Title :
A Photoacoustic Tomography System Based on a Double-Ring Sensor with a Narrow Angular Aperture
Author :
Wang, Hui ; Da Xing ; Gu, Huaimin ; Yang, Diwu ; Ji, Xuanrong ; Lao, Yeqi
Author_Institution :
South China Normal Univ., Guangzhou
Abstract :
A photoacoustic tomography system is developed by using a double-ring sensor featuring a narrow angular aperture. An angular aperture of 2.0 degree can be obtained with this sensor, which improves the spatial resolution of the sensor in scanning direction. In this sensor a fiber for illumination of the sample is integrated, which enables reflection-mode detection of ultrasonic waves. These give the ability to make A-scans of the tissue on a line in depth. Scanning over the surface of the tissue, a photoacoustic tomography can be obtained in a manner analogous to the ultrasound B-can mode. The system is demonstrated with phantom samples, the reconstructed images agree well with the structures of the samples.
Keywords :
acoustic tomography; biological tissues; biomedical ultrasonics; sensors; double-ring sensor; narrow angular aperture; photoacoustic tomography system; reflection-mode detection; spatial resolution; tissue; ultrasonic waves; ultrasound B-can mode; Apertures; Image reconstruction; Imaging phantoms; Lighting; Optical fiber sensors; Sensor systems; Spatial resolution; Surface reconstruction; Tomography; Ultrasonic imaging;
Conference_Titel :
Complex Medical Engineering, 2007. CME 2007. IEEE/ICME International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-1077-4
Electronic_ISBN :
978-1-4244-1078-1
DOI :
10.1109/ICCME.2007.4381895
