1. Imaging of human finger nail-fold with MHz A-scan rate swept source optical coherence tomography

    Imaging of human finger nail-fold with MHz A-scan rate swept source optical coherence tomography

    We present a non-invasive three-dimensional depth-resolved micro-structure and micro-vasculature imaging of a human fingernail-fold with a swept-source optical coherence tomography (ssOCT) system at a 1064 nm center wavelength. A phase variance OCT angiography (OCTA) method was implemented for motion contrast OCT imaging. A Fourier-domain mode-locked light source with an A-scan rate of 1.7 MHz (1 700 000 A-scans s −1 ) was utilized for imaging. The experimental setup demonstrates OCT and OCTA imaging with an area of ~5 mm   ×   5 mm (within the Nyquist limit). Details of the ssOCTA system such as system parameters, scanning protocols, acquisition time, challenges, and ...

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