Digital signal processor-based real-time optical Doppler tomography system

We present a real-time data-processing and display unit based on a custom-designed digital signal processor (DSP) module for imaging tissue structure and Doppler blood flow. The DSP module is incorporated into a conventional optical coherence tomography system. We also demonstrate the flexibility of...

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Bibliographic Details
Published in:Journal of Biomedical Optics 2004-05, Vol.9 (3), p.454-463
Main Authors: Yan, Shikui, Piao, Daqing, Chen, Yueli, Zhu, Quing
Format: Article
Language:English
Subjects:
Abdomen - blood supply
Abdomen - physiology
Algorithms
Animals
Blood Flow Velocity - physiology
digital signal processor
Equipment Design
Equipment Failure Analysis
Image Enhancement - instrumentation
Image Enhancement - methods
Image Interpretation, Computer-Assisted - instrumentation
Image Interpretation, Computer-Assisted - methods
Laser-Doppler Flowmetry - instrumentation
Laser-Doppler Flowmetry - methods
Online Systems
optical Doppler tomography
Phantoms, Imaging
Rats
Reproducibility of Results
Sensitivity and Specificity
Signal Processing, Computer-Assisted - instrumentation
Tomography, Optical - instrumentation
Tomography, Optical - methods
User-Computer Interface
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Summary:We present a real-time data-processing and display unit based on a custom-designed digital signal processor (DSP) module for imaging tissue structure and Doppler blood flow. The DSP module is incorporated into a conventional optical coherence tomography system. We also demonstrate the flexibility of embedding advanced Doppler processing algorithms in the DSP module. Two advanced velocity estimation algorithms previously introduced by us are incorporated in this DSP module. Experiments on Intralipid flow demonstrate that a pulsatile flow of several hundred pulses per minute can be faithfully captured in M-scan mode by this DSP system. imaging of a rat's abdominal blood flow is also presented. ©
ISSN:1083-3668
1560-2281
DOI:10.1117/1.1695409