Quantitative Radiology: Automated CT Liver Volumetry Compared With Interactive Volumetry and Manual Volumetry
Quantitative Radiology: Automated CT Liver Volumetry Compared With Interactive Volumetry and Manual Volumetry
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DOI：
10.2214/ajr.10.5958
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发表时间：
2011-10-01
影响因子：
5
通讯作者：
Baron, Richard L.
中科院分区：
文献类型：
--
作者：
Suzuki, Kenji;Epstein, Mark L.;Baron, Richard L.
OBJECTIVE.本研究的目的是评估自动CT容积法在活体供肝移植评估中的应用，并将该技术与软件辅助交互式容积法和手动容积法进行比较。根据肝移植方案获得18例连续登记的前瞻性肝供体的肝脏CT扫描。自动肝脏容积测量是在三维活动轮廓分割的基础上发展起来的。为了建立参考标准肝脏体积，放射科医师手动追踪每个CT切片上的肝脏轮廓。我们比较了自动和交互式容量法与本研究的参考标准手动容量法获得的结果。平均交互肝脏体积为1553 +/- 343 cm（3），平均自动肝脏体积为1520 +/- 378 cm（3）。平均手动体积为1486 ± 343 cm（3）。交互式和自动体积结果与手动体积结果（组内相关系数，0.96和0.94）有很好的一致性。自动容量法的平均使用时间为0.57 ± 0.06 min/例，而交互式容量法和手动容量法的平均使用时间分别为27.3 ± 4.6 min/例和39.4 ± 5.5 min/例，差异有统计学意义（p < 0.05）。交互式和自动容积法都能准确地用CT测量肝脏体积，但自动容积法效率更高。
OBJECTIVE. The purpose of this study was to evaluate automated CT volumetry in the assessment of living-donor livers for transplant and to compare this technique with software-aided interactive volumetry and manual volumetry.MATERIALS AND METHODS. Hepatic CT scans of 18 consecutively registered prospective liver donors were obtained under a liver transplant protocol. Automated liver volumetry was developed on the basis of 3D active-contour segmentation. To establish reference standard liver volumes, a radiologist manually traced the contour of the liver on each CT slice. We compared the results obtained with automated and interactive volumetry with those obtained with the reference standard for this study, manual volumetry.RESULTS. The average interactive liver volume was 1553 +/- 343 cm(3), and the average automated liver volume was 1520 +/- 378 cm(3). The average manual volume was 1486 +/- 343 cm(3). Both interactive and automated volumetric results had excellent agreement with manual volumetric results (intraclass correlation coefficients, 0.96 and 0.94). The average user time for automated volumetry was 0.57 +/- 0.06 min/case, whereas those for interactive and manual volumetry were 27.3 +/- 4.6 and 39.4 +/- 5.5 min/case, the difference being statistically significant (p < 0.05).CONCLUSION. Both interactive and automated volumetry are accurate for measuring liver volume with CT, but automated volumetry is substantially more efficient.