prominently used in Digital Radiography (DR). This technology is employed to capture and process X-ray images. Digital radiography systems use a flat panel detector that contains millions of tiny TFTs that capture the image produced when X-rays pass through a patient's body. This digital method replaces traditional photographic film with a digital receptor, providing improvements in image storage, retrieval, and image quality.
Other imaging techniques mentioned, such as Computed Tomography (CT), Magnetic Resonance Imaging (MRI), and Positron Emission Tomography (PET), use different technologies for imaging purposes. CT scans use X-rays and computer technology to create detailed cross-sectional images. MRI uses a strong magnetic field and radio waves to generate images of structures within the body. PET scans use radiopharmaceuticals to observe metabolic processes in the body.