Scale-Space and Edge Detection Using Anisotropic Diffusion
IEEE Transactions on Pattern Analysis and Machine Intelligence
Ultrasound Probe Tracking for Real-Time Ultrasound/MRI Overlay and Visualization of Brain Shift
MICCAI '99 Proceedings of the Second International Conference on Medical Image Computing and Computer-Assisted Intervention
Generalized Correlation Ratio for Rigid Registration of 3D Ultrasound with MR Images
MICCAI '00 Proceedings of the Third International Conference on Medical Image Computing and Computer-Assisted Intervention
Ultrasound/MRI Overlay with Image Warping for Neurosurgery
MICCAI '00 Proceedings of the Third International Conference on Medical Image Computing and Computer-Assisted Intervention
Image Registration by Maximization of Combined Mututal Information and Gradient Information
MICCAI '00 Proceedings of the Third International Conference on Medical Image Computing and Computer-Assisted Intervention
An Image Registration Approach to Automated Calibration for Freehand 3D Ultrasound
MICCAI '00 Proceedings of the Third International Conference on Medical Image Computing and Computer-Assisted Intervention
Computer Vision and Image Understanding - Special issue on nonrigid image registration
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The displacement of brain tissue during neurosurgery is a significant source of error for image-guidance systems. We are investigating the use of a computational model to predict brain shift and warp preoperative MR images accordingly. 3D ultrasound appears to be a valid means of acquiring intraoperative images to use as sparse data for guiding the model calculations. We present here a study of edge detection in MR and ultrasound images to investigate the accuracy of our ultrasound system and explore methods of extracting sparse data. Ultrasound images are acquired prior to deformation and compared to their corresponding oblique MR/CT images. Results from phantom images show misalignment by an average of 2.2 卤 1.67 degrees, 0.90 卤 0.82 mm in x, and 0.87 卤 0.87 mm in y. Patient images are misaligned by an average of 2.2 卤 1.4 degrees, 1.24 卤 0.89 mm in x, and 0.97 卤 0.87 mm in y.