Tissue irradiation by conventional medical lasers, i.e., cw ion, Nd:YAG, and CO2, results in vaporization, coagulation necrosis, and carbonization. Histologic examination of tissue irradiated in air characteristically reveals a central crater with concentric zones of thermal and blast injury. Cellular damage adjacent to the crater is much more extensive at high energies.1-4

© 1984 Optical Society of America

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