What should you know about IGRT radiotherapy?

IGRT stands for image-guided radiotherapy. Before, and sometimes during, a treatment session, the team takes images to check the tumour position and the position of nearby organs. The machine or treatment plan may then be adjusted to match the planned target. This can be useful when breathing, digestion, bladder filling, or ordinary movement changes the location of tissues.

You may have a mould, mask, or other support to help you keep the same position. IGRT is a way of delivering external-beam radiotherapy; it does not describe a separate type of radiation. Your oncologist chooses the imaging method and schedule according to the body area and treatment plan.

At planning appointments, tell the team about implants, previous radiotherapy, medicines, pregnancy, or difficulty lying still. On treatment days, wear the clothing advised by the centre and follow instructions about eating, drinking, or bladder preparation. The session includes positioning and checks before radiation is delivered; the radiation itself is not felt.

Skin changes, tiredness, or symptoms in the treated area can develop during or after a course. Keep the treatment area clean, avoid products unless your team approves them, and record changes so they can be discussed. IGRT may be used for cancers such as [Brain Tumour](/conditions/brain-tumour/) or [Breast Cancer](/conditions/breast-cancer/), depending on the plan.

Contact your radiotherapy team promptly if you develop worsening pain, repeated vomiting, new weakness, confusion, difficulty breathing, trouble swallowing, or a skin reaction that is weeping or rapidly worsening. Seek urgent help for severe breathing difficulty, a seizure, sudden loss of movement, or a sudden change in consciousness. The right response depends on the treated area and your wider treatment, so use the emergency number provided by your centre when symptoms are severe.

Which images will be taken, and will my position be adjusted during treatment? What should I do about breathing or bladder instructions? Which side effects should I report the same day, and whom should I call outside appointment hours?