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Non-contact photoacoustic spectroscopy for photoablation control

  • US 6,694,173 B1
  • Filed: 11/10/2000
  • Issued: 02/17/2004
  • Est. Priority Date: 11/12/1999
  • Status: Expired due to Fees
First Claim
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1. A guided non-contact tissue ablation method controllably mediated by recognition of distinct tissue composition within a tissue volume, the method comprising:

  • a) impinging multiple pulses of electromagnetic energy onto the tissue to ablate impinged tissue and generate an acoustic pressure wave in response to the electromagnetic energy interacting with the impinged tissue;

    b) non-contactingly sensing the generated acoustic pressure wave to provide a plurality of corresponding signals;

    c) processing the plurality of signals by applying thereto a cluster analysis algorithm to recognize distinct tissue composition.

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