MRI scans have been shown to be more effective at detecting subtle variations in tumours which can help doctors measure the progress of ovarian cancer treatment.
A new study by the University of Cambridge has found that MRI scans can identify changes in the structure of a cancer, as they measure the movement of water molecules.
Doctors currently use CT scans to detect any changes in the tumour, but these can only record alterations in its size and thus are not as accurate as the new technique.
"Advanced ovarian cancer can be very difficult to treat, meaning it's vital that patients are monitored closely to ensure they are benefiting from treatment," said Dr Joanna Reynolds, Cancer Research UK's director of centres.
According to the charity, ovarian cancer is the fifth-most common form of the disease among British women and around 126 cases are diagnosed every week.