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将微波天线通过植入肿瘤内的短疗导管插入体内可以进行空隙加热式癌症疗法。理论计算表明当冷却率大约为每厘米导管长度0.1W时,将会显著改善单个天线或天线阵列的温度分布的径向均匀性。实验与理论计算表明,在一个外径为2.2mm具有可以接近的两端的导管中,如果通过天线和导管间的环形空间的空气速率为10L/min或更少,则可以产生上述的冷却率。若想使沿导管的冷却率保持一致,最好通过将进入导管的空气预先加热30°～40℃
Space-heated cancer therapy can be performed by inserting a microwave antenna into a body through a short-length catheter implanted in the tumor. Theoretical calculations show that when the cooling rate is about 0.1 W per centimeter of catheter length, the radial uniformity of the temperature distribution of a single antenna or antenna array will be significantly improved. Experimental and theoretical calculations show that in a duct having an accessible proximal end with an outer diameter of 2.2 mm, the aforementioned cooling rate can be generated if the air velocity through the annular space between the antenna and the duct is 10 L / min or less. If the cooling rate along the catheter is to be consistent, it is best to preheat the air entering the catheter by 30 ° to 40 ° C