Vasan Venugopalan

Summary

Affiliation: University of California
Country: USA

Publications

  1. pmc Analysis of single Monte Carlo methods for prediction of reflectance from turbid media
    Michele Martinelli
    Dipartimento di Fisica, Politecnico di Milano, Milan, 20133, Italy
    Opt Express 19:19627-42. 2011
  2. ncbi request reprint Role of laser-induced plasma formation in pulsed cellular microsurgery and micromanipulation
    Vasan Venugopalan
    Department of Chemical Engineering and Materials Science, University of California, Irvine, California 92697 2575, USA
    Phys Rev Lett 88:078103. 2002
  3. pmc Radiative transport in the delta-P1 approximation for semi-infinite turbid media
    InSeok Seo
    Department of Chemical Engineering and Materials Science, University of California, Irvine 92697 2575, USA
    Med Phys 35:681-93. 2008
  4. ncbi request reprint Perturbation and differential Monte Carlo methods for measurement of optical properties in a layered epithelial tissue model
    InSeok Seo
    University of California, Irvine, Department of Chemical Engineering and Materials Science, Irvine, California 92697, USA
    J Biomed Opt 12:014030. 2007
  5. ncbi request reprint Estimating optical properties in layered tissues by use of the Born approximation of the radiative transport equation
    Arnold D Kim
    School of Natural Science, University of California, Merced, P O Box 2039, Merced, California 95344, USA
    Opt Lett 31:1088-90. 2006
  6. pmc Characterization and use of laser-based lysis for cell analysis on-chip
    Hsuan Hong Lai
    Department of Electrical Engineering and Computer Science, University of California, Irvine, CA 92697, USA
    J R Soc Interface 5:S113-21. 2008
  7. pmc Amplitude and phase of tightly focused laser beams in turbid media
    Carole K Hayakawa
    Department of Chemical Engineering and Materials Science, Engineering Tower, University of California, Irvine, California 92697, USA
    Phys Rev Lett 103:043903. 2009
  8. pmc Impact of release dynamics of laser-irradiated polymer micropallets on the viability of selected adherent cells
    Huan Ma
    Department of Chemical Engineering and Materials Science, University of California, 916 Engineering Tower, Irvine, CA 92697 2575, USA
    J R Soc Interface 9:1156-67. 2012
  9. pmc Examination of laser microbeam cell lysis in a PDMS microfluidic channel using time-resolved imaging
    Pedro A Quinto-Su
    Department of Chemical Engineering and Materials Science, University of California, Irvine, CA 92697, USA
    Lab Chip 8:408-14. 2008
  10. ncbi request reprint Mid-IR laser ablation of articular and fibro-cartilage: a wavelength dependence study of thermal injury and crater morphology
    Jong In Youn
    Beckman Laser Institute and Medical Clinic, University of California, Irvine, California 92612, USA
    Lasers Surg Med 38:218-28. 2006

