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Proceedings Paper

Computational modeling of laser thrombolysis for stroke treatment
Author(s): Moshe Strauss; Peter A. Amendt; Richard A. London; Duncan J. Maitland; Michael E. Glinsky; Peter M. Celliers; David S. Bailey; David A. Young; Steven L. Jacques
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Paper Abstract

Many aspects of the physical processes involved in a pulsed laser interacting with an occlusion in the intra-cranial vascular system, e.g., a blood clot, are included in the simulation codes LATIS and LATIS3D. Laser light propagation and thermo-mechanical effects on the occlusion can be calculated by these codes. The hydrodynamic response uses a realistic equation of state which includes melting and evaporation. Simple material strength and failure models now included in these codes are required to describe clot breakup. The goal is to ascertain the feasibility of laser thrombolysis, and to help optimize the laser parameters for such therapy. In this paper detailed numerical results for laser interaction with water is considered as an initial model for laser thrombolysis of soft blood clots which have high water content. Three regimes of water response to increasing laser energy are considered: (1) the linear stress pulse, (2) the nonlinear evaporation bubble, and (3) the nonlinear inertial bubble. It is shown that later in time the inertial bubble evolves into a slowly growing cavitation bubble. More physical processes will be added in the near future to better model realistic occlusion-vessel wall geometries.

Paper Details

Date Published: 17 May 1996
PDF: 11 pages
Proc. SPIE 2671, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI, (17 May 1996); doi: 10.1117/12.240007
Show Author Affiliations
Moshe Strauss, Univ. of California/Davis (USA) and Nuclear Research Ctr. (Israel)
Peter A. Amendt, Lawrence Livermore National Lab. (United States)
Richard A. London, Lawrence Livermore National Lab. (United States)
Duncan J. Maitland, Lawrence Livermore National Lab. (United States)
Michael E. Glinsky, Lawrence Livermore National Lab. (United States)
Peter M. Celliers, Lawrence Livermore National Lab. (United States)
David S. Bailey, Lawrence Livermore National Lab. (United States)
David A. Young, Lawrence Livermore National Lab. (United States)
Steven L. Jacques, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)


Published in SPIE Proceedings Vol. 2671:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI
C. Thomas Vangsness; Kenneth Eugene Bartels; Lawrence S. Bass; Graham M. Watson; R. Rox Anderson; R. Rox Anderson; Royice B. Everett; Douglas E. Ott; Reza S. Malek; Rodney A. White; Lloyd P. Tate; Aaron P. Perlmutter, Editor(s)

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