N
Nicholas Ayache
Researcher at French Institute for Research in Computer Science and Automation
Publications - 639
Citations - 47063
Nicholas Ayache is an academic researcher from French Institute for Research in Computer Science and Automation. The author has contributed to research in topics: Segmentation & Image registration. The author has an hindex of 97, co-authored 624 publications receiving 43140 citations. Previous affiliations of Nicholas Ayache include University of Las Palmas de Gran Canaria & Mauna Kea Technologies.
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Definition of a four-dimensional continuous planispheric transformation for the tracking and the analysis of left-ventricle motion.
TL;DR: A 4-D polar transformation is defined to describe the left-ventricle (LV) motion and a method is presented to estimate it from sequences of 3-D images and a demonstration of its feasability on a series of gated SPECT sequences.
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An augmented reality system to guide radio-frequency tumour ablation
TL;DR: An augmented reality system for hepatic therapy guidance that superimposes in real‐time 3D reconstructions and a virtual model of the needle on external views of a patient and is highly accurate and enables the surgeon to reach a target in less than 1 minute on average.
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Explainable cardiac pathology classification on cine MRI with motion characterization by semi-supervised learning of apparent flow
TL;DR: An explainable, simple and flexible model for pathology classification based on a novel approach to extract image derived features to characterize the shape and motion of the heart, comparable to that of the state-of-the-art.
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Uniform Distribution, Distance and Expectation Problems for Geometric Features Processing
Xavier Pennec,Nicholas Ayache +1 more
TL;DR: The basic mathematical framework required to avoid paradoxes is established and three basic problems are analyzed: what is a random distribution of features, how to define a distance between features and what is the “mean feature” of a number of feature measurements.