Nikita K S, Maratos N, Uzunoglu N K
Department of Electrical Engineering, National Technical University of Athens, Greece.
Int J Hyperthermia. 1992 Jul-Aug;8(4):515-28. doi: 10.3109/02656739209037989.
In order to achieve a desired temperature distribution inside and outside of malignant tissues, optimization techniques could be used in phased array hyperthermia systems to control effectively the amplitude and phase of the radiating elements. The optimization of a four-element phased array hyperthermia system operating at 432 MHz is examined theoretically. The proposed technique is based on a detailed physical model of the tissue medium to be heated in terms of both electromagnetic and thermal properties. A penalty function technique using a Newton method is applied to determine the optimum phases and amplitudes of the array. Several array geometries have been studied and numerical results are presented.
为了在恶性组织内外实现理想的温度分布，可在相控阵热疗系统中使用优化技术，以有效控制辐射元件的幅度和相位。从理论上研究了一个工作在432MHz的四元件相控阵热疗系统的优化问题。所提出的技术基于待加热组织介质在电磁和热特性方面的详细物理模型。应用使用牛顿法的惩罚函数技术来确定阵列的最佳相位和幅度。研究了几种阵列几何结构并给出了数值结果。
