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Spherical microlens elements in laser angioplasty

  • Research, Design, And Technology
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Biomedical Engineering Aims and scope

Conclusions

1. A method was proposed for calculating spherical microlens elements (MLE) attached to the distal end of a light conductor. The method allows calculation of the radius of curvature of the sphere, which reduces to allowable level the likelihood of perforation of blood vessel wall during laser angioplasty. Critical values of the radius of curvature were calculated which correspond to qualitative changes in the light distribution pattern at the output of the MLE.

2. Comparative analysis of various theoretical models of light intensity distribution at the output of the MLE showed the model based on the Monte-Carlo method to be most effective. At short distances not exceeding 5-fold diameter of the MLE, a simplified (bicentric) model provides an acceptable approximation. The bicentric model can be calculated with a simple computer.

3. Experimental study of spatial structure of output radiation of an MLE revealed appropriate correlation theoretical data calculated from the proposed models.

The authors are grateful to N. A. Ryzhov and L. V. Dem'yanchik for valuable collaboration and constructive discussion.

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Authors
  1. G. N. Zmievskoi
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  2. A. N. Bekeshko
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  3. N. V. Rubinskii
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  4. E. V. Kazimir
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  5. Yu. F. Miropol'skii
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Additional information

All-Russian Scientific-Research Institute for Medical Instrument Engineering, Moscow. Translated from Meditsinskaya Tekhnika, No. 1, pp. 25–31, January–February, 1994.

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Zmievskoi, G.N., Bekeshko, A.N., Rubinskii, N.V. et al. Spherical microlens elements in laser angioplasty. Biomed Eng 28, 31–39 (1994). https://doi.org/10.1007/BF00557298

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  • DOI: https://doi.org/10.1007/BF00557298

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