1. Beam-shifting technique for speckle reduction and flow rate measurement in optical coherence tomography

    Beam-shifting technique for speckle reduction and flow rate measurement in optical coherence tomography

    In this Letter, we propose a beam-shifting optical coherence tomography scheme for speckle reduction and blood flow rate calculation, where variations of the speckle pattern and Doppler angle were generated by parallel shifting of the sample beam incident on the objective lens. The resultant optical coherent tomography images could then be averaged for speckle noise reduction and simultaneously analyzed for flow rate measurement. The performance of the proposed technique was verified by both phantom and in vivo experiments.

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