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使用非线性差频超声波信号进行对比成像的紧可编程发射方案

Dong Hun Kim¹, Dong-Hyun Kang², Jun Hong Park³

¹Bionics Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seoul 02791, Republic of Korea.

Medical image analysis

|October 25, 2025

概括

一种新的基于阵列的超声波方法通过使用差频超声波 (dfUS) 来增强弹性对比成像. 与传统方法相比,这种技术可以提高信号噪声比率,灵敏度和对比度.

科学领域:

生物医学工程生物医学工程
声学声学在声学方面
医疗成像医学成像

背景情况:

声波的非线性相互作用产生差异频率信号.
不同频率超声波 (dfUS) 能够实现弹性对比成像.
之前的dfUS方法使用了庞大而复杂的多传感器系统,需要机械方向盘.

研究的目的:

为dfUS成像开发和评估一种新的基于阵列的方法.
克服以前dfUS系统的局限性,使电子方向盘和扫描成为可能.
评估基于数组的dfUS方案的性能.

主要方法:

从商用32x32 2D矩阵阵列中构建了一个64元环阵列.
实现了一个基于数组的方案,用于可定制和可编程的dfUS成像.
获得了传统的线性超声波和dfUS合成和ex vivo幻影的图像.

主要成果:

dfUS成像显示信号与噪声比明显更高 (+14.8dB).
dfUS成像显示比线性超声波增加了灵敏度 (+58.5%) 和对比度 (+74.8 dB).
使用低机械指数,表明可能有更高的传输信号强度.

结论:

拟议的基于阵列的dfUS成像是一种可行的,有利的替代方法.
这种新的方法为弹性图像提供了更好的图像质量和系统效率.
未来的工作可以探索更高的传输信号强度,以增强成像能力.

关键词:

不同频率超声波的不同频率超声波.弹性图像对比成像弹性图像对比成像高声阻抗不匹配的高声阻抗不匹配.可编程传输方案可编程传输方案

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