Synthetic aperture focusing technique for photoacoustic endoscopy

被引：38

作者：

Cai, De ^{[1
]}

Li, Guangyao ^{[1
]}

Xia, Dongqing ^{[1
]}

Li, Zhongfei ^{[1
]}

Guo, Zhendong ^{[1
]}

Chen, Sung-Liang ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Univ Michigan Shanghai Jiao Tong Univ Joint Inst, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 17期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

IN-VIVO; ULTRASONIC ENDOSCOPY; CATHETER; DETECTOR; PROBE;

D O I：

10.1364/OE.25.020162

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photoacoustic endoscopy (PAE) is a promising tool for the detection of atherosclerotic plaque. In this work, we propose a novel design of a side-viewing PAE probe based on a synthetic aperture focusing technique (SAFT) to enable high transverse resolution over large depth of focus (DOF) along the radial direction. A point-like ultrasonic detector is used to ensure a wide detection angle and thus a large synthetic aperture for SAFT. We first perform numerical simulation to optimize the PAE probe design, which involves the placement of the point-like detector and the diameter of a reflection rod mirror. Then, experiments are conducted based on the optimized probe design. High transverse resolution of 115-190 mu m over large DOF of 3.5 mm along the radial direction is experimentally obtained. The SAFT-based PAE holds promise for endoscopic imaging with a high transverse resolution for both the surface and deep regions of tissue. (C) 2017 Optical Society of America

引用

页码：20162 / 20171

页数：10

共 29 条

[1]

Allen T. J., 2015, P SOC PHOTO-OPT INS, V93230

[2] Synthetic Aperture Focusing for a Single-Element Transducer Undergoing Helical Motion [J].