Mocap RSA

Mocap RSA

by | Mar 27, 2021

Mocap RSA

ROM analysis of RSA

Project Info

Start date:
January 2022

End date:
June 2023

Funding:
La Tour Hospital

Coordinator:
Artanim

Back

Summary

The goal of this project was to motion capture and simulate reverse shoulder prostheses (RSA) to evaluate post-operative ranges of motion during daily living activities. More specifically, we were interested at better understanding resulting glenohumeral and scapulo-thoracic motions, as well as kinematic changes after RSA.

The most challenging aspect of the project was to accurately reconstruct the post-operative prostheses of the patients. Indeed, the presence of metallic implants in CT can cause substantial image artifacts, which renders the 3D reconstruction difficult to perform. To solve this issue, patients were post-operatively scanned with a dedicated imaging protocol using a cone beam CT with reduced ionization, and a registration technique was developed to register the patients’ pre-operative 3D reconstructed bony models (scapula, humerus) and the CAD models of implants on the post-operative images.

In this project, Artanim was responsible for the segmentation and reconstruction of pre-operative and post-operative 3D bony and implants models, as well as for the dynamic simulation of reverse shoulder prostheses from motion capture data. The Haute Ecole de Santé was in charge of the post-operative registration.

Partners

Artanim
Motion capture and simulation of reverse shoulder prostheses

Haute Ecole de Santé (HEdS)
3D registration of RSA models

La Tour Hospital
Clinical tests

MRgHIFU Ablation of Liver Tumors

MRgHIFU Ablation of Liver Tumors

by | Nov 21, 2020

MRgHIFU Ablation of Liver Tumors

Minimally invasive intervention

Project Info

Start date:
July 2019

End date:
June 2023

Funding:
Swiss National Funds (SNF)

Coordinator:
HUG – Division of Radiology

Back

Summary

High intensity focused ultrasound (HIFU) is a precise method to thermally ablate deep-seated tumors in a non-invasive manner. A prerequisite for a safe and effective application of HIFU is image guidance, to plan and control the ablation process. The most suitable imaging modality is MRI, with its high soft tissue contrast and its ability to monitor tissue temperature changes (MR-guided HIFU, MRgHIFU). The therapy of abdominal organs, such as the liver, still poses several problems due to a moving target location caused by breathing, motion related MR-thermometry artefacts and near-field obstacles, i.e. thoracic cage or bowel.

The goal of this project is to treat unresectable liver malignancies with MRgHIFU, using fast volumetric ablation. Enlarged acoustic window and enhanced focusing number of the HIFU applicator, rapid automatic control of volumetric sonication, as well as self-scanning of the lesion by exploiting the respiratory motion are envisaged in this research.

In this project, Artanim was in charge of the segmentation of target region (tumor) and organs at risk, as well as the computation of the optimal transducer positioning of the robotic assistance system taking into account the segmented structures and the coverage target area.

Partners

University Hospitals of Geneva – Division of Radiology
Imaging, data analysis, transducer development, clinical tests and project coordination

Artanim
Segmentation of target region and organs at risk, transducer positioning

University Hospitals of Geneva – Division of Oncology
Clinical tests

Related Publications

Lorton O, Guillemin PC, M’Rad Y, Peloso A, Boudabbous S, Charbonnier C, Holman R, Crowe LA, Gui L, Poletti P-A, Ricoeur A, Terraz S, Salomir R. A Novel Concept of a Phased-Array HIFU Transducer Optimized for MR-Guided Hepatic Ablation: Embodiment and First In-Vivo Studies, Front Oncol, 30(12):899440, 2022.
PDF

 

Scapulo-Thoracic Alignment in B2 Glenoids

Scapulo-Thoracic Alignment in B2 Glenoids

by | Apr 25, 2019

Scapulo-Thoracic Alignment in B2 Glenoids

Dynamic analysis

Project Info

Start date:
April 2019

End date:
December 2019

Funding:
La Tour Hospital

Coordinator:
Artanim

Back

Summary

Altered scapulothoracic alignment may be a contributing pathoanatomic factor to the development of the B2 pattern of osteoarthritis. The purpose of this study was to use a patient-specific 3D measurement technique coupling medical imaging and optical motion capture to evaluate and compare scapulothoracic alignment in patients with B2 glenoids. The results of this study may improve our understanding of glenohumeral pathoanatomy and posterior glenoid erosion patterns, and assist with osteoarthritis prevention.

In this project, Artanim was responsible for dynamically simulating shoulders from kinematic data.

