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局部加温是不增加局灶剂量而增强放疗作用的方法之一,肿瘤受热43℃以上时,引起血循环障碍、郁滞、血管破坏,导致恶性瘤细胞死亡。上颌窦、筛窦和扁桃体,邻近脑、脊髓、视器和神经血管束等,局部过热可引起严重的并发症。作者利用能产生电磁场的加热器,进行局部加温,先用狗做实验,计算加热装置的参数,借助于电子计算机通过外推法把实验结果过渡到临床应用。加热器放置在上颌窦投影处的皮肤,电磁场频率915兆赫,能使直接毗连窦前壁的肿瘤温度达到43±0.5℃,向后深入1.5cm处为41±0.4℃,在
Local warming is one of the methods to enhance the effect of radiotherapy without increasing the focal dose. When the tumor is heated above 43°C, it causes blood circulation disorder, stagnation, and blood vessel destruction, leading to the death of malignant tumor cells. Maxillary sinus, ethmoid sinus and tonsil, adjacent to the brain, spinal cord, optics and neurovascular bundles, etc., local overheating can cause serious complications. The author used a heater capable of generating an electromagnetic field to perform local heating. The dog was used as an experiment to calculate the parameters of the heating device, and the experimental results were transitioned to clinical applications by means of an extrapolation method using an electronic computer. Heater placed on the skin of the maxillary sinus projection, electromagnetic field frequency of 915 MHz, can make the temperature of the tumor directly adjacent to the anterior sinus wall reach 43 ± 0.5 °C, backwards into the 1.5cm at 41 ± 0.4 °C, in