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Kobeissi H, Jilberto J, Karakan MÇ, Gao X, DePalma SJ, Das SL, Quach L, Urquia J, Baker BM, Chen CS, Nordsletten D, Lejeune E. MicroBundleCompute: Automated segmentation, tracking, and analysis of subdomain deformation in cardiac microbundles. PLoS One 2024; 19:e0298863. [PMID: 38530829 DOI: 10.1371/journal.pone.0298863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 02/01/2024] [Indexed: 03/28/2024] Open
Abstract
Advancing human induced pluripotent stem cell derived cardiomyocyte (hiPSC-CM) technology will lead to significant progress ranging from disease modeling, to drug discovery, to regenerative tissue engineering. Yet, alongside these potential opportunities comes a critical challenge: attaining mature hiPSC-CM tissues. At present, there are multiple techniques to promote maturity of hiPSC-CMs including physical platforms and cell culture protocols. However, when it comes to making quantitative comparisons of functional behavior, there are limited options for reliably and reproducibly computing functional metrics that are suitable for direct cross-system comparison. In addition, the current standard functional metrics obtained from time-lapse images of cardiac microbundle contraction reported in the field (i.e., post forces, average tissue stress) do not take full advantage of the available information present in these data (i.e., full-field tissue displacements and strains). Thus, we present "MicroBundleCompute," a computational framework for automatic quantification of morphology-based mechanical metrics from movies of cardiac microbundles. Briefly, this computational framework offers tools for automatic tissue segmentation, tracking, and analysis of brightfield and phase contrast movies of beating cardiac microbundles. It is straightforward to implement, runs without user intervention, requires minimal input parameter setting selection, and is computationally inexpensive. In this paper, we describe the methods underlying this computational framework, show the results of our extensive validation studies, and demonstrate the utility of exploring heterogeneous tissue deformations and strains as functional metrics. With this manuscript, we disseminate "MicroBundleCompute" as an open-source computational tool with the aim of making automated quantitative analysis of beating cardiac microbundles more accessible to the community.
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Affiliation(s)
- Hiba Kobeissi
- Department of Mechanical Engineering, Boston University, Boston, MA, United States of America
- Center for Multiscale and Translational Mechanobiology, Boston University, Boston, MA, United States of America
| | - Javiera Jilberto
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
| | - M Çağatay Karakan
- Department of Mechanical Engineering, Boston University, Boston, MA, United States of America
- Photonics Center, Boston University, Boston, MA, United States of America
- Department of Biomedical Engineering, Boston University, Boston, MA, United States of America
| | - Xining Gao
- Department of Biomedical Engineering, Boston University, Boston, MA, United States of America
- Harvard-MIT Program in Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, United States of America
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, United States of America
| | - Samuel J DePalma
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
| | - Shoshana L Das
- Department of Biomedical Engineering, Boston University, Boston, MA, United States of America
- Harvard-MIT Program in Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, United States of America
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, United States of America
| | - Lani Quach
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
| | - Jonathan Urquia
- Department of Electrical and Computer Engineering, New York Institute of Technology, New York, NY, United States of America
| | - Brendon M Baker
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
| | - Christopher S Chen
- Department of Biomedical Engineering, Boston University, Boston, MA, United States of America
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, United States of America
| | - David Nordsletten
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
- Department of Cardiac Surgery, University of Michigan, Ann Arbor, MI, United States of America
- Department of Biomedical Engineering, School of Imaging Sciences and Biomedical Engineering, King's Health Partners, King's College London, King's Health Partners, London, United Kingdom
| | - Emma Lejeune
- Department of Mechanical Engineering, Boston University, Boston, MA, United States of America
- Center for Multiscale and Translational Mechanobiology, Boston University, Boston, MA, United States of America
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Baleani M, Fraterrigo G, Erani P, Rota G, Berni M, Taddei F, Schileo E. Applying a homogeneous pressure distribution to the upper vertebral endplate: Validation of a new loading system, pilot application to human vertebral bodies, and finite element predictions of DIC measured displacements and strains. J Mech Behav Biomed Mater 2023; 140:105706. [PMID: 36841124 DOI: 10.1016/j.jmbbm.2023.105706] [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: 12/12/2022] [Revised: 01/24/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023]
Abstract
Image-based personalized Finite Element Models (pFEM) could detect alterations in physiological deformation of human vertebral bodies, but their accuracy has been seldom reported. Meaningful validation experiments should allow vertebral endplate deformability and ensure well-controlled boundary conditions. This study aimed to (i) validate a new loading system to apply a homogeneous pressure on the vertebral endplate during vertebral body compression regardless of endplate deformation; (ii) perform a pilot study on human vertebral bodies measuring surface displacements and strains with Digital Image Correlation (DIC); (iii) determine the accuracy of pFEM of the vertebral bodies. Homogeneous pressure application was achieved by pressurizing a fluid silicone encased in a rubber silicone film acting on the cranial endplate. The loading system was validated by comparing DIC-measured longitudinal strains and lower-end contact pressures, measured on three homogeneous pseudovertebrae of constant transversal section at 2.0 kN, against theoretically calculated values. Longitudinal strains and contact pressures were rather homogeneous, and their mean values close to theoretical calculations (5% underestimation). DIC measurements of surface longitudinal and circumferential displacements and strains were obtained on three human vertebral bodies at 2.0 kN. Complete displacement and strain maps were achieved for anterolateral aspects with random errors ≤0.2 μm and ≤30 μstrain, respectively. Venous plexus and double curvatures limited the completeness and accuracy of DIC data in posterior aspects. pFEM of vertebral bodies, including cortical bone mapping, were built from computed tomography images. In anterolateral aspects, pFEM accuracy of the three vertebrae was: (i) comparable to literature in terms of longitudinal displacements (R2>0.8); (ii) extended to circumferential displacements (pooled data: R2>0.9) and longitudinal strains (zero median error, 95% error: <27%). Circumferential strains were overestimated (median error: 39%). The new methods presented may permit to study how physiological and pathologic conditions influence the ability of vertebral endplates/bodies to sustain loads.
