頸動脈プラーク性状評価におけるk-space充填法 (Radial Scan)撮像条件の検討

DOI Web Site PubMed 参考文献30件
  • 中村 麻名美
    Central Division of Radiology, Hakodate Municipal Hospital Graduate School of Health Sciences, Hokkaido University
  • 真壁 武司
    Central Division of Radiology, Hakodate Municipal Hospital
  • 手塚 秀臣
    Central Division of Radiology, Hakodate Municipal Hospital
  • 三浦 喬弘
    Central Division of Radiology, Hakodate Municipal Hospital
  • 梅村 琢磨
    Central Division of Radiology, Hakodate Municipal Hospital
  • 杉森 博行
    Graduate School of Health Sciences, Hokkaido University Department of Radiological Technology, Hokkaido University Hospital
  • 坂田 元道
    Graduate School of Health Sciences, Hokkaido University

書誌事項

タイトル別名
  • Optimal Scan Parameters for a Method of k-space Trajectory (Radial Scan Method) in Evaluation of Carotid Plaque Characteristics
  • 臨床技術 頸動脈プラーク性状評価におけるk-space充填法(Radial Scan)撮像条件の検討
  • リンショウ ギジュツ ケイドウミャク プラーク セイジョウ ヒョウカ ニ オケル k-space ジュウテンホウ(Radial Scan)サツゾウ ジョウケン ノ ケントウ

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The purpose of this study was to optimize scan parameters for evaluation of carotid plaque characteristics by k-space trajectory (radial scan method), using a custom-made carotid plaque phantom. The phantom was composed of simulated sternocleidomastoid muscle and four types of carotid plaque. The effect of chemical shift artifact was compared using T1 weighted images (T1WI) of the phantom obtained with and without fat suppression, and using two types of k-space trajectory (the radial scan method and the Cartesian method). The ratio of signal intensity of simulated sternocleidomastoid muscle to the signal intensity of hematoma, blood (including heparin), lard, and mayonnaise was compared among various repetition times (TR) using T1WI and T2 weighted imaging (T2WI). In terms of chemical shift artifacts, image quality was improved using fat suppression for both the radial scan and Cartesian methods. In terms of signal ratio, the highest values were obtained for the radial scan method with TR of 500 ms for T1WI, and TR of 3000 ms for T2WI. For evaluation of carotid plaque characteristics using the radial scan method, chemical shift artifacts were reduced with fat suppression. Signal ratio was improved by optimizing the TR settings for T1WI and T2WI. These results suggest the potential for using magnetic resonance imaging for detailed evaluation of carotid plaque.

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