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Malukhin K, Rabczuk T, Ehmann K, Verta MJ. Kirchhoff's law-based velocity-controlled motion models to predict real-time cutting forces in minimally invasive surgeries. J Mech Behav Biomed Mater 2024; 154:106523. [PMID: 38554581 DOI: 10.1016/j.jmbbm.2024.106523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 03/06/2024] [Accepted: 03/21/2024] [Indexed: 04/01/2024]
Abstract
A theoretical framework, united by a "system effect" is formulated to model the cutting/haptic force evolution at the cutting edge of a surgical cutting instrument during its penetration into soft biological tissue in minimally invasive surgery. Other cutting process responses, including tissue fracture force, friction force, and damping, are predicted by the model as well. The model is based on a velocity-controlled formulation of the corresponding equations of motion, derived for a surgical cutting instrument and tissue based on Kirchhoff's fundamental energy conservation law. It provides nearly zero residues (absolute errors) in the equations of motion balances. In addition, concurrent closing relationships for the fracture force, friction coefficient, friction force, process damping, strain rate function (a constitutive tissue model), and their implementation within the proposed theoretical framework are established. The advantage of the method is its ability to make precise real-time predictions of the aperiodic fluctuating evolutions of the cutting forces and the other process responses. It allows for the robust modeling of the interactions between a medical instrument and a nonlinear viscoelastic tissue under any physically feasible working conditions. The cutting process model was partially qualitatively verified through numerical simulations and by comparing the computed cutting forces with experimentally measured values during robotic uniaxial biopsy needle constant velocity insertion into artificial gel tissue, obtained from previous experimental research. The comparison has shown a qualitatively similar adequate trend in the evolution of the experimentally measured and numerically predicted cutting forces during insertion of the needle.
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Affiliation(s)
- Kostyantyn Malukhin
- Northwestern University, Department of Mechanical Engineering, McCormick School of Engineering, 2145 Sheridan Road, Evanston, IL, 60208, USA.
| | - Timon Rabczuk
- Bauhaus University, Department of Computational Mechanics, School of Civil Engineering, Marienstrasse 15, Weimar, 99423, Germany
| | - Kornel Ehmann
- Northwestern University, Department of Mechanical Engineering, McCormick School of Engineering, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Michael J Verta
- Northwestern University, Feinberg School of Medicine, Department of Surgery, 420 E. Superior St., Chicago, IL, 60611, USA
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2
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Chen J, Sun Y, Liu Q, Yip J, Yick KL. Construction of multi-component finite element model to predict biomechanical behaviour of breasts during running and quantification of the stiffness impact of internal structure. Biomech Model Mechanobiol 2024:10.1007/s10237-024-01862-2. [PMID: 38806750 DOI: 10.1007/s10237-024-01862-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 05/15/2024] [Indexed: 05/30/2024]
Abstract
This study aims to investigate the biomechanical behaviour and the stiffness impact of the breast internal components during running. To achieve this, a novel nonlinear multi-component dynamic finite element method (FEM) has been established, which uses experimental data obtained via 4D scanning technology and a motion capture system. The data are used to construct a geometric model that comprises the rigid body, layers of soft tissues, skin, pectoralis major muscle, fat, ligaments and glandular tissues. The traditional point-to-point method has a relative mean absolute error of less than 7.92% while the latest surface-to-surface method has an average Euclidean distance (d) of 7.05 mm, validating the simulated results. After simulating the motion of the different components of the breasts, the displacement analysis confirms that when the motion reaches the moment of largest displacement, the displacement of the breast components is proportional to their distance from the chest wall. A biomechanical analysis indicates that the stress sustained by the breast components in ascending order is the glandular tissues, pectoralis major muscle, adipose tissues, and ligaments. The ligaments provide the primary support during motion, followed by the pectoralis major muscle. In addition, specific stress points of the breast components are identified. The stiffness impact experiment indicates that compared with ligaments, the change of glandular tissue stiffness had a slightly more obvious effect on the breast surface. The findings serve as a valuable reference for the medical field and sports bra industry to enhance breast protection during motion.
