Comparison of four digital maximum frequency estimators for doppler ultrasound

作     者：Y.L.Mo, Larry Yun, Louis C.M. Cobbold, R.S.C. 

作者机构：Institute of Biomedical Engineering University of Toronto Toronto M5S 1A4 Canada 

出 版 物：《Ultrasound in Medicine and Biology》 (Ultrasound Med. Biol.)

年 卷 期：1988年第14卷第5期

页      面：355-363页

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 1002[医学-临床医学] 1010[医学-医学技术（可授医学、理学学位）] 1009[医学-特种医学] 0702[理学-物理学] 10[医学] 

基　　金：Natural Sciences and Engineering Research Council of Canada, NSERC Medical Research Council, MRC 

主　　题：Digital algorithms Doppler ultrasound spectrum Maximum frequency estimation 

摘      要：The performance of four methods for digitally estimating the maximum frequency waveform from the Doppler ultrasound spectrum, are described. The methods investigated are: a percentile method, D Alessio s threshold crossing method [D Alessio T. (1985) Objective algorithm for maximum frequency estimation in Doppler spectral analysers. Med. Biol. Engng and Comput. 23, 63-68.], a modified threshold crossing method, and a new hybrid algorithm. Evaluations of the variance and bias were performed using stationary simulated continuous wave (CW) Doppler signals of different bandwidths and signal/noise ratios (SNR) of 9 and 17 dB. Furthermore, a simulated nonstationary Doppler signal, similar to that from a normal internal carotid artery, was also used to compare the various methods. Overall, it was found that the modified threshold method and the new hybrid method have the best performance over a wide range of signal and noise conditions;however, D Alessio s method also performs well for low SNR s. © 1988.