TY - CHAP A1 - Zachow, Stefan A1 - Kubiack, Kim A1 - Malinowski, Jana A1 - Lamecker, Hans A1 - Essig, Harald A1 - Gellrich, Nils-Claudius T1 - Modellgestützte chirurgische Rekonstruktion komplexer Mittelgesichtsfrakturen T2 - Proc. BMT, Biomed Tech 2010 Y1 - 2010 VL - 55 (Suppl 1) SP - 107 EP - 108 PB - Walter de Gruyter-Verlag ER - TY - GEN A1 - Bindernagel, Matthias A1 - Kainmüller, Dagmar A1 - Ramm, Heiko A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Analysis of inter-individual anatomical shape variations of joint structures T2 - Proc. Int. Society of Computer Assisted Orthopaedic Surgery (CAOS) Y1 - 2012 IS - 210 ER - TY - CHAP A1 - Nguyen, The Duy A1 - Lamecker, Hans A1 - Kainmüller, Dagmar A1 - Zachow, Stefan ED - Ayache, Nicholas ED - Delingette, Hervé ED - Golland, Polina ED - Mori, Kensaku T1 - Automatic Detection and Classification of Teeth in CT Data T2 - Proc. Medical Image Computing and Computer Assisted Intervention (MICCAI) Y1 - 2012 VL - 7510 SP - 609 EP - 616 ER - TY - JOUR A1 - Nguyen, The Duy A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Automatic bone and tooth detection for CT-based dental implant planning JF - Int. J. Computer Assisted Radiology and Surgery Y1 - 2012 VL - 7, Supplement 1 IS - 1 SP - 293 EP - 294 PB - Springer ER - TY - GEN A1 - Ehlke, Moritz A1 - Ramm, Heiko A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Efficient projection and deformation of volumetric shape and intensity models for accurate simulation of X-ray images T2 - Eurographics Workshop on Visual Computing for Biomedicine (NVIDIA best poster award) Y1 - 2012 ER - TY - CHAP A1 - Kahnt, Max A1 - Ramm, Heiko A1 - Lamecker, Hans A1 - Zachow, Stefan ED - Levine, Joshua A. ED - Paulsen, Rasmus R. ED - Zhang, Yongjie T1 - Feature-Preserving, Multi-Material Mesh Generation using Hierarchical Oracles T2 - Proc. MICCAI Workshop on Mesh Processing in Medical Image Analysis (MeshMed) Y1 - 2012 VL - 7599 SP - 101 EP - 111 ER - TY - GEN A1 - Lange, Thomas A1 - Lamecker, Hans A1 - Hünerbein, Michael A1 - Eulenstein, Sebastian A1 - Beller, Sigfried A1 - Schlag, Peter T1 - Validation Metrics for Non-Rigid Registration of Medical Images containing Vessel Trees Y1 - 2008 U6 - https://doi.org/10.1007/978-3-540-78640-5_17 SP - 82 EP - 86 PB - Springer ER - TY - CHAP A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Seim, Heiko A1 - Zinser, Max A1 - Zachow, Stefan ED - Yang, Guang-Zhong ED - J. Hawkes, David ED - Rueckert, Daniel ED - Noble, J. Alison ED - J. Taylor, Chris T1 - Automatic Extraction of Mandibular Nerve and Bone from Cone-Beam CT Data T2 - Proceedings of Medical Image Computing and Computer Assisted Intervention (MICCAI) Y1 - 2009 SP - 76 EP - 83 CY - London, UK ER - TY - CHAP A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Hege, Hans-Christian T1 - An Articulated Statistical Shape Model for Accurate Hip Joint Segmentation T2 - EBMC 2009. Int. Conf. of the IEEE Eng. in Med. and Biol. Society (EMBC) Y1 - 2009 SP - 6345 EP - 6351 CY - Minneapolis, USA ER - TY - JOUR A1 - Zachow, Stefan A1 - Lamecker, Hans A1 - Zöckler, Maja A1 - Haberl, Ernst T1 - Computergestützte Planung zur chirurgischen Korrektur von frühkindlichen Schädelfehlbildungen (Craniosynostosen) JF - Face 02/09, Int. Mag. of Orofacial Esthetics, Oemus Journale Leipzig Y1 - 2009 SP - 48 EP - 53 ER - TY - CHAP A1 - Heimann, Tobias A1 - Chung, François A1 - Lamecker, Hans A1 - Delingette, Hervé T1 - Subject-Specific Ligament Models: Towards Real-Time Simulation of the Knee Joint T2 - Proc. Computational Biomechanics for Medicine IV Workshop Y1 - 2009 U6 - https://doi.org/10.1007/978-1-4419-5874-7 SP - 107 EP - 119 PB - Springer New York ER - TY - JOUR A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Multi-object Segmentation