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Affiliation(s)
- Jiazhen Chen
- School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Yue Sun
- School of Fashion Design and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Qilong Liu
- School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Joanne Yip
- School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Kit-Lun Yick
- School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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3
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Duraes M, Briot N, Connesson N, Chagnon G, Payan Y, Duflos C, Rathat G, Captier G, Subsol G, Herlin C. Evaluation of breast skin and tissue stiffness using a non-invasive aspiration device and impact of clinical predictors. Clin Anat 2024; 37:329-336. [PMID: 38174585 DOI: 10.1002/ca.24134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 12/01/2023] [Accepted: 12/21/2023] [Indexed: 01/05/2024]
Abstract
A personalized 3D breast model could present a real benefit for preoperative discussion with patients, surgical planning, and guidance. Breast tissue biomechanical properties have been poorly studied in vivo, although they are important for breast deformation simulation. The main objective of our study was to determine breast skin thickness and breast skin and adipose/fibroglandular tissue stiffness. The secondary objective was to assess clinical predictors of elasticity and thickness: age, smoking status, body mass index, contraception, pregnancies, breastfeeding, menopausal status, history of radiotherapy or breast surgery. Participants were included at the Montpellier University Breast Surgery Department from March to May 2022. Breast skin thickness was measured by ultrasonography, breast skin and adipose/fibroglandular tissue stiffnesses were determined with a VLASTIC non-invasive aspiration device at three different sites (breast segments I-III). Multivariable linear models were used to assess clinical predictors of elasticity and thickness. In this cohort of 196 women, the mean breast skin and adipose/fibroglandular tissue stiffness values were 39 and 3 kPa, respectively. The mean breast skin thickness was 1.83 mm. Only menopausal status was significantly correlated with breast skin thickness and adipose/fibroglandular tissue stiffness. The next step will be to implement these stiffness and thickness values in a biomechanical breast model and to evaluate its capacity to predict breast tissue deformations.
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Affiliation(s)
- Martha Duraes
- Department of Breast Surgery, Montpellier University Hospital, Montpellier, France
- Faculty of Medicine Montpellier-Nîmes, Laboratory of Anatomy of Montpellier, Montpellier University, Montpellier, France
- Research-Team ICAR, LIRMM, University of Montpellier, Montpellier, France
| | - Noemie Briot
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, Grenoble, France
| | - Nathanael Connesson
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, Grenoble, France
| | - Gregory Chagnon
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, Grenoble, France
| | - Yohan Payan
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, Grenoble, France
| | - Claire Duflos
- Department of Clinical Unit Epidemiology, Montpellier University Hospital, Montpellier, France
| | - Gauthier Rathat
- Department of Breast Surgery, Montpellier University Hospital, Montpellier, France
| | - Guillaume Captier
- Faculty of Medicine Montpellier-Nîmes, Laboratory of Anatomy of Montpellier, Montpellier University, Montpellier, France
- Research-Team ICAR, LIRMM, University of Montpellier, Montpellier, France
| | - Gerard Subsol
- Research-Team ICAR, LIRMM, University of Montpellier, Montpellier, France
| | - Christian Herlin
- Research-Team ICAR, LIRMM, University of Montpellier, Montpellier, France
- Department of Plastic Surgery, Montpellier University Hospital, Montpellier, France
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4
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Brown T, Harvie F, Kluess D. Testing Mechanical Properties of Silicone Gel-Filled Breast Implants and Their Degradation. Aesthetic Plast Surg 2024:10.1007/s00266-024-03886-6. [PMID: 38438757 DOI: 10.1007/s00266-024-03886-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 01/30/2024] [Indexed: 03/06/2024]
Abstract
Breast augmentation procedures using silicone implants have become increasingly popular over the past six decades. This article addresses the concerns of patients regarding implant strength by providing clinicians with valuable information in addition to video and pictorial evidence to share, fostering reassurance. The article focuses on the structural integrity and stability of breast implants, which play a critical role in their long-term performance and patient satisfaction. Specifically, it examines the industry standards outlined by the International Organization for Standardization (ISO), with a particular emphasis on ISO14607-2018, which encompasses a range of mechanical and physio-mechanical tests, including the assessment of silicone gel-fill firmness, evaluation of shell integrity, and examination of the impact of environmental conditions on implant performance. Breast implants are not static devices and are subject to aging and fatigue-based degradation. This emphasizes the need for ongoing monitoring and evaluation to ensure the long-term safety and satisfaction of patients. By providing a comprehensive examination of breast implant structure and industry standards, this article equips clinicians with the necessary knowledge to address patient concerns and foster confidence in the safety and longevity of breast augmentation procedures using silicone implants.Level of Evidence III This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
