1Wellman Ctr. for Photomedicine, Massachusetts General Hospital (United States) 2Institute for Medical Engineering & Science, Massachusetts Institute of Technology (United States)
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We present the first feasibility study of a new optical device for assisted venipuncture based on partially-coherent wide-field speckle decorrelation. Using a pseudo-thermal light source, we can vary the degree of spatial coherence, in order to change the ratio of singly- to multiply-scattered light detected by the system. This leads to an improvement in the localization of the decorrelation contrast, and therefore in the delineation of deep veins, as compared to conventional laser speckle imaging (LSI) systems.
The results obtained so far make us believe that our spatial coherence-gated LSI imaging architecture can find widespread application beyond venipuncture.
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Giulia Mansutti, Martin Villiger, Brett E. Bouma, Néstor Uribe-Patarroyo, "Feasibility of partially-coherent wide-field laser speckle-based imaging for deep perfusion visualization in assisted intravenous access," Proc. SPIE PC11974, Biomedical Applications of Light Scattering XII, PC119740C (3 March 2022); https://doi.org/10.1117/12.2610192