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首页> 外文期刊>Academic radiology >Characterization of Carotid Artery Plaque Components on Magnetic Resonance Imaging Using Signal Intensity of the Phantom as a Reference
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Characterization of Carotid Artery Plaque Components on Magnetic Resonance Imaging Using Signal Intensity of the Phantom as a Reference

机译：用幻像作为参考信号强度的磁共振成像对颈动脉斑块成分的表征

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摘要

Rationale and Objectives: To evaluate the properties of plaque by the use of magnetic resonance imaging (MRI), it is necessary to use amaterial with stable signal intensity (eg, muscle or submandibular gland) as a reference. However, there may be differences between individuals. Therefore, we used a small phantom set on the circumference of the neck as a reference. The signal intensity ratio (SIR) methods using the phantom as a reference were reviewed for discrimination of the properties of plaque in the carotid artery. Materials and Methods: Three phantoms (phantom 1: water; phantom 2: 5μmol gadopentetate dimeglumine; and phantom 3: 2.5μmol gadopentetate dimeglumine) were set around the neck. SIR was calculated for each region of interest and compared according to pathological grade. Results: The method using a phantom as a reference reduced the standard deviations of tissue ratios to 0.16 from 0.27 in comparison with the method using muscle and showed a close correlation with pathological grade. In addition, the agreement rates with pathological grade and grades from each SIR using signal intensity of the phantom as a reference were higher than using signal intensity of the muscle as a reference to 0.86 from 0.63 for two-dimensional images and to 0.86 from 0.71 for three-dimensional images. Conclusions: The method described here reduced error compared to the method using muscle as a reference, and the results were closely correlated with pathological grade.
机译：理由和目的：评价通过使用磁共振成像（MRI）的斑块的性能，有必要使用与amaterial稳定的信号强度（例如，肌肉或颌下腺）作为参考。然而，也有可能是个人之间的差异。因此，我们使用在颈部上作为基准的圆周上的小幻象集。使用幻象作为参考的信号强度比（SIR）方法斑块在颈动脉性质的判别进行了综述。材料和方法：三幻影（虚线1：水;幻象2：给予5μmol钆喷葡胺;以及虚线3：2.5μmol钆喷葡胺）的围绕颈部设置。 SIR是根据病理分级计算每个感兴趣的区域并进行比较。结果：使用幻象为基准从0.27与使用肌肉的方法相比降低了组织的比率的标准偏差0.16，并显示与病理分级密切相关的方法。此外，与病理分级和使用幻象作为参考的信号强度从每个SIR等级协议率比使用肌肉从0.63参考至0.86的信号强度为二维图像和0.86 0.71对更高三维图像。结论：该方法相比于使用肌肉作为参考该方法这里所述减小的误差，并将结果密切与病理分级相关。

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  • 来源
    《Academic radiology》 |2013年第12期|共6页
  • 作者

    OguraA.; HayakawaK.; MaedaF.; KajiharaM.; TakatsuY.; YamamuraK.;

  • 作者单位

    Graduate School Gunma Prefectural College of Health Sciences 323-1 Kamioki-machi Maebashi;

    Department of Radiology Kyoto City Hospital Kyoto Japan;

    Department of Radiology Kyoto City Hospital Kyoto Japan;

    Department of Radiology Kyoto City Hospital Kyoto Japan Graduate school Osaka University;

    Department of Radiology Osaka Red Cross Hospital Osaka Japan Division of Health Sciences;

    Division of Health Sciences Graduate School of Medical Sciences Kanazawa University Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 放射医学;
  • 关键词

    Carotid artery; Characterization of plaque; Phantom signal; Plaque;

    机译：颈动脉;斑块的特征;幻影信号;斑块;

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