| 梁蕾,许卫,李坤成,杜祥颖,高艳.64排螺旋CT评价右心功能的方法研究[J].中国医学影像技术,2009,25(6):1025~1028 |
| 64排螺旋CT评价右心功能的方法研究 |
| Assessment of right ventricular function with 64-detector CT |
| 投稿时间：2008-11-03 修订日期：2009-03-23 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 磁共振成像 心室功能,右 多平面重建 容积重建 |
| 英文关键词:Tomography, X-ray computed Magnetic resonance imaging Ventricular function, right Multiple planar reconstructions Volume reconstructions |
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| 中文摘要: |
| 目的 应用64排螺旋CT定量评价右心室功能,分别采用短轴图像的多平面重建法(MPR)和3D容积重建法 (VR)进行处理,并以磁共振为对照,探讨两种方法右心功能评价指标与MR的相关性及64排螺旋CT在右心功能评价中的应用价值。 方法 30名健康成年志愿者均于24 h内接受心脏MSCT和MR检查。采用MPR、VR对CT原始数据分析后获得舒张末期容积(EDV)、收缩末期容积(ESV)、每搏输出量(SV)及射血分数(EF)等心功能指标,并与MR测得的相应指标进行相关性分析。 结果 MPR法MSCT与MRI右心功能指标差异无统计学意义(r=0.612~0.959);VR法MSCT与MRI右心功能指标相关性低(r=0.312~0.780)。 结论 MPR法64排螺旋CT在右心功能定量评价方面较准确、可靠,与1.5T磁共振评价右心功能各指标之间相关性高。VR法64排螺旋CT由于右心室对比剂充盈不均准确性欠佳。 |
| 英文摘要: |
| Objective To assess right ventricular global function with 64-detector spiral computed tomography using two different software tools (both MPR and VR methods). Methods Thirty healthy subjects underwent cardiac CT. With semiautomatic contour detection software, end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV) and ejection fraction (EF) were obtained from short-axis CT reformations (MPR) created at every 5% of the RR-interval. End-systolic and end-diastolic axial images were transformed to 3D tools to calculate the volumes with a threshold-supported reconstruction algorithm. Steady-state free-precession cine-MRI of the heart was done in short-axis orientation. Results Mean EDV, ESV, SV and EF determined with MPR-CT correlated well with MRI (r=0.612—0.959). Threshold supported 3D reconstructions revealed insufficient correlations with MRI (r=0.312—0.780). Conclusion MPR-based semiautomatic analysis of cardiac 64-detector CT allows for RV functional analysis. The results correlate well with MRI findings. Threshold value-supported 3D reconstructions are not good because of inhomogeneities of RV contrast enhancement. |
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