| | - Fraser Harvie
- NEX2GEN, Bayhead, Isle of North Uist, Scotland, HS6 5DS, UK
| | - Daniel Kluess
- INNOPROOF GmbH, Joachim-Jungius-Straße 9, 18059, D-Rostock, Germany
- Department of Orthopaedics, Rostock University Medical Center, Doberaner Strasse 142, 18057, Rostock, Germany
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5
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Pan F, Khoo K, Maso Talou GD, Song F, McGhee D, Doyle AJ, Nielsen PMF, Nash MP, Babarenda Gamage TP. Quantifying changes in shoulder orientation between the prone and supine positions from magnetic resonance imaging. Clin Biomech (Bristol, Avon) 2024; 111:106157. [PMID: 38103526 DOI: 10.1016/j.clinbiomech.2023.106157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 11/22/2023] [Accepted: 11/24/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Predicting breast tissue motion using biomechanical models can provide navigational guidance during breast cancer treatment procedures. These models typically do not account for changes in posture between procedures. Difference in shoulder position can alter the shape of the pectoral muscles and breast. A greater understanding of the differences in the shoulder orientation between prone and supine could improve the accuracy of breast biomechanical models. METHODS 19 landmarks were placed on the sternum, clavicle, scapula, and humerus of the shoulder girdle in prone and supine breast MRIs (N = 10). These landmarks were used in an optimization framework to fit subject-specific skeletal models and compare joint angles of the shoulder girdle between these positions. FINDINGS The mean Euclidean distance between joint locations from the fitted skeletal model and the manually identified joint locations was 15.7 mm ± 2.7 mm. Significant differences were observed between prone and supine. Compared to supine position, the shoulder girdle in the prone position had the lateral end of the clavicle in more anterior translation (i.e., scapula more protracted) (P < 0.05), the scapula in more protraction (P < 0.01), the scapula in more upward rotation (associated with humerus elevation) (P < 0.05); and the humerus more elevated (P < 0.05) for both the left and right sides. INTERPRETATION Shoulder girdle orientation was found to be different between prone and supine. These differences would affect the shape of multiple pectoral muscles, which would affect breast shape and the accuracy of biomechanical models.
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Affiliation(s)
- Fangchao Pan
- Auckland Bioengineering Institute, University of Auckland, New Zealand
| | - Kejia Khoo
- Auckland Bioengineering Institute, University of Auckland, New Zealand
| | | | - Freda Song
- Faculty of Medical and Health Sciences, University of Auckland, New Zealand
| | - Deirdre McGhee
- Biomechanics Research Laboratory, University of Wollongong, NSW, Australia
| | - Anthony J Doyle
- Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, New Zealand; Te Whatu Ora, Health New Zealand, New Zealand
| | - Poul M F Nielsen
- Auckland Bioengineering Institute, University of Auckland, New Zealand; Department of Engineering Science and Biomedical Engineering, University of Auckland, New Zealand
| | - Martyn P Nash
- Auckland Bioengineering Institute, University of Auckland, New Zealand; Department of Engineering Science and Biomedical Engineering, University of Auckland, New Zealand
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6
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Mazier A, Bordas SPA. Breast simulation pipeline: From medical imaging to patient-specific simulations. Clin Biomech (Bristol, Avon) 2024; 111:106153. [PMID: 38061204 DOI: 10.1016/j.clinbiomech.2023.106153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 01/16/2024]
Abstract
BACKGROUND Breast-conserving surgery is the most acceptable operation for breast cancer removal from an invasive and psychological point of view. Before the surgical procedure, a preoperative MRI is performed in the prone configuration, while the surgery is achieved in the supine position. This leads to a considerable movement of the breast, including the tumor, between the two poses, complicating the surgeon's task. METHODS In this work, a simulation pipeline allowing the computation of patient-specific geometry and the prediction of personalized breast material properties was put forward. Through image segmentation, a finite element model including the subject-specific geometry is established. By first computing an undeformed state of the breast, the geometrico-material model is calibrated by surface acquisition in the intra-operative stance. FINDINGS Using an elastic corotational formulation, the patient-specific mechanical properties of the breast and skin were identified to obtain the best estimates of the supine configuration. The final results are a shape-fitting closest point residual of 4.00 mm for the mechanical parameters Ebreast=0.32 kPa and Eskin=22.72 kPa, congruent with the current state-of-the-art. The Covariance Matrix Adaptation Evolution Strategy optimizer converges on average between 5 to 30 min depending on the initial parameters, reaching a simulation speed of 20 s. To our knowledge, our model offers one of the best compromises between accuracy and speed. INTERPRETATION Satisfactory results were obtained for the estimation of breast deformation from preoperative to intra-operative configuration. Furthermore, we have demonstrated the clinical feasibility of such applications using a simulation framework that aims at the smallest disturbance of the actual surgical pipeline.