with Coupled Deformable Models JF - Annals of the British Machine Vision Association (BMVA) Y1 - 2009 VL - 5 SP - 1 EP - 10 ER - TY - CHAP A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Hege, Hans-Christian T1 - Coupling Deformable Models for Multi-object Segmentation T2 - Proc. Int. Symp. on Computational Models for Biomedical Simulation (ISBMS) Y1 - 2008 U6 - https://doi.org/10.1007/978-3-540-70521-5_8 SP - 69 EP - 78 ER - TY - CHAP A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Heller, Markus O. A1 - Hege, Hans-Christian T1 - Multi-Object Segmentation with Coupled Deformable Models T2 - Proc. Medical Image Understanding and Analysis Y1 - 2008 SP - 34 EP - 38 ER - TY - CHAP A1 - Seim, Heiko A1 - Kainmüller, Dagmar A1 - Kuss, Anja A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Menzel, Randolf A1 - Rybak, Juergen T1 - Model-based autosegmentation of the central brain of the honeybee, Apis mellifera, using active statistical shape models T2 - Proc. 1st INCF Congress of Neuroinformatics: Databasing and Modeling the Brain Y1 - 2008 U6 - https://doi.org/10.3389/conf.neuro.11.2008.01.064 ER - TY - CHAP A1 - Dworzak, Jalda A1 - Lamecker, Hans A1 - von Berg, Jens A1 - Klinder, Tobias A1 - Lorenz, Cristian A1 - Kainmüller, Dagmar A1 - Seim, Heiko A1 - Hege, Hans-Christian A1 - Zachow, Stefan T1 - Towards model-based 3-D reconstruction of the human rib cage from radiographs T2 - Proc. 7. Jahrestagung der Deutschen Gesellschaft für Computer-Roboterassistierte Chirurgie (CURAC) Y1 - 2008 SP - 193 EP - 196 ER - TY - CHAP A1 - Seim, Heiko A1 - Kainmüller, Dagmar A1 - Heller, Markus O. A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Hege, Hans-Christian T1 - Automatic Segmentation of the Pelvic Bones from CT Data Based on a Statistical Shape Model T2 - Eurographics Workshop on Visual Computing for Biomedicine (VCBM) Y1 - 2008 SP - 93 EP - 100 CY - Delft, Netherlands ER - TY - CHAP A1 - Papazov, Chavdar A1 - Dercksen, Vincent J. A1 - Lamecker, Hans A1 - Hege, Hans-Christian T1 - Visualizing morphogenesis and growth by temporal interpolation of surface-based 3D atlases T2 - Proceedings of the 2008 IEEE International Symposium on Biomedical Imaging Y1 - 2008 U6 - https://doi.org/10.1109/ISBI.2008.4541123 SP - 824 EP - 827 ER - TY - JOUR A1 - Sahner, Jan A1 - Weber, Britta A1 - Lamecker, Hans A1 - Prohaska, Steffen T1 - Extraction of feature Lines on surface meshes based on discrete Morse theory JF - Computer Graphics Forum Y1 - 2008 U6 - https://doi.org/10.1111/j.1467-8659.2008.01202.x VL - 27 IS - 3 SP - 735 EP - 742 CY - Eindhoven, Netherlands ER - TY - CHAP A1 - Zilske, Michael A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Adaptive Remeshing of Non-Manifold Surfaces T2 - Eurographics 2008 Annex to the Conf. Proc. Y1 - 2008 SP - 207 EP - 211 ER - TY - CHAP A1 - Seim, Heiko A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Segmentation of Bony Structures with Ligament Attachment Sites T2 - Bildverarbeitung für die Medizin 2008 Y1 - 2008 U6 - https://doi.org/10.1007/978-3-540-78640-5_42 SP - 207 EP - 211 PB - Springer ER - TY - JOUR A1 - Lamecker, Hans A1 - Kamer, Lukas A1 - Wittmers, Antonia A1 - Zachow, Stefan A1 - Kaup, Thomas A1 - Schramm, Alexander A1 - Noser, Hansrudi A1 - Hammer, Beat T1 - A method for the three-dimensional statistical shape analysis of the bony orbit JF - Proc. Computer Aided Surgery around the Head Y1 - 2007 SP - 94 EP - 97 ER - TY - CHAP A1 - Lange, Thomas A1 - Lamecker, Hans A1 - Hünerbein, Michael A1 - Eulenstein, Sebastian A1 - Beller, Sigfried A1 - Schlag, Peter ED - Horsch, A. T1 - A new class of distance measures for registration of tubular models to image data T2 - Proc. Bildverarbeitung für die Medizin (BVM) Y1 - 2007 U6 - https://doi.org/10.1007/978-3-540-71091-2_21 