使用空间连贯性的柔性超声波阵列的形状估计:一项初步研究
Amirhossein Omidvar1, Robert Rohling2, Edmond Cretu3
1School of Biomedical Engineering, University of British Columbia, Vancouver, Canada.
Ultrasonics
|September 29, 2023
概括
使用射频数据的空间连贯性来估计灵活的超声波阵列形状,可以提高图像的准确性. 这种方法为先进的超声波成像应用提供了有前途的解决方案.
科学领域:
- 医疗成像医学成像
- 超声波技术 超声波技术 超声波技术
- 反向问题 逆向问题
背景情况:
- 灵活的超声波阵列比刚性阵列提供了更广泛的视野和更好的分辨率等优势.
- 精确的元素定位对于光束成形和用灵活的阵列进行几何超声波重建至关重要.
- 估计灵活的传感器阵列的形状仍然是一个挑战.
研究的目的:
- 评估空间连贯性在背散射频数据中的使用,以估计灵活的超声波传感器阵列形状.
- 通过模拟和体内实验来验证方法.
主要方法:
- 开发了一个反向问题方法,利用超声波反射散射数据的空间连贯性.
- 使用模拟的柔性阵列评估了该方法.
- 在各种解剖目标和幻影上使用商业刚性传感器阵列进行了盲目的体内实验.
主要成果:
- 模拟数组的形状估计误差低于0.1波长.
- 在体内实验显示平均欧几里德误差低于1.4波长 (中位数为0.58).
- 复杂波形结构相似度指数在模拟中超过99%,在实验中超过96%.
结论:
- 优化空间连贯性是估计未知的符合性超声波阵列形状的有效策略.
- 拟议的方法在模拟和现实世界超声波场景中都显示出高精度.
- 这种技术有可能提高灵活的超声波成像系统的性能和可靠性.
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