This treatment uses a radiotherapy machine that takes pictures or images during your treatment. The pictures show any movement of the tumour. The information from the pictures is used to adjust the radiotherapy treatment area during your treatment. This means that as the tumour moves, it’s possible to make sure it’s fully treated.
4D radiotherapy is particularly helpful for tumours that are in an area of the body that moves during the time you’re having treatment. For example, tumours in the lung that move as you breathe. This treatment is not available in all radiotherapy centres.