SP - 101 EP - 105 PB - Springer ER - TY - JOUR A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Seim, Heiko A1 - Zachow, Stefan T1 - Multi-object segmentation of head bones JF - MIDAS Journal Y1 - 2009 ER - TY - CHAP A1 - Seim, Heiko A1 - Kainmüller, Dagmar A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - A System for Unsupervised Extraction of Orthopaedic Parameters from CT Data T2 - GI Workshop Softwareassistenten - Computerunterstützung für die medizinische Diagnose und Therapieplanung Y1 - 2009 SP - 1328 EP - 1337 CY - Lübeck, Germany ER - TY - CHAP A1 - Lamecker, Hans A1 - Mansi, Tomaso A1 - Relan, Jatin A1 - Billet, Florence A1 - Sermesant, Maxime A1 - Ayache, Nicholas A1 - Delingette, Hervé T1 - Adaptive Tetrahedral Meshing for Personalized Cardiac Simulations T2 - Proc. MICCAI Workshop on Cardiovascular Interventional Imaging and Biophysical Modelling (CI2BM) Y1 - 2009 SP - 149 EP - 158 ER - TY - JOUR A1 - Lange, Thomas A1 - Hünerbein, Michael A1 - Eulenstein, Sebastian A1 - Beller, Sigfried A1 - Schlag, Peter A1 - Lamecker, Hans T1 - A Distance Measure for Non-Rigid Registration of Geometrical Models to Intensity Data JF - Int. J. Computer Assisted Radiology and Surgery Y1 - 2007 VL - 2, Suppl. 1 SP - 204 EP - 206 PB - Springer ER - TY - CHAP A1 - Neubert, Kerstin A1 - Lamecker, Hans A1 - Hege, Hans-Christian A1 - Menzel, Randolf A1 - Rybak, Jürgen T1 - Model-based autosegmentation of brain structures in the honeybee using statistical shape models T2 - Proc. 8th Int. Congr. of Neuroethology (ICN) Y1 - 2007 ER - TY - JOUR A1 - Kainmüller, Dagmar A1 - Lange, Thomas A1 - Lamecker, Hans T1 - Shape constrained automatic segmentation of the liver based on a heuristic intensity model JF - Proc. MICCAI Workshop 3D Segmentation in the Clinic Y1 - 2007 SP - 109 EP - 116 ER - TY - CHAP A1 - Lange, Thomas A1 - Wenckebach, Thomas A1 - Lamecker, Hans A1 - Seebaß, Martin A1 - Hünerbein, Michael A1 - Eulenstein, Sebastian A1 - Schlag, Peter-Michael T1 - Registration of different phases of contrast-enhanced CT/MRI data for computer-assisted liver surgery planning T2 - Int. J. Medical Robotics and Computer Assisted Surgery Y1 - 2005 U6 - https://doi.org/10.1002/rcs.23 VL - 1 (3) SP - 6 EP - 20 PB - Wiley ER - TY - GEN A1 - Kamer, Lukas A1 - Noser, Hansrudi A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Wittmers, Antonia A1 - Kaup, Thomas A1 - Schramm, Alexander A1 - Hammer, Beat T1 - Three-dimensional statistical shape analysis - A useful tool for developing a new type of orbital implant? Y1 - 2006 SP - 20 EP - 21 PB - AO Development Institute, New Products Brochure 2/06 ER - TY - JOUR A1 - Haberl, Hannes A1 - Hell, Bertold A1 - Zöckler, Maja A1 - Zachow, Stefan A1 - Lamecker, Hans A1 - Sarrafzadeh, Asita A1 - Riecke, B. A1 - Langsch, Wolfgang A1 - Deuflhard, Peter A1 - Bier, Jürgen A1 - Brock, Mario T1 - Technical aspects and results of surgery for craniosynostosis JF - Zentralblatt für Neurochirurgie Y1 - 2004 VL - 65 IS - 2 SP - 65 EP - 74 ER - TY - CHAP A1 - Lange, Thomas A1 - Wenckebach, Thomas A1 - Seebaß, Martin A1 - Lamecker, Hans A1 - Hünerbein, Michael T1 - Registration of different phases of contrast-enhanced MR data for liver surgery T2 - 3. Jahrestagung der Deutschen Gesellschaft für Computer-Roboterassistierte Chirurgie CURAC Y1 - 2004 ER - TY - CHAP A1 - Lange, Thomas A1 - Eulenstein, Sebastian A1 - Hünerbein, Michael A1 - Lamecker, Hans A1 - Schlag, Peter-Michael ED - Barrilot, Christian T1 - Augmenting intraoperative 3D ultrasound with preoperative models for navigation in liver surgery T2 - Proceedings MICCAI Y1 - 2004 SP - 543 EP - 541 PB - Springer ER - TY - CHAP A1 - Wenckebach, Thomas A1 - Lamecker, Hans A1 - Hege, Hans-Christian ED - Christensen, Gary ED - Sonka, Milan T1 - Capturing anatomical shape variability using B-spline registration T2 - Information Processing in Medical Imaging: 19th International Conference (IPMI 2005) Y1 - 2005 U6 - https://doi.org/10.1007/b137723 VL - 3565/2005 SP - 578 EP - 590 PB - Springer-Verlag GmbH CY - Glenwood Springs, CO, USA ER - TY - CHAP A1 - Lamecker, Hans A1 - Zöckler, Maja A1 - Haberl, Hannes A1 - Zachow, Stefan A1 - Hege, Hans-Christian T1 - Statistical shape modeling for craniosynostosis planning T2 - 2nd International Conference Advanced Digital Technology in Head and Neck Reconstruction 2005, Abstract Volume Y1 - 2005 SP - 64 CY - Banff, Alberta ER - TY - CHAP A1 - Lamecker, Hans A1 - Wenckebach, Thomas A1 - Hege, Hans-Christian T1 - Atlas-based 3D-shape reconstruction from x-ray images T2 - Proc. Int. Conf. of Pattern Recognition (ICPR2006) Y1 - 2006 U6 - https://doi.org/10.1109/ICPR.2006.279 VL - Volume I SP - 371 EP - 374 PB - IEEE Computer Society ER - TY - CHAP A1 - Lamecker, Hans A1 - Wenckebach, Thomas A1 - Hege, Hans-Christian A1 - N. Duda, Georg A1 - Heller, Markus T1 - Atlas-basierte 3D-Rekonstruktion des Beckens aus 2D-Projektionsbildern T2 - Bildverarbeitung für die Medizin 2006: Algorithmen - Systeme - Anwendungen Y1 - 2006 U6 - https://doi.org/10.1007/3-540-32137-3_6 SP - 26 EP - 30 PB - Springer Berlin Heidelberg ER - TY - JOUR A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Haberl, Hannes A1 - Stiller, Michael T1 - Medical applications for statistical shape models JF - Computer Aided Surgery around the Head, Fortschritt-Berichte VDI - Biotechnik/Medizintechnik Y1 - 2005 VL - 17 (258) SP - 61 ER - TY - CHAP A1 - Zachow, Stefan A1 - Lamecker, Hans A1 - Elsholtz, Barbara A1 - Stiller, Michael T1 - Reconstruction of mandibular dysplasia using a statistical 3D shape model T2 - Proc. Computer Assisted Radiology and Surgery (CARS) Y1 - 2005 U6 - https://doi.org/10.1016/j.ics.2005.03.339 SP - 1238 EP - 1243 CY - Berlin, Germany ER - TY - JOUR A1 - Todt, Ingo A1 - Lamecker, Hans A1 - Ramm, Heiko A1 - Frenzel, Henning A1 - Wollenberg, Barbara A1 - Beleites, Thomas A1 - Zahnert, Thomas A1 - Thomas, Jan Peter A1 - Dazert, Stefan A1 - Ernst, Arneborg T1 - Entwicklung eines CT-Daten-basierten Vibrant-Bonebridge-Viewers JF - HNO N2 - Die Positionierung des B-FMT der Vibrant Bonebridge kann aufgrund der anatomischen Verhältnisse des Mastoids und der Größe des Aktuators ohne eine vorherige Beurteilung der individuellen Computertomographie (CT) des Felsenbeins problematisch sein. Die Entwicklung eines einfach zu bedienenden Viewers, welcher eine Positionierung des B-FMT im Felsenbeinmodell ermöglicht und hier auf individuelle potenzielle anatomische Konflikte hinweist sowie Lösungsmöglichkeiten anbietet, kann ein hilfreiches Werkzeug zur präoperativen Positionierung sein. Ziel der Arbeit war die Definition von Anforderungen und die Anfertigung eines Prototyps eines Vibrant-Bonebridge-Viewers. Auf der Basis einer ZIBAmira-Software-Version und der Inklusion eines B-FMT-Modells unter Erstellung eines Felsenbeinmodells, welches die intuitive Beurteilung von Konflikten ermöglicht, erfolgte die Erstellung des Prototyps eines Vibrant-Bonebridge-Viewers.Ergebnisse. Die Segmentierungszeit der individuellen DICOM-Daten („digital imaging and communications in medicine“) beträgt etwa 5 min. Eine Positionierung im individuellen 3-D-Felsenbeinmodell ermöglicht die quantitative und qualitative Beurteilung von Konflikten (Sinus sigmoideus, mittlere Schädelgrube) und das Aufsuchen einer bevorzugten Position. Das Anheben des B-FMT mittels virtueller Unterlegscheiben kann simuliert werden. Der erstellte Vibrant-Bonebridge-Viewer ermöglicht verlässlich eine Simulation der B-FMT-Positionierung. Die klinische Anwendbarkeit muss evaluiert werden. Y1 - 