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首页> 外文期刊>Academic radiology >Distribution of abdominal aortic calcium by computed tomography. Impact of analysis method on quantitative calcium score.
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Distribution of abdominal aortic calcium by computed tomography. Impact of analysis method on quantitative calcium score.

机译：计算机断层扫描的腹主动脉钙分布。 分析方法对定量钙评分的影响。

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摘要

Rationale and Objectives: Abdominal aortic calcification (AAC) can be quantified using computed tomography (CT), but imaging planesare prescribed based on bony landmarks, so that individual variation between the landmark and the aortoiliac junction can result in variable aortic coverage. In the Framingham CT substudy, we scanned a 15-cm (Z-direction) abdominal segment cranial to the S1 vertebral body. We sought to determine the range and distribution of length of aorta scanned and the distribution of AAC within the abdominal aorta and to compare burden of AAC measured from fixed-length segments versus AAC from all slices cranial to the aortoiliac bifurcation. Materials and Methods: AAC was quantified by modified Agatston score (AS) in 100 Framingham Heart Study participants (60±13years old, 51 men). We compared the AS measured from 5-cm and 8-cm segments with the ASALL (total visualized aorta). Results: Of 100, 73 participants had AAC 0. The total length of aorta imaged was ≥8cm in 84% of participants. Qualitatively, 5-cm and 8-cm segments correctly identified 96% and 99%, respectively, of participants as having or not having AAC. Quantitatively, AS8cm was within 20% of ASALL in four-fifths and within 30% of ASALL in nine-tenths of participants. AS5cm more severely underestimated ASALL. Conclusion: The use of S1 as the caudal imaging landmark in a 15-cm slab yields ≥8cm aortic coverage in most adults. Both 5-cm and 8-cm analysis strategies are comparable to analyzing the total visualized abdominal aorta for prevalent AAC, but only 8-cm segment analysis yields quantitatively similar measures of AAC.
机译：理由和目标：可以使用计算机断层扫描（CT）量化腹主动脉钙化（AAC），但是基于骨骼标准规定的成像平面图，使得地标和主动脉内接线之间的个体变化可能导致可变主动脉覆盖率。在Framingham CT Subludy中，我们扫描了15厘米（Z方向）腹部颅至S1椎体。我们寻求确定主动脉长度的范围和分布扫描和腹主动脉内AAC的分布，并比较从固定长度段测量的AAC的负担与AAC从所有切片颅部到主动脉分叉。材料和方法：通过修改的Agatston得分（AS）量化了AAC，在100个Framingham心脏研究参与者（60±13岁，51名男子）。我们将测量从5厘米和8厘米的段测量与ASALL（总体可视化主动脉）进行比较。结果：100,73名参与者有AAC＆ 0。主动脉成像的总长度≥8.8厘米，参与者的84％。定性，5厘米和8cm的段分别正确地确定了参与者的96％和99％，因为具有或不具有AAC。定量地，As8cm在五分之五，在五分之一的亚马尔内的20％内，九十分之九的亚马尔30％。 As5cm更严重低估了asall。结论：使用S1作为15厘米平板中的尾部成像地标在大多数成年人中产生≥8cm的主动脉覆盖率。 5厘米和8cm的分析策略均可与分析普遍的AAC的总体可视化腹主动脉相当，但只有8cm的段分析产生的AAC测量。

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  • 来源
    《Academic radiology》 |2013年第11期|共7页
  • 作者

    ChuangM.L.; LeslieR.W.; MassaroJ.M.; MandersE.S.; FoxC.S.; HoffmannU.; ODonnellC.J.;

  • 作者单位

    National Heart Lung and Blood Institute Framingham Heart Study 73 Mt Wayte Avenue Suite No. 2;

    National Heart Lung and Blood Institute Framingham Heart Study 73 Mt Wayte Avenue Suite No. 2;

    National Heart Lung and Blood Institute Framingham Heart Study 73 Mt Wayte Avenue Suite No. 2;

    National Heart Lung and Blood Institute Framingham Heart Study 73 Mt Wayte Avenue Suite No. 2;

    National Heart Lung and Blood Institute Framingham Heart Study 73 Mt Wayte Avenue Suite No. 2;

    Cardiac MR PET and CT Program Department of Radiology Massachusetts General Hospital Boston MA;

    National Heart Lung and Blood Institute Framingham Heart Study 73 Mt Wayte Avenue Suite No. 2;

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  • 正文语种 eng
  • 中图分类 放射医学;
  • 关键词

    Abdominal aorta; Calcium; Computed tomography; Population study; Segment length;

    机译：腹主动脉;钙;计算断层扫描;人口研究;段长度;

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