Babu Varghese

Summary

Affiliation: University of Twente
Country: The Netherlands

Publications

  1. ncbi request reprint Path-length-resolved measurements of multiple scattered photons in static and dynamic turbid media using phase-modulated low-coherence interferometry
    Babu Varghese
    University of Twente, Biomedical Technology Institute, Biophysical Engineering Group, P O Box 217, NL 7500AE Enschede, The Netherlands
    J Biomed Opt 12:024020. 2007
  2. doi request reprint Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurements of diffuse light
    Babu Varghese
    Institute for Biomedical Technology, Biophysical Engineering Group, University of Twente, P O Box 217, NL 7500AE Enschede, The Netherlands
    Rev Sci Instrum 78:126103. 2007
  3. doi request reprint Path-length-resolved optical Doppler perfusion monitoring
    Babu Varghese
    University of Twente, Institute for Biomedical Technology BMTI, Biophysical Engineering Group, Faculty of Science and Technology, P O Box 217, 7500 AE Enschede, The Netherlands
    J Biomed Opt 12:060508. 2007
  4. doi request reprint Influence of tissue optical properties on laser Doppler perfusion imaging, accounting for photon penetration depth and the laser speckle phenomenon
    Vinayakrishnan Rajan
    University of Twente, Institute for Biomedical Technology, Biophysical Engineering Group, P O Box 217, NL 7500AE Enschede, The Netherlands
    J Biomed Opt 13:024001. 2008
  5. doi request reprint Review of methodological developments in laser Doppler flowmetry
    Vinayakrishnan Rajan
    Institute of Biomedical Technology, Biophysical Engineering Group, University of Twente, P O Box 217, 7500AE, Enschede, The Netherlands
    Lasers Med Sci 24:269-83. 2009
  6. doi request reprint Measurement of particle flux in a static matrix with suppressed influence of optical properties, using low coherence interferometry
    Babu Varghese
    MIRA Institute for Biomedical Technology and Technical Medicine, Biophysical Engineering Group, University of Twente, PO Box 217, NL 7500AE Enschede, The Netherlands
    Opt Express 18:2849-57. 2010
  7. doi request reprint In vivo optical path lengths and path length resolved doppler shifts of multiply scattered light
    Babu Varghese
    MIRA Institute for Biomedical Technology and Technical Medicine, Biomedical Photonic Imaging Group, University of Twente, P O Box 217, 7500 AE Enschede, The Netherlands
    Lasers Surg Med 42:692-700. 2010
  8. ncbi request reprint Quantification of spatial intensity correlations and photodetector intensity fluctuations of coherent light reflected from turbid particle suspensions
    Vinayakrishnan Rajan
    Biomedical Technology Institute, Biophysical Engineering Group, University of Twente, P O Box 217, NL 7500AE Enschede, The Netherlands
    Phys Rev E Stat Nonlin Soft Matter Phys 75:060901. 2007

Detail Information

Publications8

  1. ncbi request reprint Path-length-resolved measurements of multiple scattered photons in static and dynamic turbid media using phase-modulated low-coherence interferometry
    Babu Varghese
    University of Twente, Biomedical Technology Institute, Biophysical Engineering Group, P O Box 217, NL 7500AE Enschede, The Netherlands
    J Biomed Opt 12:024020. 2007
    ..Validation of the estimated path length distributions is done by measuring their deformation for increasing absorption and comparing these observations with predictions based on Lambert-Beer's law...
  2. doi request reprint Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurements of diffuse light
    Babu Varghese
    Institute for Biomedical Technology, Biophysical Engineering Group, University of Twente, P O Box 217, NL 7500AE Enschede, The Netherlands
    Rev Sci Instrum 78:126103. 2007
    ..The weighted first moment, which is equal to the average Doppler shift, shows a linear response for different mean flow velocities within the physiological range...
  3. doi request reprint Path-length-resolved optical Doppler perfusion monitoring
    Babu Varghese
    University of Twente, Institute for Biomedical Technology BMTI, Biophysical Engineering Group, Faculty of Science and Technology, P O Box 217, 7500 AE Enschede, The Netherlands
    J Biomed Opt 12:060508. 2007
    ..Perfusion and its variations during occlusion are measured in real time for a given optical path length, and the results are compared with the perfusion signal obtained with a conventional laser Doppler perfusion monitor...
  4. doi request reprint Influence of tissue optical properties on laser Doppler perfusion imaging, accounting for photon penetration depth and the laser speckle phenomenon
    Vinayakrishnan Rajan
    University of Twente, Institute for Biomedical Technology, Biophysical Engineering Group, P O Box 217, NL 7500AE Enschede, The Netherlands
    J Biomed Opt 13:024001. 2008
    ..The results show that the speckle related effects on overall and depth sensitivity are large and that the depth sensitivity is highly likely to be misinterpreted without taking the speckle phenomenon into account...
  5. doi request reprint Review of methodological developments in laser Doppler flowmetry
    Vinayakrishnan Rajan
    Institute of Biomedical Technology, Biophysical Engineering Group, University of Twente, P O Box 217, 7500AE, Enschede, The Netherlands
    Lasers Med Sci 24:269-83. 2009
    ..The theoretical and experimental developments to improve the technique are reviewed. The limitations of the method are elaborated upon, and the research done so far to overcome these limitations is critically assessed...
  6. doi request reprint Measurement of particle flux in a static matrix with suppressed influence of optical properties, using low coherence interferometry
    Babu Varghese
    MIRA Institute for Biomedical Technology and Technical Medicine, Biophysical Engineering Group, University of Twente, PO Box 217, NL 7500AE Enschede, The Netherlands
    Opt Express 18:2849-57. 2010
    ..This approach has potential applications in measuring perfusion independent of the influence of optical properties in the static tissue matrix...
  7. doi request reprint In vivo optical path lengths and path length resolved doppler shifts of multiply scattered light
    Babu Varghese
    MIRA Institute for Biomedical Technology and Technical Medicine, Biomedical Photonic Imaging Group, University of Twente, P O Box 217, 7500 AE Enschede, The Netherlands
    Lasers Surg Med 42:692-700. 2010
    ..The goal of this study is to measure in vivo optical path lengths and path length resolved Doppler shifts and to compare these with conventional laser Doppler perfusion measurements...
  8. ncbi request reprint Quantification of spatial intensity correlations and photodetector intensity fluctuations of coherent light reflected from turbid particle suspensions
    Vinayakrishnan Rajan
    Biomedical Technology Institute, Biophysical Engineering Group, University of Twente, P O Box 217, NL 7500AE Enschede, The Netherlands
    Phys Rev E Stat Nonlin Soft Matter Phys 75:060901. 2007
    ..The provided computational scheme is a step towards correctly interpreting signals obtained from instruments based on the measurement of dynamic speckle patterns in the far field...