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Non-identifiability of the Rayleigh damping material model in Magnetic Resonance Elastography
2013
Mathematical Biosciences
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Magnetic Resonance Elastography (MRE) is an emerging imaging modality for quantifying soft tissue elasticity deduced from displacement measurements within the tissue obtained by phase sensitive Magnetic ...
Overall, the RD model estimates the real shear shear modulus (µ R ) well, but identifying damping parameters (µ I and ρ I ) is not possible without an alternative approach. ...
The authors would like to acknowledge Matthew McGarry from Dartmouth College of Engineering for help in data collection and Dr Elijah Van Houten from for providing valuable expertise in MRE. ...
doi:10.1016/j.mbs.2013.08.012
pmid:24018294
fatcat:y25bxwrgavdjli6o2cmu7bt3fy
Magnetic resonance elastography (MRE) of the human brain: technique, findings and clinical applications
2016
Physics in Medicine and Biology
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aspects of MRE, and Victoria McCulloch for providing the illustration of the Resoundant and head-pillow, as shown in figure 2(a) . ...
LH is funded through a grant to the University of Edinburgh from Alzheimer Scotland. ...
Nevertheless, elastography with MRI, known as magnetic resonance elastography (MRE), has a distinct advantage over ultrasonic methods as it benefits from being both non-invasive, and capable of generating ...
doi:10.1088/0031-9155/61/24/r401
pmid:27845941
fatcat:ryhakufwwfeqfpvuk3himgau7a
A novel breast software phantom for biomechanical modeling of elastography
2012
Medical Physics (Lancaster)
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The authors demonstrate a typical elastography experiment of applying a static stress to the top surface of the breast just above a simulated tumor and calculate normal strains in 3D and in 2D with plane ...
Thus, the use of 3D phantoms, like the breast phantom, with no approximations, will assist in more accurate estimation of modulus, especially valuable for 3D elastography systems. ...
Reprinted by permission of IEEE; Fig 5(c), Shih et. al., Computational simulation of breast compression based on segmented breast and fibroglandular tissues on magnetic resonance images, Physics in Medicine ...
doi:10.1118/1.3690467
pmid:22482599
fatcat:mt56kv5zqbb4xa3chbcufks3da
Viscoelasticity Imaging of Biological Tissues and Single Cells Using Shear Wave Propagation
2021
Frontiers in Physics
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Then, approaches for theoretical modeling and tracking of shear waves are detailed. Following it, some examples of applications to characterize the viscoelasticity of various organs are given. ...
Finally, current limitations and future directions in shear wave elastography are presented. ...
Subzone Based Magnetic Resonance Elastography Using a Rayleigh Damped Material Model. ...
doi:10.3389/fphy.2021.666192
fatcat:qvn4pciaxbdbfhynp4spzszrii
Simulation and analysis of magnetic resonance elastography wave images using coupled harmonic oscillators and Gaussian local frequency estimation
2001
Magnetic Resonance Imaging
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New methods for simulating and analyzing Magnetic Resonance Elastography (MRE) images are introduced. ...
To simulate a twodimensional shear wave pattern, the wave equation is solved for a field of coupled harmonic oscillators with spatially varying coupling and damping coefficients in the presence of an external ...
Dynamic magnetic resonance elastography (MRE) offers one of the most promising techniques for in-vivo elasticity measurements [8, 12] . ...
doi:10.1016/s0730-725x(01)00387-3
pmid:11672629
fatcat:yvhmrzvtnfe57o7tpva4hbmxvq
Photoacoustic elastography imaging: a review
2019
Journal of Biomedical Optics
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Elastography imaging is a promising tool-in both research and clinical settings-for diagnosis, staging, and therapeutic treatments of various life-threatening diseases (including brain tumors, breast cancers ...
Large variation in the physical (elastic) properties of tissue, from normal to diseased stages, enables highly sensitive characterization of pathophysiological states of the diseases. ...
; MRE, magnetic resonance elastography; SCE, speckle contrast elastography. ...
doi:10.1117/1.jbo.24.4.040902
pmid:31041859
pmcid:PMC6990059
fatcat:dt6t7iflrrfp3g6bqavnapquai
Multimodal Ultrasonic Imaging for Breast Cancer Detection
2012
Archives of Acoustics
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In spite of their advantages, these factors have precluded the use of ultrasound for screening. This work approaches the ultrasound-based early detection of breast cancer with a different concept. ...
Nothacker M., Duda V., Hahn M., Warm M., Degenhardt F., Madjar H., Weinbrenner S., Albert U.S. (2009), Early detection of breast cancer: benefits and risks of supplemental breast ultrasound in asymptomatic ...
The material of this article has been orally presented at the 59th International Conference of the Polish Acoustical Society, OSA 2012, in PL-Boszkowo. ...
doi:10.2478/v10168-012-0033-4
fatcat:fhhbdferdfaqxcbedyoljfvtxi
Review of MR elastography applications and recent developments
2012
Journal of Magnetic Resonance Imaging
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The technique of MR elastography (MRE) has emerged as a useful modality for quantitatively imaging the mechanical properties of soft tissues in vivo. ...
