递变电压下投影融合图像重建研究  

Projection Fused Image Reconstruction Algorithm Study Based on Graded Variable Voltage

作　　者：赵晋利 胡红萍[1] 李权[2] 

机构地区：[1]中北大学理学院神经网络课题组,太原030051 [2]中北大学信息探测与处理山西省重点实验室,太原030051

出　　处：《核电子学与探测技术》2015年第6期585-589,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然基金(61275120)资助

摘　　要：针对变电压投影数据中的不完全投影数据重建问题,提出基于投影数据线性融合的变电压CT重建算法。该算法根据最佳灰度带提取递变电压投影序列中的有效信息,利用线性融合的方法,把低电压下的投影数据通过线性关系融合到相邻高电压投影数据上,依此类推直至最高电压,获得一幅完整信息的高动态投影数据,并利用TV-ART算法重建。实验表明:线性融合算法不仅实现了变电压图像信息的完整重建,像素值也更加稳定。To solve the problem of the incomplete projection data reconstruction in variable voltage, linear fused CT reconstruction algorithm based on variable voltage has advanced. The algorithm firstly extract the projective sequences according to the optimal gray belt, then the projection data under low voltage is linear fused to the adjacent high voltage projection data, and so on, until the highest voltage for a complete projection information, and use the TV - ART algorithm to reconstruct it. Experiment shows that the proposed algorithm can complete- ly reflect the information of a complicated structural component, and the pixel values are more stable.

关 键 词：变电压CT TV-ART算法 线性融合 有效投影 

分 类 号：O29[理学—应用数学]