Abstract
This article aims to review the panoply of techniques for realising
optical imaging through turbid media such as biological tissue. It
begins by briefly discussing optical scattering and outlines the
various approaches that have been developed to image through scattering
media including spatial filtering, time-gated imaging and coherence-based
techniques. The discussion includes scanning and wide-field techniques
and concentrates on techniques to discriminate in favour of unscattered
ballistic light although imaging with scattered light is briefly
reviewed. Wide-field coherence-gated imaging techniques are discussed
in some detail with particular emphasis placed on techniques to achieve
real-time high-resolution three-dimensional imaging including through
turbid media, providing rapid whole-field acquisition and high depth
and transverse spatial resolution images.
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