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Affiliation(s)
- Arnaud Mazier
- Institute of Computational Engineering, Department of Engineering, Université du Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Stéphane P A Bordas
- Institute of Computational Engineering, Department of Engineering, Université du Luxembourg, Esch-sur-Alzette, Luxembourg.
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7
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Ringel MJ, Richey WL, Heiselman JS, Meszoely IM, Miga MI. Incorporating heterogeneity and anisotropy for surgical applications in breast deformation modeling. Clin Biomech (Bristol, Avon) 2023; 104:105927. [PMID: 36890069 PMCID: PMC10122703 DOI: 10.1016/j.clinbiomech.2023.105927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/17/2023] [Accepted: 02/23/2023] [Indexed: 03/10/2023]
Abstract
BACKGROUND Simulating soft-tissue breast deformations is of interest for many applications including image fusion, longitudinal registration, and image-guided surgery. For the surgical use case, positional changes cause breast deformations that compromise the use of preoperative imaging to inform tumor excision. Even when acquiring imaging in the supine position, which better reflects surgical presentation, deformations still occur due to arm motion and orientation changes. A biomechanical modeling approach to simulate supine breast deformations for surgical applications must be both accurate and compatible with the clinical workflow. METHODS A supine MR breast imaging dataset from n = 11 healthy volunteers was used to simulate surgical deformations by acquiring images in arm-down and arm-up positions. Three linear-elastic modeling approaches with varying levels of complexity were used to predict deformations caused by this arm motion: a homogeneous isotropic model, a heterogeneous isotropic model, and a heterogeneous anisotropic model using a transverse-isotropic constitutive model. FINDINGS The average target registration errors for subsurface anatomical features were 5.4 ± 1.5 mm for the homogeneous isotropic model, 5.3 ± 1.5 mm for the heterogeneous isotropic model, and 4.7 ± 1.4 mm for the heterogeneous anisotropic model. A statistically significant improvement in target registration error was observed between the heterogeneous anisotropic model and both the homogeneous and the heterogeneous isotropic models (P < 0.01). INTERPRETATION While a model that fully incorporates all constitutive complexities of anatomical structure likely achieves the best accuracy, a computationally tractable heterogeneous anisotropic model provided significant improvement and may be applicable for image-guided breast surgeries.
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Affiliation(s)
- Morgan J Ringel
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA; Vanderbilt Institute for Surgery and Engineering, Nashville, TN, USA.
| | - Winona L Richey
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA; Vanderbilt Institute for Surgery and Engineering, Nashville, TN, USA
| | - Jon S Heiselman
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA; Vanderbilt Institute for Surgery and Engineering, Nashville, TN, USA; Memorial Sloan-Kettering Cancer Center, Department of Surgery, NY, New York, USA
| | - Ingrid M Meszoely
- Vanderbilt University Medical Center, Division of Surgical Oncology, Nashville, TN, USA
| | - Michael I Miga
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA; Vanderbilt Institute for Surgery and Engineering, Nashville, TN, USA; Vanderbilt University, Department of Radiology and Radiological Sciences, Nashville, TN, USA; Vanderbilt University Medical Center, Department of Neurological Surgery, Nashville, TN, USA; Vanderbilt University Medical Center, Department of Otolaryngology-Head and Neck Surgery, Nashville, TN, USA
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8
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Lavigne T, Mazier A, Perney A, Bordas SPA, Hild F, Lengiewicz J. Digital Volume Correlation for large deformations of soft tissues: Pipeline and proof of concept for the application to breast ex vivo deformations. J Mech Behav Biomed Mater 2022; 136:105490. [PMID: 36228403 DOI: 10.1016/j.jmbbm.2022.105490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/21/2022] [Accepted: 09/26/2022] [Indexed: 11/26/2022]
Abstract
Being able to reposition tumors from prone imaging to supine surgery stances is key for bypassing current invasive marking used for conservative breast surgery. This study aims to demonstrate the feasibility of using Digital Volume Correlation (DVC) to measure the deformation of a female quarter thorax between two different body positioning when subjected to gravity. A segmented multipart mesh (bones, cartilage and tissue) was constructed and a three-step FE-based DVC procedure with heterogeneous elastic regularization was implemented. With the proposed framework, the large displacement field of a hard/soft breast sample was recovered with low registration residuals and small error between the measured and manually determined deformations of phase interfaces. The present study showed the capacity of FE-based DVC to faithfully capture large deformations of hard/soft tissues.
