在被动声学映射中改进了源定位,使用延迟乘法和总和光束成形,几乎增加了光圈开口

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Updated: Jul 20, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

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Published on: February 12, 2014

Che-Chou Shen¹, You-An Chen¹, Hsin-Yu Ku¹

¹Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.

|August 5, 2023

概括

本研究介绍了一种先进的被动声学映射 (PAM) 方法,使用虚拟增强光圈 (DMAS-VA) 的延迟乘和总和方法,在高强度聚焦超声波 (HIFU) 治疗过程中精确定位空洞化源. 这种新技术显著提高了图像分辨率和对比度,同时消除了工件,提高了HIFU治疗监测.

科学领域:

医学物理医学物理
声学成像声学成像
超声波技术超声波技术超声波技术

背景情况:

高强度聚焦超声波 (HIFU) 提供非侵入性治疗应用,如组织切除和血脑屏障打开.
HIFU的有效性依赖于热性亡和声波化引起的机械破坏.
被动声学映射 (PAM) 监测了化,但传统方法 (TEA) 缺乏分辨率,并展示了文物,妨碍了精确的源定位.

研究的目的:

开发和验证一种新的适应性PAM方法,以改善HIFU诱导的空洞化局部化.
为了克服传统的时间曝光声学 (TEA) 算法的局限性,特别是空间分辨率差和X形文物.

主要方法:

提出了一种新的自适应PAM方法,将延迟乘和和 (DMAS) 束形与虚拟增强光圈 (VA) 结合起来.
DMAS-VA涉及将波形大小以p-th根和阶段以L进行缩放,随后进行p-th功率恢复和信号功率积累.
引入了一个DMAS连贯因子 (DCF),以减轻VA方法引入的格叶和文物.

主要成果:

拟议的DMAS-VA方法在模拟和实验中与传统的TEA相比显示出更高的图像分辨率和对比度.
DCF权重有效地消除了可检测的图像工件,包括格子叶和虚假主叶.
改进的PAM技术允许在HIFU过程中更精确地监测和定位化源.

结论:

具有DCF权重的新型DMAS-VA方法代表了HIFU被动声学映射的重大进步.
这种技术提供了无文物,高分辨率的成像,对于准确的洞穴源定位至关重要.
改进的PAM能力提高了基于HIFU的疗法的安全性和有效性.

关键词:

德马斯连贯因子 (DCF) 是一个连贯因子.延迟乘法和总和 (DMAS)高强度聚焦超声波 (HIFU) 是一种高强度聚焦超声波.消极声学映射 (PAM) 是一种被动声学映射.几乎增强了光圈开口.

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