摘要
描述了一个基于Ti∶Sapphire飞秒激光和同步扫描相机的时间分辨光层析 (CT)实验系统。该系统采用步进电机驱动的三维移动平台对被测组织体作类似X射线层析工作方式的平行扫描 ,由此可获得多角度下的时间分辨投影。通过对三种代表不同吸收和散射特性组合的模拟组织体 (phantom)进行实际测量 ,并应用相应的非线性迭代图像重建算法 ,获得了可靠的重建图像。研究结果表明 ,该系统构思简洁 ,工作可靠 。
An experimental system for time-resolved optical tomography was constructed by Ti:sapphire laser and synchroscan streak camera. With three-dimensional step motor driving stage, the system can scan the object to be imaged in a parallel-beam mode analogous to X-ray CT, by which the time-resolved projection at different incident angles can be obtained automatically. By applying the relevant image reconstruction algorithm, the promising images were produced from the measurement for three kinds of tissue-like phantoms that represent the different combination of the absorption and scattering properties of the embedded single inclusion. The results indicate that this system is a reliable and ideal mode for optical tomography research.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2001年第9期1068-1072,共5页
Acta Optica Sinica
基金
法国ConseilRegionald'Alsace所 (合同号 :99/90 1/16 /5 12 )资助课题
