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  Carotid artery flow as determined by real-time phase-contrast flow MRI and neurovascular ultrasound: A comparative study of healthy subjects.

Maier, I. L., Hofer, S., Joseph, A. A., Merboldt, K. D., Tan, Z., Schregel, K., et al. (2018). Carotid artery flow as determined by real-time phase-contrast flow MRI and neurovascular ultrasound: A comparative study of healthy subjects. European Journal of Radiology, 106, 38-45. doi:10.1016/j.ejrad.2018.07.011.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-0101-B Version Permalink: http://hdl.handle.net/21.11116/0000-0003-9159-5
Genre: Journal Article

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 Creators:
Maier, I. L., Author
Hofer, S.1, Author              
Joseph, A. A.1, Author              
Merboldt, K. D.1, Author              
Tan, Z.1, Author              
Schregel, K., Author
Knauth, M., Author
Bähr, M., Author
Psychogios, M. N., Author
Liman, J., Author
Frahm, J.1, Author              
Affiliations:
1Biomedical NMR Research GmbH, MPI for biophysical chemistry, Max Planck Society, ou_578634              

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Free keywords: Carotid artery; Doppler sonography; Duplex sonography; Neurovascular ultrasound; Real-time flow MRI; Velocity profiles
 Abstract: The assessment of carotid artery flow by neurovascular ultrasound (nvUS) can be complemented by real-time phase-contrast (RT-PC) flow MRI which apart from quantitative flow parameters offers velocity distributions across the entire vessel lumen. MATERIALS AND METHODS: The feasibility and diagnostic potential of RT-PC flow MRI was evaluated in 20 healthy volunteers in comparison to conventional nvUS. RT-PC flow MRI at 40 ms temporal resolution and 0.8 mm in-plane resolution resulted in velocity maps with low phase noise and high spatiotemporal accuracy by exploiting respective advances of a recent nonlinear inverse model-based reconstruction. Peak-systolic velocities (PSV), end-diastolic velocities (EDV), flow volumes and comprehensive velocity profiles were determined in the common, internal and external carotid artery on both sides. RESULTS: Flow characteristics such as pulsatility and individual abnormalities shown on nvUS could be reproduced and visualized in detail by RT-PC flow MRI. PSV to EDV differences revealed good agreement between both techniques, mean PSV and EDV were significantly lower and flow volumes were higher for MRI. CONCLUSION: Our findings suggest that RT-PC flow MRI adds to clinical diagnostics, e.g. by alterations of dynamic velocity distributions in patients with carotid stenosis. Lower PSV and EDV values than for nvUS mainly reflect the longer MRI acquisition time which attenuates short peak velocities, while higher flow volumes benefit from a proper assessment of the true vessel lumen.

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Language(s): eng - English
 Dates: 2018-07-182018-09
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.ejrad.2018.07.011
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Title: European Journal of Radiology
Source Genre: Journal
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Pages: - Volume / Issue: 106 Sequence Number: - Start / End Page: 38 - 45 Identifier: -