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持续发射超声波:超快超声波成像的新范式
IEEE transactions on bio-medical engineering
|July 26, 2024
概括
持续发射超声成像 (CEUI) 提供了一种新的方法来克服传统脉冲回声回声学的局限性. 这种新方法显著提高了时间分辨率,以更清晰地可视化组织动态.
科学领域:
- 医疗成像医学成像
- 生物医学工程 生物医学工程
- 超声波技术 超声波技术 超声波技术
背景情况:
- 目前的回声学依赖于脉冲回声 (PE) 方法,在成像率和缺失实时现象方面面临局限性.
- 现有的技术在获取过程中难以捕捉组织内的快速动态事件.
研究的目的:
- 引入一个新的范式,持续发射超声波成像 (CEUI),以克服脉冲回声方法的局限性.
- 提高时间分辨率,并在超声波成像中捕捉短,快速的事件.
主要方法:
- 利用介质的连续无声化,使用编码的波形,灵感来自雷达和声纳.
- 采用滑动窗口方法 (SWA) 和脉冲压缩用于回声处理.
- 重建了运动模式 (M模式) 图像,具有高时间分辨率.
主要成果:
- 与超快超声波成像相比,慢时间频率至少提高了两个数量级.
- 显示成像系统的时间分离能力提高了十倍.
- 展示了CEUI在任何采集时刻捕捉短暂和快速事件的能力.
结论:
- 在超声波成像中,CEUI比传统的PE方法有显著的进步.
- 新的范式提供了优越的时间分辨率和对组织动态事件的敏感性.
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