Publications by authors named "Alvin Mok"
Article Synopsis
- The study presents a Doppler optical coherence tomography (DOCT) system designed for high-speed imaging, capable of capturing cardiac dynamics in an embryo in vivo with a handheld scanner.
- This system operates at 1.3 µm wavelength and achieves a wide velocity dynamic range and high fidelity imaging by increasing the reference arm scanning rate.
- Using four different display modes, the DOCT effectively detects changes in velocity distribution, measures velocity gradients, and differentiates blood flow signals from cardiac wall movements during heart cycles.
Improvements in real-time Doppler optical coherence tomography (DOCT), acquiring up to 32 frames per second at 250 x 512 pixels per image, are reported using signal processing techniques commonly employed in Doppler ultrasound imaging. The ability to measure a wide range of flow velocities, ranging from less than 20 microm/s to more than 10 cm/s, is demonstrated using an 1.3 microm DOCT system with flow phantoms in steady and pulsatile flow conditions.
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