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Computer-assisted Analysis of Three-dimensional MR Angiograms
2002
Radiographics
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The software tools required for postprocessing of magnetic resonance (MR) angiograms include the following functions: data handling, image visualization, and vascular analysis. ...
The quantification is performed in three steps: extraction of the vessel centerline, detection of vessel boundaries in planes locally orthogonal to the centerline, and calculation of stenosis parameters ...
Acknowledgments: We thank Alfred Anwander for his help in implementing the algorithm for vessel contour extraction, Bruno Marchand for providing the phantom data sets, and Leonardo Florez for his great ...
doi:10.1148/radiographics.22.2.g02mr03421
pmid:11896231
fatcat:qbvaq3oufrapfepkktvwq4mwjy
Ultra-high resolution, 3-dimensional magnetic resonance imaging of the atherosclerotic vessel wall at clinical 7T
2020
PLoS ONE
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In conclusion, we successfully developed 3D, black-blood, ultra-high spatial resolution vessel wall MRI protocols on a 7T clinical scanner. 7T imaging was in general superior to 3T with respect to image ...
Accurate quantification and characterization of atherosclerotic plaques with MRI requires high spatial resolution acquisitions with excellent image quality. ...
Acknowledgments The authors would like to thank Chang Ho Wessel and Samantha Baxter.
Author Contributions ...
doi:10.1371/journal.pone.0241779
pmid:33315867
fatcat:xkl5hz7kfvglpfqbcjaaralmom
Automated Artery Localization and Vessel Wall Segmentation using Tracklet Refinement and Polar Conversion
2020
IEEE Access
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Image patches were extracted from the centerlines and converted in a polar coordinate system for vessel wall segmentation. ...
The segmentation method used 3D polar information and overcame problems such as contour discontinuity, complex vessel geometry, and interference from neighboring vessels. ...
Semiautomated or automated methods have been proposed to segment vessel walls, such as using active contour models by Yuan et al. [9] and Adams et al. ...
doi:10.1109/access.2020.3040616
pmid:33777593
pmcid:PMC7996631
fatcat:upuhmkf7fbeibjoc5yyotz5p6e
Quantifying errors in flow measurement using phase contrast magnetic resonance imaging: comparison of several boundary detection methods
2015
Magnetic Resonance Imaging
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These simplified expressions were then used to numerically simulate the effect of segmentation accuracy and provide some criteria that if met, would keep errors in flow quantification below 10% or 5%. ...
These sources of errors are well understood and mathematical expressions have been derived for them in previous work. ...
ACKNOWLEDGMENTS Research reported in this publication was supported by the National Heart, Lung, And Blood Institute of the National Institutes of Health under Award Number R42HL112580. ...
doi:10.1016/j.mri.2014.10.009
pmid:25460329
pmcid:PMC4293330
fatcat:5y2wtxefqzft3krshxhiskaueq
Endothelial Shear Stress: A Critical Determinant of Arterial Remodeling and Arterial Stiffness in Humans--A Carotid 3.0-T MRI Study
2010
Circulation Cardiovascular Imaging
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[b], Ϫ0.19 mm 2 per N/m 2 ; Pϭ0.02), lumen area (b, Ϫ15.5 mm 2 per N/m 2 ; PϽ0.001), and vessel size (b, Ϫ24.0 mm 2 per N/m 2 ; PϽ0.001). ...
Multiple linear regression analysis accounting for age and blood pressure revealed that ESS was an independent predictor of the following response variables: carotid wall thickness (regression coefficient ...
Acknowledgments We thank A.M. van den Berg and H. Afzali for assisting in data acquisition and analysis and A.H. Zwinderman, PhD, for assisting with statistical analysis.
Disclosures None. ...
doi:10.1161/circimaging.109.916304
pmid:20576811
fatcat:dc7l543xobd7xnyo6owbi6f3i4
Assessment of Carotid Plaque Vulnerability Using Structural and Geometrical Determinants
2008
Circulation Journal
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Methods and Results Using a finite element method, structural analysis was performed using models derived from in vivo high-resolution magnetic resonance imaging (MRI) of carotid atheroma in 40 non-consecutive ...
tensile stress in the lesion may play an important role in plaque rupture and myocardial infarction. 17 Tang et al used an ex vivo magnetic resonance imaging (MRI)-based flow-structure interaction model ...
Acknowledgments We gratefully acknowledge the support of The Stroke Association and GlaxoSmithKline. We thank Mr Tim Baynes, Specialist Research Nurse at Addenbrooke's Hospital, for his support. ...
doi:10.1253/circj.72.1092
pmid:18577817
fatcat:agljrx2cwvcsrmx445mbjqbvri
Segmentation of Soft atherosclerotic plaques using active contour models
[article]
2016
arXiv
pre-print
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Consequently based on detected seed point & intensity behaviour, localized active contour segmentation has been applied to extract complete coronary tree. ...
This similarity in intensity makes the isolation and detection of soft plaques very difficult. This work aims to develop framework for segmentation of vulnerable plaques with minimal user dependency. ...
A substitute for non-invasive imaging of vasculature is magnetic resonance angiography (MRA) but due to less spatial resolution (high slice thickness) this modality is for recording larger vessels only ...
arXiv:1608.00116v1
fatcat:5h6n3ervbze47b6oiit66ro4qq
Review of Journal of Cardiovascular Magnetic Resonance 2015
2016
Journal of Cardiovascular Magnetic Resonance
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There were 116 articles published in the Journal of Cardiovascular Magnetic Resonance (JCMR) in 2015, which is a 14% increase on the 102 articles published in 2014. ...
The 2015 JCMR Impact Factor (which is published in June 2016) rose to 5.75 from 4.72 for 2014 (as published in June 2015) , which is the highest impact factor ever recorded for JCMR. ...