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Affiliation(s)
- T Lavigne
- Institute of Computational Engineering, Department of Engineering, University of Luxembourg, 6, avenue de la Fonte, Esch-sur-Alzette, L-4364, Luxembourg
| | - A Mazier
- Institute of Computational Engineering, Department of Engineering, University of Luxembourg, 6, avenue de la Fonte, Esch-sur-Alzette, L-4364, Luxembourg
| | - A Perney
- Institute of Computational Engineering, Department of Engineering, University of Luxembourg, 6, avenue de la Fonte, Esch-sur-Alzette, L-4364, Luxembourg; Centre des Materiaux, Mines ParisTech, PSL University, 63-65 Rue Henri Auguste Desbrueres, Corbeil-Essonnes, 91100, France
| | - S P A Bordas
- Institute of Computational Engineering, Department of Engineering, University of Luxembourg, 6, avenue de la Fonte, Esch-sur-Alzette, L-4364, Luxembourg; Visiting professor at Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
| | - F Hild
- University Paris-Saclay, CentraleSupelec, ENS Paris-Saclay, CNRS, LMPS-Laboratoire de Mecanique Paris-Saclay, 4 avenue des Sciences, 91190, Gif-sur-Yvette, France
| | - J Lengiewicz
- Institute of Computational Engineering, Department of Engineering, University of Luxembourg, 6, avenue de la Fonte, Esch-sur-Alzette, L-4364, Luxembourg; Institute of Fundamental Technological Research, Polish Academy of Sciences (IPPT PAN), Pawinskiego 5B, Warsaw, 02-106, Poland
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9
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Alcañiz P, Vivo de Catarina C, Gutiérrez A, Pérez J, Illana C, Pinar B, Otaduy MA. Soft-tissue simulation of the breast for intraoperative navigation and fusion of preoperative planning. Front Bioeng Biotechnol 2022; 10:976328. [PMID: 36246364 PMCID: PMC9554225 DOI: 10.3389/fbioe.2022.976328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/07/2022] [Indexed: 11/13/2022] Open
Abstract
Computational preoperative planning offers the opportunity to reduce surgery time and patient risk. However, on soft tissues such as the breast, deviations between the preoperative and intraoperative settings largely limit the applicability of preoperative planning. In this work, we propose a high-performance accurate simulation model of the breast, to fuse preoperative information with the intraoperative deformation setting. Our simulation method encompasses three major elements: high-quality finite-element modeling (FEM), efficient handling of anatomical couplings for high-performance computation, and personalized parameter estimation from surface scans. We show the applicability of our method on two problems: 1) transforming high-quality preoperative scans to the intraoperative setting for fusion of preoperative planning data, and 2) real-time tracking of breast tumors for navigation during intraoperative radiotherapy. We have validated our methodology on a test cohort of nine patients who underwent tumor resection surgery and intraoperative radiotherapy, and we have quantitatively compared simulation results to intraoperative scans. The accuracy of our simulation results suggest clinical viability of the proposed methodology.
