Vrba J, Franconi C, Montecchia F, Vannucci I
Electromagnetic Field Department, Technical University of Prague, Czechoslovakia.
IEEE Trans Biomed Eng. 1993 May;40(5):397-407. doi: 10.1109/10.243422.
Evanescent-mode waveguide aperture applicators are proposed for hyperthermic treatments of superficial and subcutaneous tissues. They consist of air-filled waveguide segments which are working below the cutoff frequency, and therefore support only evanescent transverse modes. These are excited by radiators of suitable symmetry and configuration to produce modal heating fields of selected cross-section. This field is emerging from the waveguide active aperture and enters the tissue to be heated through an air gap on non-critical length. These devices work in a very large range of frequencies, and are extremely simple to manufacture even with a variety of cross-section size and shape, on account of their air-filled feature. This enables to obtain good heating field flexibility with improved penetration. Their operation is safe and practical also on irregular and curved tissue surfaces.
提出了用于浅表和皮下组织热疗的倏逝模波导孔径 applicators。它们由工作在截止频率以下的充气波导段组成，因此仅支持倏逝横向模式。这些模式由具有合适对称性和配置的辐射器激发，以产生选定横截面的模式加热场。该场从波导有源孔径中出现，并通过非临界长度的气隙进入待加热组织。这些装置在非常宽的频率范围内工作，并且由于其充气特性，即使具有各种横截面尺寸和形状，制造起来也极其简单。这使得能够在提高穿透性的情况下获得良好的加热场灵活性。它们在不规则和弯曲的组织表面上的操作也是安全且实用的。
