Optimization of the intensity gain of multiple-focus phased-array heating patterns.
Optimization of the intensity gain of multiple-focus phased-array heating patterns.
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DOI：
10.3109/02656739109056461
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
E. Ebbini;C. Cain
中科院分区：
文献类型：
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作者：
E. Ebbini;C. Cain
本文介绍了一种提高多焦斑焦点处光强增益的新技术。新技术被证明是有效的，在减少干扰通常与多焦点图案。这种干涉图案的减少允许多焦点扫描产生高度局部化的加热。仿真结果表明，多焦点扫描不仅提供了一种替代单焦点扫描，但也实现了更好的定位在加热模式。多焦点加热模式的强度增益的最大化显著减少了单焦点扫描可能引起的焦深前高温区域。这是由计算机模拟的二维圆柱形截面阵列（CSA2D）作为加热器。两个系列的模拟中，不同的扫描轨迹被用来治疗加热一个小的深层次的目标体积。在每种情况下，使用单焦点扫描和多焦点扫描（具有和不具有强度增益最大化）生成加热图案。具有增益最大化的多焦点扫描提供了三种方法中对靶体积的最佳加热定位。
A new technique for enhancing the intensity gain at the focal points in multiple-focus patterns is introduced. The new technique is shown to be effective in reducing the interference typically associated with multiple-focus patterns. This reduction in interference patterns allows multiple-focus scanning to generate highly localized heating. Simulation results indicate that multiple-focus scanning not only provides an alternative to single-focus scanning, but also achieves better localization in the heating pattern. The maximization of intensity gain of multiple-focus heating patterns significantly reduces the pre-focal-depth high-temperature regions that can be caused by single-focus scanning. This is shown by computer simulation of a two-dimensional cylindrical-section array (CSA2D) as a heating applicator. Two series of simulations are presented in which different scan trajectories were used to therapeutically heat a small deep-seated target volume. In every case the heating pattern was generated using single-focus scanning and multiple-focus scanning (with and without intensity gain maximization). Multiple-focus scanning with gain maximization offers the best localization of heating to the target volume of the three methods.