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首页> 外文期刊>Magnetic Resonance in Medicine >Diffusion tensor echo planar imaging using surface coil transceiver with a semiadiabatic RF pulse sequence at 14.1T
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Diffusion tensor echo planar imaging using surface coil transceiver with a semiadiabatic RF pulse sequence at 14.1T

机译：使用具有14.1T半绝热RF脉冲序列的表面线圈收发器进行扩散张量回波平面成像

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摘要

Diffusion magnetic resonance studies of the brain are typically performed using volume coils. Although in human brain this leads to a near optimal filling factor, studies of rodent brain must contend with the fact that only a fraction of the head volume can be ascribed to the brain. The use of surface coil as transceiver increases Signal-to-Noise Ratio (SNR), reduces radiofrequency power requirements and opens the possibility of parallel transmit schemes, likely to allow efficient acquisition schemes, of critical importance for reducing the long scan times implicated in diffusion tensor imaging. This study demonstrates the implementation of a semiadiabatic echo planar imaging sequence (echo time = 40 ms, four interleaves) at 14.1T using a quadrature surface coil as transceiver. It resulted in artifact free images with excellent SNR throughout the brain. Diffusion tensor derived parameters obtained within the rat brain were in excellent agreement with reported values. Magn Reson Med, 2011. © 2010 Wiley-Liss, Inc.
机译：通常使用体积线圈对大脑进行扩散磁共振研究。尽管在人脑中这会导致接近最佳的填充因子，但对啮齿动物脑的研究必须与以下事实相抗衡：只有一部分头部体积可以归因于大脑。使用表面线圈作为收发器可提高信噪比（SNR），降低射频功率要求并开启了并行传输方案的可能性，该并行传输方案可能允许有效的采集方案，这对于减少与扩散相关的长扫描时间至关重要张量成像。这项研究演示了使用正交表面线圈作为收发器在14.1T下实现半绝热回波平面成像序列（回波时间= 40 ms，四个交错）。它产生了无伪影的图像，在整个大脑中具有出色的SNR。在大鼠脑内获得的由扩散张量得出的参数与报道的值非常一致。 Magn Reson Med，2011年。©2010 Wiley-Liss，Inc.。

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  • 来源
    《Magnetic Resonance in Medicine》 |2011年第3期|p.732-737|共6页
  • 作者

    Yohan van de Looij; Nicolas Kunz; Petra Hüppi; Rolf Gruetter; Stéphane Sizonenko;

  • 作者单位

    Department of Pediatrics, Division of Child Growth and Development, University of Geneva, Geneva, Switzerland|Laboratory for functional and metabolic imaging, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland;

    Department of Pediatrics, Division of Child Growth and Development, University of Geneva, Geneva, Switzerland|Laboratory for functional and metabolic imaging, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland;

    Department of Pediatrics, Division of Child Growth and Development, University of Geneva, Geneva, Switzerland;

    Laboratory for functional and metabolic imaging, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland|Department of Radiology, University of Lausanne, Lausanne, Switzerland|Department of Radiology, University of Geneva, Geneva, Switzerland;

    Department of Pediatrics, Division of Child Growth and Development, University of Geneva, Geneva, Switzerland;

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  • 正文语种 eng
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  • 关键词

    diffusion tensor imaging; ultra-high magnetic field; adiabatic radiofrequency pulse; rat brain; surface coil;

    机译：扩散张量成像超强磁场绝热射频脉冲大鼠脑表面线圈;

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