Laser autodyne angioscopy

Eugeni P. Gordov; Michail M. Makogon; Vikentii V. Pekarskii; Vladimir M. Shipulin M.D.

doi:10.1117/12.179914

12 July 1994 Laser autodyne angioscopy

Eugeni P. Gordov, Michail M. Makogon, Vikentii V. Pekarskii, Vladimir M. Shipulin M.D.

Proceedings Volume 2130, Diagnostic and Therapeutic Cardiovascular Interventions IV; (1994) https://doi.org/10.1117/12.179914
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

A novel approach to imagination of inner surface of arteria during performing laser and balloon angioplasty is suggested. To this end the laser light was transmitted via fiber to the zone of interest and radiation diffused by the walls of the vessel was adopted by receiver. Known technique to determine of contours of an object by measuring the time of the laser pulse propagation is unusable due to the small geometrical scales. Using the CW laser and feeding a portion of the backscattered signal power into the laser cavity (this kind of device was referred to as laser autodyne coherent receiver), the authors have been able to measure the object contour with spatial resolution of up to 2 microns. Such resolution and high sensitivity inherent to this technique should allows one to detect early in the development of the atherosclerosis. To obtain the 3D image of the vessel inside surface we offer two methods. In the first case the vessel side is scanned by moving the end of light quid. In the second one multimode laser is used and the image is drawing by scanning the transverse modes of this laser. The vessel side and atherosclerotic plaques have the different reflectivity spectrum and this fact can be used to increase the image contrast. The correct selection of the laser wavelength makes possible to work into the vessel with circulation of the blood. The calculation of laser autodyne intrascope performance and tentative experimental results are presented in this report. The advantages of this method for the angiography are in speed and adequately of control during performing angioplasty.

Citation Download Citation

Eugeni P. Gordov, Michail M. Makogon, Vikentii V. Pekarskii, and Vladimir M. Shipulin M.D. "Laser autodyne angioscopy", Proc. SPIE 2130, Diagnostic and Therapeutic Cardiovascular Interventions IV, (12 July 1994); https://doi.org/10.1117/12.179914

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KEYWORDS

Mirrors

Laser resonators

Resonators

Laser therapeutics

Pulsed laser operation

Receivers

Reflection

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