Nuclear medicine imaging can be performed using several different techniques one example is scintigraphy where the radiation captured creates two dimensional images. Diagnostic techniques in nuclear medicine use radioactive tracers which emit gamma rays from within the body these tracers are generally short lived isotopes linked to chemical compounds which permit specific physiological processes to be scrutinised. In this chapter we describe the role of nuclear medicine imaging in patient care and review how these imaging approaches contribute to the diagnosis of disease to the assessment of the disease related risk to patients and to individualizing treatment strategies for improving patient outcomes and survival. Nuclear medicine and radiology are the whole of medical techniques that involve radiation or radioactivity to diagnose treat and prevent disease while radiology has been used for close to a century nuclear medicine began approximately 50 years ago
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