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Affiliation(s)
- Patricia Alcañiz
- Computer science department, Universidad Rey Juan Carlos, Madrid, Spain
- GMV Innovating Solutions, Madrid, Spain
- *Correspondence: Patricia Alcañiz,
| | - César Vivo de Catarina
- Computer science department, Universidad Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Alessandro Gutiérrez
- Fundación Para La Investigación Biomédica Del Hospital Universitario La Paz, Madrid, Spain
| | - Jesús Pérez
- Computer science department, Universidad Rey Juan Carlos, Madrid, Spain
| | | | - Beatriz Pinar
- Medical Physics department, Hospital Universitario Doctor Negrín, Las Palmas de Gran Canaria, Spain
| | - Miguel A. Otaduy
- Computer science department, Universidad Rey Juan Carlos, Madrid, Spain
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10
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Wang K, Kesavadas T. Validation of FEA-based breast deformation simulation using an artificial neural network. INFORMATICS IN MEDICINE UNLOCKED 2022. [DOI: 10.1016/j.imu.2022.101044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
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11
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Briot N, Chagnon G, Burlet L, Gil H, Girard E, Payan Y. Experimental characterisation and modelling of breast Cooper's ligaments. Biomech Model Mechanobiol 2022; 21:1157-1168. [PMID: 35482144 PMCID: PMC9047630 DOI: 10.1007/s10237-022-01582-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 03/25/2022] [Indexed: 11/24/2022]
Abstract
The aim of this study was to characterise the mechanical behaviour of Cooper's ligaments. Such ligaments are collagenous breast tissue that create a three-dimensional structure over the entire breast volume. Ten ligaments were extracted from a human cadaver, from which 28 samples were cut and used to perform uniaxial tensile tests. Histological analysis showed that the main direction of the fibres visible to the naked eye corresponds to the orientation of the fibres on a microscopic scale. The specimens were cut according to this orientation, which allowed the sample to be stretched in the main fibre direction. From these experimental stretch/stress curves, an original anisotropic hyperelastic constitutive law is proposed to model the behaviour of Cooper's ligaments and the material parameter validity is discussed.
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Affiliation(s)
- N Briot
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000, Grenoble, France.
| | - G Chagnon
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000, Grenoble, France
| | - L Burlet
- Laboratoire d'Anatomie des Alpes Française, Faculté de Médecine, Domaine de la Merci, 38700, La Tronche Cedex, France
| | - H Gil
- Département d'anatomopathologie et cytologie, Centre Hospitalier Grenoble-Alpes, 38000, Grenoble, France
| | - E Girard
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, CHU Grenoble Alpes, TIMC, 38000, Grenoble, France.,Laboratoire d'Anatomie des Alpes Française, Faculté de Médecine, Domaine de la Merci, 38700, La Tronche Cedex, France
| | - Y Payan
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000, Grenoble, France
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12
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Abstract
Although half the world's population will develop breasts, there is limited research documenting breast structure or motion. Understanding breast structure and motion, however, is imperative for numerous applications, such as breast reconstruction, breast modeling to better diagnose and treat breast pathologies, and designing effective sports bras. To be impactful, future breast biomechanics research needs to fill gaps in our knowledge, particularly related to breast composition and density, and to improve methods to accurately measure the complexities of three-dimensional breast motion. These methods should then be used to investigate breast biomechanics while individuals, who represent the full spectrum of women in the population, participate in a broad range of activities of daily living and recreation.
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Affiliation(s)
- Deirdre E McGhee
- Biomechanics Research Laboratory, University of Wollongong, Wollongong, Australia
| | - Julie R Steele
- Biomechanics Research Laboratory, University of Wollongong, Wollongong, Australia
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13
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Abstract
More systematic breast biomechanics research and better translation of the research outcomes are necessary to provide information upon which to design better sports bras and to develop effective evidence-based strategies to alleviate exercise-induced breast pain for women who want to participate in physical activity in comfort.
