Flow and peak velocity measurements in patients with aortic valve stenosis using phase contrast MR accelerated with k-t BLAST

Thunberg, Per, 1968- (author): Department of Medical Physics, Örebro University Hospital, Örebro, Sweden

Emilsson, Kent, 1963- (author): Department of Clinical Physiology, Örebro University Hospital, Örebro, Sweden

Rask, Peter (author): Department of Clinical Physiology, Örebro University Hospital, Örebro, Sweden

Kähäri, Anders (author): Department of Radiology, Örebro University Hospital, Örebro, Sweden

(creator_code:org_t)

Clare, Ireland : Elsevier, 2012
2012
English.
In: European Journal of Radiology. - Clare, Ireland : Elsevier. - 0720-048X .- 1872-7727. ; 81:9, s. 2203-2207

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

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.

By the author/editor: Thunberg, Per, 1 ...; Emilsson, Kent, ...; Rask, Peter; Kähäri, Anders

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Radiology Nuclea ...

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