Image-based carotid flow reconstruction: a comparison between MRI and ultrasound
| Autor: | Alun D. Hughes, Fadi Glor, David N. Firmin, Pascal Verdonck, S. A. McG. Thom, Xiao Yun Xu, Dean C. Barratt, Lindsey A. Crowe, Ben Ariff |
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| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Materials science Physiology Biomedical Engineering Biophysics Pulsatile flow Echocardiography Three-Dimensional Hemodynamics Information Storage and Retrieval Sensitivity and Specificity Physiology (medical) Image Interpretation Computer-Assisted medicine Shear stress Humans 3D ultrasound Computer Simulation Reproducibility medicine.diagnostic_test business.industry Ultrasound Models Cardiovascular Reproducibility of Results Magnetic resonance imaging Blood flow Middle Aged Magnetic Resonance Imaging Carotid Arteries Female business Algorithms Blood Flow Velocity Biomedical engineering |
| Zdroj: | Physiological measurement. 25(6) |
| ISSN: | 0967-3334 |
| Popis: | Atherosclerosis is a major cause of morbidity and mortality. Its apparent link with wall shear stress (WSS) has led to considerable interest in the in vivo estimation of WSS. Determining WSS by combining medical images with computational fluid dynamics (CFD) simulations can be performed both with magnetic resonance imaging (MRI) and three-dimensional ultrasound (3DUS). This study compares predicted 3D flow patterns based on black blood MRI and 3DUS. Velocity fields in the carotid arteries of nine subjects have been reconstructed, and the haemodynamic wall parameters WSS, oscillatory shear index (OSI), WSS gradients (WSSG) and angle gradients (WSSAG) were compared between the two imaging techniques. There was a good qualitative agreement between results derived from MRI and 3DUS (average correlation strength above 0.60). The root mean square error between haemodynamic wall parameters was comparable to the range of the expected variability of each imaging technique (WSS: 0.411 N m(-2); OSI: 0.048; temporal WSSG: 150 N s(-1) m(-2); spatial WSSG: 2.29 N m(-3); WSSAG: 87.6 rad m(-1)). In conclusion, MRI and 3DUS are capable of providing haemodynamic parameters when combined with CFD, and the predictions are in most cases qualitatively and quantitatively similar. The relatively high cost of MRI and continuing improvement in ultrasound favour US to MRI for future haemodynamic studies of superficial arteries. |
| Databáze: | OpenAIRE |
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