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Abstract #4125

Role of Intravoxel Incoherent Motion MR Imaging in Evaluating Different Types of Uterine Fibroids in Patient Selection Before MR-Guided Focused Ultrasound Ablation

Rong Rong1, Juan Wei2, Xuedong Yang1, Jing Liu1, Ying Zhu1, Bilgin Keserci3, Xiaoying Wang1

1Radiology Department, Peking University First Hospital, Beijing, China; 2Philips Research Asia, Shanghai, China; 3Philips Healthcare South Korea, Seoul, Korea

Hypervascular fibroids are difficult to treat because the blood vessels effectively carry heat away from the treatment area, resulting in subtherapeutic temperatures within the target tissue in MR-guided focused ultrasound ablation. So it is important to differentiate type 3 fibroids. Perfusion fraction and diffusion coefficient derived from different b-value combinations reflect vascularity and perfusion in different types of fibroids and will help to differentiate type 1, type 2 and type 3 fibroids, especially the type 3 fibroids. This may improve the accuracy of MR screening before MR-guided focused ultrasound Ablation and will help to exclude the type 3 fibroids.