Assessment of Ovarian Movement on Consecutive Pelvic MRI Scans for Accurate Radiotherapy Planning in Patients with Gynaecological Malignancies

Nicky HGM Peters^{1, 2}, Gail Horan³, Deborah Gregory³, Li Tee Tan³, Charlotte Coles³, Andrew J. Patterson², Evis Sala²

With the technical advances in radiotherapy, treatment can be planned on MRI examinations on which the ovaries can be clearly depicted. We assessed the extent of ovarian movement on consecutive pelvic MRI examinations in patients that underwent pelvic radiotherapy for a gynaecological malignancy to provide a safety volume around the ovaries accounting for ovarian movement. Adding a safety volume around the ovaries of 32 cm3 and 57 cm3 for the left and right ovary respectively could reduce the high radiation dose to the ovaries during pelvic radiotherapy and resulting infertility and premature menopause could possibly be avoided.