| 张欢欢,林丽萍,王宇喆,温群,王娇燕.ROI选择方法对高级别胶质瘤增强T1WI直方图参数的影响[J].中国医学影像技术,2019,35(6):818~822 |
| ROI选择方法对高级别胶质瘤增强T1WI直方图参数的影响 |
| Impact of different ROI selection methods on histogram analysis parameters based on enhanced T1WI of high-grade gliomas |
| 投稿时间：2018-11-11 修订日期：2019-04-15 |
| DOI：10.13929/j.1003-3289.201811061 |
| 中文关键词: 神经胶质瘤 磁共振成像 直方图分析 感兴趣区 |
| 英文关键词:glioma magnetic resonance imaging histogram analysis region of interest |
| 基金项目:上海市闵行区卫生和计划生育委员会基金（2018MW04）。 |
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| 中文摘要: |
| 目的 观察高级别胶质瘤增强T1WI直方图分析中选择不同ROI的可重复性及对测量直方图特征参数的影响。方法 2名医师分别使用4种方法（小ROI法、轮廓ROI法、阈值ROI法和体积ROI法）选择ROI对45例高级别胶质瘤增强T1WI进行直方图参数测量，评价观察者间一致性及测量直方图参数的差异。结果 2名医师采用体积、轮廓和阈值ROI法测量平均值、标准差和峰度值均一致性好（ICC均≥ 0.80），偏度值一致性为中等至好（ICC为0.73~0.90），采用小ROI法测量直方图特征参数的一致性为较低至中等（ICC为0.30~0.69）。体积ROI法测量各直方图特征参数与轮廓ROI法比较差异均无统计学意义（P均>0.05）；阈值ROI法测量平均值、偏度值、峰度值均高于体积和轮廓ROI法，标准差均低于体积和轮廓ROI法（P均<0.05）；小ROI法测量标准差均低于体积和轮廓ROI法（P均<0.05）。结论 采用体积ROI法测量高级别胶质瘤增强T1WI图像直方图特征参数一致性最高；不同方法选择ROI对增强T1WI图像直方图特征参数测量结果存在一定影响。 |
| 英文摘要: |
| Objective To investigate the repeatability of different ROI seletion methods on histogram analysis parameters of enhanced T1-weighted images of high-grade gliomas (HGGs). Methods Four ROI selecting methods (small ROI method, contour ROI method, threshold ROI method and volume ROI method) were used to measure the histogram parameters on enhanced T1WI of 45 HGGs patients. The consistency between 2 observers and the differences of histogram parameters were evaluated. Results The consistent of the mean, standard deviation and kurtosis values measured using volume, contour and threshold ROI methods between 2 observers were good (ICC ≥ 0.80), and of the skewness values were moderate to good (ICC=0.73-0.90). The consistent of histogram characteristic parameters measured using small ROI method between 2 observers were low to medium (ICC=0.30-0.69). Histogram characteristic parameters measured with volume ROI method and contour ROI method had no significant difference (all P>0.05), but the average value, skewness value and kurtosis value measured with threshold ROI method were higher than those with volume and contour ROI method (all P<0.05), and the standard deviation of threshold ROI method was lower than that of volume ROI method and contour ROI method (both P<0.05). Standard deviation measured with small ROI method was lower than that of volume ROI method and contour ROI method (all P<0.05). Conclusion The consistency of histogram characteristic parameters of HGGs on enhanced T1WI measured with volume ROI method is the highest, and different ROI selection methods have some impact on the measurement results of histogram characteristic parameters of enhanced T1WI. |
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