20 May 2019 The following is done before guided image radiotherapy (IGRT), before each treatment: Suitable volumetric images; Confirmation and / or correction of target volume positioning. This means that treatment is adapted prior to each session. This technique can make corrections based on tumour movements during the session. This may be the case of a lung tumour moving as the patient breathes, for example. Imaging-guided radiation therapy has introduced greater precision of treatments . The margins around the radiation targets are narrower, i.e. minimal margins of normal tissues surrounding the tumour are possible. A greater reduction in the dose applied outside the target site is achieved. As a result, this radiotherapy technique: Maximises the dose of radiation applied to the target; Minimises it in normal neighbouring organs and tissue. Making it possible to: Reduce the necessary safety margins; Increase the dose of radiation applied to the tumour without compromising normal organs and tissue. Technological developments in radiotherapy techniques, including imaging-guided radiotherapy, have made the concepts of tailored therapy and online planning possible. 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.
