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Proceedings Paper

Study of bone ablation dynamics with sequenced pulses
Author(s): Joseph A. Izatt; Douglas Albagli; Irving Itzkan; Michael S. Feld
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Paper Abstract

The dynamics of the ablation process was investigated in bone using two pulses separated by a variable time delay. In one experiment two sub- threshold 7.5 nsec duration pulses at (lambda) equals 355 nm with pulse separation ranging between 1 ns and 100 msec were used to ablate bone. Crater depths remained approximately constant for pulse separations up to approximately equals 100 nsec, then decreased monotonically in time to zero at 10 msec pulse separation. In another experiment the second pulse was replaced by a 7.5 nsec duration pulse at (lambda) equals 532 nm. The combination of sub-threshold pulses at two different wavelengths also ablated bone with a cutting quality matching that of the more strongly absorbed (lambda) equals 355 nm wavelength. Crater depths from dual wavelength ablation increased with increasing fluence in either contributing pulse. Practical consequences of these experiments are discussed.

Paper Details

Date Published: 1 June 1991
PDF: 7 pages
Proc. SPIE 1427, Laser-Tissue Interaction II, (1 June 1991); doi: 10.1117/12.44094
Show Author Affiliations
Joseph A. Izatt, Massachusetts Institute of Technology (United States)
Douglas Albagli, Massachusetts Institute of Technology (United States)
Irving Itzkan, Massachusetts Institute of Technology (United States)
Michael S. Feld, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1427:
Laser-Tissue Interaction II
Steven L. Jacques, Editor(s)

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