Laser Research in Cancer in Animals
In the investigation of the effect of the laser in cancer, research has proceeded in orderly stages. First there was basic research on laser radiation of tissue cultures and then the research on cancer in animals, and then the treatment of cancer in man. It must be remembered that unlike cancer research with gamma radiation, laser frequencies of lasers are in the visable and near-visable light ranges. Therefore, the reactions depend upon the optical systems in tissues which accept the laser beam. Studies on impact of the laser on cancers, not only in superficial tissues but also in the subcutaneous or deeper tissues of animals may offer different problems of light reflection, absorption, and transmission than in similar areas of man. The effect of coagulation necrosis induced by the laser may also have a different systemic response in animals than in man. Research with tumors transplanted into animals may also have a different immunologic response from those tumors which arise spontaneously in animals. These are but some of the restriction or limitations which must be considered in analysis of the results of laser treatment of tumors in animals.
KeywordsBurning Welding Cage Adenocarcinoma Helium
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