We demonstrate megahertz intravascular Doppler Optical Coherence Tomography (OCT). The OCT system relies on a 1.1 mm diameter motorized catheter and a 1.5 MHz Fourier Domain Mode Locked (FDML) laser. By resolving the phase shift between adjoint A-lines, the flow pattern image can be reconstructed. Imaging experiments were carried out in swine coronary artery in vitro at a speed of 600 frames/s. The MHz sweep rate not only allows us to investigate flow velocity of up to 37.5 cm/s without phase-unwrapping, but also enables dynamic flow imaging at high frame rate.
|Number of pages||6|
|Journal||Progress in Biomedical Optics and Imaging - Proceedings of SPIE|
|Publication status||Published - 2019|
|Event||Diagnostic and Therapeutic Applications of Light in Cardiology 2019 - San Francisco, United States|
Duration: 2 Feb 2019 → 3 Feb 2019