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(iv)激光在癌的诊治方面的功能。这是最令人感兴趣的课题之一。首先,是利用某些癌组织对不同波长激光的选择吸收来杀死或破坏癌组织;其次,利用激光手术刀进行癌的临床外科手术,诸如宫颈癌、胃癌、乳腺癌的切除,都获得较好的效果。激光治癌的最新发展是,用肿瘤亲和性光敏物质进行癌的诊断和治疗。最常用的药物是血卟啉,它具有高浓度、长时间存留在癌细胞内的功能。血卟啉的荧光激发光谱在4000埃附近有一个峰,它的发射光谱则在6300埃及7000埃附近有两个峰。用氪离子激光器进行激发,探测血卟啉的
(iv) The function of laser in the diagnosis and treatment of cancer. This is one of the most interesting topics. First, the use of certain cancerous tissues to selectively absorb different wavelengths of laser to kill or destroy cancer tissue; Second, the use of laser scalpels for clinical cancer surgery, such as cervical cancer, gastric cancer, breast cancer resection, have been more Good results. The latest development of laser cancer treatment is cancer-sensitive photosensitizers for cancer diagnosis and treatment. The most commonly used drug is hematoporphyrin, which has a high concentration of long-term retention in cancer cells. The fluorescence excitation spectrum of hematoporphyrin has a peak near 4000 angstroms, and its emission spectrum has two peaks near 6300 angstroms and about 7000 angstroms. Krypton ion laser excitation, detection of hematoporphyrin