Accession Number : ADA327141

Title :   Early Detection of Breast Cancer and Recurrence Using Near Infrared Time Resolved Spectrophotometry.

Descriptive Note : Final rept. 15 Mar 93-14 Feb 97,

Corporate Author : PENNSYLVANIA UNIV PHILADELPHIA

Personal Author(s) : Solin, Lawrence J. ; Chance, Britton ; Orel, Susan

PDF Url : ADA327141

Report Date : MAR 1997

Pagination or Media Count : 36

Abstract : The techniques are employed to measure the optical absorption and scattering factors of breast tissue: (1) A pulse time device in which light at a low power is employed. The time delay in light propagation from the input to output of fiber optic couplers is related to the scattering factor and the rate of decay of emerging photons is related to the absorption factor. (2) Phase modulation, which is more convenient and rapid, measures the phase shift of a high frequency oscillating light of approximately the same power and wavelength used in the pulse time method.

Descriptors :   *DETECTION, *NEAR INFRARED RADIATION, *SPECTROPHOTOMETRY, *BREAST CANCER, FIBER OPTICS, OPTICAL PROPERTIES, SCATTERING, TISSUES(BIOLOGY), RADIATION ABSORPTION, LIGHT TRANSMISSION, PHOTONS, ABSORPTION, PHASE MODULATION, MAMMARY GLANDS, COUPLERS, PHASE SHIFT, PORPHYRINS.

Subject Categories : Electricity and Magnetism
      Optics
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE