摘要
目的探讨MSCT测量胃癌体积的层厚选取,评价MSCT测量胃癌体积的可重复性。方法将33例胃癌的MSCT图像传输至工作站,分别用3mm、5mm和7mm层厚进行胃癌体积测量,并由另1名医师以5mm层厚对所有胃癌体积进行重复测量。计算观察者内或观察者间的差异。结果 3mm、5mm、7mm层厚测得胃癌体积分别为(65.06±46.87)cm3、(64.74±47.13)cm3和(63.56±45.82)cm3(F=5.409,P<0.05)。3mm和5mm层厚测量胃癌体积差异无统计学意义(P=0.298);3mm和7mm层厚、5mm和7mm层厚测量结果差异有统计学意义(P均<0.05)。3mm和5mm、3mm和7mm、5mm和7mm层厚测量胃癌体积的组内相关系数分别为0.992、0.990、0.988。用3mm、5mm、7mm层厚测量胃癌体积所需时间分别为(30.6±15.5)min、(20.0±11.8)min和(12.3±6.4)min。两名观察者用5mm层厚测量的胃癌体积平均值分别是(64.74±47.13)cm3和(65.32±45.82)cm3,差异无统计学意义(F=1.386,P=0.248),组内相关系数为0.998。结论 MSCT测量胃癌体积时选用3mm和5mm层厚较佳;选用5mm层厚测量胃癌体积节省工作时间;MSCT胃癌体积测量具有较高的一致性和可重复性。
Objective To investigate the slice thickness selection of measuring gastric cancer volume using MSCT, and to evaluate the reproducibility of the measurement of gastric cancer volume with MSCT. Methods MSCT image data of 33 patients with gastric cancer were transferred to the workstation. Gastric cancer volume was measured with the slice thickness of 3 mm, 5 mm and 7 ram, respectively, and was repeatedly measured with 5 mm slice thickness by another experienced radiologist. Intra-observer and inter-observer variability was calculated. Results Gastric cancer volume measured with slice thickness of 3 mm, 5 mm and 7 mm were （65.06±46.87）cm^3 , （64.74±47.13）cm^3 and （63.56±45.82）cm^3 （F=5. 409, P〈0. 05）, respectively. Analysis of variance of the repeatedly measured results showed that the differences between 3 mm and 7 mm, 5 mm and 7 mm had statistical significance （all P〈0.05）, while the difference between 3 mm and 5 mm had no statistical significance （P： 0. 298）. Interclass correlation coefficient of the slice thickness of 3 mm and 5 mm, 3 mm and 7 mm, 5 mm and 7 mm in measuring gastric cancer volume were 0. 992, 0. 990, 0. 988, respectively. Time costed was （30.6±15.5）min, （20. 0±11.8）min and （12.3±6.4）min when measured with slice thickness of 3 mm, 5 mm and 7 mm, respectively. The gastric cancer volumes measured by two observers with 5 mm slice thickness were （64.74±47.13）cm^3 and （65.32±45.82）cm^3 （F=1. 386, P=0. 248）, respectively. And the interclass correlation coefficient was 0. 998. Conclusion It is better to select slice thickness of 3 mm and 5 mm to measure gastric cancer volume using MSCT. Selection of 5 mm slice thickness measuring gastric cancer volume can spare time. Measurement of gastric cancer volume with MSCT is of high consistency and reproducibility and has clinical value.
出处
《中国医学影像技术》
CSCD
北大核心
2013年第5期757-760,共4页
Chinese Journal of Medical Imaging Technology
基金
辽宁省自然科学基金(20092121)
关键词
体层摄影术
X线计算机
胃肿瘤
体积
重复性
Tomography, X-ray computed
Gastric neoplasms
Volumetry
Reproducibility
