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Keywords:

  • finite-difference time-domain (FDTD) method;
  • light scattering;
  • cytometry;
  • gold nanoparticle;
  • optical phase contrast microscopy;
  • refractive index matching;
  • image contrast enhancement;
  • nanoscale cell imaging

Abstract

The formulation of the finite-difference time-domain (FDTD) approach is presented in the framework of its potential applications to in-vivo flow cytometry based on light scattering. The consideration is focused on comparison of light scattering by a single biological cell alone in controlled refractive-index matching conditions and by cells labeled by gold nanoparticles. The optical schematics including phase contrast (OPCM) microscopy as a prospective modality for in-vivo flow cytometry is also analyzed. The validation of the FDTD approach for the simulation of flow cytometry may open up a new avenue in the development of advanced cytometric techniques based on scattering effects from nanoscale targets. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)