Caecilia Charbonnier

Caecilia Charbonnier
Artanim · R&D

PhD PD

About

103
Publications
222,009
Reads
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967
Citations
Introduction
Caecilia first obtained a MAS degree in 2006 in Computer Graphics at EPFL and a PhD degree in Computer Science in 2010 at MIRALab - University of Geneva. She is the Co-Founder and Research Director of Artanim, a center specialized in motion capture technologies. She is also Senior Lecturer at the Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, and Professor of Practice at the School of Arts, Media and Engineering, Arizona State University.
Additional affiliations
March 2018 - present
University of Geneva
Position
  • Privat-Docent
Description
  • Privat-Docent at the Department of Radiology and Medical Informatics, University of Geneva.
April 2011 - present
Artanim
Artanim
Position
  • Research Director
Description
  • Co-founder, president and research director at Artanim, a foundation dedicated to the development and promotion of motion capture.
September 2004 - February 2010
University of Geneva
Position
  • Research Assistant
Description
  • Medical research and simulation, including the following topics: optical motion capture and motion analysis, 3D body scanning, biomechanics, ontology, image processing, segmentation, surface deformation and registration.
Education
January 2007 - February 2010
University of Geneva
Field of study
  • Computer Science
October 2005 - December 2006
École Polytechnique Fédérale de Lausanne
Field of study
  • Computer Graphics
October 2001 - September 2005
University of Geneva
Field of study
  • Information technology with minor in International Relations (HEI)

