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In-vivo Strain and Stress Estimation of the Left Ventricle from MRI Images
[chapter]
2002
Lecture Notes in Computer Science
Preserved Fulltext
In this paper, we present a novel statistical model to estimate the invivo material properties and strain and stress distribution in the left ventricle. ...
Little information is known about in-vivo heart strain and stress distribution. ...
Acknowledgements This research has been funded by grants from the NIH. ...
doi:10.1007/3-540-45786-0_87
fatcat:7yuvbvb6fncgzafffaiikqngoq
In vivo strain and stress estimation of the heart left and right ventricles from MRI images
2003
Medical Image Analysis
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We composite material model for the stress estimation of the in applied the residual stress at the end of diastole to make vivo left and right ventricles. ...
Three-dimensional residual strain in midanterior the strain and stress of both cardiac ventricles by using canine left ventricle. Am. J. ...
doi:10.1016/s1361-8415(03)00032-x
pmid:14561549
fatcat:qnqzurh5yjfmjmr7wll3ui3kzy
Page 204 of None Vol. 58, Issue 2
[page]
2005
None
Preserved Fulltext
The Internet Archive has digitized a microfilm copy of this work. It may be possible to borrow a copy for reading.
Phys Med Biol 45: 1611-1632, 2000
Denney TS Jr, Gerber BL, and Yan L. Unsupervised reconstruction of a three-dimensional left ventricular strain from parallel tagged cardiac images. ...
In summary, with the use of tagged MRI, MR-DTI, mea- sured LV pressures, and in vivo geometry, experimental vali- dation of FE models of LVA is far superior to anything done before. ...
Effects of using the unloaded configuration in predicting the in vivo diastolic properties of the heart
2016
Computer Methods in Biomechanics and Biomedical Engineering
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In the current study, in-vivo measurements were acquired using magnetic resonance images (MRI) and synchronous pressure catheterization in the LV (N=5). ...
To overcome this, a computational technique was adapted to determine the unloaded configuration of an in-vivo porcine left ventricle (LV). ...
Gorman), and by a grant from the National Science Foundation CMMI-1538754 (J. Wenk). ...
doi:10.1080/10255842.2016.1183122
pmid:27153460
pmcid:PMC5278778
fatcat:k6n3mper4jfqxonlrnbfmfzg24
Estimation of mechanical properties from gated SPECT and cine MRI data using a finite-element mechanical model of the left ventricle
2001
IEEE Transactions on Nuclear Science
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An ellipsoidal and a cylindrical model of the left ventricle were developed under both passive loading and active contraction. ...
Parameters that describe the material properties of the myocardium were estimated for the cylindrical model by fitting the radial motion described by the model to gated SPECT and cine MRI data. ...
ACKNOWLEDGMENT The authors would like to thank S. Webb for proofreading the manuscript. ...
doi:10.1109/23.940154
fatcat:alidzlzf7zct7jfcktvwhskbti
Left Ventricular Diastolic and Systolic Material Property Estimation from Image Data
[chapter]
2015
Lecture Notes in Computer Science
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The resulting end-diastolic and end-systolic geometry from the simulation were compared with measured image data. ...
In this paper, automated methods were used to determine passive material properties while simultaneously computing the unloaded reference geometry of the ventricles for stress analysis. ...
Acknowledgments The methods and simulations in this paper were performed using Continuity 6.4b (r8149). We would like to thank Jeff Van Dorn for providing us with technical support for the software. ...
doi:10.1007/978-3-319-14678-2_7
pmid:25729778
pmcid:PMC4339056
fatcat:hec7v7kxmzeqhkdcfp23s2xzaq
Material stiffness parameters as potential predictors of presence of left ventricle myocardial infarction: 3D echo-based computational modeling study
2016
BioMedical Engineering OnLine
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Ventricle material properties are difficult to obtain under in vivo conditions and are not readily available in the current literature. ...
A noninvasive echo-based modeling approach and a predictive method were introduced to determine left ventricle material parameters and differentiate patients with recent myocardial infarction (MI) from ...
Acknowledgements This research was supported in part by NIH-1R01-HL 089269 and in part by National Sciences Foundation of China 81571691, 81271589 and 11171030. ...
doi:10.1186/s12938-016-0151-8
pmid:27044441
pmcid:PMC4820947
fatcat:ewflxjmy7fhrzejx2sc6vk7nhy
A Framework for Evaluating Myocardial Stiffness Using 3D-Printed Hearts
[article]
2021
bioRxiv
pre-print
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However, in vivo validation of these estimates is exceedingly difficult due to the lack of a known ground-truth in vivo myocardial stiffness. ...
Ultimately, the setup is designed to enable extensive validation of MRI and FEM-based myocardial stiffness estimation frameworks. ...
Measuring in vivo passive myocardial stiffness requires a comprehensive evaluation of the mechanical behavior (stress-strain) in diastole. ...
doi:10.1101/2021.02.21.432169
fatcat:zzk2ubhhxrcohp6gji5vtbcq2e
Infarcted Left Ventricles Have Stiffer Material Properties and Lower Stiffness Variation: Three-Dimensional Echo-Based Modeling to Quantify In Vivo Ventricle Material Properties
2015
Journal of Biomechanical Engineering
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Our results indicated that our modeling approach has the potential to determine in vivo ventricle material properties, which in turn could lead to methods to infer presence of infarct from LV contractibility ...
