CAJ | 학술논문

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。
침대변전압투영수거중적불완전투영수거중건문제，제출기우투영수거선성융합적변전압CT중건산법。해산법근거최가회도대제취체변전압투영서렬중적유효신식，이용선성융합적방법，파저전압하적투영수거통과선성관계융합도상린고전압투영수거상，의차유추직지최고전압，획득일폭완정신식적고동태투영수거，병이용TV－ART산법중건。실험표명：선성융합산법불부실현료변전압도상신식적완정중건，상소치야경가은정。
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 .