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4013
Email

Projects

Projects as Member

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Manifold-Valued Graph Neural Networks

Geometry-aware, data-analytic approaches improve understanding and assessment of pathophysiological processes. We will derive a new theoretical framework for deep neural...

Manifold-Valued Graph Neural Networks
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Morphological Scoring of Disease States

The understanding of anatomical shapes as well as their variations over time or among individuals is crucial in medical diagnostics and therapy. Riemannian shape...

Morphological Scoring of Disease States
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Treating Osteoarthritis in Knee with Mimicked Interpositional Spacer

One aim of this project is to analyze a large set of medical image data with respect to the anatomy of the knee joint. The aim is to determine the variation in shape of...

Treating Osteoarthritis in Knee with Mimicked Interpositional Spacer

Publications

2023
Sasaki Metric for Spline Models of Manifold-Valued Trajectories Computer Aided Geometric Design, Vol.104, 2023 Esfandiar Navayazdani, Felix Ambellan, Martin Hanik, Christoph von Tycowicz BibTeX
arXiv
DOI
Ambellan, Felix
2022
A Soft-Correspondence Approach to Shape-based Disease Grading with Graph Convolutional Networks Proceedings of Machine Learning Research, pp. 85-95, Vol.194, 2022 Julius Mayer, Daniel Baum, Felix Ambellan, Christoph von Tycowicz PDF
BibTeX
Ambellan, Felix
Dynamic pressure analysis of novel interpositional knee spacer implants in 3D-printed human knee models Scientific Reports, Vol.12, 2022 Korbinian Glatzeder, Igor Komnik, Felix Ambellan, Stefan Zachow, Wolfgang Potthast PDF
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DOI
Ambellan, Felix
Efficient Riemannian Statistical Shape Analysis with Applications in Disease Assessment Doctoral thesis, Freie Universität Berlin, Christof Schütte, Christoph von Tycowicz (Advisors), 2022 Felix Ambellan PDF
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DOI
URN
Ambellan, Felix
ICLR 2022 Challenge for Computational Geomerty & Topology: Design and Results Proceedings of Topology, Algebra, and Geometry in Learning, pp. 269-276, Vol.196, Proceedings of Machine Learning Research, 2022 Adele Myers, Saiteja Utpala, Shubham Talbar, Sophia Sanborn, Christian Shewmake, Claire Donnat, Johan Mathe, Umberto Lupo, Rishi Sonthalia, Xinyue Cui, Tom Szwagier, Arthur Pignet, Andri Bergsson, Søren Hauberg, Dmitriy Nielsen, Stefan Sommer, David Klindt, Erik Hermansen, Melvin Vaupel, Benjamin Dunn, Jeffrey Xiong, Noga Aharony, Itsik Pe’er, Felix Ambellan, Martin Hanik, Esfandiar Navayazdani, Christoph von Tycowicz, Nina Miolane PDF
BibTeX
arXiv
Ambellan, Felix
Landmark-free Statistical Shape Modeling via Neural Flow Deformations Medical Image Computing and Computer Assisted Intervention - MICCAI 2022, Vol.13432, Lecture Notes in Computer Science, 2022 David Lüdke, Tamaz Amiranashvili, Felix Ambellan, Ivan Ezhov, Bjoern Menze, Stefan Zachow BibTeX
DOI
arXiv
Ambellan, Felix
On Gradient Formulas in an Algorithm for the Logarithm of the Sasaki Metric ZIB-Report 22-12 Esfandiar Nava-Yazdani, Martin Hanik, Felix Ambellan, Christoph von Tycowicz PDF
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URN
Ambellan, Felix
SHREC 2022 Track on Online Detection of Heterogeneous Gestures Computers and Graphics, Vol.107, pp. 241-251, 2022 Ariel Caputo, Marco Emporio, Andrea Giachetti, Marco Cristani, Guido Borghi, Andrea D'Eusanio, Minh-Quan Le, Hai-Dang Nguyen, Minh-Triet Tran, Felix Ambellan, Martin Hanik, Esfandiar Navayazdani, Christoph von Tycowicz BibTeX
arXiv
DOI
Ambellan, Felix
2021
