Bardati F, Borrani A, Gerardino A, Lovisolo G A
Electronic Engineering Dept., Tor Vergata University of Rome, Italy.
IEEE Trans Biomed Eng. 1995 Dec;42(12):1201-7. doi: 10.1109/10.476127.
RF deep hyperthermia systems make use of phased arrays of applicators in order to heat tumors selectively while maintaining healthy tissue at normal temperatures. A new method for the array synthesis is proposed based on the identification of targets to be heated (tumors) and targets to be prevented from excess electromagnetic radiation. The best array feed for each target is found from the solution of the eigenvector problem for a positive definite Hermitian matrix defined for that target. The optimal feed in a global sense then results from a trade-off of the best feeds of individual targets enforced through minimization of an objective function aimed at weighting the distances of the globally optimal feed from the feed vectors optimized for each target separately. An application to the heating of a pelvis is provided as an example.
射频深部热疗系统利用相控阵辐射器，以便在将健康组织保持在正常温度的同时选择性地加热肿瘤。基于对要加热的目标（肿瘤）和要防止受到过量电磁辐射的目标的识别，提出了一种新的阵列合成方法。通过求解为该目标定义的正定埃尔米特矩阵的特征向量问题，找到每个目标的最佳阵列馈电。然后，全局意义上的最优馈电是通过对各个目标的最佳馈电进行权衡得到的，这种权衡是通过最小化一个目标函数来实现的，该目标函数旨在权衡全局最优馈电与为每个目标分别优化的馈电向量之间的距离。作为示例，给出了在骨盆加热中的应用。
