title: Nonperturbative retrieval of the scattering strength in one-dimensional media.
abstract: We examine several approaches on how to use the transmission and reflection amplitudes as functions of the modulation frequency of the laser's intensity to reconstruct the position-dependent scattering coefficient for a simple turbid medium. We explore the region where the contrast between the coefficient and its spatially averaged value is large enough such that perturbative methods fail. We show that in the case of a transillumination geometry, the knowledge of the transmission profile alone is not sufficient for unique image reconstruction, whereas the reflection spectrum allows for a complete inversion. We demonstrate the invertibility for media sampled at only a few positions.
authors.affiliation: Intense Laser Physics Theory Unit, and Department of Physics, Illinois State University, Normal, Illinois 61790-4560, USA.
authors.forename: K D
authors.initials: KD
authors.lastname: Lamb
authors.forename: S
authors.initials: S
authors.lastname: Menon
authors.forename: Q
authors.initials: Q
authors.lastname: Su
authors.forename: R
authors.initials: R
authors.lastname: Grobe
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004574:Electromagnetic Fields; D008954:Models, Biological; D008956:Models, Chemical; D009391:Nephelometry and Turbidimetry / Q000379:methods*; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012542:Scattering, Radiation