一个1.11mm2的IVUS SoC,具有40MHz的射程平面波传输光束成形
IEEE transactions on biomedical circuits and systems
|June 4, 2024
概括
这项研究引入了一种全新的集成芯片系统 (SoC),用于血管内超声波 (IVUS) 成像导线和微导管. 40MHz平面波传输光束形成SoC增强了信号对噪声比 (SNR) 以改善心血管干预成像.
科学领域:
- 生物医学工程 生物医学工程
- 医疗成像医学成像
- 超声波技术 超声波技术 超声波技术
背景情况:
- 血管内超声波 (IVUS) 成像导管对于心血管干预至关重要.
- 导线和微导管的IVUS设备的小型化面临信号噪声比 (SNR) 挑战,因为高频要求提供足够的分辨率.
- 带有传输束成形的集成系统提供了一个解决方案,以减轻小型IVUS设备中的SNR限制.
研究的目的:
- 介绍第一个实用的,高度集成的芯片上的系统 (SoC),用于IVUS导线和微导管,具有40MHz的平面波传输光束形成.
- 通过开发先进的光束成形SoC来解决小型IVUS设备中的SNR限制.
主要方法:
- 开发了一个集成在SoC上的20通道超声波发射器 (Tx) 和接收器 (Rx) 阵列,与电容微机超声波传感器 (CMUT) 阵列接口.
- 实现的平面波传输光束成形使用电压控制延迟线 (VCDL) 进行可调模拟延迟 (0-10 ns),以产生可调的平面波 (+/-50度) 在40MHz.
- 使用180nm高压 (HV) CMOS工艺制造了SoC,实现了紧的活性面积 (0.3mm x 3.7mm) 和低功耗 (31.3mW在接收模式下).
主要成果:
- 展示了一个高度集成的SoC,能够为小型的IVUS应用提供40MHz平面波传输光束成形.
- 通过VCDL实现了可引导的平面波生成,并通过精确的模拟延迟控制,实现+/-50度的转向范围.
- 通过声学表征和成像实验验证实了SoC的功能和性能,确认其适用于导线和微导管集成.
结论:
- 提出的SoC代表了血管内超声波 (IVUS) 成像技术的重大进步,在小型导线和微导管应用中实现了更高的分辨率和SNR.
- 集成的平面波束成形技术克服了当前小型化IVUS设备的关键局限性,为改善心血管干预铺平了道路.
- 该SoC的紧尺寸,低功耗和经过验证的性能证明了其对下一代IVUS成像系统的实际可行性.
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