Kato H, Uchida N, Kasai T, Ishida T
Department of Radiology, Shimane Medical University, Izumo, Japan.
Int J Hyperthermia. 1995 Mar-Apr;11(2):287-94. doi: 10.3109/02656739509022463.
We propose a new type of applicator for hyperthermia namely a Distributed Electrodes Applicator. Many electrodes are fixed on boli below which the patient is placed. A set of RF with optimized amplitudes and phases is supplied to the electrodes so as to minimize the ratio of SAR (specific absorption rate) in the fat layers to that in the central region of the patient. SAR patterns in a heated material were calculated using two-dimensional finite element method, and the results showed that the proposed applicator can heat the deep portions of the patient without excessive heating of the fat layers.
我们提出了一种新型的热疗施药器，即分布式电极施药器。许多电极固定在病人下方放置的身体部位上。向电极提供一组具有优化幅度和相位的射频，以尽量减小脂肪层中比吸收率（SAR）与病人体内中心区域比吸收率的比值。使用二维有限元法计算了加热材料中的比吸收率分布模式，结果表明，所提出的施药器能够在不过度加热脂肪层的情况下加热病人身体的深部区域。
