| 李雪丹,朱玉森,刘屹,任克,徐克.MSCT测量胃癌体积的层厚选取及可重复性[J].中国医学影像技术,2013,29(5):757~760 |
| MSCT测量胃癌体积的层厚选取及可重复性 |
| Reproducibility and thickness selection in measurement of gastric cancer volume using MSCT |
| 投稿时间：2012-10-14 修订日期：2012-11-30 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 胃肿瘤 体积 重复性 |
| 英文关键词:Tomography, X-ray computed Gastric neoplasms Volumetry Reproducibility |
| 基金项目:辽宁省自然科学基金(20092121)。 |
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| 摘要点击次数: 3571 |
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| 中文摘要: |
| 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3 mm、5 mm和7 mm层厚进行胃癌体积测量,并由另1名医师以5 mm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 3 mm、5 mm、7 mm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)。3 mm和5 mm层厚测量胃癌体积差异无统计学意义(P=0.298);3 mm和7 mm层厚、5 mm和7 mm层厚测量结果差异有统计学意义(P均<0.05)。3 mm和5 mm、3 mm和7 mm、5 mm和7 mm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3 mm、5 mm、7 mm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5 mm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3 mm和5 mm层厚较佳;选用5 mm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。 |
| 英文摘要: |
| 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 mm, 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)cm3, (64.74±47.13)cm3 and (63.56±45.82)cm3(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)cm3 and (65.32±45.82)cm3 (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. |
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