Ultrasound imaging is a largely used medical imaging system as it is safe, non-invasive, and capable of real-time imaging. In ultrasound imaging, different beamforming methods are used to obtain the image of the field of view. The image quality largely depends on the type of beamforming used in ultrasound imaging. To make the ultrasound imaging system portable, beamforming system needs to be implemented as compact hardware architecture. Dynamic focusing and adaptive apodization are used in beamforming systems to generate high-quality ultrasound images, however, their implementation into the hardware requires large hardware resource which consumes high power. This paper presents the implementation of a compact receive beamformer architecture using a hardware-efficient dynamic delay calculator, an IEEE single-precision arithmetic based adaptive apodization system architecture and a focusing mechanism. The proposed beamformer provides real-time beamforming output which can be used to display high quality ultrasound images. Field-II toolbox is used to simulate and verify the beamformer output. The proposed beamformer consumes 1370k NAND-2 gate equivalent logic resources in UMC 90 nm CMOS standard cell library.

超声成像是一种广泛使用的医学成像系统，因为它安全、无创且能够实时成像。在超声成像中，使用不同的波束形成方法来获得视场的图像。图像质量在很大程度上取决于超声成像中使用的波束成形类型。为了使超声成像系统便携，波束成形系统需要实现为紧凑的硬件架构。动态聚焦和自适应变迹在波束形成系统中用于生成高质量的超声图像，但是，它们在硬件中的实现需要消耗大量功率的大量硬件资源。本文介绍了使用硬件高效的动态延迟计算器实现紧凑型接收波束成形器架构，基于 IEEE 单精度算法的自适应变迹系统架构和聚焦机制。所提出的波束成形器提供实时波束成形输出，可用于显示高质量的超声图像。Field-II 工具箱用于模拟和验证波束形成器输出。建议的波束成形器消耗 1370UMC 90 nm CMOS 标准单元库中的k NAND-2 门等效逻辑资源。