期刊
ACADEMIC RADIOLOGY
卷 19, 期 4, 页码 389-394出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.acra.2011.12.002
关键词
Lung; ground-glass opacity; computed tomography; diameter; interobserver agreement
资金
- Ministry of Health, Labor and Welfare, Tokyo, Japan [21-5-1, 23-A-25, 19-1]
- Third-term Comprehensive Cancer Control Strategy
Purpose: To evaluate interobserver agreement in regard to measurements of focal ground-glass opacities (GGO) diameters on computed tomography (CT) images to identify increases in the size of GGOs. Materials and Methods: Approval by the institutional review board and informed consent by the patients were obtained. Ten GGOs (mean size, 10.4 mm; range, 6.5-15 mm), one each in 10 patients (mean age, 65.9 years; range, 58-78 years), were used to make the diameter measurements. Eleven radiologists independently measured the diameters of the GGOs on a total of 40 thin-section CT images (the first [n = 10], the second [n = 10], and the third [n = 10] follow-up CT examinations and remeasurement of the first [n = 10] follow-up CT examinations) without comparing time-lapse CT images. Interobserver agreement was assessed by means of Bland-Altman plots. Results: The smallest range of the 95% limits of interobserver agreement between the members of the 55 pairs of the 11 radiologists in regard to maximal diameter was -1.14 to 1.72 mm, and the largest range was -7.7 to 1.7 mm. The mean value of the lower limit of the 95% limits of agreement was -3.1 +/- 1.4 mm, and the mean value of their upper limit was 2.5 +/- 1.1 mm. Conclusion: When measurements are made by any two radiologists, an increase in the length of the maximal diameter of more than 1.72 mm would be necessary in order to be able to state that the maximal diameter of a particular GGO had actually increased.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据