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 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. In vivo imaging of a rat's abdominal blood flow is also presented.
Yan
Shikui
S
Electrical & Computer Engineering Department, University of Connecticut, 371 Fairfield Road U11257, Storrs, CT 06269-2157, USA.
Piao
Daqing
D
Chen
Yueli
Y
Zhu
Quing
Q
D000005:Abdomen / Q000098:blood supply* / Q000502:physiology*; D000465:Algorithms; D000818:Animals; D001783:Blood Flow Velocity / Q000502:physiology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D017078:Laser-Doppler Flowmetry / Q000295:instrumentation* / Q000379:methods; D009862:Online Systems; D019047:Phantoms, Imaging; D051381:Rats; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D041622:Tomography, Optical / Q000295:instrumentation* / Q000379:methods; D014584:User-Computer Interface