首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >A study of synthetic-aperture imaging with virtual source elements in B-mode ultrasound imaging systems
【24h】

A study of synthetic-aperture imaging with virtual source elements in B-mode ultrasound imaging systems

机译:B模式超声成像系统中具有虚拟源元素的合成孔径成像的研究

获取原文
获取原文并翻译 | 示例
           

摘要

We propose an all point transmit and receive focusing method based on transmit synthetic focusing combined with receive dynamic focusing in a linear array transducer. In the method, on transmit, a virtual source element is assumed to be located at the transmit focal depth of conventional B-mode imaging systems, and transmit synthetic focusing is used in two half planes, one before and the other after the transmit focal depth, using the RF data of each scanline, together with all other relevant RF scanline data previously stored. The proposed new method uses the same data acquisition scheme as the conventional focusing method while maintaining the same frame rate via high-speed signal processing, but it is not suitable for imaging moving objects. It improves upon the lateral resolution and sidelobe level at all imaging depths. Also, it increases the transmit power and image signal-to-noise ratio (SNR), due to transmit field synthesis, and extends the image penetration depth as well. Evaluations with simulation and experimental data show much improvement in resolution and SNR at all imaging depths.
机译:我们提出了一种在线性阵列换能器中基于发射综合聚焦与接收动态聚焦的全点发射和接收聚焦方法。在该方法中,在发射时,假定虚拟源元素位于常规B模式成像系统的发射焦深处,并且在两个半平面中使用发射合成聚焦,一个在发射焦深之前,另一个在发射焦深之后,使用每个扫描线的RF数据以及先前存储的所有其他相关RF扫描线数据。所提出的新方法使用与常规聚焦方法相同的数据采集方案,同时通过高速信号处理保持相同的帧速率,但是它不适用于对运动对象进行成像。它可在所有成像深度上改善横向分辨率和旁瓣水平。而且,由于发射场合成,它增加了发射功率和图像信噪比(SNR),并且还扩展了图像穿透深度。通过仿真和实验数据进行的评估表明,在所有成像深度下,分辨率和SNR都有很大提高。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号