title: Detection of multiple scattering in optical coherence tomography by speckle correlation of angle-dependent B-scans.
abstract: Angular diversity is a successful speckle-reduction technique in optical coherence tomography (OCT). We employ angle-dependent detection for a different purpose: to distinguish the singly backscattered and multiply scattered signal components. Single backscattering is highly correlated over a large range of detection angles; multiple scattering rapidly decorrelates as the angle is varied. Theoretical justification is provided using a linear-systems description of the OCT imaging process; detection of multiple scattering is corroborated experimentally.
authors.affiliation: Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia.
authors.forename: Timothy R
authors.initials: TR
authors.lastname: Hillman
authors.forename: Andrea
authors.initials: A
authors.lastname: Curatolo
authors.forename: Brendan F
authors.initials: BF
authors.lastname: Kennedy
authors.forename: David D
authors.initials: DD
authors.lastname: Sampson
mesh_terms: D003952:Diagnostic Imaging / Q000379:methods*; D041623:Tomography, Optical Coherence / Q000379:methods*