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Proceedings Paper

TV-controlled laser electro-optic system for iridopuncture
Author(s): Vasyl V. Molebny; Yuri Gubkin; Roman Petrenko; Viacheslav N. Zalessky; Yuri Gorgo; Valentine I. Kozlov
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Paper Abstract

It is a problem of laser eye-microsurgery and a proposed new method of laser iridopuncture to aff ect the predetermined points of an incessantly moving eye. Solving the problem, we aligned a sharp "laser needle" with a TV system and slaved it electrooptically f or being always centred in a tracking window. Preliminary image processing includes histogram normalization resulting in the possibility of a f ixed threshold selection for binary quantization of an image. TV correlation-tracking realizes a minimum absolute diff erence algorithm with the size of a tracking window 16x16 pixels and the field of search 8 pixels greater in orthogonal directions. The laser beam is Bragg-diff racted on a moving sound wave in a Te02 crystal. Frequency synthesizer controls the deflection of a laser beam and operates in the range from 50 to 100 MHz quantized in 0.1 MHz steps. Maximal switch time is 1 ms. Investigations on animals and treatment of human volunteers were made. Patients with tachyarrhythmia, stomac and duodenum ulcer, chronic pancreatitis, gall­ bladder diskinesy, bronchial asthma were included into the experimental group. Laser iridopuncture, acting as a stabilizing factor improving the status of injured membranes of blood cells, giving the normalization of RR­ intervals within the 40%-limits, and a perfect healing of ulcer af ter 10-12 procedures, showed to be a perspective non-invasive method of treatment f or human diseases.

Paper Details

Date Published: 7 July 1993
PDF: 8 pages
Proc. SPIE 1892, Medical Lasers and Systems II, (7 July 1993); doi: 10.1117/12.147502
Show Author Affiliations
Vasyl V. Molebny, Kvant Institute (Ukraine)
Yuri Gubkin, Kvant Institute (Ukraine)
Roman Petrenko, Kvant Institute (Ukraine)
Viacheslav N. Zalessky, Institute of Cardiology (Ukraine)
Yuri Gorgo, Kiev Univ. (Ukraine)
Valentine I. Kozlov, Institute of Laser Medicine (Russia)


Published in SPIE Proceedings Vol. 1892:
Medical Lasers and Systems II
David M. Harris; Carl Murray Penney; Abraham Katzir, Editor(s)

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