双轴激发和接收方法应用于超声波成像
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|December 19, 2023
概括
双轴方法通过使用直角电场来增强超声成像. 该技术显著改善了用于成像应用的宽带传感器的轴分辨率和信号噪声比.
科学领域:
- 超声波传感器技术 超声波传感器技术
- 压陶的应用
- 医学成像医学成像
背景情况:
- 双轴方法利用压陶中的直角电场进行传输和接收.
- 宽带传感器对于先进的成像应用至关重要.
- 之前的工作确定了声压和脉冲宽对相位差异的正弦响应.
研究的目的:
- 为了证明对宽带传感器的双轴方法的应用.
- 开发和测试一个三元双轴传感器阵列,以实现成像的可行性.
- 评估超声波成像中的双轴方法所带来的性能改善.
主要方法:
- 开发了一个三元双轴传感器阵列.
- 利用有限元分析用于传感器元件建模.
- 进行电气表征以确定最佳驾驶频率 (6.25 MHz) 和相位.
- 通过使用尼龙线对象进行成像测试.
- 在性能评估数据分析期间应用双轴重相.
主要成果:
- 模拟和实验证实了声压和半脉冲宽对相位差异的正弦响应.
- 图像测试显示,双轴再相的显著改善.
- 实现了轴分辨率从4.6mm降至1.3mm的最大降低.
- 与传统驾驶相比,获得的信号噪声比率 (SNR) 从15.2dB提高到24.4dB.
结论:
- 双轴方法对于宽带传感器成像应用是可行的.
- 在数据分析期间的双轴重相显著提高了超声波图像质量.
- 这种方法在超声波成像中为轴分辨率和SNR提供了显著的改进.
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