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Title: Method for detection of dental caries and periodontal disease using optical imaging

A method for detecting the presence of active and inactive caries in teeth and diagnosing periodontal disease uses non-ionizing radiation with techniques for reducing interference from scattered light. A beam of non-ionizing radiation is divided into sample and reference beams. The region to be examined is illuminated by the sample beam, and reflected or transmitted radiation from the sample is recombined with the reference beam to form an interference pattern on a detector. The length of the reference beam path is adjustable, allowing the operator to select the reflected or transmitted sample photons that recombine with the reference photons. Thus radiation scattered by the dental or periodontal tissue can be prevented from obscuring the interference pattern. A series of interference patterns may be generated and interpreted to locate dental caries and periodontal tissue interfaces.
Inventors:
 [1];  [2];  [3]
  1. (Albany, CA)
  2. (Danville, CA)
  3. (San Francisco, CA)
Issue Date:
OSTI Identifier:
870670
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5570182
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
method; detection; dental; caries; periodontal; disease; optical; imaging; detecting; presence; active; inactive; teeth; diagnosing; non-ionizing; radiation; techniques; reducing; interference; scattered; light; beam; divided; sample; reference; beams; region; examined; illuminated; reflected; transmitted; recombined; form; pattern; detector; length; path; adjustable; allowing; operator; select; photons; recombine; tissue; prevented; obscuring; series; patterns; generated; interpreted; locate; interfaces; interference pattern; optical imaging; reference beam; scattered light; ionizing radiation; beam path; sample beam; periodontal disease; reference beams; interference patterns; /356/

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