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.
School of Physics and Telecom Engineering, Laboratory of Photonic Information Technology, South China Normal University, 510006, Guangzhou, China.
Yadong
Y
Wei
Zhilie
Z
Tang
Hanchao
H
Zhang
Yongheng
Y
He
Haifeng
H
Liu
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