2014 U6 - https://doi.org/10.1007/s00106-014-2851-3 VL - 62 SP - 439 EP - 442 PB - Springer ER - TY - JOUR A1 - Todt, Ingo A1 - Lamecker, Hans A1 - Ramm, Heiko A1 - Ernst, Arneborg T1 - A computed tomographic data-based vibrant bonebridge visualization tool JF - Cochlear Implants International N2 - Information about the temporal bone size and variations of anatomical structures are crucial for a safe positioning of the Vibrant Bonebridge B-FMT. A radiological based preoperative planning of the surgical procedure decreases the surgical time and minimizes the risk of complications. We developed a software tool, which allows a catch up of foreign DICOM data based CT temporal bone scans. The individual CT scan is transmitted into a 3D reconstructed pattern of the temporal bone. In this 3D reconstruction the individually favored position of the B- FMT should be found. The software allows a determination of a safe B-FMT position by identifying the individual relation of middle fossa, jugular bulb and external auditory canal. Skull thickness and screw length are contained parameters for the surgical planning. An easy to handle software tool allows a radiologically data based safe and fast surgical positioning of the B-FMT. Y1 - 2014 U6 - https://doi.org/10.1179/1467010014Z.000000000155 VL - 15 IS - S1 SP - 72 EP - 74 ER - TY - JOUR A1 - Hochfeld, Mascha A1 - Lamecker, Hans A1 - Thomale, Ulrich W. A1 - Schulz, Matthias A1 - Zachow, Stefan A1 - Haberl, Hannes T1 - Frame-based cranial reconstruction JF - Journal of Neurosurgery: Pediatrics N2 - The authors report on the first experiences with the prototype of a surgical tool for cranial remodeling. The device enables the surgeon to transfer statistical information, represented in a model, into the disfigured bone. The model is derived from a currently evolving databank of normal head shapes. Ultimately, the databank will provide a set of standard models covering the statistical range of normal head shapes, thus providing the required template for any standard remodeling procedure as well as customized models for intended overcorrection. To date, this technique has been used in the surgical treatment of 14 infants (age range 6-12 months) with craniosynostosis. In all 14 cases, the designated esthetic result, embodied by the selected model, has been achieved, without morbidity or mortality. Frame-based reconstruction provides the required tools to precisely realize the surgical reproduction of the model shape. It enables the establishment of a self-referring system, feeding back postoperative growth patterns, recorded by 3D follow-up, into the model design. Y1 - 2014 U6 - https://doi.org/10.3171/2013.11.PEDS1369 VL - 13 IS - 3 SP - 319 EP - 323 ER - TY - CHAP A1 - Mukhopadhyay, Anirban A1 - Morillo, Oscar A1 - Zachow, Stefan A1 - Lamecker, Hans T1 - Robust and Accurate Appearance Models Based on Joint Dictionary Learning Data from the Osteoarthritis Initiative T2 - Lecture Notes in Computer Science, Patch-Based Techniques in Medical Imaging. Patch-MI 2016 N2 - Deformable model-based approaches to 3D image segmentation have been shown to be highly successful. Such methodology requires an appearance model that drives the deformation of a geometric model to the image data. Appearance models are usually either created heuristically or through supervised learning. Heuristic methods have been shown to work effectively in many applications but are hard to transfer from one application (imaging modality/anatomical structure) to another. On the contrary, supervised learning approaches can learn patterns from a collection of annotated training data. In this work, we show that the supervised joint dictionary learning technique is capable of overcoming the traditional drawbacks of the