IMRT (Intensity Modulated Radiation Therapy) is an advanced form of radiotherapy in which dose is targeted on the tumour volume by the use of multiple beams of radiation from a number of directions. The technique minimises the dose to healthy tissue and its wider adoption in the UK is being strongly encouraged.

A nationwide audit was carried out in 2009 to provide a check for centres already using IMRT and to assist those in the process of implementing it. The level of participation in the audit was extremely high, with a total of 57 out of a potential 62 centres taking part.