Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, United
J Acoust Soc Am. 2019 Jul;146(1):EL78. doi: 10.1121/1.5118238.
Passive acoustic mapping (PAM) techniques offer a simple means of spatio-temporal cavitation monitoring during therapeutic ultrasound procedures. Implementation with a conventional diagnostic ultrasound system allows natural integration of PAM with B-mode imaging. However, the refracting properties of diagnostic array lenses may introduce PAM image registration errors that could lead to inaccuracies in treatment monitoring and guidance. To address these concerns, this paper presents lens characterization of two different array designs, analytical estimation of lens-induced source mapping errors in simple media, and experimental demonstration and correction of lens effects, reducing the depth-averaged image co-registration errors to no more than 0.52 mm.
被动声映射 (PAM) 技术为治疗性超声过程中的时空空化监测提供了一种简单的方法。使用传统的诊断超声系统实现 PAM 允许自然地将 PAM 与 B 模式成像集成。然而，诊断阵列透镜的折射特性可能会引入 PAM 图像配准误差，从而导致治疗监测和引导的不准确。为了解决这些问题，本文对两种不同的阵列设计进行了透镜特性描述，对简单介质中透镜引起的源映射误差进行了分析估计，并对透镜效应进行了实验验证和校正，将深度平均图像配准误差降低到不超过 0.52mm。