Establishment of a rolling-sliding test bench to analyze abrasive wear propagation of different bearing materials for knee implants Applied Sciences, 11(4), 2021 Jessica Hembus, Felix Ambellan, Stefan Zachow, Rainer Bader BibTeX
DOI
Ambellan, Felix
Geodesic B-Score for Improved Assessment of Knee Osteoarthritis Proc. Information Processing in Medical Imaging (IPMI), pp. 177-188, Lecture Notes in Computer Science, 2021 (preprint available as ZIB-Report 21-09) Felix Ambellan, Stefan Zachow, Christoph von Tycowicz PDF (ZIB-Report)
BibTeX
arXiv
DOI
Ambellan, Felix
Morphomatics: Geometric morphometrics in non-Euclidean shape spaces 2021 Felix Ambellan, Martin Hanik, Christoph von Tycowicz BibTeX
DOI
Ambellan, Felix
Rigid Motion Invariant Statistical Shape Modeling based on Discrete Fundamental Forms Medical Image Analysis, Vol.73, 2021 Felix Ambellan, Stefan Zachow, Christoph von Tycowicz BibTeX
DOI
arXiv
Ambellan, Felix
Towards novel osteoarthritis biomarkers: Multi-criteria evaluation of 46,996 segmented knee MRI data from the Osteoarthritis Initiative PLOS One, 16(10), 2021 Alexander Tack, Felix Ambellan, Stefan Zachow BibTeX
DOI
Ambellan, Felix
Towards novel osteoarthritis biomarkers: Multi-criteria evaluation of 46,996 segmented knee MRI data from the Osteoarthritis Initiative (Supplementary Material) PLOS One, 16(10), 2021 Alexander Tack, Felix Ambellan, Stefan Zachow BibTeX
DOI
Ambellan, Felix
VerSe: A Vertebrae labelling and segmentation benchmark for multi-detector CT images Medical Image Analysis, Vol.73, 2021 Anjany Sekuboyina, Malek E. Husseini, Amirhossein Bayat, Maximilian Löffler, Hans Liebl, Hongwei Li, Giles Tetteh, Jan Kukačka, Christian Payer, Darko Štern, Martin Urschler, Maodong Chen, Dalong Cheng, Nikolas Lessmann, Yujin Hu, Tianfu Wang, Dong Yang, Daguang Xu, Felix Ambellan, Tamaz Amiranashvili, Moritz Ehlke, Hans Lamecker, Sebastian Lehnert, Marilia Lirio, Nicolás Pérez de Olaguer, Heiko Ramm, Manish Sahu, Alexander Tack, Stefan Zachow, Tao Jiang, Xinjun Ma, Christoph Angerman, Xin Wang, Kevin Brown, Alexandre Kirszenberg, Élodie Puybareau, Di Chen, Yiwei Bai, Brandon H. Rapazzo, Timyoas Yeah, Amber Zhang, Shangliang Xu, Feng Hou, Zhiqiang He, Chan Zeng, Zheng Xiangshang, Xu Liming, Tucker J. Netherton, Raymond P. Mumme, Laurence E. Court, Zixun Huang, Chenhang He, Li-Wen Wang, Sai Ho Ling, Lê Duy Huynh, Nicolas Boutry, Roman Jakubicek, Jiri Chmelik, Supriti Mulay, Mohanasankar Sivaprakasam, Johannes C. Paetzold, Suprosanna Shit, Ivan Ezhov, Benedikt Wiestler, Ben Glocker, Alexander Valentinitsch, Markus Rempfler, Björn H. Menze, Jan S. Kirschke BibTeX
DOI
Ambellan, Felix
2020
VerSe: A Vertebrae Labelling and Segmentation Benchmark for Multi-detector CT Images arXiv, 2020 Anjany Sekuboyina, Amirhossein Bayat, Malek E. Husseini, Maximilian Löffler, Hongwei Li, Giles Tetteh, Jan Kukačka, Christian Payer, Darko Štern, Martin Urschler, Maodong Chen, Dalong Cheng, Nikolas Lessmann, Yujin Hu, Tianfu Wang, Dong Yang, Daguang Xu, Felix Ambellan, Tamaz Amiranashvili, Moritz Ehlke, Hans Lamecker, Sebastian Lehnert, Marilia Lirio, Nicolás Pérez de Olaguer, Heiko Ramm, Manish Sahu, Alexander Tack, Stefan Zachow, Tao Jiang, Xinjun Ma, Christoph Angerman, Xin Wang, Qingyue Wei, Kevin Brown, Matthias Wolf, Alexandre Kirszenberg, Élodie Puybareau, Alexander Valentinitsch, Markus Rempfler, Björn H. Menze, Jan S. Kirschke PDF
BibTeX
arXiv
Ambellan, Felix
2019
A Surface-Theoretic Approach for Statistical Shape Modeling Proc. Medical Image Computing and Computer Assisted Intervention (MICCAI), Part IV, pp. 21-29, Vol.11767, Lecture Notes in Computer Science, 2019 (preprint available as ZIB-Report 19-20) Felix Ambellan, Stefan Zachow, Christoph von Tycowicz PDF (ZIB-Report)
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DOI
Ambellan, Felix