Publications

Publications (103)
Article
Full-text available
Impingement after reverse shoulder arthroplasty (RSA) is believed to occur from repetitive contact in adduction between the humeral component and the inferior scapular pillar. The primary purpose of this biomechanical study was to confirm the presence of different types of impingement and to examine which daily-life movements are responsible for th...
Article
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Purpose: Rotator cuff and labral lesions in tennis players could be related to posterosuperior internal impingement or subacromial impingement during tennis serve. However, it is unknown which of these impingements are responsible for the lesions found in the tennis player's shoulder. Moreover, there is a lack of validated noninvasive methods and...
Article
Full-text available
Relative risk of impingement and joint instability during sexual activities after total hip arthroplasty (THA) has never been objectively investigated. Hip range of motion necessary to perform sexual positions is unknown. A motion capture study with two volunteers was performed. 12 common sexual positions were captured and relevant hip joint kinema...
Article
Full-text available
Early hip osteoarthritis in dancers could be explained by femoroacetabular impingements. However, there is a lack of validated noninvasive methods and dynamic studies to ascertain impingement during motion. Moreover, it is unknown whether the femoral head and acetabulum are congruent in typical dancing positions. The practice of some dancing moveme...
Article
Full-text available
Purpose High-intensity focused ultrasound (HIFU) is challenging in the liver due to the respiratory motion and risks of near-/far-field burns, particularly on the ribs. We implemented a novel design of a HIFU phased-array transducer, dedicated to transcostal hepatic thermo-ablation. Due to its large acoustic window and strong focusing, the transduc...
Article
Full-text available
We present two experiments to assess the relative impact of different levels of body animation fidelity on plausibility illusion (Psi). The first experiment presents a virtual character that is not controlled by the user ( $n = 13$ ) while the second experiment presents a user-controlled virtual avatar ( $n = 24$ , all male). Psi concerns how rea...
Article
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In this paper, we investigate three forms of virtual reality (VR) content production and consumption. Namely, pre-rendered 360 stereoscopic video, full real-time rendered 3D scenes, and the combination of a real-time rendered 3D environment with a pre-rendered video billboard used to present the central elements of the scene. We discuss the advanta...
Article
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Background Midshaft clavicle fracture shortening measurement is a reported key element for indication to surgical management and reporting of clinical trials. Determination of pre-fracture clavicle length for shortening measurement remains an unresolved issue. The purpose of the study was to assess accuracy of a novel technique of three-dimensional...
Article
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Background: Kinematic changes of the scapulothoracic joint may influence the relative position of the glenoid fossa and, consequently, the glenohumeral joint. As the alignment of the scapula relative to the thorax differs between individuals, such variability may be another factor in the development of posterior head subluxation. The purpose of th...
Preprint
Full-text available
We introduce HUMAN4D, a large and multimodal 4D dataset that contains a variety of human activities simultaneously captured by a professional marker-based MoCap, a volumetric capture and an audio recording system. By capturing 2 female and $2$ male professional actors performing various full-body movements and expressions, HUMAN4D provides a divers...
Article
Full-text available
Purpose To quantify shoulder motion during Codman pendulum exercises. Methods Shoulder kinematics were analyzed in 17 healthy volunteers using a validated biomechanical model coupling patient-specific imaging and motion capture. Participants were instructed to perform medio-lateral, antero-posterior and circular pendulum exercises. Glenohumeral (G...
Article
Full-text available
Introduction : Il n’existe pas de consensus sur la meilleure méthode de réaliser une acromioplastie, notamment quant à la localisation et à l’étendue de la résection osseuse, qui dépendent de la morphologie de l'articulation scapulo-humérale. Hypothèse : Notre but est de déterminer si la planification de l’acromioplastie assistée par ordinateur aid...
Article
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Introduction There is no consensus on how to perform acromioplasty, particularly regarding the level and extent of bone resection, which depend on scapular and humeral morphologies. Hypothesis We aimed to determine whether computer-assisted acromioplasty planning helps surgeons remove impinging bone, reduce unnecessary resections, and improve shor...
Article
Full-text available
Background To date, there is no consensus on when and how to perform acromioplasty during rotator cuff repair (RCR). We aimed to determine the volume of impinging bone removed during acromioplasty and whether it influences postoperative range of motion (ROM) and clinical scores after RCR. Methods Preoperative and postoperative computed tomography...
Article
Full-text available
Purpose Rehabilitation is an important aspect of both non-operative and operative treatments of knee ligament tear. Posterior cruciate ligament (PCL) non-operative treatment consists of a step-by-step rehabilitation protocol and is well described. It goes from rest (phase I) to strengthening exercises (phase IV). More specific and high-intensity ex...
Article
Full-text available
We introduce HUMAN4D, a large and multimodal 4D dataset that contains a variety of human activities simultaneously captured by a professional marker-based MoCap, a volumetric capture and an audio recording system. By capturing 2 female and 2 male professional actors performing various full-body movements and expressions, HUMAN4D provides a diverse...
Article
Full-text available
Objectives To date, no study has considered the impact of acromial morphology on shoulder range of movement (ROM). The purpose of our study was to evaluate the effects of lateralization of the centre of rotation (COR) and neck-shaft angle (NSA) on shoulder ROM after reverse shoulder arthroplasty (RSA) in patients with different scapular morphologie...
Article
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Background Augmented reality (AR) allows the surgeon to represent holographic patient‐specific anatomical information and surgical instruments on the physical world. To correctly superimpose virtual and physical objects, a hand‐eye calibration method for mapping the virtual and physical spaces was proposed. Methods Mathematical relationships betwe...
Article
Full-text available
The aim of this study was to analyze the occurrence of rotator cuff impingement due to reduction of subacromial space height during complex shoulder motion to determine safety of sexual activities. The hypothesis was that such activities could be deleterious if not performed with precaution. To use a patient-specific 3D measurement technique coupli...
Conference Paper
Full-text available
Purpose Recent technology advances in Augmented Reality (AR) is creating an opportunity for a paradigm shift in the field of Computer Assisted Surgery (CAS). Despite having the potential of being a promising technology in clinical applications, its accuracy, robustness, and performances under specific environmental conditions have not been fully i...