heuristic approaches. Our evaluation based on two different applications (liver/CT and knee/MR) reveals that our approach generates appearance models, which can be used effectively and efficiently in a deformable model-based segmentation framework. Y1 - 2016 U6 - https://doi.org/10.1007/978-3-319-47118-1_4 VL - 9993 SP - 25 EP - 33 ER - TY - JOUR A1 - Wilson, David A1 - Anglin, Carolyn A1 - Ambellan, Felix A1 - Grewe, Carl Martin A1 - Tack, Alexander A1 - Lamecker, Hans A1 - Dunbar, Michael A1 - Zachow, Stefan T1 - 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 JF - International Journal of Computer Assisted Radiology and Surgery N2 - Purpose: Despite the success of total knee arthroplasty there continues to be a significant proportion of patients who are dissatisfied. One explanation may be a shape mismatch between pre and post-operative distal femurs. The purpose of this study was to investigate a method to match a statistical shape model (SSM) to intra-operatively acquired point cloud data from a surgical navigation system, and to validate it against the pre-operative magnetic resonance imaging (MRI) data from the same patients. Methods: A total of 10 patients who underwent navigated total knee arthroplasty also had an MRI scan less than 2 months pre-operatively. The standard surgical protocol was followed which included partial digitization of the distal femur. Two different methods were employed to fit the SSM to the digitized point cloud data, based on (1) Iterative Closest Points (ICP) and (2) Gaussian Mixture Models (GMM). The available MRI data were manually segmented and the reconstructed three-dimensional surfaces used as ground truth against which the statistical shape model fit was compared. Results: For both approaches, the difference between the statistical shape model-generated femur and the surface generated from MRI segmentation averaged less than 1.7 mm, with maximum errors occurring in less clinically important areas. Conclusion: The results demonstrated good correspondence with the distal femoral morphology even in cases of sparse data sets. Application of this technique will allow for measurement of mismatch between pre and post-operative femurs retrospectively on any case done using the surgical navigation system and could be integrated into the surgical navigation unit to provide real-time feedback. Y1 - 2017 UR - https://link.springer.com/content/pdf/10.1007%2Fs11548-017-1630-5.pdf U6 - https://doi.org/10.1007/s11548-017-1630-5 VL - 12 IS - 12 SP - 2097 EP - 2105 PB - Springer ER - TY - CHAP A1 - Baum, Daniel A1 - Mahlow, Kristin A1 - Lamecker, Hans A1 - Zachow, Stefan A1 - Müller, Johannes A1 - Hege, Hans-Christian T1 - The Potential of Surface-based Geometric Morphometrics for Evolutionary Studies: An Example using Dwarf Snakes (Eirenis) T2 - Abstract in DigitalSpecimen 2014 N2 - Geometric morphometrics plays an important role in evolutionary studies. The state-of-the-art in this field are landmark-based methods. Since the landmarks usually need to be placed manually, only a limited number of landmarks are generally used to represent the shape of an anatomical structure. As a result, shape characteristics that cannot be properly represented by small sets of landmarks are disregarded. In this study, we present a method that is free of this limitation. The method takes into account the whole shape of an anatomical structure, which is represented as a surface, hence the term ‘surface-based morphometrics’. Correspondence between two surfaces is established by defining a partitioning of the surfaces into homologous surface patches. The first step for the generation of a surface partitioning is to place landmarks on the surface. Subsequently, the landmarks are connected by curves lying on