概括
本研究展示了如何通过增加元素大小和使用先进的光束造型器来增加3D超声波成像中的视野 (FOV). 这种方法可以保持图像质量和分辨率,使用更少的元素.
科学领域:
- 医学成像医学成像
- 超声波技术的超声波技术
- 阵列信号处理系统的信号处理.
背景情况:
- 三维 (3D) 超声波在腹部,产科和心血管成像方面具有显著的潜力.
- 目前的超声波矩阵阵列在视野 (FOV) 中面临限制,原因是元素数量很高.
研究的目的:
- 在3D超声波中使用减少元素计数阵列设计来证明增加的FOV.
- 调查使用更大的元素大小来维持图像质量的方法.
主要方法:
- 延迟和总和 (DAS),零减去成像 (NSI),定向一致性因子 (DCF) 和最小方差 (MV) 束形状器的模拟和实验比较.
- 利用电子合来模拟更大的元素尺寸和定位系统来创建一个虚拟的大光圈.
- 在Verasonics 256系统上使用多重复的1024元素矩阵阵列.
主要成果:
- 与DAS相比,K波模拟显示NSI,DCF和MV光束造型器减少了侧叶和缩小了主叶.
- 实验实现了双倍的FOV (合系数为2),同时保持了元素数量.
- NSI光束制造器提供了最佳分辨率,匹配不合的DAS分辨率,合因子高达4.
结论:
- 先进的光束造型器,特别是NSI,可以在3D超声波中保持分辨率,具有更大的元素大小.
- 这种方法可以构建更大的矩阵数组,增加FOV,而不会牺牲图像质量.
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