20 May 2019 Intensity-modulated radiation therapy (IMRT) offers greater precision, as it adapts the shape of the radiation beams to the form of the tumour during the treatment session. It can simultaneously: Apply a higher dose of radiation to the target site; Decrease the effects of radiation on neighbouring normal tissue. It is also among the techniques associated with adapted therapy and online planning. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.