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High-speed light source depth estimation using spatially-resolved diffuse imaging.

Authors :
Kieran A Brennan
Daniel A N Kulasingham
Poul M F Nielsen
Andrew J Taberner
Bryan P Ruddy
Source :
Journal of Optics. Jan2019, Vol. 21 Issue 1, p1-1. 1p.
Publication Year :
2019

Abstract

We describe a system for high-speed depth estimation of a light source embedded in a scattering medium. A polynomial model estimates source depth from the spatially-resolved, diffuse reflectance profile measured with a fibre optic probe on the surface of a scattering medium. A dataset of Monte Carlo reflectance profiles is generated over a range of typical optical properties and the model is fit to the simulated reflectance at four detector locations. The model accounts for a source depth up to 15 mm. Cross-validation using the Monte Carlo dataset produced a root mean square error of 0.12 mm. Experimental reflectance data is acquired with the detector probe, which consists of four optical fibres mounted in a black acetal plastic disk. The optical fibres are coupled into avalanche photodiodes for high-speed acquisition of the reflectance profile. When applied to measurements from a tissue-mimicking phantom with an embedded light source, the polynomial model generates depth estimates within 2 mm of the true depth, up to a source depth of 15 mm. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20408978
Volume :
21
Issue :
1
Database :
Academic Search Index
Journal :
Journal of Optics
Publication Type :
Academic Journal
Accession number :
134347516
Full Text :
https://doi.org/10.1088/2040-8986/aaf4db