Noncontact ultrasound sensing based on Mach-Zehnder homodyne interferometer for photoacoustic imaging

作     者：龙星 胡毅成 王一冰 李长辉 Xing Long;Yicheng Hu;Yibing Wang;Changhui Li

作者机构：Department of Biomedical EngineeringCollege of Future TechnologyPeking UniversityBeijing 100871China National Biomedical Imaging CenterPeking UniversityBeijing 100871China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2024年第22卷第3期

页      面：101-106页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 08[工学] 080202[工学-机械电子工程] 080203[工学-机械设计及理论] 0802[工学-机械工程] 0836[工学-生物工程] 0702[理学-物理学] 

基　　金：supported by the National Key Research and Development Program of China(No.2017YFE0104200) the Beijing Natural Science Foundation(No.JQ18023) the National Natural Science Foundation of China(Nos.81421004 and 61971447) the National Key Instrumentation Development Project of China(No.2013YQ030651) 

主　　题：noncontact ultrasound sensing photoacoustic imaging Mach–Zehnder interferometer 

摘      要：We present a novel noncontact ultrasound(US)and photoacoustic imaging(PAI)system,overcoming the limitations of traditional coupling *** a long coherent length laser,we employ a homodyne free-space Mach-Zehnder setup with zero-crossing triggering,achieving a noise equivalent pressure of 703 Pa at 5 MHz and a-6 dB bandwidth of 1 to8.54 *** address the phase uncertainty inherent in the homodyne *** the noncontact US probe enables photoacoustic computed tomography(PACT).Phantom studies demonstrate imaging performance and system stability,underscoring the potential of our system for noncontact US sensing and PAI.