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Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (6): 476-480    DOI: 10.1631/jzus.C0910353
    
A new scheme of coded ultrasound using Golay codes
Cheng Jin1,2, Si-ping Chen*,1, Zheng-di Qin1, Tian-fu Wang1
1 School of Medicine, Shenzhen University, Shenzhen 518060, China 2 School of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou 310027, China
A new scheme of coded ultrasound using Golay codes
Cheng Jin1,2, Si-ping Chen*,1, Zheng-di Qin1, Tian-fu Wang1  
1 School of Medicine, Shenzhen University, Shenzhen 518060, China 2 School of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou 310027, China
 全文: PDF(109 KB)  
摘要： Golay codes are the most practical code in coded ultrasound imaging systems. But the trade-off for perfect range sidelobe cancellation is the requirement for two firings, thus resulting in motion-dependent decoding errors. In view of this, we propose a new scheme using the simultaneous emission of code pairs. The code pair is allocated to different elements of an aperture and transmitted simultaneously. The process of separating the code pair from the echo received is based on the orthogonality of the code pair. At last the autocorrelation functions of the individual Golay codes are added together. The simultaneous emission of code pairs instead of two firings recovers the frame rate loss, and eliminates the motion-dependent decoding error. Our theoretical analysis and simulations show that the scheme can be used to eliminate the tissue motion effects.
关键词： Coded ultrasound;  Golay codes;  Tissue motion;  Ultrasonic imaging    
Abstract: Golay codes are the most practical code in coded ultrasound imaging systems. But the trade-off for perfect range sidelobe cancellation is the requirement for two firings, thus resulting in motion-dependent decoding errors. In view of this, we propose a new scheme using the simultaneous emission of code pairs. The code pair is allocated to different elements of an aperture and transmitted simultaneously. The process of separating the code pair from the echo received is based on the orthogonality of the code pair. At last the autocorrelation functions of the individual Golay codes are added together. The simultaneous emission of code pairs instead of two firings recovers the frame rate loss, and eliminates the motion-dependent decoding error. Our theoretical analysis and simulations show that the scheme can be used to eliminate the tissue motion effects.
Key words: Coded ultrasound    Golay codes    Tissue motion    Ultrasonic imaging
收稿日期: 2009-06-15 出版日期: 2010-06-02
CLC:  TH77  
基金资助: Project supported by the National Natural Science Foundation of China (Nos.  60772147  and  60871060),  and  the  Science  and  Technology
Planning Project of Shenzhen City, China (No. JC200903120129A)
通讯作者: Si-ping CHEN     E-mail: chensiping@szu.edu.cn
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Cheng Jin, Si-ping Chen, Zheng-di Qin, Tian-fu Wang. A new scheme of coded ultrasound using Golay codes. Front. Inform. Technol. Electron. Eng., 2010, 11(6): 476-480.

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