The MRI scans help decide whether or not you are a good candidate for the MR guided Focused Ultrasound procedure, and there are lots of different criteria that go into whether or not you are a good candidate. Some of the criteria are, that you should have less than five fibroids. They need to be easily accessible to the ultrasound beam, and also the color of the fibroids on the MRI scan is important. They should be darker on a T2 image and also enhanced with contrast.