JBO Letters

Coupling between radiative transport and diffusion approximation for enhanced near-field photon-migration modeling based on transient photon kinetics

[+] Author Affiliations
Mengyu Jia, Lingling Liu

Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, China

Huijuan Zhao, Jiao Li, Limin Zhang, Jingying Jiang, Feng Gao

Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, China

Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China

J. Biomed. Opt. 21(5), 050501 (May 05, 2016). doi:10.1117/1.JBO.21.5.050501
History: Received March 5, 2016; Accepted April 14, 2016
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Abstract.  Coupling between transport theory and its diffusion approximation in subdomain-based hybrid models for enhanced description of near-field photon-migration can be computationally complex, or even physically inaccurate. We report on a physically consistent coupling method that links the transport and diffusion physics of the photons according to transient photon kinetics, where distribution of the fully diffusive photons at a transition time is provided by a computation-saving auxiliary time-domain diffusion solution. This serves as a complementary or complete isotropic source of the temporally integrated transport equation over the early stage and the diffusion equation over the late stage, respectively, from which the early and late photodensities can be acquired independently and summed up to achieve steady-state modeling of the whole transport process. The proposed scheme is validated with numerical simulations for a cubic geometry.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Mengyu Jia ; Huijuan Zhao ; Jiao Li ; Lingling Liu ; Limin Zhang, et al.
"Coupling between radiative transport and diffusion approximation for enhanced near-field photon-migration modeling based on transient photon kinetics", J. Biomed. Opt. 21(5), 050501 (May 05, 2016). ; http://dx.doi.org/10.1117/1.JBO.21.5.050501


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