Optical ultrasound sensors for photoacoustic imaging: a narrative review

Quantitative Imaging in Medicine and Surgery

article

Bo Fu¹  Yuan Cheng²  Ce Shang¹  Jing Li¹  Gang Wang²  Chenghong Zhang²  Jingxuan Sun²  Jianguo Ma¹  Xunming Ji⁵  Boqu He¹ 

[1] BUAA-CCMU Advanced Innovation Center for Big Data-Based Precision Medicine, School of Engineering Medicine , Beihang University;School of Instrumentation and Optoelectronic Engineering , Beihang University;Key Laboratory of Big Data-Based Precision Medicine, Ministry of Industry and Information Technology, Interdisciplinary Innovation Institute of Medicine and Engineering , Beihang University;School of Biological Science and Medical Engineering , Beihang University;Neurosurgery Department of Xuanwu Hospital , Capital Medical University

关键词: Optical ultrasound detection;    photoacoustic imaging (PAI);    microring resonator;    Bragg grating;    photoacoustic endoscopy;   

DOI  :  10.21037/qims-21-605

学科分类：外科医学

来源: AME Publications

【 摘 要 】

Optical ultrasound sensors have been increasingly employed in biomedical diagnosis and photoacoustic imaging (PAI) due to high sensitivity and resolution. PAI could visualize the distribution of ultrasound excited by laser pulses in biological tissues. The information of tissues is detected by ultrasound sensors in order to reconstruct structural images. However, traditional ultrasound transducers are made of piezoelectric films that lose sensitivity quadratically with the size reduction. In addition, the influence of electromagnetic interference limits further applications of traditional ultrasound transducers. Therefore, optical ultrasound sensors are developed to overcome these shortcomings. In this review, optical ultrasound sensors are classified into resonant and non-resonant ones in view of physical principles. The principles and basic parameters of sensors are introduced in detail. Moreover, the state of the art of optical ultrasound sensors and applications in PAI are also presented. Furthermore, the merits and drawbacks of sensors based on resonance and non-resonance are discussed in perspectives. We believe this review could provide researchers with a better understanding of the current status of optical ultrasound sensors and biomedical applications.

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