Photoacoustic tomography imaging using a 4f acoustic lens and peak-hold technology.
In this paper we present a new high-contrast photoacoustic tomography (PAT) imaging system using a 4f acoustic lens, a 64-element linear transducer array and peak-hold technology. This PAT imaging system has been developed to obtain three-dimensional (3D) PAT images of experimental samples. By utilizing a 4f acoustic lens, the photoacoustic (PA) signals generated from the sample are directly imaged on the imaging plane and collected by the 64-element linear transducer array, which changes them into the corresponding electronic signals. Then we can get one-dimensional (1D) images from the electronic signals using a peak detection-and-hold circuit. After vertical scanning with a stepping motor on the imaging plane, a 2D PA image of the sample is successfully obtained. Combined with the time-resolved technique, we can then get 3D PAT images. The results show that the reconstructed images agree well with the original samples.
Wei
Yadong
Y
School of Physics and Telecom Engineering, Laboratory of Photonic Information Technology, South China Normal University, 510006, Guangzhou, China.
Tang
Zhilie
Z
Zhang
Hanchao
H
He
Yongheng
Y
Liu
Haifeng
H
D000162:Acoustics / Q000295:instrumentation; D001709:Biotechnology / Q000295:instrumentation; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000295:instrumentation* / Q000379:methods; D033401:Microscopy, Acoustic / Q000295:instrumentation*; D008962:Models, Theoretical; D019047:Phantoms, Imaging