基于环形阵列的医学超声成像系统设计
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TH776 TB553

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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


Design of a medical ultrasound imaging system based on a ring array
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    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 / 1 024 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。

    Abstract:

    In order to address the limitations of traditional handheld ultrasound scanning systems, such as narrow field of view, and nonstandardization, 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 / 1 024-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.

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莫笑海,苏 畅,孔 超,蒋乐康,林伟军.基于环形阵列的医学超声成像系统设计[J].仪器仪表学报,2024,45(6):198-207

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  • 在线发布日期: 2024-11-25
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