Frequency tracking in optical Doppler tomography using an adaptive notch filter.
Frequency tracking in optical Doppler tomography using an adaptive notch filter.
复制标题
使用自适应陷波滤波器进行光学多普勒断层扫描的频率跟踪。
DOI：
10.1117/1.2710240
复制
发表时间：
2007
影响因子：
3.5
通讯作者：
Zhu,Quing
中科院分区：
文献类型：
--
作者：
Chen,Yueli;Willett,Peter;Zhu,Quing
光学多普勒层析成像是光学相干层析成像（OCT）的一种有价值的功能扩展，可用于研究生物组织的亚表面血流。我们提出了一种新的频率估计技术，使用自适应陷波滤波器（ANF）跟踪的深度分辨多普勒频率。这种新技术是一种最小参数滤波器，并且工作在时域，而不需要傅立叶变换。因此，该算法具有计算效率高的结构，可以很好地适合于在实时ODT系统中实现。我们的仿真和成像结果也表明，该滤波器具有良好的性能，在噪声鲁棒性和估计精度相比，现有的估计算法。
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.