作者
Elizabeth J Nett, Kevin M Johnson, Alex Frydrychowicz, Alejandro Munoz Del Rio, Eric Schrauben, Christopher J Francois, Oliver Wieben
发表日期
2012/6
期刊
Journal of Magnetic Resonance Imaging
卷号
35
期号
6
页码范围
1462-1471
出版商
Wiley Subscription Services, Inc., A Wiley Company
简介
Purpose
To validate a novel approach for accelerated four‐dimensional phase contrast MR imaging (4D PC‐MRI) with an extended range of velocity sensitivity.
Materials and Methods
4D PC‐MRI data were acquired with a radially undersampled trajectory (PC‐VIPR). A dual Venc (dVenc) processing algorithm was implemented to investigate the potential for scan time savings while providing an improved velocity‐to‐noise ratio. Flow and velocity measurements were compared with a flow pump, conventional 2D PC MR, and single Venc 4D PC‐MRI in the chest of 10 volunteers.
Results
Phantom measurements showed excellent agreement between accelerated dVenc 4D PC‐MRI and the pump flow rate (R2 ≥ 0.97) with a three‐fold increase in measured velocity‐to‐noise ratio (VNR) and a 5% increase in scan time. In volunteers, reasonable agreement was found when combining 100% of data acquired with V …
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EJ Nett, KM Johnson, A Frydrychowicz, AM Del Rio… - Journal of Magnetic Resonance Imaging, 2012