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Video-rate near-infrared optical tomography using spectrally encoded parallel light delivery

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Abstract

A novel parallel source implementation approach to near-infrared tomography is demonstrated through spectral encoding of the light delivery. This new technique allows many sources to be input into the tissue at the same time, and a high-resolution spectrometer is used to spatially spread out the signals from each spectrally encoded source. The parallel sampling of all sources at all detection locations renders rapid imaging. Acquisition of complete tomographic data sets at a video rate of 35  framess is achieved for imaging of a 6.35 mm diameter inclusion with an absorption coefficient of 0.01mm1 and a reduced scattering coefficient of 1.5mm1 that is moving along a circular path inside a 1% Intralipid solution.

© 2005 Optical Society of America

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