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首页> 外文期刊>Cardiology >Three-Dimensional Echocardiography: Rational Mode of Component Images for Left Ventricular Volume Quantitation.
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Three-Dimensional Echocardiography: Rational Mode of Component Images for Left Ventricular Volume Quantitation.

机译：三维超声心动图：左心室量定量的组件图像的合理模式。

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Three-dimensional echocardiography (3DE) improves the accuracy of left ventricle (LV) volumetry compared with the two-dimensional echocardiography (2DE) approach because geometric assumptions in the algorithms may be eliminated. The relationship between accuracy of mode (short- versus long-axis planimetry) and the number of component images versus time required for analysis remains to be determined. Sixteen latex models simulating heterogeneously distorted (aneurysmatic) human LVs (56-303 ml; mean 182 +/- 82 ml) were scanned from an 'apical' position (simultaneous 2DE and 3DE). For 3DE volumetry, the slice thickness was varied for the short (C-scan) and long axes (B-scan) in 5-mm steps between 1 and 25 mm. The mean differences (true-echocardiographic volumes) were 16.5 +/- 44.3 ml in the 2DE approach (95% confidence intervals -27.8 to +60.8) and 0.6 +/- 4.0 ml (short axis; 95% confidence intervals -3.4 to +4.6) as well as 2.1 +/- 9.9 ml (long axis; 95% confidence intervals -7.8 to +12.0) in the 3DE approach (in both cases, the slice thickness was 1 mm). Above a slice thickness of 15 mm, the 95% confidence intervals increased steeply; in the short versus long axes, these were -6.5 to +8.5 versus -7.0 to +10.6 at 15 mm and -10.1 to +15.7 versus -11.3 to +10.9 at 20 mm. The intra-observer variance differed significantly (p < 0.001) only above 15 mm (short axis). Time required for analysis derived by measuring short-axis slice thicknesses of 1, 15, and 25 mm was 58 +/- 16, 7 +/- 2 and 3 +/- 1 min, respectively. The most rational component image analysis for 3DE volumetry in the in vitro model uses short-axis slices with a thickness of 15 mm. Copyright (c) 2005 S. Karger AG, Basel.
机译：三维超声心动图（3DE）与二维超声心动图（2DE）方法相比，提高了左心室（LV）体积的精度，因为可以消除算法中的几何假设。模式精度（短轴平面图）与分析所需的组件图像数量与分析所需的时间的关系仍有待确定。从“顶端”位置（同时2DE和3DE）扫描，模拟异均匀扭曲（动脉瘤）人LV（平均182 +/- 82ml）的十六个乳胶模型。对于3DE容量，将切片厚度变化，短（C型扫描）和长轴（B扫描）在1到25mm之间的5毫米台阶。平均差异（真正 - 超声心动图）在2DE方法中为16.5 +/- 44.3ml（95％置信区间-27.8至+60.8）和0.6 +/- 4.0ml（短轴; 95％置信区间-3.4至+ 4.6）以及2.1 +/- 9.9毫升（长轴; 95％置信区间-7.8至+12.0）在3DE方法中（在这两种情况下，切片厚度为1毫米）。超过15mm的切片厚度，95％的置信区间急剧增加;在短的与长轴的情况下，它们为-6.5至+8.5与-7.0至+10.6，15 mm，-10.1至+15.7与-11.3至+10.9，20 mm。观察者内的方差显着不同（P <0.001）仅高于15毫米（短轴）。通过测量1,15和25mm的短轴切片厚度来源所需的时间分别为58 +/- 16,7 +/- 2和3 +/- 1分钟。体外模型中3DE容量的最合理分量图像分析使用厚度为15mm的短轴切片。版权所有（c）2005年karger AG，巴塞尔。

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