28 April 2005 Three-element phased arrays to enhance the spatial resolution and achieve depth discrimination in diffuse optical imaging
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Abstract
We present a phased-array approach to diffuse optical imaging that is based on collecting continuous wave (CW) data using multiple sources and/or multiple detectors. The optical signals corresponding to individual source-detector pairs are combined by post processing after assigning individual amplitude and phase factors. Here, we demonstrate the enhancement in spatial resolution and the depth discrimination afforded by three-element linear phased arrays, either as stand alone units or in a 2-D crossed configuration. In this particular example, the (amplitude, phase) factors associated with the three array elements are (1,0), (2,π), (1,0), respectively. Experimental results on tissue like phantoms demonstrate the potential of the proposed source/detector arrays to enhance the performance of diffuse optical imaging.
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Ning Liu, Ning Liu, Angelo Sassaroli, Angelo Sassaroli, Max Zucker, Max Zucker, Sergio Fantini, Sergio Fantini, } "Three-element phased arrays to enhance the spatial resolution and achieve depth discrimination in diffuse optical imaging", Proc. SPIE 5693, Optical Tomography and Spectroscopy of Tissue VI, (28 April 2005); doi: 10.1117/12.588426; https://doi.org/10.1117/12.588426
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