Methods to quantify ventricle material properties noninvasively using in vivo data are of great important in clinical applications. ...
Acknowledgment This research was supported in part by NIH-1R01-HL 089269. Chun Yang's research was supported in part by National Sciences Foundation of China No. 11171030. ...
doi:10.1115/1.4030668
pmid:25994130
pmcid:PMC4462863
fatcat:kwrhq7o5srculbvltz2sngoegu
Strain Measurement in the Left Ventricle During Systole with Deformable Image Registration
[chapter]
2007
Lecture Notes in Computer Science
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images with strains measured from tagged MRI. ...
Both tagged and non-tagged cine MR images were obtained. The Hyperelastic Warping solution was evolved using a series of non-tagged images in ten intermediate phases from end-diastole to end-systole. ...
Acknowledgements Financial support from NIH #R01-EB000121 and NSF #BES-0134503 is gratefully acknowledged. ...
doi:10.1007/978-3-540-72907-5_4
fatcat:pgqhgvtp35gobfzlucsmjhh6hi
Strain measurement in the left ventricle during systole with deformable image registration
2009
Medical Image Analysis
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images with strains measured from tagged MRI. ...
Both tagged and non-tagged cine MR images were obtained. The Hyperelastic Warping solution was evolved using a series of non-tagged images in ten intermediate phases from end-diastole to end-systole. ...
Acknowledgements Financial support from NIH #R01-EB000121 and NSF #BES-0134503 is gratefully acknowledged. ...
doi:10.1016/j.media.2008.07.004
pmid:18948056
pmcid:PMC2873141
fatcat:wvepabjg6vci7p5lifurt42al4
Estimating passive mechanical properties in a myocardial infarction using MRI and finite element simulations
2014
Biomechanics and Modeling in Mechanobiology
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Specifically, properties will be determined by minimizing the difference between in-vivo strains and volume calculated from MRI and finite element model predicted strains and volume. ...
Myocardial infarction (MI) triggers a series of maladaptive events that lead to structural and functional changes in the left ventricle. ...
Acknowledgments This study was supported by National Institutes of Health grants R01 HL063954 (Gorman), R01 HL111090 (Burdick), and T32 HL007954 (Burdick), and by a grant from the American Heart Association ...
doi:10.1007/s10237-014-0627-z
pmid:25315521
pmcid:PMC4398581
fatcat:qiyppnasoreqhmg7nslygbpqse
A finite strain nonlinear human mitral valve model with fluid-structure interaction
2014
International Journal for Numerical Methods in Biomedical Engineering
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Wenk et al. [20] developed an FE model consisting of the left ventricle, mitral apparatus, and chordae tendineae from magnetic resonance (MR) images from a sheep. ...
Our results show good agreement, in terms of the flow rate and the closing and opening configurations, with measurements from in vivo magnetic resonance images. ...
M. was sponsored by a Chinese Scholarship Council studentship and fee waiver funding from the University of Glasgow. B. E. ...
doi:10.1002/cnm.2691
pmid:25319496
pmcid:PMC4278556
fatcat:thhsq3bmjnetlcupfixghsyy7q
Cardiac Strain Analysis Using Cine Magnetic Resonance Imaging and Computed Tomography
2018
Cardiovascular Imaging Asia
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Cardiac MRI lacks the disadvantages of acoustic windows and a narrow field of view, with the advantage of measuring right ventricular strain and the geometric difference in left ventricular contraction ...
Using tagged cine magnetic resonance imaging (MRI) to analyze myocardial strain provides direct information regarding the timing of onset and peak of myocardial contraction and allows for the evaluation ...
Acknowledgments This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (16K10321). We would like to thank Mr. Yuichiro Sano and Mrs. ...
doi:10.22468/cvia.2018.00052
fatcat:oc5xxakgszerrli3vw4lmus2ve
Magnetic resonance imaging assessment of myocardial elastic modulus and viscosity using displacement imaging and phase-contrast velocity mapping
2005
Magnetic Resonance in Medicine
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MRI-determined VDTCs were similar in the three regions (VDTC = −1.15 ± 12.37 versus 3.04 ± 7.25 versus 4.17 ± 5.76 ms, P = ns) and did not differ from lateral and septal wall strain gauge assessment (VDTC ...
in agreement with direct strain gauge measurements (3.78 ± 0.93 and 2.96 ± 0.88 kPa for the lateral wall and the septum, P = ns for both versus MRI). ...
Hiroshi Ashikaga and Elliot McVeigh of NHLBI/NIH for allowing us to scan their ischemic dog model and providing the Gd-DTPA contrast images. ...
doi:10.1002/mrm.20589
pmid:16086299
pmcid:PMC2886520
fatcat:7v5hrh2kv5aujh5aalpno33mhe
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