[Use of spheric micro lens elements for laser angioplasty].

The molding of laser energy by spherical microlens fiber tips applied to laser angioplasty has been experimentally calculated and investigated. The Monte-Carlo method has been proposed to simplify a calculation procedure. This has reduced the necessary amount of test light rays (250 versus 2100 in the former studies).

[Effect of absorption of laser radiation on the destruction threshold of pathologic tissue in laser angioplasty].

With laser angioplasty the hemoglobin absorbtion effect on the demolishing of the pathological objects was taken into consideration. It was stated that this effect is high for argon lasers (lambda = 0.488 = 0.

[Use of low-intensity laser radiation to improve endoscopic diagnosis].

A possibility to improve endoscopic diagnosis by laser illumination is considered. The fact that the image contrast of the pathologic tissue on the normal tissues background may be increased markedly compared to wideband incoherent illumination is shown. The possible increasing of the contrast by laser illumination of the blue-violet band (0.