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Intensity modulated radiotherapy

Intensity modulated radiation therapy is also called IMRT. IMRT radiotherapy machines can precisely target the treatment area by aiming the beams at the tumour from many different directions. IMRT can create an indented (concave) area within the radiotherapy field to avoid high radiation doses to structures that would be damaged by the radiotherapy. The machines also vary the strength of the beams during each dose of treatment so they give very precise doses to specific areas within the tumour. 

Updated: 8 September 2009