应用定量CT测量肝脏脂肪含量的可重复性分析
Reproducibility of liver fat content measured using quantitative computed tomography
目的:对在体检人群中应用定量CT(QCT)技术测量肝脏脂肪含量的可重复性进行评估,为QCT应用于临床肝脏脂肪含量测量提供依据。方法:2019年4—7月,连续抽取在河南省人民医院健康管理科行QCT检查的291例体检者,男性214例(73.5%),女性77例(26.5%),年龄(48.7±11.0)岁。采用QCT工作站测量体检者的肝脏脂肪含量,由3位测量者(A、B、C)在QCT工作站上独立测量肝脏脂肪含量,测量者A在2周后重复测量1次,测量者A两次测量结果取均值作为其最终测量结果。采用均数±标准差描述计量资料,采用组内相关系数( ICC)评价测量者间和测量者内测量结果的可重复性。 结果:测量者A的第1次测量结果为(10.46±5.55)%,第2次为(10.66±5.59)%,最终结果为(10.56±5.51)%;测量者B、C测量结果分别为(10.70±5.45)%、(10.86±5.77)%。测量者A、B、C之间肝脏脂肪测量结果的 ICC=0.960(95% CI:0.951~0.967, P<0.001)。测量者A的2次肝脏脂肪测量结果 ICC=0.953(95% CI:0.941~0.962, P<0.001)。均 ICC>0.75,一致性均较好。 结论:在测量方法一致的前提下,采用QCT工作站测得的肝脏脂肪含量结果在测量者间和测量者内都具有良好的重复性,有一定的临床应用前景。
更多Objective:To provide support for the clinical application of quantitative computed tomography (QCT) in the measurement of liver fat content, this study evaluated the intra-observer and inter-observer reproducibility of liver fat content measured by QCT in a population receiving physical examinations.Methods:From April to July 2019, 291 people were consecutively selected who underwent QCT examination in the health management department of Henan Provincial People′s Hospital. There were 214 males (73.5%) and 77 females (26.5%), aged 48.7±11.0. We measured liver fat content by QCT workstation. Three observers (A, B, C) measured their liver fat content independently, then observer A performed re-testing two weeks later. The mean value of the two measurements from observer A was taken as the final result. Measurement data were described by mean±SD. Intra-observer and inter-observer reproducibility were assessed using intra-class correlation coefficients ( ICC). Results:The first measurement result for observer A was 10.46±5.55 and the second measurement for observer A was 10.66±5.59, resulting in a final value of 10.56±5.51. The measurement results of observers B and C were 10.70±5.45 and 10.86±5.77, respectively. The ICC value of liver fat content values measured by the three observers was 0.960 (95% CI: 0.951-0.967, P<0.001) and the ICC value of liver fat content values for the two measurements of observer A was 0.953 (95% CI: 0.941-0.962, P<0.001). The ICC values were>0.75, so reproducibility of results was good. Conclusions:If the measurement method is consistent, the results for liver fat content measured by a conventional CT scanner and QCT workstation will have good reproducibility between and within observers, and will also have certain clinical application prospects.
More- 浏览:317
- 被引:8
- 下载:262
相似文献
- 中文期刊
- 外文期刊
- 学位论文
- 会议论文