Radiotherapy is an important treatment modality in the management of cancers of the uterine cervix. About half of patients with cervical cancer receive definitive radiotherapy in the course of their disease. Radiotherapy is most often administered as a combination of external beam radiotherapy (EBRT) and brachytherapy (BT). In the late 90's a major breakthrough in cervical cancer radiotherapy took place with the introduction of MR image guidance of BT. By performing MR imaging before each BT implant it is possible adapt the dose given by BT to the anatomy of each individual patient taking into account not only the position of organs at risk (bladder, rectum and sigmoid) but also the tumour regression induced by the preceding EBRT and chemotherapy.