Three-dimensional activation mapping in ventricular muscle: interpolation and approximation of activation times.
Three-dimensional activation mapping in ventricular muscle: interpolation and approximation of activation times.
复制标题
心室肌的三维激活映射：激活时间的插值和近似。
DOI：
10.1114/1.211
复制
发表时间：
1999
影响因子：
3.8
通讯作者：
Lux,RL
中科院分区：
文献类型：
--
作者：
Ni,Q;MacLeod,RS;Lux,RL
插值在分析或可视化任何标量场中起着重要的作用，因为它提供了一种方法来估计测量点之间的场值。一个具体的例子是测量心脏的电活动，无论是在其表面上还是在肌肉内，这是一种被称为心脏标测的技术，广泛用于研究。虽然三维测量心脏领域的多电极针是比较常见的，插值方法来分析这些测量很少被系统地研究。本研究通过将三种三变量技术应用于心脏标测并评估其在未测量位置估计激动时间的准确性来满足这一需求。这些技术是四面体为基础的线性插值，哈代的插值，最小二乘二次近似。测试条件包括高分辨率模拟和犬实验测量的激活时间。所有三种技术在测量间距<2mm时均表现令人满意。在心脏标测中典型的较大电极间间距（1 cm）时，哈代插值证明在统计测量和场细节的定性重建方面均具有上级优势。本文提供了广泛的方法之间的比较和描述的预期误差为每种方法在各种采样间隔和条件。©1999生物医学工程学会. PAC 99：8719Nn，0260 Ed，8719Ff
Interpolation plays an important role in analyzing or visualizing any scalar field because it provides a means to estimate field values between measured sites. A specific example is the measurement of the electrical activity of the heart, either on its surface or within the muscle, a technique known as cardiac mapping, which is widely used in research. While three-dimensional measurement of cardiac fields by means of multielectrode needles is relatively common, the interpolation methods used to analyze these measurements have rarely been studied systematically. The present study addressed this need by applying three trivariate techniques to cardiac mapping and evaluating their accuracy in estimating activation times at unmeasured locations. The techniques were tetrahedron-based linear interpolation, Hardy's interpolation, and least-square quadratic approximation. The test conditions included activation times from both high-resolution simulations and measurements from canine experiments. All three techniques performed satisfactorily at measurement spacing ⩽ 2mm. At the larger interelectrode spacings typical in cardiac mapping (1 cm), Hardy's interpolation proved superior both in terms of statistical measures and qualitative reconstruction of field details. This paper provides extensive comparisons among the methods and descriptions of expected errors for each method at a variety of sampling intervals and conditions. ©1999 Biomedical Engineering Society.PAC99: 8719Nn, 0260Ed, 8719Ff