| 超声内窥合成孔径成像技术的研究 |
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| 引用本文： | 郁道银,李明,李妍,汪毅,陈晓冬.超声内窥合成孔径成像技术的研究[J].中国激光,2010(11). |
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| 作者姓名： | 郁道银 李明 李妍 汪毅 陈晓冬 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室; |
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| 基金项目： | 国家863计划(2007AA04Z339); 国家自然科学基金(60827005)资助课题 |
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| 摘 要： | 将广泛应用于雷达系统的合成孔径技术引入超声内窥成像系统,提出一种基于单换能器探头的超声内窥镜合成孔径成像方法。利用单换能器探头的旋转效应,在旋转的不同时刻与位置发射并接收超声回波,等效合成较大的超声发射孔径,以增强超声图像的信噪比与分辨率。分析了单探头合成孔径技术的原理与合成方法,并在此基础上根据超声回波的编码与线性调频特性,完成纵向与横向的脉冲压缩。最后采用中心频率为8 MHz的换能器对猪皮样本进行探测,可分辨出尺寸为0.8 mm×2 mm的目标,系统的信噪比提升了9.38 dB。
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| 关 键 词： | 超声内窥镜 合成孔径 脉冲压缩 编码激励 匹配滤波器 |
Research on Synthetic Aperture Technique for Endoscopic Ultrasound Imaging |
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| Yu Daoyin Li Ming Li Yan Wang Yi Chen Xiaodong.Research on Synthetic Aperture Technique for Endoscopic Ultrasound Imaging[J].Chinese Journal of Lasers,2010(11). |
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| Authors: | Yu Daoyin Li Ming Li Yan Wang Yi Chen Xiaodong |
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| Affiliation: | Yu Daoyin Li Ming Li Yan Wang Yi Chen Xiaodong (Opto-Electronic Information Science and Technology Laboratory,Ministry of Education,College of Precision Instrument & Opto-Electronic Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Synthetic aperture focusing,widely used in radar system,is introduced into endoscopic ultrasound imaging system in this paper.Based on the features of synthetic aperture focusing(SAF),a method of synthetic aperture imaging for ultrasonic endoscope is presented,using the rotation effect of a probe with single transducer,transmitting and receiving the echoes at different time and different locations during the rotation,synthesizing a large transmitting aperture equivalently to enhance the signal to noise rati... |
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| Keywords: | ultrasonic endoscope synthetic aperture pulse compression coded excitation matched filter |
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