使用单元双轴束成形的超声波成像
Nathan Meulenbroek1, Laura Curiel1, Adam Waspe2
1University of Calgary, Department of Biomedical Engineering, Calgary, Alberta, Canada.
Journal of medical imaging (Bellingham, Wash.)
|December 25, 2025
概括
这项研究引入了使用到达方向 (DOA) 信息的新型被动光束成形和声学映射技术,消除了对飞行时间 (TOF) 测量的需求. 这一突破使得更简单,更具成本效益的超声波成像系统成为可能.
科学领域:
- 声学 声学 在声学方面
- 信号处理 信号处理
- 医疗成像医学成像
背景情况:
- 动态聚焦或光束成型对于超声波成像至关重要,传统上依靠传感器阵列和飞行时间 (TOF) 测量.
- 现有的方法需要复杂的传感器阵列来确定声音源的位置.
研究的目的:
- 用单个双轴传感器来演示被动光束成型.
- 为了实现精确的被动声学映射,使用两个双轴传感器,仅使用到达方向 (DOA) 信息.
主要方法:
- 开发了两个单元双轴束成形算法.
- 介绍了四个双轴图像重建算法,用于二元双轴压陶传感器阵列.
- 在声波扫描中进行成像实验,与传统的DSAI和DMSAI算法对比性能.
主要成果:
- 单元双轴光束成型实现了0.36°的中位数DOA误差.
- 只有DOA的图像与二元阵列显示了6.41毫米的中位位置误差.
- DOA + TOF 图像实现了 6.91 毫米的中位点定位误差,并改善了信号噪声比.
结论:
- 首次展示使用静止式压陶的单元梁成型.
- 无TOF信息的被动超声波成像的第一次演示.
- 能够开发出更简单,更小,更具成本效益的被动超声波成像阵列.
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