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http://dx.doi.org/10.6109/jkiice.2010.14.4.959

Extraction Method of Ultrasound Spectral Information using Phase-Compensation and Weighted Averaging Techniques  

Kim, Hyung-Suk (광운대학교 전기공학과)
Yi, Joon-Hwan (광운대학교 컴퓨터공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.14, no.4, 2010 , pp. 959-966 More about this Journal
Abstract
Quantitative ultrasound analysis provides fundamental information of various ultrasound parameters using spectral information of the short-gated radiofrequency(RF) data. Therefore, accurate extraction of spectral information from backscattered RF signal is crucial for further analysis of medical ultrasound parameters. In this paper, we propose two techniques for calculating a more accurate power spectrum which are based on the phase-compensation using the normalized cross-correlation to minimize estimation errors due to phase variations, and the weighted averaging technique to maximize the signal-to-noise ratio(SNR). The simulation results demonstrate that the proposed method estimates better results with 10% smaller estimation variances compared to the conventional methods.
Keywords
Ultrasound; Power spectrum extraction; Short-time Fourier transform; Phase-compensation; Weighted average;
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