1 January 2007 Frequency tracking in optical Doppler tomography using an adaptive notch filter
Author Affiliations +
J. of Biomedical Optics, 12(1), 014018 (2007). doi:10.1117/1.2710240
Optical Doppler tomography is a valuable functional extension of optical coherence tomography (OCT) that can be used to study subsurface blood flows of biological tissues. We propose a novel frequency estimation technique that uses an adaptive notch filter (ANF) to track the depth-resolved Doppler frequency. This new technique is a minimal-parameter filter and works in the time domain without the need of Fourier transformation. Therefore, the algorithm has a computationally efficient structure that may be well suited for implementation in real-time ODT systems. Our simulations and imaging results also demonstrate that this filter has good performance in terms of noise robustness and estimation accuracy compared with existing estimation algorithms.
Yueli Chen, Peter K. Willett, Quing Zhu, "Frequency tracking in optical Doppler tomography using an adaptive notch filter," Journal of Biomedical Optics 12(1), 014018 (1 January 2007). http://dx.doi.org/10.1117/1.2710240

Filtering (signal processing)

Signal to noise ratio

Doppler tomography

Optical coherence tomography

Digital filtering

Detection and tracking algorithms

Signal processing

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