前言近几年来,国内外同行对利用微波局部加热治疗肿瘤的技术进行了探索.实验证明,当温度升高到42～45℃时,肿瘤细胞对非电离辐射的敏感性大大提高,于是肿癌组织要比正常组织对辐射更为敏感,它减低了酶的活性,抑制细胞损伤后DNA的修复能力.同对又由于肿瘤组织的脉管相对较少,肿瘤患区的热量很易积累.此外微波对细胞膜的通透性、肿瘤生化、pH值、免疫指标等都产生一定影响,因此微波热疗可以选择性地杀死肿瘤细胞.如果微波热疗和放疗、化疗正确地配合,效果会更好,已引起人们的普遍关注.超短波热疗容易引起脂肪层的过热,所需辐射功率大,范围也难以控制.而在微波频率的高端,由于在组织中穿透深度相应减小,又难以到达深部组织,即使用10厘米波段的微波,有效透深也只有2厘米左右.因此非插入式天线,虽然在使用上是方便的,但是很难将微波功率导入深部组织和限制功率只进入所需要的 Preface In recent years, domestic and foreign counterparts using microwave local heating treatment of cancer technology has been explored.Experiments show that when the temperature rises to 42 ~ 45 ℃, the sensitivity of tumor cells to non-ionizing radiation greatly increased, so the cancer Tissue than the normal tissue is more sensitive to radiation, which reduces the activity of the enzyme, inhibition of cell repair DNA damage the same as the tumor tissue and relatively few vessels, the tumor area of ​​the heat is easy to accumulate.In addition Microwave on cell membrane permeability, tumor biochemistry, pH, immune indicators have a certain impact, so microwave hyperthermia can selectively kill tumor cells.If the microwave hyperthermia and radiotherapy and chemotherapy with the correct, the effect will be even more Good, has aroused widespread concern.Help-wave hyperthermia easily lead to overheating of the fat layer, the required radiation power, the range is difficult to control.At the high end of the microwave frequency, due to the corresponding reduction in the penetration depth in the tissue, but also difficult Reach the deep tissue, even with 10 cm band microwave, the effective depth of only about 2 cm.Therefore, non-intrusive antenna, although easy to use, but it is difficult to microwave power guide Enter the deep tissue and limit the power only to the desired one