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Title: High performance time-resolved diffuse optical tomography system
Authors: Mo, W.
Chen, N. 
Keywords: Medical optics instruments
Photo migration
Time-resolved imaging
Issue Date: 2008
Citation: Mo, W., Chen, N. (2008). High performance time-resolved diffuse optical tomography system. Progress in Biomedical Optics and Imaging - Proceedings of SPIE 6849 : -. ScholarBank@NUS Repository.
Abstract: In this paper, we present a high performance time-resolved diffuse optical tomography (DOT) system whose working principle and implementation are very different from the conventional methods and features near real-time data acquisition. Dual-wavelength near-infrared light at 784 nm and 808 nm are used as light source. A high bit rate pseudo-random bit sequence (2.488 GB/s) modulates both continuous lights when they go through the external intensity modulator. The diffuse photon density waves responding to such modulated light are detected by array of high sensitivity, high speed silicon avalanche photodetectors (APD). The temporal point spread function can be retrieved very quickly by using hardware auto-/cross-correlation. Our system implementation has achieved system impulse with rise time approaching 0.5 ns which is highly desirable for time-domain DOT application to penetrate depth in few centimeters. The temporal resolution is mainly limited by the photodetectors. System performance is stabilized with accurate temperature control over key components. Experiment results based on tissue-like phantoms verify our design is potential for breast cancer imaging.
Source Title: Progress in Biomedical Optics and Imaging - Proceedings of SPIE
ISBN: 9780819470249
ISSN: 16057422
DOI: 10.1117/12.761703
Appears in Collections:Staff Publications

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