Partners

Artanim
Modeling and simulation of the shoulder

La Tour Hospital – Division of Orthopedic and Trauma Surgery
Clinical tests

Imaging center Rive Droite SA
Radiological acquisitions 

Related Publications

Lädermann A, Athwal GS, Bothorel H, Collin P, Mazzolari A, Raiss P, Charbonnier C. Scapulothoracic Alignment Alterations in Patients with Walch Type B Osteoarthritis: An In Vivo Dynamic Analysis and Prospective Comparative Study, J Clin Med, 10(1):66, 2021.
PDF

 

 

Reverse Shoulder Arthroplasty

Reverse Shoulder Arthroplasty

by | Dec 2, 2017

Reverse Shoulder Arthroplasty

Dynamic simulation of RSA

Project Info

Start date:
January 2017

End date:
December 2017

Funding:
Hirslanden Clinique La Colline

Coordinator:
Artanim

Back

Summary

The goal of this project was to simulate reverse shoulder prostheses (RSA) to evaluate the variability of several biomechanical factors and the impact on the range of motion. In particular, we were interested in evaluating the effect of glenoid lateralization, humeral inclination and critical shoulder angle (CSA). These computer-assisted simulations provided operating parameters which aimed to minimize the onset of articular conflicts and luxations.

In this project, Artanim was responsible for dynamically simulating reverse shoulder prostheses from kinematic data.

Partners

Artanim
Simulation of reverse shoulder prostheses

Hirslanden Clinique La Colline – Division of Orthopedic and Trauma Surgery
Clinical tests

Related Publications

A. Läderman, E. Tay, P. Collin, S. Piotton, J.C.H. Chiu, A. Michelet, C. Charbonnier. Effect of critical shoulder angle, glenoid lateralization and humeral inclination on range of motion in reverse shoulder arthroplasty, Bone Joint Res, 8:378-386, 2019.
PDF

C. Charbonnier, E. Tay, P. Collin, S. Piotton, J.C.H. Chiu, A. Michelet, A. Läderman. Effect of critical shoulder angle, glenoid lateralization and humeral inclination on ROM in reverse shoulder arthroplasty, Swiss Med Wkly, 149(Suppl. 236):2S, 2019.
PDF

 

 

ArthroPlanner

ArthroPlanner

by | Oct 14, 2016

ArthroPlanner

Surgical planning solutions

Project Info

Start date:
November 2014

End date:
October 2016

Funding:
Private

Coordinator:
Artanim

Back

Summary

The goal of this project was to develop several surgical planning tools taking into account both the anatomy and kinematics of the patient’s joint. We intended to continue and extended our previous research works by integrating them into a 3D surgical planning solution, called ArthroPlanner, which could be used in clinical routine and could thus directly benefit patients.

This project mainly aimed at developing solutions for the dynamic planning of the hip and shoulder and at extending our work to the knee.

Related Publications

Lädermann A, Chagué S, Preissmann D, Kolo FC, Zbinden O, Kevelham B, Bothorel H, Charbonnier C. Acromioplasty during repair of rotator cuff tears removes only half of the impinging acromial bone, JSES Open Access, 4(3):592-600, 2020.
PDF

Lädermann A, Chagué S, Preissmann D, Kolo FC, Rime O, Kevelham B, Bothorel H, Charbonnier C. Guided versus Freehand acromioplasty during rotator cuff repair. A randomized prospective study, Orthop Traumatol Surg Res, 106(4):651-659, 2020.
PDF

Lädermann A, Chagué S, Preissmann D, Kolo FC, Rime O, Kevelham B, Bothorel H, Charbonnier C. L’acromioplastie guidée comparée à l’acromioplastie à main levée dans la réparation de la coiffe des rotateurs. Une étude prospective randomisée, Revue de chirurgie orthopédique et traumatologique, 106(4):372-380, 2020.
PDF

Charbonnier C, Duthon VB, Chagué S, Kolo FC, Ménétrey J. In Vivo Static and Dynamic Lengthening Measurements of the Posterior Cruciate Ligament at High Knee Flexion Angles, Int J CARS, 15(3):555-564, 2020.
PDF

Charbonnier C, Chagué S, Kevelham B, Preissmann D, Kolo FC, Rime O, Lädermann A. ArthroPlanner: A Surgical Planning Solution for Acromioplasty, Int J CARS, 13(12):2009-2019, 2018.
PDF

Charbonnier C, Chagué S, Kolo FC, Duthon VB, Menetrey J. Multi-body Optimization with Subject-Specific Knee Models: Performance at High Knee Flexion Angles, Comput Meth Biomech Biomed Eng, 20(14):1571-1579, 2017.
PDF

Lädermann A, Kolo FC, Chagué S, Charbonnier C. Is acromioplasty planification useful? A prospective randomized trial, XIVe Congrès de la Société Francophone d’Arthroscopie, Paris, France, Revue de chirurgie orthopédique et traumatologique, 103(8):S268, September 2017.
PDF

Charbonnier C, Kolo FC, Lädermann A. Acromioplasty Planification: A Randomized Prospective Study, 27th Annual Congress of the European Shoulder and Elbow Society (SECEC), Berlin, Germany, September 2017.
PDF

Charbonnier C, Chagué S, Kevelham B, Kolo FC, Lädermann A. ArthroPlanner: A Surgical Planning Solution for Acromioplasty, 30th International Congress of Computer Assisted Radiology and Surgery, Heidelberg, Germany, Int J CARS, June 2016.
PDF