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Affiliation(s)
- Massimiliano Baleani
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Tecnologia Medica, Bologna, Italy.
| | - Giulia Fraterrigo
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Bioingegneria Computazionale, Bologna, Italy
| | - Paolo Erani
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Tecnologia Medica, Bologna, Italy
| | - Giulia Rota
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Tecnologia Medica, Bologna, Italy
| | - Matteo Berni
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Tecnologia Medica, Bologna, Italy
| | - Fulvia Taddei
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Bioingegneria Computazionale, Bologna, Italy
| | - Enrico Schileo
- IRCCS Istituto Ortopedico Rizzoli, Laboratorio di Bioingegneria Computazionale, Bologna, Italy.
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Sun X, Wu H, Shan B. Application of stereovision on a saddle-shaped membrane structure in aero-elastic wind tunnel test. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:035104. [PMID: 32259957 DOI: 10.1063/1.5137757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 02/17/2020] [Indexed: 06/11/2023]
Abstract
Some conventional measurements (e.g., accelerometer) are usually used to measure the aero-elastic responses of membrane structures in the field of civil engineering, which are usually measured by using contact sensors, and just one-dimensional data of a single point can be obtained. To deal with this disadvantage, a stereovision measurement is equipped after putting forward a series of algorithms. This newly formed measurement is adopted to measure the aero-elastic responses of a saddle-shaped membrane structure. Before measuring, a series of observations are carried out and discussed by considering the characteristic of the test model, wind tunnel, and interference from the inflow, which is merely mentioned in the previous research. Finally, the full field distribution of average displacement of membrane, under different wind directions and wind speeds, is given. The time history of full field displacement distribution is also presented as a gif file. This successful application implies that when adopting such a stereovision measurement system, it is necessary to optimize the installation of cameras. After an appropriate installation design, the proposed stereovision measurement will make up the disadvantages of conventional measurements and can obtain the full field aero-elastic responses of membrane structures.
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Affiliation(s)
- Xiaoying Sun
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
| | - Hangzi Wu
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
| | - Baohua Shan
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
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Jayyosi C, Bruyère-Garnier K, Coret M. Geometry of an inflated membrane in elliptic bulge tests: Evaluation of an ellipsoidal shape approximation by stereoscopic digital image correlation measurements. Med Eng Phys 2017; 48:150-157. [PMID: 28690047 DOI: 10.1016/j.medengphy.2017.06.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 05/09/2017] [Accepted: 06/14/2017] [Indexed: 10/19/2022]
Abstract
Elliptic bulge tests are conducted on liver capsule, a fibrous connective membrane, associated with a field measurement method to assess the global geometry of the samples during the tests. The experimental set up is derived from a previous experimental campaign of bulge tests under microscope. Here, a stereoscopic Digital Image Correlation (DIC) system is used to measure global parameters on the test and investigate some assumptions made on the testing conditions which could not been assessed with microscopic measurements. In particular, the assumption of an ellipsoidal shape of the inflated membrane is tested by comparing the actual sample shape measured by stereoscopic DIC with an idealized ellipsoidal shape. Results indicate that a rather constant gap exists between the idealized and actual position. The approximation in the calculation of a macroscopic strain through analytical modeling of the test is estimated here. The study of the liver capsule case shows that important differences can be observed in strain calculation depending on the method and assumptions taken. Therefore, analytical modeling of mechanical tests through ellipsoidal approximation needs to be carefully evaluated in every application. Here the field measurement allows assessing the validity of these modeling assumptions. Moreover, it gives precious details about the boundary conditions of the bulge test and revealed the heterogeneous clamping, highlighted by strain concentrations.
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Affiliation(s)
- C Jayyosi
- Univ Lyon, Université Claude Bernard Lyon 1, IFSTTAR, UMR_T9406, LBMC, F69622 Lyon, France
| | - K Bruyère-Garnier
- Univ Lyon, Université Claude Bernard Lyon 1, IFSTTAR, UMR_T9406, LBMC, F69622 Lyon, France.
| | - M Coret
- LUNAM Université, Université de Nantes, Ecole Centrale de Nantes, GEM, UMR CNRS 6183, Nantes, France
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