PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY
Gamma camera scanning of the head of a person suffering from secondary bone cancer. The gamma camera (right) is a diagnostic device used widely in the detection and management of cancers - often as a means of detecting secondary disease after a patient has received treatment for their primary cancer. The colour-coded image at left represents the position and intensity of radiation emitted from a short-lived radioactive tracer that is metabolized or is concentrated in the part of the body under investigation - in this case, bone. The radioisotope concentrates more strongly in cancerous than in normal bone and this is represented by the red areas on the image.
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