Technetium-99m is a radioisotope widely utilized as a medical tracer in nuclear imaging.
Explain why a radioactive tracer that emits gamma radiation with a short half-life (such as 6 hours) is highly advantageous for diagnostic imaging compared to a tracer that emits β−\beta^{-}β− radiation with a long half-life (such as several days).
A gamma camera is used to detect the radiation emitted from the patient and reconstruct an image. Name and describe the functions of the three main hardware components of a gamma camera that process the gamma photons before they reach the computer.
25 exam-style questions on OCR A A Level Physics Medical imaging, covering Using X-rays, Diagnostic methods in medicine, and Using ultrasound. Each one has a worked solution and a mark scheme showing where the marks go.