摘要
超声波束特性直接影响超声图像的清晰度和对比度。二维超声换能器阵列结构与数字声束控制技术相结合,是现代超声成像系统发展的重要方向。以二维平面矩形超声换能器阵列和二维圆环超声换能器阵列为对象,利用仿真实验分别测试了声束聚焦、声束激励、幅度变迹等技术对声束的控制性能。结果表明,灵活的声束控制技术组合可以有效提高二维超声换能器阵列的声束性能,突出声束主瓣,降低旁瓣与栅瓣的影响。
The spatial resolution and contrast of ultrasound image are directly related to the characteristics of ultrasound beam. The modern ultrasound imaging system is significantly promoted by the development of two dimensional array transducer and digital sound-beam control techniques. In this paper, simulation experiments of two-dimensional flat rectangular ultrasound array and two-dimensional annular array were conducted for evaluating sound-beam control techniques, such as sound beam focusing, sound beam steering, aperture apodization, etc.. The results show that flexible combination of sound-beam control techniques can effectively improve beam resolution of two-dimensional ultrasound array transducer, and better beam properties could be received with reduce of the disturbance of side lobes and grating lobes.
出处
《山东科技大学学报（自然科学版）》
CAS
2009年第5期43-48,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
山东科技大学"春蕾计划"项目(2008AZZ065)
关键词
二维超声换能器阵列
声束聚焦
声束激励
幅度变迹
two-dimensional ultrasound array transducer
sound beam focusing
sound beam steering
aperture apodization
