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Optical imaging using time gated scattered light

  • US 5,919,140 A
  • Filed: 10/27/1995
  • Issued: 07/06/1999
  • Est. Priority Date: 02/21/1995
  • Status: Expired due to Fees
First Claim
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1. A method for detecting material within tissue comprising:

  • irradiating tissue with optical radiation along an optical path, the tissue having material located underneath a surface of the tissue;

    collecting scattered optical radiation from the material including a period of rising intensity and a period of decaying intensity;

    measuring a rising intensity distribution of the collected optical radiation in a time interval between 0 and 1500 picoseconds after irradiation of the tissue;

    comparing the measured rising intensity distribution with a non-diffusion representation of light trajectories in the tissue; and

    determining the location of the material within the tissue from the comparison of the measured rising intensity distribution and the non-diffusion representation.

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