光子学报, 2010, 39 (9): 1588, 网络出版: 2010-11-04
针对小动物的锥束CT重建的研究及验证
Investigation and Validation of the Reconstruction Algorithm for Small Animal Cone-beam CT Imaging
摘要
基于经典3D Shepp-Logan模型,应用射线追踪和射线衰减定律得到锥束CT的模拟仿真数据.利用FDK三维重建算法实现锥束CT图像重建,采用仿真图像对重建算法进行了验证,通过搭建的锥束CT系统和自制仿体进行了层析成像和图像重建.结果表明:算法可较为准确地重建出原物体的空间分布和密度关系,针对仿真数据的中心断层重建图像的空间分辨率可达到8 lp/mm.
Abstract
Simulation for cone beam CT system and the 3D Shepp-Logan Model is carried out.FDK reconstruction algorithm is developed to reconstruct the images and then evaluated with the 3D Shepp-Logan Mode.Experiments are carried out on a constructed cone beam CT system and a homemade phantom.Simulation and experimental reconstruction results indicate that reconstruction algorithm can faithfully provide both the position and relative contrast of the inner objects.The spatial resolution of the central image from simulation data can reach 8 linepairs/mm.
缪辉, 王秋殷, 赵会娟, 王婷婷, 高峰. 针对小动物的锥束CT重建的研究及验证[J]. 光子学报, 2010, 39(9): 1588. MIAO Hui, WANG Qiu-yin, ZHAO Hui-juan, WANG Ting-ting, GAO Feng. Investigation and Validation of the Reconstruction Algorithm for Small Animal Cone-beam CT Imaging[J]. ACTA PHOTONICA SINICA, 2010, 39(9): 1588.