These applications include measuring tissue changes associated with diseases of the liver, breast, brain, heart, and skeletal muscle including both focal lesions (e.g., hepatic, breast, and brain tumors ...
Subzone based magnetic resonance elastography using a Rayleigh damped material model. Medical Physics. 2011; 38:1993-2004. [PubMed: 21626932] 36. Oestreicher HL. ...
doi:10.1002/jmri.23597
pmid:22987755
pmcid:PMC3462370
fatcat:qamkueiqzvcwbfjzxikrr2cbxm
Seventh International Conference
2005
Bereavement Care
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Li, "Elastography: a quantitative method for imaging the Acknowledgements: This study was partially supported by the French National Department of Research and Education. ...
Acknowledgements: We are grateful for the support from the NIH (R01-CA100373), and to colleagues at the Mayo Clinic in Rochester, MN and the Charing Cross Hospital in London, UK for providing some of the ...
Menstrual-cycle dependence of breast parenchyma elasticity: Estimation with magnetic resonance elastography of breast tissue during the menstrual cycle. ...
doi:10.1080/02682620508657640
fatcat:hwoqd64zz5b6bkhpyteeazib5u
An overlapping subzone technique for MR-based elastic property reconstruction
1999
Magnetic Resonance in Medicine
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A finite element-based nonlinear inversion scheme for magnetic resonance (MR) elastography is detailed. ...
In both cases the process has proved successful and has been capable of discerning small inclusions near 4 mm in dia- meter. Magn Reson Med 42:779-786, 1999. 1999 Wiley-Liss, Inc. ...
Ultrasound's inherent lack of lateral resolution and limited axial resolution when compared with other clinically available imaging modalities has motivated the development of magnetic resonance (MR) elastography ...
doi:10.1002/(sici)1522-2594(199910)42:4<779::aid-mrm21>3.0.co;2-z
pmid:10502768
fatcat:vowlyk6sxnf7vg2ya7kapebodu
A stochastic filtering approach to recover strain images from quasi-static ultrasound elastography
2014
BioMedical Engineering OnLine
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Methods: In this paper, we explore the usage of Kalman filtering algorithm for the estimation of strain imaging in quasi-static ultrasound elastography. ...
Results: The accuracy and robustness of our proposed framework is first evaluated in synthetic data in controlled conditions, and the performance of this framework is then evaluated in the real data collected ...
Similar elastography techniques have been also developed using magnetic resonance imaging [2] [3] [4] and mammographic imaging [5] . ...
doi:10.1186/1475-925x-13-15
pmid:24521481
pmcid:PMC3925777
fatcat:aj7m6d4zxzbefknrmpcoeao2me
Monitoring Tissue Engineering Using Magnetic Resonance Imaging
2008
Journal of Bioscience and Bioengineering
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Magnetic resonance imaging (MRI) largely overcomes these restrictions, exhibits high resolution (approximately 100 μm) and can be applied both in vitro and in vivo. ...
First, we briefly describe the underlying principles of MRI and the expected changes in relaxation times (T 1 , T 2 ) and the water diffusion coefficient that are the basis for MR contrast in developing ...
Acknowledgments - The authors wish to thank the following colleagues for their assistance in preparing this paper: Dr. ...
doi:10.1263/jbb.106.515
pmid:19134545
fatcat:5gkzbcsxrng7jeia42avvqjk4e
Optical coherence elastography: current status and future applications
2011
Journal of Biomedical Optics
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21 can reach 30-70 μm and magnetic resonance microscopy 22 has improved imaging resolution to ∼120 um. ...
γ 0 are the spring constant and the damping parameter for the mechanical wave driver, respectively; k and γ are the spring constant and the coefficient of viscosity of the samples, and m denotes the mass ...
doi:10.1117/1.3560294
pmid:21529067
fatcat:e44h5sxpy5bbrdgunqd7jh6t5a
Reconstruction of elasticity: a stochastic model-based approach in ultrasound elastography
2013
BioMedical Engineering OnLine
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Methods: In this study we propose a reconstruction strategy to recover the mechanical properties of the tissue. ...
evaluated in the real data collected from elastography phantom and patients using the ultrasound system. ...
In Rayleigh damping α is the mass proportional Rayleigh damping coefficient and β is the stiffness proportional Rayleigh damping coefficient [44] . ...
doi:10.1186/1475-925x-12-79
pmid:23937814
pmcid:PMC3751923
fatcat:s7dzdwkn4ffdhjrc6hlgk3yuai
Two-dimensional MR elastography with linear inversion reconstruction: methodology and noise analysis
2000
Physics in Medicine and Biology
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A methodology for imposing approximate plane strain conditions in magnetic resonance elastography through physical constraint is described. ...
Experimentally measured data are reconstructed to illustrate the performance of the method. † ...
Acknowledgments The authors gratefully acknowledge the support of the Terry Fox Foundation (programme project grant 006886) and the US Army (DAMD 17-99-1-9391). ...
doi:10.1088/0031-9155/45/8/302
pmid:10958181
fatcat:piia53jrqjhtlbliuzzljg4pga
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