Contour-Based TVUS-MR Image Registration for Mapping Small Endometrial Implants

We propose a multi-modal image registration and fusion method to cope with the limitations of Magnetic Resonance MR and Transvaginal Ultrasound TVUS imaging in observing abdominal endometrial implants. Our method facilitates the transfer of two types of information from a 2D TVUS image to a 2D MR slice:i¾?1i¾?the location and shape of small implants andi¾?2i¾?the implants' depth of infiltration in the host tissue. Our registration method uses contour correspondences through a novel variational one-step deformable Iterative Closest Point ICP method. The proposed method compared favorably with classical ICP and Thin-Plate Spline Robust Point Matching TPS-RPM on several datasets.

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