BSIP LECA / SCIENCE PHOTO LIBRARY BSIP LECA / SCIENCE PHOTO LIBRARY
Radiotherapy. Man lies on a table as he receives a dose of radiation from a radiotherapy machine (upper left) to treat cancer. On the far wall is a compass dial used to control the position of the machine, which rotates around the patient. Radiotherapy destroys cancer tissue by passing a beam of intense radiation (such as X- rays) through the tumour. The beam is aimed from several different angles, each time striking the tumour but passing through a different part of the body. This minimises damage to surrounding tissue. The procedure is painless and takes just several minutes. Side-effects like nausea and fatigue may develop later.
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