Conference Paper
Full-text available
We present a visualization tool for human motion analysis in augmented reality. Our tool builds upon our previous work on joint biomechanical modelling for kinematic analysis, based on optical motion capture and personalized anatomical reconstruction of joint structures from medical imaging. It provides healthcare professionals with the in situ vis...
Article
Full-text available
Shoulder apprehension is related to changes in functional cerebral networks induced by dislocations, peripheral neuromuscular lesions and persistent mechanical glenohumeral instability consisting of micro-motion. All the damage to the osseous and soft-tissue stabilizers of the shoulder, as well as neurologic impairment persisting even after stabili...
Conference Paper
Full-text available
We present a visualization tool for human motion analysis in augmented reality. Our tool builds upon our previous work on joint biomechanical modelling for kinematic analysis, based on optical motion capture and personalized anatomical reconstruction of joint structures from medical imaging. It provides healthcare professionals with the in situ vis...
Conference Paper
Full-text available
We describe a calibration procedure to track consumer Head Mounted Displays (HMD) using a 3rd party tracking solution. The calibration consists of registering the center of projection of the rendering hardware to a 3rd party tracked object attached to it, and is performed by matching motion datasets from the HMD built-in and 3rd party tracking solu...
Article
Full-text available
Purpose: We present a computer-assisted planning solution "ArthroPlanner" for acromioplasty based on 3D anatomical models, computed tomography and joint kinematic simulations. Methods: In addition to a standard static clinical evaluation (anamnesis, radiological examination), the software provides a dynamic assessment of the shoulder joint by co...
Article
Full-text available
Purpose: Shoulder strength training exercises represent a major component of rehabilitation protocols designed for conservative or postsurgical management of shoulder pathologies. Numerous methods are described for exercising each shoulder muscle or muscle group. Limited information is available to assess potential deleterious effects of individua...
Article
The methods to determine air gap thickness and contact area are limited for stationary position of the manikin. In this study, 3D garment simulation software was quantitatively validated by comparing these parameters obtained from this tool with the ones obtained from accurate 3D scanning method to assess the capability of 3D garment simulation sof...
Conference Paper
Full-text available
The primary objective of this study was to compare radiological results including persistent subacromial impingement in a serie of patients operated from a postero-superior rotator cuff repair with or without a computer-assisted planning solution, called ArthroPlanner, for acromioplasty. As individual scapular anatomy and patient's expectations are...
Article
Full-text available
Objectives The aim was to assess the diagnostic performance of magnetic resonance arthrography (MRA) of the shoulder for the detection of "Fosbury flop" tears. Methods All patients undergoing arthroscopic rotator cuff repair were considered as potentially eligible for inclusion in this prospective case series. Preoperative MRAs were consecutively...
Article
Full-text available
When estimating knee kinematics from skin markers and stereophotogrammetry, multi-body optimization (MBO) has provided promising results for reducing soft tissue artefacts (STA), but can still be improved. The goal of this study was to assess the performance of MBO with subject-specific knee models at high knee flexion angles (up to 110°) against k...
Article
Full-text available
The heat and mass transfer through the garment to maintain the heat balance between the human body and the environment is dependent on the air gap thickness underneath the garment, which in turn is affected to a great extent by the body movement. Therefore, in this study, 3D garment simulation software was quantitatively validated by comparing the...
Article
Soft tissue artefact (STA) represents one of the main obstacles for obtaining accurate and reliable skeletal kinematics from motion capture. Many studies have addressed this issue, yet there is no consensus on the best available bone pose estimator and the expected errors associated with relevant results. Furthermore, results obtained by different...
Article
Full-text available
Introduction Codman's pendular shoulder exercises have been widely used for decades as means of passively mobilizing the glenohumeral (GH) joint while not compromising recently injured or repaired tissues. Neurophysiological studies have confirmed the largely passive nature of the exercises, but no studies have actually shown that the exercises res...
Article
Full-text available
Background Despite the fact that surgery is commonly used to treat glenohumeral instability, there is no evidence that such treatment effectively corrects glenohumeral translation. The purpose of this prospective clinical study was to analyze the effect of surgical stabilization on glenohumeral translation. Methods Glenohumeral translation was ass...
Article
Full-text available
Background Shoulder strength training exercises represent a major component of rehabilitation protocols designed for conservative or post-surgical management of shoulder pathologies. Numerous methods are described for exercising each shoulder muscle or muscle group. Limited information is available to assess potential deleterious effects of individ...
Article
Full-text available
The feeling of synchrony is fundamental for most social activities and prosocial behaviors. However, little is known about the behavioral correlates of this feeling and its modulation by intergroup differences. We previously showed that the subjective feeling of synchrony in subjects involved in a mirror imitation task was modulated by objective be...
Article
Full-text available
Despite the fact that surgery is commonly used to treat glenohumeral instability, there is no evidence that such treatment effectively corrects glenohumeral translation. The purpose of this prospective clinical study was to analyze the effect of surgical stabilization on glenohumeral translation. Glenohumeral translation was assessed in 11 patients...
Article
Full-text available
Study of technical, normative and narrative medieval literature and of archaeological pieces, allows the motor skills of armoured members of the aristocracy to be outlined, but not quantified. We present novel data on the impact of wearing armour on both the freedom of movement and the energy cost of locomotion and confront the results to systemati...
Conference Paper
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Real Virtuality is a multiuser immersive platform combining motion capture with virtual reality (VR) headsets: users can freely move within the physical space while virtually visiting a virtual world and interacting with 3D objects or other users using the sense of touch.
Article
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People performing actions together have a natural tendency to synchronize their behavior. Consistently, people doing a task together build internal representations not only of their actions and goals, but also of the other people performing the task. However, little is known about which are the behavioral mechanisms and the psychological factors af...