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Title:: Research on the high frame rate imaging model and the effect of sensor aperture weighting on imaging quality

作者:: 邹宝1△ ; 彭虎2; 1.安徽理工大学第一附属医院超声医学科，淮南 230022;2.合肥工业大学仪器科学与光电工程学院，合肥 230009

Author(s):: ZOU Bao1; PENG Hu2; 1.Department of Ultrasound Medicine, First Affiliated Hospital of Anhui University of Science and Technology, Huainan 230022,China; 2.School of Instrument Science and Optoelectronic Engineering, Hefei University of Technology, Hefei 230009,China

Keywords:: Plane wave; Wave number; Sensors; Angular spectrum propagation; Echo signal; Impulse function; Sidelobe

摘要:: 为提高高帧率超声成像系统的成像质量，本研究探讨了高帧率超声成像系统的数学物理模型及提高超声成像质量的途径。首先基于角谱理论研究了一个高帧率成像模型，通过成像模型分析，指出针对发射信号的传感器孔径加权的物理意义，即加权处理决定了声波传播方向，而影响成像质量的原因之一，是在一个发射声场中同时存在不同传播方向的波。通过实验比较了矩形加权和余弦加权对成像质量的影响，验证了本理论分析的正确性。本研究为提高超声成像质量提供了一种新的解决思路，具有较大的参考价值。

Abstract:: In order to improve the imaging quality of high frame rate ultrasound imaging system, we explored the mathematical and physical model for high frame rate ultrasound imaging system and the ways to improve the imaging quality. Firstly, a high frame rate imaging model was established based on the angular spectrum theory. The physical significance of the sensor aperture weighting for the transmitted signal was interpreted through the imaging model analysis. The direction of the sound wave propagation was determined by the weighting process， one of the reasons that affect the imaging quality was the simultaneous existence of different propagation directions in a transmitted sound field. The accuracy of the theoretical analysis was verified through comparing the influence of the rectangular window weighting and cosine window weighting on the imaging quality. This study provides a novel solution for improving the quality of ultrasound imaging and has great reference value.