Focal zone integral and multiple axial scanning based acoustic resolution photoacoustic microscopy with high lateral resolution in-depth.
10.7507/1001-5515.201609072
- Author:
Xiaofei LUO
1
;
Kuan PENG
1
;
Bo WANG
2
;
Tianshuang WANG
1
;
Jiaying XIAO
3
Author Information
1. Department of Biomedical Engineering, School of Basic Medical Science, Central South University, Changsha 410083, P.R.China.
2. College of Biology, Hunan University, Changsha 410082, P.R.China.
3. Department of Biomedical Engineering, School of Basic Medical Science, Central South University, Changsha 410083, P.R.China.maggic_yuan@126.com.
- Publication Type:Journal Article
- Keywords:
acoustic resolution photoacoustic microscopy;
focal zone integral;
lateral resolution;
tumor imaging
- From:
Journal of Biomedical Engineering
2018;35(1):115-122
- CountryChina
- Language:Chinese
-
Abstract:
Acoustic resolution photoacoustic microscopy (ARPAM) combines the advantages of high optical contrast, and high ultrasonic spatial resolution and penetration. However, in photoacoustic microscopy (PAM), the information from deep regions can be greatly affected by the shallow targets, and most importantly, the irreconcilable conflict between the lateral resolution and depth of fields has always be a major factor that limits the imaging quality. In this work, an ARPAM system was developed, in which a non-coaxial arrangement of light illumination and acoustic detection was adopted to alleviate the influence of the tissue surface on the deep targets, and a novel focal zone integral algorithm was applied with multiple axial scanning to improve the lateral resolution. Phantom experiment results show that, the build system can maintain a consistent high lateral resolution of 0.6 mm over a large range in axial direction, which is close to the theoretical calculations. The following tumor imaging results on nude mice indicate that, the proposed method can provide more in-depth information compared with the conventional back detection ARPAM method. With the development of fast repetition lasers and image scanning technologies, the proposed method may play an important role in cerebral vascular imaging, cervical cancer photoacoustic endoscopic detection, and superficial tumor imaging.
