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首页> 外文期刊>American Journal of Neuroradiology >Normal Fetal Lumbar Spine on Postmortem MR Imaging
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Normal Fetal Lumbar Spine on Postmortem MR Imaging

机译：死后MR成像的正常胎儿腰椎

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BACKGROUND AND PURPOSE: There is an increasing interest in use of postmortem MR imaging as an adjunct or alternative to autopsy. Before evaluating spinal pathology on postmortem MR imaging, it is important to have knowledge of the normal appearance of the fetal spine at different gestational ages. The aim of this study is to describe the MR imaging appearances of normal development of the fetal spine at different gestational ages. METHODS: Postmortem MR imaging was performed on 30 fetuses ranging from 14 to 41 gestational weeks. There was no structural abnormality of the spine in these fetuses on MR imaging or at autopsy. Fast spin-echo T2-weighted MR imaging of the lumbar spine was performed in the coronal plane in all cases and supplemented by sagittal and/or axial imaging. The following parameters were measured: height of the L1/2 disk and L2 vertebral body and area of ossification center in L2 vertebral body as well as area of vertebral body. The signal intensity of the disk space and the vertebral level of conus termination were also assessed. RESULTS: The height and area of the vertebral body increased linearly with gestational age (P <.01). The increase in disk space was proportionally greater than the increase in vertebral body height as gestational age increased (P <.01). The disk space appeared as a linear low-signal-intensity area in fetuses 21 weeks gestation but increasingly developed high signal intensity in the disk after 21 weeks. The size of the ossification center increased with gestational age (P <.01), and the ratio of ossification center to the overall size of the vertebral body also increased with gestational age (P <.01). In fetuses less than 35 weeks of age, the conus lay between L2 and L5 level, whereas in fetuses more than 35 weeks of age, the conus lay between L1/2 and L2/3 level. CONCLUSION: Understanding the normal growth and signal-intensity characteristics of the fetal spine on postmortem MR imaging is essential before studying abnormal fetal spine.
机译：背景与目的：尸检MR成像作为尸体解剖的辅助手段或替代方法的兴趣日益浓厚。 在评估尸检MR成像的脊柱病理之前， < / sup>重要的是要知道 胎龄在不同胎龄的正常外观。 研究的目的是描述不同胎龄胎儿脊柱正常发育的MR成像表现。 方法：验尸MR成像在30个胎儿上进行了检查，这些胎儿的范围从 到孕14到41周。在磁共振成像或尸检中，这些胎儿的脊柱没有异常。在所有情况下均在冠状面上对腰椎进行快速 自旋回波T2加权MR成像，并辅以矢状 和/或轴向成像。测量以下参数：L1 / 2椎间盘和L2椎体的高度，以及L2椎体中骨化的区域 的中心以及椎体的面积。 > 还评估了椎间盘空间的信号强度和椎体终止的椎骨水平 。 结果：椎体的高度和面积增加了 与胎龄成线性关系（P <.01）。随着胎龄的增加，磁盘 空间的增加成比例地大于椎骨 身高的增加（P <.01）。磁盘 空间在胎儿 妊娠21周时表现为线性低信号强度区域，但21周后磁盘中的高信号强度 逐渐发展周。骨化中心 的大小随胎龄的增加而增加（P <.01），并且 骨化中心与椎体总体大小的比率 也随着胎龄的增加而增加（P <.01）。在小于35周龄的胎儿中，圆锥体位于L2和L5水平之间，而在大于35周龄的胎儿中，圆锥体位于 结论：了解死后MR成像中胎儿脊柱的正常生长和信号强度 的特征 sup>对于研究异常胎儿的脊柱至关重要。

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  • 来源
    《American Journal of Neuroradiology》 |2006年第3期|00000553-00000559|共7页
  • 作者

    E. Widjaja; E.H. Whitby; M.N.J. Paley; P.D. Griffiths;

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    From the Academic Section of Radiology, University of Sheffield, Sheffield, United Kingdom;

    From the Academic Section of Radiology, University of Sheffield, Sheffield, United Kingdom;

    From the Academic Section of Radiology, University of Sheffield, Sheffield, United Kingdom;

    From the Academic Section of Radiology, University of Sheffield, Sheffield, United Kingdom;

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