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A Photoacoustic Tomography System Based on Time-Domain Back Projection Method
Author(s): LU Tao, ZANG Haihe
Pages: 59-
61,66
Year: 2010
Issue:
1
Journal: Beijing Biomedical Engineering
Keyword: 光声谱成像; 时域; 超声波; 宽带超声传感器;
Abstract: 光声谱成像是一种新的生物组织成像方法 ,它结合光学成像和超声成像的特点,可提供高分辨率和对比度的图像.采用波长532nm、重复频率10Hz的脉冲激光作为激励源,宽带PVDF非聚焦超声探测器频率响应范围为200kHz~15MHz,探测器以圆周扫描的方式采集样品的时域光声信号,并采用时域后向投影算法重建样品内部的二维光学吸收分布图像.实验表明,系统成像的空间分辨率小于1mm,重建的图像与原始样品完全吻...
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