Nonlinear estimation of pressure projection of ultrasound fields in background-oriented schlieren imaging

被引:1
|
作者
Koponen, Eero [1 ]
Leskinen, Jarkko [1 ]
Tarvainen, Tanja [1 ]
Pulkkinen, Aki [1 ]
机构
[1] Univ Eastern Finland, Dept Appl Phys, POB 1627, Kuopio 70211, Finland
基金
欧洲研究理事会; 芬兰科学院;
关键词
SYNTHETIC SCHLIEREN; DENSITY-MEASUREMENTS; VISUALIZATION; TEMPERATURE; HYDROPHONE;
D O I
10.1364/JOSAA.433762
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Background-oriented schlieren imaging is a recently proposed method for measuring projections of ultrasound fields. The method is based on observing deflection of light ina heterogeneous refractive index field that is induced by ultrasound via an acousto-optic effect. The deflection of light manifests as apparent perturbations in an imaged target, forming a potential flow estimation problem. In this work, the potential flow approach is formulated as a nonlinear regularized least-squares approach to alleviate limitations of approaches that linearize the problem. The nonlinear approach is shown to outperform the linear one when estimating projections of medically relevant ultrasound fields. (c) 2022 Optical Society of America
引用
收藏
页码:552 / 562
页数:11
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