title: Coupling between radiative transport and diffusion approximation for enhanced near-field photon-migration modeling based on transient photon kinetics.
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, fromwhich 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.
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, China.
authors.forename: Mengyu
authors.initials: M
authors.lastname: Jia
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, ChinabTianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China.
authors.forename: Huijuan
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, ChinabTianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Li
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Liu
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, ChinabTianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China.
authors.forename: Limin
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, ChinabTianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China.
authors.forename: Jingying
authors.initials: J
authors.lastname: Jiang
authors.affiliation: Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Tianjin 300072, ChinabTianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
mesh_terms: D003198:Computer Simulation; D004058:Diffusion; D007700:Kinetics; D008956:Models, Chemical; D017785:Photons