the surface. The curves, called ‘surface paths’, might either follow specific anatomical features or they can be geodesics, that is, shortest paths on the surface. One important requirement, however, is that the resulting surface path networks are topologically equivalent across all surfaces. Once the surface path networks have been defined, the surfaces are decomposed into patches according to the path networks. This approach has several advantages. One of them is that we can discretize the surface by as many points as desired. Thus, even fine shape details can be resolved if this is of interest for the study. Since a point discretization is used, another advantage is that well-established analysis methods for landmark-based morphometrics can be utilized. Finally, the shapes can be easily morphed into one another, thereby greatly supporting the understanding of shape changes across all considered specimens. To show the potential of the described method for evolutionary studies of biological specimens, we applied the method to the para-basisphenoid complex of the snake genus Eirenis. By using this anatomical structure as example, we present all the steps that are necessary for surface-based morphometrics, including the segmentation of the para-basisphenoid complex from micro-CT data sets. We also show some first results using statistical analysis as well as classification methods based on the presented technique. Y1 - 2014 ER - TY - GEN A1 - Lamecker, Hans A1 - Hege, Hans-Christian A1 - Tabelow, Karsten A1 - Polzehl, Jörg ED - Deuflhard, Peter ED - et al., T1 - Image Processing T2 - MATHEON - Mathematics for Key Technologies Y1 - 2014 U6 - https://doi.org/10.4171/137 SP - 359 EP - 376 PB - European Mathematical Society ER - TY - GEN A1 - Ehlke, Moritz A1 - Frenzel, Thomas A1 - Ramm, Heiko A1 - Lamecker, Hans A1 - Akbari Shandiz, Mohsen A1 - Anglin, Carolyn A1 - Zachow, Stefan T1 - Robust Measurement of Natural Acetabular Orientation from AP Radiographs using Articulated 3D Shape and Intensity Models T3 - ZIB-Report - 14-12 KW - articulated shape and intensity models KW - 3D reconstruction KW - acetabular orientation KW - image registration Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-49824 SN - 1438-0064 ER - TY - CHAP A1 - Lamecker, Hans A1 - Zachow, Stefan T1 - Statistical Shape Modeling of Musculoskeletal Structures and Its Applications T2 - Computational Radiology for Orthopaedic Interventions N2 - Statistical shape models (SSM) describe the shape variability contained in a given population. They are able to describe large populations of complex shapes with few degrees of freedom. This makes them a useful tool for a variety of tasks that arise in computer-aided madicine. In this chapter we are going to explain the basic methodology of SSMs and present a variety of examples, where SSMs have been successfully applied. Y1 - 2016 SN - 978-3-319-23481-6 U6 - https://doi.org/10.1007/978-3-319-23482-3 VL - 23 SP - 1 EP - 23 PB - Springer ER - TY - JOUR A1 - Günther, Andreas A1 - Lamecker, Hans A1 - Weiser, Martin T1 - Flexible Shape Matching with Finite Element Based LDDMM JF - International Journal of Computer Vision N2 - We consider Large Deformation Diffeomorphic Metric Mapping of general $m$-currents. After stating an optimization algorithm in the function space of admissable morph generating velocity fields, two innovative aspects in this framework are presented and numerically investigated: First, we spatially discretize the velocity field with conforming adaptive finite elements and discuss advantages of this new approach. Second, we directly compute the temporal evolution of discrete $m$-current attributes. Y1 - 2013 U6 - https://doi.org/10.1007/s11263-012-0599-3 VL - 105 IS - 2 SP - 128 EP - 143 ER -