Reconstruction of embedded absorbers in random media with applications in noninvasive 3D imaging of skin lesions

Prashanth Kini, Atam Dhawan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

An optical backscatter measuring instrument called a Nevoscope is being developed to non- invasively determine 3D characteristics of skin lesions with applications in the diagnosis of malignant melanoma. Optical images are obtained by transilluminating the lesion and imaging backscattered radiation emanating from the skin surface. Such emission profiles contain information about the absorption characteristics of sub-surface structures. It is conceivable that such profiles can be used to reconstruct structural information of inhomogeneities such as mole embedded in the skin. Monte Carlo simulations of photon migration are performed to simulate the radiation pattern of backscattered radiation imaged at the surface of the medium when a light source is placed directly on the surface of the medium. In particular, simulations are performed on media with single embedded absorbers. This is the simplest model of a mole embedded in human skin. Some reconstruction algorithms based on the difference in emission profiles is the presence and absence of the absorber, are tested. A prototype Nevoscope presently being used for visual examination is described. Heuristic reconstruction schemes using images obtained from the Nevoscope are also presented.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages360-371
Number of pages12
Volume1767
ISBN (Print)0819409405
StatePublished - Dec 1 1992
Externally publishedYes
EventInverse Problems in Scattering and Imaging - San Diego, CA, USA
Duration: Jul 20 1992Jul 22 1992

Other

OtherInverse Problems in Scattering and Imaging
CitySan Diego, CA, USA
Period7/20/927/22/92

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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