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Affiliation(s)
- Deirdre E McGhee
- Biomechanics Research Laboratory, School of Medicine, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, Australia
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14
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Ruud KF, Hiscox WC, Yu I, Chen RK, Li W. Distinct phenotypes of cancer cells on tissue matrix gel. Breast Cancer Res 2020; 22:82. [PMID: 32736579 PMCID: PMC7395363 DOI: 10.1186/s13058-020-01321-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 07/23/2020] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Breast cancer cells invading the connective tissues outside the mammary lobule or duct immerse in a reservoir of extracellular matrix (ECM) that is structurally and biochemically distinct from that of their site of origin. The ECM is a spatial network of matrix proteins, which not only provide physical support but also serve as bioactive ligands to the cells. It becomes evident that the dimensional, mechanical, structural, and biochemical properties of ECM are all essential mediators of many cellular functions. To better understand breast cancer development and cancer cell biology in native tissue environment, various tissue-mimicking culture models such as hydrogel have been developed. Collagen I (Col I) and Matrigel are the most common hydrogels used in cancer research and have opened opportunities for addressing biological questions beyond the two-dimensional (2D) cell cultures. Yet, it remains unclear whether these broadly used hydrogels can recapitulate the environmental properties of tissue ECM, and whether breast cancer cells grown on CoI I or Matrigel display similar phenotypes as they would on their native ECM. METHODS We investigated mammary epithelial cell phenotypes and metabolic profiles on animal breast ECM-derived tissue matrix gel (TMG), Col I, and Matrigel. Atomic force microscopy (AFM), fluorescence microscopy, acini formation assay, differentiation experiments, spatial migration/invasion assays, proliferation assay, and nuclear magnetic resonance (NMR) spectroscopy were used to examine biological phenotypes and metabolic changes. Student's t test was applied for statistical analyses. RESULTS Our data showed that under a similar physiological stiffness, the three types of hydrogels exhibited distinct microstructures. Breast cancer cells grown on TMG displayed quite different morphologies, surface receptor expression, differentiation status, migration and invasion, and metabolic profiles compared to those cultured on Col I and Matrigel. Depleting lactate produced by glycolytic metabolism of cancer cells abolished the cell proliferation promoted by the non-tissue-specific hydrogel. CONCLUSION The full ECM protein-based hydrogel system may serve as a biologically relevant model system to study tissue- and disease-specific pathological questions. This work provides insights into tissue matrix regulation of cancer cell biomarker expression and identification of novel therapeutic targets for the treatment of human cancers based on tissue-specific disease modeling.
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Affiliation(s)
- Kelsey F Ruud
- Department of Biomedical Sciences, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, 99202, USA
| | - William C Hiscox
- Center for NMR Spectroscopy, Washington State University, Pullman, WA, 99164, USA
| | - Ilhan Yu
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, USA
| | - Roland K Chen
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, USA
| | - Weimin Li
- Department of Biomedical Sciences, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, 99202, USA.
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15
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The Paper Mache Bra: A Postsurgical Breast Taping Technique. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2020; 7:e2407. [PMID: 31942386 PMCID: PMC6908377 DOI: 10.1097/gox.0000000000002407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 06/26/2019] [Indexed: 11/26/2022]
Abstract
Little has been published about dressing the breast after surgery and the potential benefits of added support to the routine use of a nonwired bra postoperatively. We report a postsurgical breast taping method and suggest its use might help reduce minor postsurgical complications and subsequent impaired scarring.
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16
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Babarenda Gamage TP, Malcolm DTK, Maso Talou G, Mîra A, Doyle A, Nielsen PMF, Nash MP. An automated computational biomechanics workflow for improving breast cancer diagnosis and treatment. Interface Focus 2019; 9:20190034. [PMID: 31263540 DOI: 10.1098/rsfs.2019.0034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2019] [Indexed: 12/24/2022] Open
Abstract
Clinicians face many challenges when diagnosing and treating breast cancer. These challenges include interpreting and co-locating information between different medical imaging modalities that are used to identify tumours and predicting where these tumours move to during different treatment procedures. We have developed a novel automated breast image analysis workflow that integrates state-of-the-art image processing and machine learning techniques, personalized three-dimensional biomechanical modelling and population-based statistical analysis to assist clinicians during breast cancer detection and treatment procedures. This paper summarizes our recent research to address the various technical and implementation challenges associated with creating a fully automated system. The workflow is applied to predict the repositioning of tumours from the prone position, where diagnostic magnetic resonance imaging is performed, to the supine position where treatment procedures are performed. We discuss our recent advances towards addressing challenges in identifying the mechanical properties of the breast and evaluating the accuracy of the biomechanical models. We also describe our progress in implementing a prototype of this workflow in clinical practice. Clinical adoption of these state-of-the-art modelling techniques has significant potential for reducing the number of misdiagnosed breast cancers, while also helping to improve the treatment of patients.
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Affiliation(s)
| | - Duane T K Malcolm
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Gonzalo Maso Talou
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Anna Mîra
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Anthony Doyle
- Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Poul M F Nielsen
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Department of Engineering Science, University of Auckland, Auckland, New Zealand
| | - Martyn P Nash
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Department of Engineering Science, University of Auckland, Auckland, New Zealand
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