• A. Roche, X. Pennec, G. Malandain, and N. Ayache. Rigid Registration of 3D Ultrasound with MR Images: a New Approach Combining Intensity and Gradient Information. IEEE Transactions on Medical Imaging, 20(10):1038--1049, October 2001. [bibtex-entry]



• X. Pennec, N. Ayache, A. Roche, and P. Cachier. Non-rigid MR/US registration for tracking brain deformations. In IEEE Computer Society Press, editor, Proc of Int. Workshop on Medical Imaging and Augmented Reality (MIAR 2001), 10-12 June 2001, Shatin, Hong Kong, pages 79--86, June 2001. [bibtex-entry]



• A. Roche, X. Pennec, M. Rudolph, D. P. Auer, G. Malandain, S. Ourselin, L. M. Auer, and N. Ayache. Generalized Correlation Ratio for Rigid Registration of 3D Ultrasound with MR Images. In A.M. DiGioia and S. Delp, editors, Proc. of the 3rd Int. Conf. on Medical Image Computing and Computer-Assisted Intervention (MICCAI'00), volume 1935 of Lecture Notes in Computer Science, Pittsburgh, Pennsylvanie USA, pages 567--577, October 11-14 2000. Note: Published in IEEE TMI 20(10), oct. 2001, p. 25-31. [bibtex-entry]



• A. Roche, X. Pennec, G. Malandain, N. Ayache, and S. Ourselin. Generalized Correlation Ratio for Rigid Registration of 3D Ultrasound with MR Images. Research Report RR-3980, INRIA, July 2000. Note: Published in IEEE TMI 20(10), oct. 2001, p. 25-31. [bibtex-entry]

• X. Pennec, P. Cachier, and N. Ayache. Tracking Brain Deformations in Time-Sequences of 3D US Images. Pattern Recognition Letters - Special Issue on Ultrasonic Image Processing and Analysis, 24(4-5):801--813, February 2003. [bibtex-entry]



• N. Ayache, X. Pennec, and P. Cachier. Fusing 3-D ultrasound and MRI for real-time image-guided neurosurgery. In Medical Physics and Clinical Engineering Conference, 2001. Note: Invited talk, Physica Medica (European journal of Medical Physics) 17(3). [bibtex-entry]



• X. Pennec, N. Ayache, A. Roche, and P. Cachier. Non-rigid MR/US registration for tracking brain deformations. In IEEE Computer Society Press, editor, Proc of Int. Workshop on Medical Imaging and Augmented Reality (MIAR 2001), 10-12 June 2001, Shatin, Hong Kong, pages 79--86, June 2001. [bibtex-entry]



• X. Pennec, P. Cachier, and N. Ayache. Tracking brain deformations in time sequences of 3D US images. In M.I. Insana and R.M. Leahy, editors, Proc. of IPMI'01, number 2082 of Lecture Notes in Computer Science, Davis, CA, USA, pages 169--175, June 2001. Springer Verlag. [bibtex-entry]



• X. Pennec, P. Cachier, and N. Ayache. Understanding the ``Demon's Algorithm'': 3D Non-Rigid registration by Gradient Descent. In C. Taylor and A. Colchester, editors, Proc. of 2nd Int. Conf. on Medical Image Computing and Computer-Assisted Intervention (MICCAI'99), volume 1679 of Lecture Notes in Computer Science, Cambridge, UK, pages 597--605, September 1999. Springer Verlag. [bibtex-entry]



• X. Pennec, P. Cachier, and N Ayache. Tracking Brain Deformations in Time-Sequences of 3D US Images. Research report RR-4091, INRIA, December 2000. [bibtex-entry]



• P. Cachier, X. Pennec, and N. Ayache. Fast Non-Rigid Matching by Gradient Descent: Study and Improvements of the Demons Algorithm. Research Report 3706, INRIA, June 1999. [bibtex-entry]

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