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Updated: May 5, 2026

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通过生物组织层精确聚焦的基于时间逆转的分相阵列超声系统

HaoSheng Xu¹, ShaoHui Yang^2,3,4, Qi Lai¹

¹Department of Radiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.

|September 1, 2025

概括

这项研究开发了一种具有1ns延迟分辨率的64通道超声波相位阵列系统. 该系统使用主动时间逆转和相位补偿有效地纠正软组织的焦点转移.

科学领域:

医疗成像和超声波
电气工程和信号处理

背景情况:

超声波分相阵技术提供了先进的束形能力.
对单个传感器元件的精确控制对于动态聚焦和光束转向至关重要.

研究的目的:

开发一个高分辨率的超声波分相阵列系统.
为多层软组织实施焦点偏移校正技术.

主要方法:

使用基于FPGA的相锁循环设计了一个64通道的系统,用于1ns的延迟分辨率.
系统测试和校准控制的变速箱驱动系统延迟误差在1秒内.
使用主动时间逆转和相位补偿来纠正焦点转移.

主要成果:

该系统展示了精确的相调和驱动能力.
实际延迟误差在1小时内成功维持.
实现了组织诱导焦点转移的有效减少.

结论:

开发的超声波分相阵列系统提供了高精度和有效的焦点偏移校正.
这项技术在复杂的软组织环境中提高了超声波成像性能.

关键词:

延迟解决方案其他产品阶段校准时间逆转方法超声波相位阵列

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相关概念视频

Aliasing

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...