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Träfflista för sökning "WFRF:(Berg Stefan) srt2:(1990-1994)"

Sökning: WFRF:(Berg Stefan) > (1990-1994)

  • Resultat 1-10 av 16
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  • Andersson-Engels, Stefan, et al. (författare)
  • Effects of Optical-constants On Time-gated Transillumination of Tissue and Tissue-like Media
  • 1992
  • Ingår i: Journal of Photochemistry and Photobiology, B: Biology. - 1011-1344. ; 16:2, s. 155-167
  • Tidskriftsartikel (refereegranskat)abstract
    • Light transillumination was used to study structures inside turbid media. Time-gated viewing was performed to suppress multiply-scattered light and thus improve spatial resolution. We demonstrate that, for the case of scattering-dominated attenuation (scattering coefficient much greater than the absorption coefficient), the detection of early transmitted light will be practically insensitive to variations in the absorption coefficient. This is an important observation for the development of time-gated optical mammography, since optical mammography using continuous-wave light is based on increased light absorption in the tumour region caused by the neovascularization surrounding a tumour. In order to detect tumours in time-gated viewing it is the scattering coefficient of the tumour that must be characteristic. The scattering coefficient is measured to be lower in the tumour region than in the surrounding breast tissue for one resected breast specimen.
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  • Andersson-Engels, Stefan, et al. (författare)
  • Laser Spectroscopy in Medical Diagnostics
  • 1992
  • Ingår i: Photodynamic Therapy: Basic Principles and Clinical Applications. - 0824786807 ; , s. 387-424
  • Bokkapitel (refereegranskat)
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  • Andersson-Engels, Stefan, et al. (författare)
  • Multispectral Tissue Characterization With Time-resolved Detection of Diffusely Scattered White-light
  • 1993
  • Ingår i: Optics Letters. - 0146-9592. ; 18:20, s. 1697-1699
  • Tidskriftsartikel (refereegranskat)abstract
    • A novel technique for the noninvasive measurement of tissue optical properties simultaneously at all visible and near-infrared wavelengths is presented. The technique is based on.the time-resolved detection of multicolor diffusely scattered light. Short pulses of white light are/produced by using self-phase modulation by focusing the light from a short-pulsed high-power laser into a cuvette filled with water. After spectral dispersion in a polychromator and temporal dispersion in a streak tube, a two-dimensional CCD camera was used as a detector, with one dimension used for time resolution and the other one for wavelength separation.
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  • Berg, Roger, et al. (författare)
  • Time-resolved tranillumination imaging
  • 1993
  • Ingår i: Medical Optical Tomography: Functional Imaging and Monitoring. ; , s. 397-424
  • Bokkapitel (refereegranskat)
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  • Resultat 1-10 av 16

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