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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 2, Iss. 5 — May. 1, 2011
  • pp: 1169–1183

Modeling hemoglobin at optical frequency using the unconditionally stable fundamental ADI-FDTD method

Ding Yu Heh and Eng Leong Tan  »View Author Affiliations


Biomedical Optics Express, Vol. 2, Issue 5, pp. 1169-1183 (2011)
http://dx.doi.org/10.1364/BOE.2.001169


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Abstract

This paper presents the modeling of hemoglobin at optical frequency (250 nm – 1000 nm) using the unconditionally stable fundamental alternating-direction-implicit finite-difference time-domain (FADI-FDTD) method. An accurate model based on complex conjugate pole-residue pairs is proposed to model the complex permittivity of hemoglobin at optical frequency. Two hemoglobin concentrations at 15 g/dL and 33 g/dL are considered. The model is then incorporated into the FADI-FDTD method for solving electromagnetic problems involving interaction of light with hemoglobin. The computation of transmission and reflection coefficients of a half space hemoglobin medium using the FADI-FDTD validates the accuracy of our model and method. The specific absorption rate (SAR) distribution of human capillary at optical frequency is also shown. While maintaining accuracy, the unconditionally stable FADI-FDTD method exhibits high efficiency in modeling hemoglobin.

© 2011 OSA

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(050.1755) Diffraction and gratings : Computational electromagnetic methods

ToC Category:
Optics of Tissue and Turbid Media

History
Original Manuscript: January 4, 2011
Revised Manuscript: March 18, 2011
Manuscript Accepted: March 22, 2011
Published: April 12, 2011

Citation
Ding Yu Heh and Eng Leong Tan, "Modeling hemoglobin at optical frequency using the unconditionally stable fundamental ADI-FDTD method," Biomed. Opt. Express 2, 1169-1183 (2011)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-2-5-1169


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