CAJ | 학술논문

在CT图像重建中，由于CT设备本身的结构和重建算法的局限性以及病人自主或者非自主的运动破坏了投影数据的一致性和完整性。当投影数据采集或投影角度不完全时，通常采用代数重建算法（ART）及其改进算法进行重建。但由于ART算法运行速度较慢，耗时较多。本文从恢复缺失的投影角度出发，通过比较不同的插值方法，采用双线性插值法对不完全角度下的或缺失的投影数据进行估计，得到了一定的成效，并对其投影图像进行恢复，从而缩短了运行时间。
재CT도상중건중，유우CT설비본신적결구화중건산법적국한성이급병인자주혹자비자주적운동파배료투영수거적일치성화완정성。당투영수거채집혹투영각도불완전시，통상채용대수중건산법（ART）급기개진산법진행중건。단유우ART산법운행속도교만，모시교다。본문종회복결실적투영각도출발，통과비교불동적삽치방법，채용쌍선성삽치법대불완전각도하적혹결실적투영수거진행고계，득도료일정적성효，병대기투영도상진행회복，종이축단료운행시간。
In CT image reconstruction, structure of the CT device , the limitation of the reconstruction algorithm and the autonomous or independent movement of the projection datas. Algebra recon s＇truc-tion algorithm of p and atient are destroy the consistency and integrity its improved algorithms are using in CT image reconstruction bec- ause of incomplete projective dates collection and projective angles. Slower running speed and more compute time are drawbacks of the mentioned algorithm. In this pap-er, we consider the deficient angles to recover, compare with different interpolations, incomplete angles and defect projective dates are estimated effectively by duble-linear interpolation method, and then recover the projective images, cut down the running time finally.