美国南加利福尼亚大学医学院的研究人员已研究出一种称为“在光中发荧光”法的肺癌早期诊治方法。该法是化学和激光效应的结合。医生将一种血卟啉衍生物(HPD)注入病人身内。HPD具有累积在癌细胞中而被健康细胞逐出的有用特性。当用激光器产生的紫光照射时HPD发荧光,使医生能看到癌组织;当用激光器的红光照射时HPD变成有毒的,能破坏浓集HPD的细胞。他们已采用这种方法发现和治疗气管和支气管的早期肿瘤。以往是借发现痰中的癌细胞来进行肺癌的早期 Researchers at the University of Southern California School of Medicine have developed an early diagnosis and treatment of lung cancer called the “Fluorescence in Light” method. The law is a combination of chemistry and laser effects. Doctors inject a hematoporphyrin derivative (HPD) into the patient. HPDs have useful properties that accumulate in cancer cells and are ejected by healthy cells. The HPD fluoresces when irradiated with the violet light generated by the laser, allowing the physician to see the cancerous tissue; HPD becomes toxic when irradiated with the red laser light and destroys HPD-rich cells. They have used this method to find and treat early tumors of the trachea and bronchi. In the past by detecting sputum in cancer cells to carry out the early stage of lung cancer