Cardiac Cine Parallel Imaging on a 0.7T Open System

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Background: Parallel imaging can be applied to cardiac imaging with a cylindrical MRI (magnetic resonance imaging) apparatus. Studies of open MRI, however, are few. This study sought to achieve cardiac cine parallel imaging (or RAPID, for "rapid acquisition through parallel imaging design") with an open 0.7T MRI apparatus.<br> Materials and Methods: Imaging time was shortened in all slice directions with the use of a dedicated four-channel RF receiving coil comprising solenoid coils and butterfly coils. Coil shape was designed through an RF-coil simulation that considered biological load. The auto-calibration of a 0.7T open MRI apparatus incorporated a modified image-domain reconstruction algorithm. Cine images were obtained with a BASG, or balanced SARGE (steady-state acquisition with rewound gradient echo), sequence. Image quality was evaluated with cylindrical phantoms and five healthy volunteers.<br> Results: Multi-slice phantom images showed no visible artifacts. Cine images taken under breath-hold with an acceleration factor of two were evaluated carefully. With auto-calibration, the images revealed no visible unfolded artifacts or motion artifacts. RAPID thus improved the acquisition speed, time resolution, and spatial resolution of short-axis, long-axis, and four-chamber images.<br> Conclusion: The use of a dedicated RF coil enabled cardiac cine RAPID to be performed with an open MRI apparatus.<br>

収録刊行物

  • Magnetic resonance in medical sciences : MRMS

    Magnetic resonance in medical sciences : MRMS 3(1), 45-49, 2004-04-01

    Japanese Society for Magnetic Resonance in Medicine

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各種コード

  • NII論文ID(NAID)
    10013101325
  • NII書誌ID(NCID)
    AA11648770
  • 本文言語コード
    ENG
  • 資料種別
    NOT
  • ISSN
    13473182
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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