CT is a frequently used imaging diagnostic modality; US enables real-time, non invasive, intra-operative visualization of mobile and deformable organs. We have developed a CT/US 3D/3D rigid voxel-based registration method avoiding segmentation of US images enabling intra-operative transfer of planning data and guidance. Image pre-processing is necessary to make the modalities as close as possible (filtering, interface enhancing in CT data, filtering, artefact and acoustic shadow removal in US data). Different similarity measures and optimization methods have been evaluated. This work has been applied to percutaneous kidney surgery
Leroy A., Mozer P., Payan Y., Troccaz J. Rigid registration of freehand 3D ultrasound and CT-scan kidney images. In Proceedings of MICCAI’2004, C. Barillot, D.R. Haynor and P. Hellier (Eds), Springer Verlag, LNCS Series Vol3216, pp837-844 (PDF)
Collaborations: La Pitié-Salpétrière Hospital, Paris (Dr Mozer, Pr Chartier-Kastler – urology dept) – PRAXIM-Medivision
Status: validation on data from a healthy volunteer and comparison to a surface registration algorithm; one thesis defended in 2004 (A. Leroy), one on-going thesis on the clinical side (P. Mozer).
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