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计算机工程 ›› 2009, Vol. 35 ›› Issue (13): 216-218,. doi: 10.3969/j.issn.1000-3428.2009.13.075

• 图形图像处理 • 上一篇    下一篇

S变换在心肌声学造影图像降噪中的应用

王丽梅1,孙丰荣1,张明强2,李前娜1,姚桂华3,张 运3   

  1. (1. 山东大学信息科学与工程学院,济南 250100;2. 曲阜师范大学物理工程学院,曲阜 273165;3. 山东大学齐鲁医院,济南 250012 )
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-07-05 发布日期:2009-07-05

Application of S Transform in Myocardial Contrast Echocardiograph Image De-noising

WANG Li-mei1, SUN Feng-rong1, ZHANG Ming-qiang2, LI Qian-na1, YAO Gui-hua3, ZHANG Yun3   

  1. (1. School of Information Science and Engineering, Shandong University, Jinan 250100; 2. School of Physical Engineering, Qufu Normal University, Qufu 273165; 3. Qilu Hospital of Shandong University, Jinan 250012)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-07-05 Published:2009-07-05

摘要: 提出一种基于二维S变换的时频滤波方法。S变换融合了短时傅里叶变换和小波变换的优点,适合医学图像处理。该方法在局部频谱利用硬阈值去噪,可用于心肌声学造影图像降噪。降噪实验表明了该方法的有效性和临床应用价值。

关键词: S变换, 时频滤波, 心肌声学造影

Abstract: This paper proposes a time-frequency filtering method based on S transform. S transform inherits the advantages of the wavelet transform and short time Fourier transform. It is suitable for medical image processing. This method uses hard threshold for de-noising in local spectrum, and can be used in image de-noising of the Myocardial Contrast Echocardiography(MCE). Experiment of de-noising demonstrates its validity and clinical application value.

Key words: S transform, time-frequency filtering, Myocardial Contrast Echocardiography(MCE)

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