Air cooling for an interstitial microwave hyperthermia antenna: theory and experiment.
Air cooling for an interstitial microwave hyperthermia antenna: theory and experiment.
复制标题
间隙微波热疗天线的空气冷却：理论与实验。
DOI：
10.1109/10.81564
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Richter,HJ
中科院分区：
文献类型：
--
作者：
Eppert,V;Trembly,BS;Richter,HJ
微波天线通过植入肿瘤的近距离放射治疗导管插入，以提供间质热疗癌症治疗。理论计算表明，0.1 W/cm导管长度的数量级上的冷却速率将显着改善单个天线或阵列的温度分布的径向均匀性。实验和理论计算表明，以10 L/min或更低的速度通过水循环微波消融针和导管之间的环形空间的空气将在两端均可进入的2.2 mm OD导管中产生这样的冷却速率。为了保持冷却速率沿着导管的均匀性，通过将进入导管的空气预热到30-40 ℃来控制冷却速率比控制室温空气的流速更好。天线馈线的欧姆加热不会显著混淆空气冷却作用。<>
Microwave antennas are inserted through brachytherapy catheters implanted in a tumor to deliver interstitial hyperthermia cancer therapy. Theoretical calculations show that a cooling rate on the order of 0.1 W/cm length of catheter will significantly improve the radial uniformity of the temperature distribution of single antennas or arrays. Experiments and theoretical calculations show that air passing through the annulus between the antenna and the catheter at 10 L/min or less will produce such a cooling rate in a 2.2-mm OD catheter that has both ends accessible. To maintain uniformity of cooling rate along the catheter, it is better to control the cooling rate by preheating the air entering the catheter to 30-40 degrees C than it is to control the flow rate of room-temperature air. Ohmic heating of the antenna feedline does not confound the air cooling action significantly.<>