Speckle Reduction of Echocardiograms via Wavelet Shrinkage of Ultrasonic RF Signals

K. Nakayama, Wataru Oyama, T. Wakabayashi, F. Kimura, S. Tsuruoka, K. Sekioka

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

6 被引用数 (Scopus)

抄録

We propose a new speckle reduction algorithm for clinical echocardiograms. The proposed method employs Wavelet Shrinkage to reduce the noise on an ultrasonic signal. In the wavelet shrinkage, at first, original ultrasonic signal is decomposed into wavelet coefficients by multiresolution decomposition using orthogonal wavelet. A threshold of which objective is suppression of noise component is estimated on the resultant complex wavelet coefficient. Wavelet coefficients corresponding to noise are eliminated by soft-thresholding. The noise reduction by the wavelet shrinkage can remove specific frequency components. In this study, we employed the RI-Spline wavelet that was proposed as a shift-invariant mother wavelet. We conducted experiments using clinical ultrasonic signals to evaluate the noise reduction performance of the proposed method. Ten clinical subjects were used in the experiments. The experimental results show that the algorithm provides superior performance on speckle and noise reduction compared to that of existing speckle reduction method.

本文言語英語
ホスト出版物のタイトル13th International Conference on Biomedical Engineering - ICBME 2008
ページ395-398
ページ数4
DOI
出版ステータス出版済み - 12 1 2009
イベント13th International Conference on Biomedical Engineering, ICBME 2008 - , シンガポール
継続期間: 12 3 200812 6 2008

出版物シリーズ

名前IFMBE Proceedings
23
ISSN(印刷版)1680-0737

その他

その他13th International Conference on Biomedical Engineering, ICBME 2008
国/地域シンガポール
Period12/3/0812/6/08

All Science Journal Classification (ASJC) codes

  • バイオエンジニアリング
  • 生体医工学

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