An as-invariant-as-possible GL+(3)-based Statistical Shape Model Proc. 7th MICCAI workshop on Mathematical Foundations of Computational Anatomy (MFCA), pp. 219-228, Vol.11846, Lecture Notes in Computer Science, 2019 (preprint available as ZIB-Report 19-46) Felix Ambellan, Stefan Zachow, Christoph von Tycowicz PDF (ZIB-Report)
BibTeX
DOI
Ambellan, Felix
Automated Hip Knee Ankle Angle Determination using Convolutional Neural Networks Master's thesis, Otto-von-Guericke-Universität Magdeburg, Felix Ambellan, Alexander Tack, Stefan Zachow (Advisors), 2019 Henok Hagos Gidey PDF
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URN
Ambellan, Felix
Automated Segmentation of Knee Bone and Cartilage combining Statistical Shape Knowledge and Convolutional Neural Networks: Data from the Osteoarthritis Initiative Medical Image Analysis, 52(2), pp. 109-118, 2019 (preprint available as ZIB-Report 19-06) Felix Ambellan, Alexander Tack, Moritz Ehlke, Stefan Zachow PDF (ZIB-Report)
BibTeX
DOI
Ambellan, Felix
Automated Segmentation of Knee Bone and Cartilage combining Statistical Shape Knowledge and Convolutional Neural Networks: Data from the Osteoarthritis Initiative (Supplementary Material) Medical Image Analysis, 52(2), pp. 109-118, 2019 (OAI-ZIB dataset) Felix Ambellan, Alexander Tack, Moritz Ehlke, Stefan Zachow BibTeX
DOI
Ambellan, Felix
Comparison of 2D and 3D CNNs for Classification of Knee MRI Bachelor's thesis, Freie Universität Berlin, Alexander Tack, Felix Ambellan (Advisors), 2019 Mona Prendke PDF
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URN
Ambellan, Felix
Statistical Shape Models - Understanding and Mastering Variation in Anatomy Biomedical Visualisation, Paul M. Rea (Ed.), Springer Nature Switzerland AG, 1, pp. 67-84, 2019, ISBN: 978-3-030-19384-3, ISBN: 978-3-030-19385-0 (preprint available as ZIB-Report 19-13) Felix Ambellan, Hans Lamecker, Christoph von Tycowicz, Stefan Zachow PDF (ZIB-Report)
BibTeX
DOI
Ambellan, Felix
2018
An Efficient Riemannian Statistical Shape Model using Differential Coordinates Medical Image Analysis, 43(1), pp. 1-9, 2018 (preprint available as ZIB-Report 16-69) Christoph von Tycowicz, Felix Ambellan, Anirban Mukhopadhyay, Stefan Zachow PDF (ZIB-Report)
BibTeX
DOI
Ambellan, Felix
Automated Segmentation of Knee Bone and Cartilage combining Statistical Shape Knowledge and Convolutional Neural Networks: Data from the Osteoarthritis Initiative Medical Imaging with Deep Learning, 2018 Felix Ambellan, Alexander Tack, Moritz Ehlke, Stefan Zachow PDF
BibTeX
Ambellan, Felix
2017
Computerassistierte Auswahl und Platzierung von interpositionalen Spacern zur Behandlung früher Gonarthrose Proceedings of the Jahrestagung der Deutschen Gesellschaft für Computer- und Roboterassistierte Chirurgie (CURAC), pp. 106-111, Vol.16, 2017 (preprint available as ZIB-Report 17-72) Robert Joachimsky, Felix Ambellan, Stefan Zachow PDF (ZIB-Report)
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URN
Ambellan, Felix
Evaluating two methods for Geometry Reconstruction from Sparse Surgical Navigation Data Proceedings of the Jahrestagung der Deutschen Gesellschaft für Computer- und Roboterassistierte Chirurgie (CURAC), pp. 24-30, Vol.16, 2017 (preprint available as ZIB-Report 17-71) Felix Ambellan, Alexander Tack, Dave Wilson, Carolyn Anglin, Hans Lamecker, Stefan Zachow PDF (ZIB-Report)
BibTeX
URN
Ambellan, Felix
Validation of three-dimensional models of the distal femur created from surgical navigation point cloud data for intraoperative and postoperative analysis of total knee arthroplasty International Journal of Computer Assisted Radiology and Surgery, 12(12), pp. 2097-2105, 2017 David Wilson, Carolyn Anglin, Felix Ambellan, Carl Martin Grewe, Alexander Tack, Hans Lamecker, Michael Dunbar, Stefan Zachow PDF
BibTeX
DOI
Ambellan, Felix