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 frames/s is achieved for imaging of a 6.35 mm diameter inclusion with an absorption coefficient of 0.01 mm^−1 and a reduced scattering coefficient of 1.5 mm^−1 that is moving along a circular path inside a 1% Intralipid solution.
© 2005 Optical Society of America
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.6920) Medical optics and biotechnology : Time-resolved imaging
(170.6960) Medical optics and biotechnology : Tomography
Medical Optics and Biotechnology
Daqing Piao, Shudong Jiang, Subhadra Srinivasan, Hamid Dehghani, and Brian W. Pogue, "Video-rate near-infrared optical tomography using spectrally encoded parallel light delivery," Opt. Lett. 30, 2593-2595 (2005)