Nittka M, Haase A
Physikalisches Institut, Experimentelle Physik V, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
MAGMA. 2000 Jun;10(2):122-30. doi: 10.1007/BF02601847.
In this study we present a method to simulate complex phased array coil designs for cardiac imaging. It is based on the combination of numerically calculated B(1) field vectors for each coil of the array and a noise resistance data set, which is acquired only once with a set of test coils. This technique allowed fast assessment of the SNR performance of arbitrary geometries of single coils to be used as building blocks in complex array configurations. In addition, since clinical scanners usually provide only four receiver channels, we used this method to investigate the use of hardware combiners for different array configurations, consisting of up to eight coils. Simulated array geometries resulted in up to approximately 30% gain in SNR for deep cardiac structures, compared to a conventional linear four coil array. This was confirmed by phantom experiments with implemented coils.
在本研究中，我们提出了一种用于模拟心脏成像复杂相控阵线圈设计的方法。该方法基于对阵列中每个线圈的数值计算B(1)场矢量与一个噪声电阻数据集的组合，该噪声电阻数据集仅使用一组测试线圈采集一次。这项技术能够快速评估用作复杂阵列配置构建模块的单个线圈任意几何形状的信噪比性能。此外，由于临床扫描仪通常仅提供四个接收通道，我们使用该方法研究了由多达八个线圈组成的不同阵列配置的硬件组合器的使用情况。与传统的线性四线圈阵列相比，模拟的阵列几何形状使深部心脏结构的信噪比提高了约30%。这通过使用已实现的线圈进行的体模实验得到了证实。
