Kato H, Ishida T
J Microw Power. 1983 Dec;18(4):331-6. doi: 10.1080/16070658.1983.11689339.
We have designed a new type of applicator for inductive heating which consists of a one-turn, square, column-like coil, through which RF current flows. The material to be heated is placed alongside one of the external sides of the coil. The depth of penetration from an applicator with a height of 20 cm, width of 20 cm, depth of 60 cm was calculated to be 11.7 cm. However, in experiments using a muscle-equivalent agar phantom 60 cm X 60 cm X 60 cm, the penetration depth proved to be 9.6 cm; but in another experiment using a smaller phantom 20 cm X 40 cm X 60 cm, the penetration depth was 6.3 cm. This means that the depth of penetration depends not only on the size of the applicator but also on the shape of the material heated. Our study clearly showed that this applicator produces much less heat in the fat layer than in the muscle layer and should be an inductive applicator suitable for deep heating cancer therapy.
我们设计了一种新型的感应加热施加器，它由一个单匝的方形柱状线圈组成，射频电流通过该线圈。待加热的材料放置在线圈外侧的其中一侧旁边。对于一个高度为20厘米、宽度为20厘米、深度为60厘米的施加器，计算得出的穿透深度为11.7厘米。然而，在使用尺寸为60厘米×60厘米×60厘米的肌肉等效琼脂模型进行的实验中，穿透深度为9.6厘米；但在另一个使用较小模型20厘米×40厘米×60厘米的实验中，穿透深度为6.3厘米。这意味着穿透深度不仅取决于施加器的尺寸，还取决于被加热材料的形状。我们的研究清楚地表明，这种施加器在脂肪层产生的热量比在肌肉层少得多，应该是一种适用于深部加热癌症治疗的感应施加器。
