IGRT and IMRT - Image Guided Radiotherapy and Intensity Modulated Radiation Therapy

Image Guided Radiotherapy (IGRT) is a treatment technique that takes into account tumour motion. Some tumours are not in a fixed position within the body, meaning their exact location can change slightly from day to day. IGRT involves determining the position of the tumour everyday before giving any radiotherapy treatment and then altering the settings / treatment positioning if the tumour has moved.