Abstract
The irradiation effect for cadaver aorticwall athroma was studied using Q switched Nd: YAG laser pulse. Laser pulses were irradiated with repetition frequencies of 500-10KHz and maximum energy density of 80mJ/mm2 per pulse. The results were compared with those of CW irradiation (max. power 10w). Laser energy was emitted to the tissues within saline with contact condition. The evaporation of tissues with smaller thermal damage in peripheral region was observed for pulse irradiations compared with CW irradiation. Several conjunctures were proposed for the mechanism. The new type of quartz fiber at the end of which a specially designed lens-tip was welded,was prepared and the irradiation effect was discussed.
