A field conjugation method for direct synthesis of hyperthermia phases-array heating patterns
A field conjugation method for direct synthesis of hyperthermia phases-array heating patterns
复制标题
一种直接合成热疗相控阵加热模式的场共轭方法
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
C. Cain
中科院分区：
文献类型：
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作者：
M. Ibbini;C. Cain
研究了一种相控阵列场共轭方法，作为一种直接合成多种用于肿瘤加热的超声场模式的方法。对于几乎任何超声相控阵，该方法允许计算适合于直接合成漫射加热图案的元件驱动幅度和相位分布，而不需要机械或电气扫描。此外，拟议的方法提供了在不同地点同时创建一个以上焦点的可能性，然后可以电子扫描。这一吸引人的特点消除了在高空间峰值时间峰值焦点强度下操作的需要，这是与传统扫描相关的潜在问题，同时实现了所需的加热模式。该方法被应用于两种不同的施加器配置：同心环和正方形n×n阵列。给出了用场共轭方法合成的不同加热模式的计算机模拟结果。讨论了重要的实用设计参数，如阵元的大小和数量。
A phased-array field conjugation method is investigated as a means for synthesizing directly many ultrasound field patterns useful for tumor heating. For virtually any ultrasound phased array, the method permits the computation of element driving amplitude and phase distributions appropriate for synthesizing directly diffuse heating patterns without the need for mechanical or electrical scanning. Moreover, the proposed method offers the possibility of creating simultaneously, at different sites, more than one focus, which can then be scanned electronically. This attractive feature eliminates the need for operating at high spatial-peak temporal-peak focal intensities, a potential problem associated with conventional scanning, while achieving a desired heating pattern. The method is applied to two different applicator configurations: a concentric-ring and a square n*n array. Computer simulations of different heating patterns, synthesized using the field conjugation method, are presented. Important practical design parameters, such as the size and number of the array elements, are discussed.<<ETX>>