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The registration of intraoperative ultrasound (US) images with preoperative magnetic resonance (MR) images is a challenging problem due to the difference of information contained in each image modality. To overcome this difficulty, we introduce a new probabilistic function based on the matching of cerebral hyperechogenic structures. In brain imaging, these structures are the liquid interfaces such as the cerebral falx and the sulci, and the lesions when the corresponding tissue isdoi:10.1155/2012/531319 pmid:22315583 pmcid:PMC3270552 fatcat:6keutkhcuzh45dxbg3clwl2abi