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|Title:||Design of an advanced time-domain diffuse optical tomography system|
Optical time-domain reflectometry
|Citation:||Mo, W., Chen, N. (2010-05). Design of an advanced time-domain diffuse optical tomography system. IEEE Journal on Selected Topics in Quantum Electronics 16 (3) : 581-587. ScholarBank@NUS Repository. https://doi.org/10.1109/JSTQE.2009.2031617|
|Abstract:||This paper describes the design of an improved multichannel time-domain diffuse optical tomography (TD-DOT) system. For the spread spectrum TD-DOT, the image quality depends on the stability of the time-resolved signals, which can be affected by fluctuation in the source modulation depth and drift in the detector gain. A microcontroller-based bias controller is designed to lock the bias of a MachZehnder intensity modulator at the positive quadrature point. With additional temperature stabilization over the avalanche photodiodes, the temporal stability of the time-resolved signals has been significantly improved - the fluctuations of the temporal point spread function have been limited to ±2% for a testing period of a few hours. The image quality and reproducibility have been substantially improved with the stabilized signals. © 2006 IEEE.|
|Source Title:||IEEE Journal on Selected Topics in Quantum Electronics|
|Appears in Collections:||Staff Publications|
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