ISSN 1004-4140
CN 11-3017/P

感兴趣区大小对单源双能CT能谱成像CT值及水(碘)浓度值影响

刘泽群, 孙美玉, 刘爱连, 韩铮

刘泽群, 孙美玉, 刘爱连, 韩铮. 感兴趣区大小对单源双能CT能谱成像CT值及水(碘)浓度值影响[J]. CT理论与应用研究, 2016, 25(2): 129-134. DOI: 10.15953/j.1004-4140.2016.25.02.01
引用本文: 刘泽群, 孙美玉, 刘爱连, 韩铮. 感兴趣区大小对单源双能CT能谱成像CT值及水(碘)浓度值影响[J]. CT理论与应用研究, 2016, 25(2): 129-134. DOI: 10.15953/j.1004-4140.2016.25.02.01
LIU Ze-qun, SUN Mei-yu, LIU Ai-lian, HAN Zheng. Influence of the Size of Regions of Interest on CT Value and Material Decomposition Measurement in Water Phantom by Single-source Dual Energy CT[J]. CT Theory and Applications, 2016, 25(2): 129-134. DOI: 10.15953/j.1004-4140.2016.25.02.01
Citation: LIU Ze-qun, SUN Mei-yu, LIU Ai-lian, HAN Zheng. Influence of the Size of Regions of Interest on CT Value and Material Decomposition Measurement in Water Phantom by Single-source Dual Energy CT[J]. CT Theory and Applications, 2016, 25(2): 129-134. DOI: 10.15953/j.1004-4140.2016.25.02.01

感兴趣区大小对单源双能CT能谱成像CT值及水(碘)浓度值影响

基金项目: 

国家自然科学基金(84170078)

详细信息
    作者简介:

    刘泽群(1991-),女,大连医科大学附属第一医院硕士研究生在读,主要从事腹部放射诊断研究,Tel:15140346270,E-mail:597280599@qq.com

  • 中图分类号: R814;R445

Influence of the Size of Regions of Interest on CT Value and Material Decomposition Measurement in Water Phantom by Single-source Dual Energy CT

  • 摘要: 目的:应用单源双能CT对标准水膜进行能谱扫描,探讨不同大小感兴趣区(ROI)对CT值及宝石能谱成像(GSI)水(碘)浓度值的影响。方法:利用GSI模式扫描标准水膜,层厚1.25 mm,间距1.25 mm。扫描参数:扫描视野medium,转速0.8 s/转,螺距0.984,探测器宽度40 mm,电流550 m A。以水膜中心为圆心,在水膜中心位置分别画两个面积为(600±30) mm2、(3 000±30) mm2的ROI,分别为ROI1、ROI2。将单能量图像(70ke V)载入能谱成像分析软件GSI viewer进行分析,分别测量ROI1、ROI2的CT值(HU)、水(碘)值(mg/cm3)并记录,统计学分析采用配对样本t检验,若P<0.05为差异有统计学意义。结果:ROI1的平均CT值为(2.45±1.83) HU,ROI2的平均CT值为(2.55±1.68) HU,两者之间的差异无统计学意义(P=0.06);ROI1的平均水(碘)值为(1 001.22±0.86) mg/cm3,ROI2的平均水(碘)值为(1 001.31±0.84) mg/cm3,两者之间的差异无统计学意义(P=0.135)。结论:改变ROI大小不影响单源双能CT图像中CT值和水(碘)含量的测定。
    Abstract: Objective: To investigate the effect of different size of Region of interest(ROI) on CT value and material decomposition measurement in the standard water phantom using single-source dual-energy CT. Methods: The standard water phantom provided by GE company was scanned by single-source dual-energy CT machine(Discovery CT 750 HD, America GE Company). The image processing was performed on GSI Viewer browser to acquire and record CT value(HU), the concentration value of water-iodine(mg/cm3). The scanning parameters were as follows: scanning visual field: medium, rotating speed of 0.8 seconds/rotation, pitch 0.984, detector width 40 mm, current: 550 m A. The two drawn ROIs were round, located in the central part of the water phantom. Their areas were(600 ± 30) mm2 and(3 000 ± 30) mm2, and then recorded as ROI1 and ROI2 respectively. Paired sample t test was used for statistical analysis. Results: ROI1 CT value was(2.45 ± 1.83) HU, ROI2 CT value was(2.55 ± 1.68) HU, there was no statistical significance between CT value of ROI1 and ROI2(P = 0.06); The water-iodine value was(1 001.22 ± 0.86) mg/cm3 in ROI1, and that of ROI2 was(1 001.31 ± 0.84) mg/cm3, there was no statistical significance between water iodine value of ROI1 and ROI2(P = 0.135). Conclusions: Different ROI size will have no effect on the measurement of CT value and the concentration of water-iodine from single-source dual energy CT.
  • 期刊类型引用(1)

    1. 贾祯,李卫星,盛俊卿. GSI定量参数对NSCLC患者病理分化程度评估价值探讨. 社区医学杂志. 2020(12): 886-890 . 百度学术

    其他类型引用(3)

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出版历程
  • 收稿日期:  2015-11-26
  • 网络出版日期:  2022-12-01
  • 发布日期:  2016-04-24

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