Consent for publication Not applicable. Ethics approval and consent to participate Not applicable. Supporting data Not applicable. ...
doi:10.1186/s12968-016-0305-7
pmid:27846914
pmcid:PMC5111217
fatcat:xpe47w5atvcilebmccg4ut7xgm
Imaging biomarkers of cardiovascular disease
2010
Journal of Magnetic Resonance Imaging
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In addition, the accuracy of in vivo MRI has been validated against histology with high reproducibility, thus paving the way for application to epidemiological studies of disease pathogenesis and, by serial ...
The application of plaque MRI in clinical trials as well as emerging imaging techniques used to evaluate plaque compositional features and biological activities are also discussed. ...
Ferguson and Zach Miller for their assistances in editing the manuscript. Grant Support: This work is partly supported by grant NIH HL56874, NIH HL076378 ...
doi:10.1002/jmri.22266
pmid:20815049
pmcid:PMC2935309
fatcat:firsa4dgnrc67ckv2g7a4lnvu4
A Survey of Cardiac 4D PC-MRI Data Processing
[article]
2015
Eurographics Workshop on Visual Computing for Biomedicine
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Processing the data comprises complex image processing methods as well as flow analysis and visualization. In this work, we mainly focus on the aorta. ...
A dataset contains time-resolved, three-dimensional blood flow directions and strengths, facilitating comprehensive qualitative and quantitative data analysis. ...
Acknowledgements We would like to thank Anja Hennemuth (Fraunhofer MEVIS) for valuable feedback. ...
doi:10.2312/vcbm.20151217
dblp:conf/vcbm/KohlerBPPP15
fatcat:ashxa76onnaaxcj3eibmwms3ae
Patient-Specific Modeling of Cardiovascular Mechanics
2009
Annual Review of Biomedical Engineering
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We review methods to create anatomic and physiologic models, obtain properties, assign boundary conditions, and solve the equations governing blood flow and vessel wall dynamics. ...
Advances in numerical methods and three-dimensional imaging techniques have enabled the quantification of cardiovascular mechanics in subjectspecific anatomic and physiologic models. ...
ACKNOWLEDGMENTS This review was supported, in part, by grants from the National Science Foundation (ITR-0205741) and the National Institutes of Health (U54 GM072970). We also acknowledge expert ...
doi:10.1146/annurev.bioeng.10.061807.160521
pmid:19400706
pmcid:PMC4581431
fatcat:hyc2p2gvwffx5m2egsvausrsla
Comprehensive Modeling and Visualization of Cardiac Anatomy and Physiology from CT Imaging and Computer Simulations
2017
IEEE Transactions on Visualization and Computer Graphics
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, and coronary arteries; (2) Function from CT imaging: motion modeling, strain calculation, and visualization of four heart chambers; (3) Physiology from CT imaging: quantification and visualization of ...
In clinical cardiology, both anatomy and physiology are needed to diagnose cardiac pathologies. CT imaging and computer simulations provide valuable and complementary data for this purpose. ...
This work was supported in part by NIH grants #7R01HL111141, #1R01HL118019 and #UL1TR000457.
Haoyin ...
doi:10.1109/tvcg.2016.2520946
pmid:26863663
pmcid:PMC4975682
fatcat:ced2xczizfhhrhdzmedcwbhfuy
Evaluation of 3D blood flow patterns and wall shear stress in the normal and dilated thoracic aorta using flow-sensitive 4D CMR
2012
Journal of Cardiovascular Magnetic Resonance
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The purpose of this study was to investigate 3D flow patterns and vessel wall parameters in patients with dilated ascending aorta, age-matched subjects, and healthy volunteers. ...
Blood flow velocities, regional wall shear stress (WSS), and oscillatory shear index (OSI) were quantified. ...
Figure 1 1 Position of the planes for particle trace visualization (1, 3 and 6) and blood flow/ vessel wall quantification (1) (2) (3) (4) (5) (6) (7) (8) in the thoracic aorta. ...
doi:10.1186/1532-429x-14-84
pmid:23237187
pmcid:PMC3534249
fatcat:sfnzjfpzubbu5ecgcrhh6oaapm
System identification theory in myocardial perfusion modeling of dynamic contrast-enhanced MRI
2009
Journal of Cardiovascular Magnetic Resonance
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Contrast enhanced cardiovascular magnetic resonance imaging (ceCMR) can detect and quantify myocardial fibrosis in the setting of CMI and might therefore be a valuable tool for a more accurate risk stratification ...
The use of ICDs in this large patient population is still limited by high costs and possible adverse events including inappropriate discharges and progression of heart failure. ...
Conclusion: We have developed and technically validated an automatic delineation algorithm for multi-echo CMR images. The resulting contours are accurate and allow for accurate T2* quantification. ...
doi:10.1186/1532-429x-11-s1-p277
fatcat:meh4u2os2jgczmnzqr5xebzjna
Location, patterns, and quantification of myocardial fibrosis identified by cardiac magnetic resonance delayed enhancement late after fontan operation
2009
Journal of Cardiovascular Magnetic Resonance
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Contrast enhanced cardiovascular magnetic resonance imaging (ceCMR) can detect and quantify myocardial fibrosis in the setting of CMI and might therefore be a valuable tool for a more accurate risk stratification ...
The use of ICDs in this large patient population is still limited by high costs and possible adverse events including inappropriate discharges and progression of heart failure. ...
Conclusion: We have developed and technically validated an automatic delineation algorithm for multi-echo CMR images. The resulting contours are accurate and allow for accurate T2* quantification. ...
doi:10.1186/1532-429x-11-s1-o50
fatcat:j6nrfdgr2fbara66keowypfuhe
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