| 64层螺旋CT重建层厚及重建间距与CAD肺结节检出准确性的关系分析 |
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| 引用本文： | 齐敏,雷晓燕,黄明刚,张小玲,吴晓红,郭佑民.64层螺旋CT重建层厚及重建间距与CAD肺结节检出准确性的关系分析[J].第四军医大学学报,2009,30(10):932-935. |
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| 作者姓名： | 齐敏 雷晓燕 黄明刚 张小玲 吴晓红 郭佑民 |
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| 作者单位： | 齐敏,QI Min(西安交通大学医学院第二附属医院影像中心,陕西,西安,710004;陕西省人民医院影像中心,陕西,西安,710068);雷晓燕,黄明刚,张小玲,吴晓红,LEI Xiao-Yan,HUANG Ming-Gang,ZHANG Xiao-Ling,WU Xiao-Hong(陕西省人民医院影像中心,陕西,西安,710068);郭佑民,GUO You-Min(西安交通大学医学院第二附属医院影像中心,陕西,西安,710004)
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| 基金项目： | 陕西省科学技术研究发展计划 |
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| 摘 要： | 目的：评估不同重建层厚及重建间距对Lung Care软件CAD系统检出肺结节准确性的影响.方法：纳入48例肺结节患者,每位患者重建5组数据,层厚/间距分别为：0.75/0.70mm,1/1mm,3/3mm,5/1mm,5/5mm.利用ROC曲线对比不同重建参数时CAD的检测准确性.结果：根据参考标准共检出152个肺结节.在0.75,1mm层厚时的曲线下面积（Az）值（分别为0.86,0.84）均显著高于3,5mm层厚时（3/3,5/1,5/5mm时Az值分别为0.48,0.53,0.40）（P〈0.05）;重叠重建（5/1mm）时,CAD检出肺结节的Az值（Az=0.53）大于5mm层距时（Az=0.40）,二者无显著性差异,但明显低于1mm层厚重建（Az=0.84,P〈0.05）.1mm层厚重建时CAD检出肺结节的灵敏度最高（84%）;0.75mm层厚重建时平均每位患者的假阳性数最低（0.56）.随层厚增加,CAD检出肺结节的平均直径逐渐增大,检出小结节的数目明显下降.结论：使用薄层重建（层厚0.75mm或1mm）图像时,CAD的检出准确性显著高于厚层重建（层厚3mm或5mm）时.重叠重建（5/1mm）可以提高CAD的准确性,但其作用非常有限.
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| 关 键 词： | 计算机辅助检测 肺结节 体层摄影术 螺旋计算机 图像重建 |
Relationship of reconstruction slice thickness and interval with accuray of computer-aided detection system:detection of pulmonary nodules by 64-slice helical CT |
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| QI Min,LEI Xiao-Yan,HUANG Ming-Gang,ZHANG Xiao-Ling,WU Xiao-Hong,GUO You-MinImaging Center,Second Affiliated Hospital,Medical School of Xi''an Jiaotong University,Xi''an ,China,Imaging Center,Shaanxi Province People''s Hospital,Xi''an.Relationship of reconstruction slice thickness and interval with accuray of computer-aided detection system:detection of pulmonary nodules by 64-slice helical CT[J].Journal of the Fourth Military Medical University,2009,30(10):932-935. |
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| Authors: | QI Min LEI Xiao-Yan HUANG Ming-Gang ZHANG Xiao-Ling WU Xiao-Hong GUO You-MinImaging Center Second Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an China Imaging Center Shaanxi Province People's Hospital Xi'an |
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| Affiliation: | QI Min1,2,LEI Xiao-Yan2,HUANG Ming-Gang2,ZHANG Xiao-Ling2,WU Xiao-Hong2,GUO You-Min11Imaging Center,Second Affiliated Hospital,Medical School of Xi'an Jiaotong University,Xi'an 710004,China,2Imaging Center,Shaanxi Province People's Hospital,Xi'an 710068 |
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| Abstract: | AIM:To evaluate the effect of various reconstruction slice thicknesses and reconstruction intervals on diagnostic accuracy of pulmonary nodules with the computer-aided detection (CAD) system of LungCare software. METHODS:Forty-eight patients with pulmonary nodules, five sets of CT images were reconstructed in each patient by selecting five reconstruction slice thickness and interval combinations respectively: 0.75/0.70 mm, 1/1 mm,3/3 mm, 5/1 mm, 5/5 mm.The performance of the CAD system using different recon... |
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| Keywords: | computer-assisted detection lung nodules tomography spiral computed image reconstruction |
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