Roos D, Seegenschmiedt M H, Klautke G, Erb J, Sorbe B
Department of Gynaecological Oncology, Orebro Medical Centre, Sweden.
Int J Hyperthermia. 1996 Nov-Dec;12(6):743-56. doi: 10.3109/02656739609027681.
An improved design of a previously described intracavitary microwave hyperthermia applicator is presented. The applicator consists of a coaxial choke antenna designed to be positioned into a perspex obturator. The antenna can be fitted in the obturator in three defined positions depending on the specific clinical situation: the selected median, paramedian or lateral position can each provide differently directed heating patterns. This feature combined with the additional axial variability of the antenna position within the obturator can lead to a highly targeted heating of tumours and a reduced risk of unwanted heating of normal tissues. Various phantom studies were conducted using both liquid and solid phantoms. The saline phantom was used to check the typical action of the choke of the antenna where it was found that the antenna choke is efficiently working resulting in a heating pattern which is dependent of the insertion depth of the antenna. The solid phantom was used to measure the typical specific absorption rate (SAR) distribution of each antenna/obturator configuration.
本文介绍了一种对先前描述的腔内微波热疗施源器的改进设计。该施源器由一个设计用于置于有机玻璃闭孔器内的同轴扼流天线组成。根据具体临床情况，天线可安装在闭孔器的三个特定位置：所选的中位、旁中位或外侧位置均可提供不同方向的加热模式。这一特性与天线在闭孔器内位置的额外轴向可变性相结合，可实现对肿瘤的高度靶向加热，并降低正常组织意外受热的风险。使用液体和固体仿真模型进行了各种仿真研究。盐水仿真模型用于检查天线扼流圈的典型作用，结果发现天线扼流圈工作有效，产生的加热模式取决于天线的插入深度。固体仿真模型用于测量每种天线/闭孔器配置的典型比吸收率（SAR）分布。
