論文

査読有り
2017年

Influence of Spatial Resolution in Three-dimensional Cine Phase Contrast Magnetic Resonance Imaging on the Accuracy of Hemodynamic Analysis

MAGNETIC RESONANCE IN MEDICAL SCIENCES
  • Atsushi Fukuyama
  • ,
  • Haruo Isoda
  • ,
  • Kento Morita
  • ,
  • Marika Mori
  • ,
  • Tomoya Watanabe
  • ,
  • Kenta Ishiguro
  • ,
  • Yoshiaki Komori
  • ,
  • Takafumi Kosugi

16
4
開始ページ
311
終了ページ
316
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2463/mrms.mp.2016-0060
出版者・発行元
JPN SOC MAGNETIC RESONANCE MEDICINE

Introduction: We aim to elucidate the effect of spatial resolution of three-dimensional cine phase contrast magnetic resonance (3D cine PC MR) imaging on the accuracy of the blood flow analysis, and examine the optimal setting for spatial resolution using flow phantoms.
Materials and Methods: The flow phantom has five types of acrylic pipes that represent human blood vessels (inner diameters: 15, 12, 9, 6, and 3 mm). The pipes were fixed with 1% agarose containing 0.025 mol/L gadolinium contrast agent. A blood-mimicking fluid with human blood property values was circulated through the pipes at a steady flow. Magnetic resonance (MR) images (three-directional phase images with speed information and magnitude images for information of shape) were acquired using the 3-Tesla MR system and receiving coil. Temporal changes in spatially-averaged velocity and maximum velocity were calculated using hemodynamic analysis software. We calculated the error rates of the flow velocities based on the volume flow rates measured with a flowmeter and examined measurement accuracy.
Results: When the acrylic pipe was the size of the thoracicoabdominal or cervical artery and the ratio of pixel size for the pipe was set at 30% or lower, spatially-averaged velocity measurements were highly accurate. When the pixel size ratio was set at 10% or lower, maximum velocity could be measured with high accuracy. It was difficult to accurately measure maximum velocity of the 3-mm pipe, which was the size of an intracranial major artery, but the error for spatially-averaged velocity was 20% or less.
Conclusions: Flow velocity measurement accuracy of 3D cine PC MR imaging for pipes with inner sizes equivalent to vessels in the cervical and thoracicoabdominal arteries is good. The flow velocity accuracy for the pipe with a 3-mm-diameter that is equivalent to major intracranial arteries is poor for maximum velocity, but it is relatively good for spatially-averaged velocity.

Web of Science ® 被引用回数 : 4

リンク情報
DOI
https://doi.org/10.2463/mrms.mp.2016-0060
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28132996
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000414051100007&DestApp=WOS_CPL

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