Research Grants

Collaborators

Detail Information

Publications28

  1. pmc Analysis of single Monte Carlo methods for prediction of reflectance from turbid media
    Michele Martinelli
    Dipartimento di Fisica, Politecnico di Milano, Milan, 20133, Italy
    Opt Express 19:19627-42. 2011
    ..This improved implementation for sMC simulation serves as a fast and accurate solver to address both forward and inverse problems and is available for use at http://www.virtualphotonics.org/...
  2. ncbi request reprint Role of laser-induced plasma formation in pulsed cellular microsurgery and micromanipulation
    Vasan Venugopalan
    Department of Chemical Engineering and Materials Science, University of California, Irvine, California 92697 2575, USA
    Phys Rev Lett 88:078103. 2002
    ..We discuss implications of the results for biophysical microirradiation procedures...
  3. pmc Radiative transport in the delta-P1 approximation for semi-infinite turbid media
    InSeok Seo
    Department of Chemical Engineering and Materials Science, University of California, Irvine 92697 2575, USA
    Med Phys 35:681-93. 2008
    ....
  4. ncbi request reprint Perturbation and differential Monte Carlo methods for measurement of optical properties in a layered epithelial tissue model
    InSeok Seo
    University of California, Irvine, Department of Chemical Engineering and Materials Science, Irvine, California 92697, USA
    J Biomed Opt 12:014030. 2007
    ..These results provide some guidance for the design of compact fiber-based probes to determine and isolate optical properties from both epithelial and stromal layers of superficial tissues...
  5. ncbi request reprint Estimating optical properties in layered tissues by use of the Born approximation of the radiative transport equation
    Arnold D Kim
    School of Natural Science, University of California, Merced, P O Box 2039, Merced, California 95344, USA
    Opt Lett 31:1088-90. 2006
    ..We demonstrate the accuracy of this method by using spatially resolved reflectance data computed with Monte Carlo simulations...
  6. pmc Characterization and use of laser-based lysis for cell analysis on-chip
    Hsuan Hong Lai
    Department of Electrical Engineering and Computer Science, University of California, Irvine, CA 92697, USA
    J R Soc Interface 5:S113-21. 2008
    ..The resolution and efficiency of the separation of the cellular analytes are similar to those of standards demonstrating the feasibility of using a pulsed laser microbeam in single-cell analysis...
  7. pmc Amplitude and phase of tightly focused laser beams in turbid media
    Carole K Hayakawa
    Department of Chemical Engineering and Materials Science, Engineering Tower, University of California, Irvine, California 92697, USA
    Phys Rev Lett 103:043903. 2009
    ..This approach for evaluating the formation of the focal volume in turbid media is of direct relevance to the imaging properties of nonlinear coherent microscopy, which rely on both the amplitude and phase of the focused fields...
  8. pmc Impact of release dynamics of laser-irradiated polymer micropallets on the viability of selected adherent cells
    Huan Ma
    Department of Chemical Engineering and Materials Science, University of California, 916 Engineering Tower, Irvine, CA 92697 2575, USA
    J R Soc Interface 9:1156-67. 2012
    ..This provides a quantitative, mechanistic basis for determining optimal operating conditions for laser microbeam-based pallet release systems for the isolation and selection of adherent cells...
  9. pmc Examination of laser microbeam cell lysis in a PDMS microfluidic channel using time-resolved imaging
    Pedro A Quinto-Su
    Department of Chemical Engineering and Materials Science, University of California, Irvine, CA 92697, USA
    Lab Chip 8:408-14. 2008
    ..This capacity of pulsed laser microbeam irradiation to achieve rapid cell lysis in microfluidic channels with minimal dilution of the cellular contents has important implications for their use in lab-on-a-chip applications...
  10. ncbi request reprint Mid-IR laser ablation of articular and fibro-cartilage: a wavelength dependence study of thermal injury and crater morphology
    Jong In Youn
    Beckman Laser Institute and Medical Clinic, University of California, Irvine, California 92612, USA
    Lasers Surg Med 38:218-28. 2006
    ....
  11. ncbi request reprint Use of the delta-P1 approximation for recovery of optical absorption, scattering, and asymmetry coefficients in turbid media
    Carole K Hayakawa
    Department of Biomedical Engineering and the Laser Microbeam and Medical Program, Beckman Laser Institute, University of California Irvine, Irvine, California 92697, USA
    Appl Opt 43:4677-84. 2004
    ..The ability of the delta-P1 model to accurately describe radiative transport within media of arbitrary albedo and on spatial scales comparable to l* is the key element enabling the separation of g1 from micro's...
  12. ncbi request reprint Optoacoustic imaging based on the interferometric measurement of surface displacement
    Stefan A Carp
    University of California, Irvine, Department of Chemical Engineering and Materials Science, Irvine, California 92697 2575, USA
    J Biomed Opt 12:064001. 2007
    ..The images shown demonstrate the ability of our method to provide better than 200-microm lateral and 30-microm axial resolution at depths exceeding ten transport mean free paths in highly scattering in-vitro and in-vivo model systems...
  13. pmc Biophysical response to pulsed laser microbeam-induced cell lysis and molecular delivery
    Amy N Hellman
    Dept of Bioengineering, University of California, San Diego, La Jolla, CA 92093 0412, USA
    J Biophotonics 1:24-35. 2008
    ..Cells exposed to tau(w, max) < 8 +/- 1 kPa remain viable without molecular delivery. These findings provide the first direct correlation between pulsed laser microbeam-induced shear stresses and subsequent cellular outcome...
  14. ncbi request reprint Sampling tissue volumes using frequency-domain photon migration
    Frederic Bevilacqua
    Laser Microbeam and Medical Program, Beckman Laser Institute, 1002 Health Sciences Road East, Irvine, California 92612, USA
    Phys Rev E Stat Nonlin Soft Matter Phys 69:051908. 2004
    ....
  15. ncbi request reprint Laser-induced mixing in microfluidic channels
    Amy N Hellman
    Department of Chemical Engineering and Materials Science, University of California, Irvine, California 92697, USA
    Anal Chem 79:4484-92. 2007
    ..This approach to generate the mixing of adjacent fluids may prove advantageous in many microfluidic applications as it requires neither tailored channel geometries nor the fabrication of specialized on-chip instrumentation...
  16. pmc Hydrodynamic determinants of cell necrosis and molecular delivery produced by pulsed laser microbeam irradiation of adherent cells
    Jonathan L Compton
    Department of Chemical Engineering and Materials Science, University of California, Irvine, Irvine, California Laser Microbeam and Medical Program, Beckman Laser Institute and Medical Clinic, University of California, Irvine, Irvine, California
    Biophys J 105:2221-31. 2013
    ..These results provide a mechanistic foundation and design strategy applicable to a broad range of laser-based cellular manipulation procedures...
  17. pmc Examination of axonal injury and regeneration in micropatterned neuronal culture using pulsed laser microbeam dissection
    Amy N Hellman
    Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
    Lab Chip 10:2083-92. 2010
    ..This integrated use of laser microbeam dissection within a micropatterned cell culture system to produce precise zones of neuronal injury shows potential for high-throughput screening of agents to promote neuronal regeneration...
  18. pmc Mechanisms of pulsed laser microbeam release of SU-8 polymer "micropallets" for the collection and separation of adherent cells
    Pedro A Quinto-Su
    Department of Chemical Engineering and Materials Science, University of California, Irvine, Irvine, California 92697 2575, USA
    Anal Chem 80:4675-9. 2008
    ..Taken together, these results implicate that pallet release accomplished via pulsed laser microbeam irradiation is an energy-driven plasma-mediated ablation process...
  19. pmc Radiative transport produced by oblique illumination of turbid media with collimated beams
    Adam R Gardner
    Department of Chemical Engineering and Materials Science, University of California, Irvine, Irvine, California 92697, USA
    Phys Rev E Stat Nonlin Soft Matter Phys 87:063308. 2013
    ..These solutions are validated using more costly Monte Carlo simulations and reveal important insights regarding the evolution of the radiant field generated by oblique collimated beams spanning ballistic and diffusely scattering regimes...
  20. pmc In vivo multiphoton NADH fluorescence reveals depth-dependent keratinocyte metabolism in human skin
    Mihaela Balu
    Laser Microbeam and Medical Program, Beckman Laser Institute and Medical Clinic, University of California, Irvine, California, USA
    Biophys J 104:258-67. 2013
    ..Based on combined hemodynamic and two-photon excited fluorescence data, the oxygen consumption rate in the stratum basale is estimated to be ∼0.035 μmoles/10(6) cells/h...
  21. pmc Coupled forward-adjoint Monte Carlo simulation of spatial-angular light fields to determine optical sensitivity in turbid media
    Adam R Gardner
    Beckman Laser Institute, Laser Microbeam and Medical Program, 1002 Health Sciences Road, Irvine, California 92697 3010bUniversity of California, Department of Chemical Engineering and Materials Science, 916 Engineering Tower, Irvine, California 92697 2575
    J Biomed Opt 19:065003. 2014
    ..We discuss the value of such computations for optical imaging and the design of optical measurements...
  22. ncbi request reprint Mechanisms of laser cellular microsurgery
    Pedro A Quinto-Su
    Department of Chemical Engineering and Materials Science, University of California, Irvine, California 92697, USA
    Methods Cell Biol 82:113-51. 2007
    ..We relate this understanding of damage mechanisms to laser microbeam applications reported in the literature...
  23. pmc Accurate and efficient Monte Carlo solutions to the radiative transport equation in the spatial frequency domain
    Adam R Gardner
    Department of Chemical Engineering and Materials Science, Laser Microbeam and Medical Program, Beckman Laser Institute, University of California, Irvine, Irvine, California 92697, USA
    Opt Lett 36:2269-71. 2011
    ..Further results for oblique illumination illustrate the potential diagnostic utility of the SFD phase-shifts for analysis of layered media...
  24. ncbi request reprint Radiative transport in the delta-P1 approximation: accuracy of fluence rate and optical penetration depth predictions in turbid semi-infinite media
    Stefan A Carp
    Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA 92697, USA
    J Biomed Opt 9:632-47. 2004
    ..Graphs are provided to indicate the optical and geometrical conditions under which one must replace the delta-P(1) results for planar irradiation with those for Gaussian beam irradiation to maintain accurate dosimetry predictions...
  25. pmc Pulsed laser microbeam-induced cell lysis: time-resolved imaging and analysis of hydrodynamic effects
    Kaustubh R Rau
    Laser Microbeam and Medical Program, Beckman Laser Institute, Department of Biomedical Engineering, University of California, Irvine, California, USA
    Biophys J 91:317-29. 2006
    ..The implications for single cell lysis and microsurgery are discussed...
  26. ncbi request reprint Free electron laser ablation of articular and fibro-cartilage at 2.79, 2.9, 6.1, and 6.45 microm: mass removal studies
    Jong In Youn
    Beckman Laser Institute and Medical Clinic, University of California, Irvine, California 92612, USA
    Lasers Surg Med 36:202-9. 2005
    ..The wavelength and tissue-composition dependence of cartilage ablation was examined using selected mid-infrared laser wavelengths...
  27. ncbi request reprint Mechanisms of pulsed laser ablation of biological tissues
    Alfred Vogel
    Medical Laser Center Lübeck, Peter Monnik Weg 4, D 23562 Lubeck, Germany
    Chem Rev 103:577-644. 2003

Research Grants5

  1. Photon Migration for Measurement of Small Tissue Volumes
    Vasan Venugopalan; Fiscal Year: 2001
    ..abstract_text> ..