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Flow and peak velocity measurements in patients with aortic valve stenosis using phase contrast MR accelerated with k-t BLAST
Department of Medical Physics, Örebro University Hospital, Örebro, Sweden.ORCID iD: 0000-0002-8351-3367
Department of Clinical Physiology, Örebro University Hospital, Sweden.
Department of Clinical Physiology, Örebro University Hospital, Sweden.
Department of Radiology, Örebro University Hospital, Sweden.
2012 (English)In: European Journal of Radiology, ISSN 0720-048X, E-ISSN 1872-7727, Vol. 81, no 9, p. 2203-2207Article in journal (Refereed) Published
Abstract [en]

Objective: To investigate the accuracy of velocity measurements in patients with aortic valve stenosis using phase contrast (PC) imaging accelerated with SENSE (Sensitivity Encoding) and k-t BLAST (Broad-use Linear Acquisition Speed-up Technique).

Methods: Accelerated quantitative breath hold PC measurements, using SENSE and k-t BLAST, were performed in twelve patients whose aortic valve stenosis had been initially diagnosed using echocardiography. Stroke volume (SV) and peak velocity measurements were performed on each subject in three adjacent slices using both accelerating methods.

Results: The peak velocities measured with PC MRI using SENSE were -8.0±9.5% lower (p<0.01) compared to the peak velocities measured with k-t BLAST and the correlation was r=0.83. The stroke volumes when using SENSE were slightly higher 0.4±17.1 ml compared to the SV obtained using k-t BLAST but the difference was not significant (p>0.05).

Conclusions In this study higher peak velocities were measured in patients with aortic stenosis when combining k-t BLAST with PC MRI compared to PC MRI using SENSE. A probable explanation of this difference is the higher temporal resolution achieved in the k-t BLAST measurement. There was, however, no significant difference between calculated SV based on PC MRI using SENSE and k-t BLAST, respectively.

Place, publisher, year, edition, pages
Clare, Ireland: Elsevier, 2012. Vol. 81, no 9, p. 2203-2207
Keywords [en]
Aortic valve, stenosis, k-t BLAST, SENSE, phase contrast imaging
National Category
Radiology, Nuclear Medicine and Medical Imaging
Research subject
Radiology
Identifiers
URN: urn:nbn:se:oru:diva-27174DOI: 10.1016/j.ejrad.2011.06.034ISI: 000307670000046PubMedID: 21724348Scopus ID: 2-s2.0-84864692702OAI: oai:DiVA.org:oru-27174DiVA, id: diva2:601918
Note

Funding agency:

Research Committee of Örebro County Council 

Available from: 2013-01-30 Created: 2013-01-30 Last updated: 2018-05-10Bibliographically approved

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Thunberg, PerEmilsson, Kent

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