Right ventricular volumes and ejection fraction by MR imaging and stereology: Comparison with standard image analysis method
Right ventricular volumes and ejection fraction by MR imaging and stereology: Comparison with standard image analysis method
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磁共振成像和体视学的右心室容积和射血分数：与标准图像分析方法的比较
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
J. Damilakis
中科院分区：
文献类型：
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作者：
M. Mazonakis;K. Pagonidis;J. Damilakis
本研究的目的是检查体视学方法估计电影MR图像上右心室参数的准确性。采用体视学点计数法对19例疑似或已知冠状动脉疾病的连续患者的舒张末期容积（EDV）、收缩末期容积（ESV）、每搏输出量（SV）和射血分数（EF）进行了估计。体视学测量用不同的测试点网格进行。RV参数也是通过基于手动调整自动获得的内分泌轮廓的标准方法获得的。结果表明，两种方法的测定结果具有统计学差异和一致性，并对两种方法的重复性进行了测定。在所有MR图像上计数约100个测试点，EDV和ESV的平均误差系数分别为7.0 ± 1.3%和7.4 ± 2.1%。计数点数增加对容积估计精度的提高无统计学意义（EDV：P = 0.058; ESV：P = 0.333）。体视学估计值与标准方法无显著差异（EDV：P = 0.093; ESV：P = 0.072; SV：P = 0.291; EF：P = 0.300）。两种方法之间95%的一致性限度在临床上是可接受的（EDV：−12.1 cm 3，18.9 cm 3; ESV：−6.4 cm 3，10.4 cm 3; SV：−10.5 cm 3，13.5 cm 3; EF：− 7.5%，6.3%）。体视学估计的重复性优于标准方法（变异系数：3.4-5.3% vs 4.0-7.1%）。体视学的测量时间小于4 min。由于其准确性和重复性，体视学方法可以被认为是对标准方法的改进。临床解剖学24：868-873，2011。© 2011 Wiley利斯公司
The purpose of this study was to examine the accuracy of the stereological method for estimating right ventricular parameters on cine MR images. The end‐diastolic volume (EDV), end‐systolic volume (ESV), stroke volume (SV), and ejection fraction (EF) were estimated in 19 consecutive patients with suspected or known coronary artery disease employing the stereological point counting method. Stereological measurements were performed with different grids of test points. The RV parameters were also derived by the standard method based on the manual adjustment of automatically obtained endocardial contours. The statistical difference and agreement between the two methods was found. Measurement reproducibility of both methods was determined. The counting of about 100 test points on all MR images provided EDV and ESV with a mean coefficient of error of 7.0 ± 1.3% and 7.4 ± 2.1%, respectively. The volume estimation precision was not significantly improved by counting more points (EDV: P = 0.058; ESV:P = 0.333). Stereological estimations were not significantly different from those by the standard method (EDV: P = 0.093; ESV: P = 0.072; SV: P = 0.291; EF: P = 0.300). The 95% limits of agreement between the two methods were clinically acceptable (EDV: −12.1 cm3, 18.9 cm3; ESV: −6.4 cm3, 10.4 cm3; SV: −10.5 cm3, 13.5 cm3; EF: −7.5%, 6.3%). The repeatability of stereological estimations was better than that of the standard method (coefficient of variability: 3.4–5.3% versus 4.0–7.1%). The measurement time with stereolgy was less than 4 min. The stereological method may be considered as an improvement over the standard method due to its accuracy and repeatability. Clin. Anat. 24:868–873, 2011. © 2011 Wiley‐Liss, Inc.
使用快照梯度法通过核磁共振成像快速、准确、同步地无创评估右心室和左心室质量。
影响因子：
24
作者：
McDonald,KM;Parrish,T;Wennberg,P;Stillman,AE;Francis,GS;Cohn,JN;Hunter,D
通讯作者：
Hunter,D