用螺旋波频谱方法对凸阵列进行被动声学映射
IEEE transactions on medical imaging
|January 10, 2024
概括
一种新的螺旋波频谱 (HWS) 方法显著加快了使用凸阵列的聚焦超声疗法的被动声学映射 (PAM). 这种高效的技术实现了毫秒级图像重建,用于实时洞穴监测.
科学领域:
- 医疗成像医学成像
- 声学 声学 在声学方面
- 生物医学工程 生物医学工程
背景情况:
- 被动声学映射 (PAM) 对于在聚焦超声疗法中监测腔位至关重要.
- 对于腹部成像,凸阵列是首选的,但当前的PAM方法 (例如,延迟和总和) 是计算密集的,限制了实时应用.
- 现有的方法在较大的视野 (FOV) 和快速图像重建方面扎.
研究的目的:
- 为凸阵列开发一种高效且频率选择性的被动声学映射 (PAM) 方法.
- 提高图像重建速度,以实时监测聚焦超声波疗法中的洞穴.
- 为了能够准确地绘制微气泡 (MB) 化活动及其解剖位置.
主要方法:
- 为PAM提出了螺旋波谱 (HWS) 方法,在圆柱形表面之间投射波谱.
- 实现了HWS方法的并行版本,用于加速图像重建.
- 结合基于HWS的PAM与B模式成像,用于双模式实时可视化.
主要成果:
- 通过HWS方法,图像质量和化源定位精度与延迟和总和 (DAS) 方法相似.
- 与频域 (1级) 和时间域 (2级) DAS相比,实现了时间复杂性的显著降低.
- 实现了毫秒级图像重建速度,并行实现.
- 成功地映射出不同的微气泡 (MB) 化状态 (无,稳定,惯性).
- 在一个肝脏幻影中展示了MB空心的实时双模式成像.
结论:
- HWS方法为凸数组的PAM提供了高效和快速的替代方案,克服了传统DAS方法的局限性.
- 这种技术可以实时监测化活动,这对于推进聚焦超声波疗法至关重要.
- 双模式成像方法为化事件提供了解剖学上下文,提高了临床适用性.
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