基于环形阵列的医学超声成像系统设计  

Design of a medical ultrasound imaging system based on a ring array

作　　者：莫笑海 苏畅[1,2] 孔超 蒋乐康[1,2] 林伟军 Mo Xiaohai;Su Chang;Kong Chao;Jiang Lekang;Lin Weijun(Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《仪器仪表学报》2024年第6期198-207,共10页Chinese Journal of Scientific Instrument

基　　金：国家重点研发计划(2023YFC2410803);中国科学院声学研究所自主部署的目标导向项目(MBDX202113)资助。

摘　　要：针对传统手持式医学超声扫描成像视野狭窄、非标准化等问题,设计并实现了一套基于环形阵列的超声成像系统,包括512阵元超声环形阵列、256/1024通道超声采集电路、基于PCIe总线的数据传输模块以及相应的采集控制和快速成像软件。多通道采集电路由8个32/128超声收发控制模块组成,可控制512个环阵阵元在12 s内完成全矩阵数据采集和高速传输,实测数据传输效率达1.2 Gb/s。系统具备0.16~15 MHz的频带宽度,以及12.5~100 MHz 4档可调的A/D采样率,有利于适配更广泛的临床和实验需要。采集控制软件可设置多模式超声数据采集,实现快速成像监测和全矩阵数据存储,用于后续的图像精细重建。仿组织体模和活体成像实验表明,系统成像范围大于10 cm×10 cm,能够分辨1 mm的异常,可准确重建生物组织中脂肪、肌肉、骨组织等界面,验证了该系统可以实现大视野的标准化医学超声影像。In order to address the limitations of traditional handheld ultrasound scanning systems,such as narrow field of view,and non-standardization,this article presents the design and implementation of comprehensive ultrasound imaging system based on a ring array.This system encompasses a 512-element ultrasonic annular array,a high-performance 256/1024-channel acquisition circuit,an efficient PCIe-based data transmission module,and comprehensive software for acquisition control and rapid imaging.The multi-channel acquisition circuit comprising eight 32/128 ultrasonic transceiver control modules enables full-matrix data acquisition and high-speed transmission of 512 annular array elements within 12 seconds,achieving a remarkable data transmission efficiency of 1.2 Gb/s.The system boasts a broadband frequency range of 0.16~15 MHz and adjustable A/D sampling rates ranging from 12.5~100 MHz,which meets the diverse requirements of clinical and experimental applications.The acquisition control software facilitates multi-mode ultrasound data acquisition,enabling the rapid imaging monitoring and secure storage of full-matrix data for subsequent precise image reconstruction.Phantom and in-vivo experiments show that the system can obtain an imaging range exceeding 10 cm×10 cm,resolve 1 mm abnormalities accurately,and provide detailed visualization of interfaces within biological tissues such as fat,muscle,and bone.These results demonstrate the system′s capability of performing circumferential scanning,producing comprehensive and standardized medical ultrasound images with a wide field of view.

关 键 词：医学超声 超声成像系统 环阵换能器 数据采集系统 

分 类 号：TH776[机械工程—仪器科学与技术] TB553[机械工程—精密仪器及机械]