SIMULTANEOUS ALGEBRAIC RECONSTRUCTION TECHNIQUE (SART) - A SUPERIOR IMPLEMENTATION OF THE ART ALGORITHM
SIMULTANEOUS ALGEBRAIC RECONSTRUCTION TECHNIQUE (SART) - A SUPERIOR IMPLEMENTATION OF THE ART ALGORITHM
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DOI：
10.1016/0161-7346(84)90008-7
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发表时间：
1984-01-01
影响因子：
2.3
通讯作者：
KAK, AC
中科院分区：
文献类型：
--
作者：
ANDERSEN, AH;KAK, AC
在本文中，我们讨论了什么似乎是一个上级实现的代数重建技术（ART）。该方法是基于1）同时应用的误差校正项计算的ART的所有射线在一个给定的投影; 2）纵向加权的校正项后分布沿着的射线;和3）使用双线性元素的离散近似的射线积分的连续图像。由于这种实现方式仅在一次迭代中生成良好的重建，因此它似乎也具有比ART的更传统的实现方式更大的计算优势。这种实现方式的潜在应用包括结合超声和微波断层扫描的射线跟踪的图像重建，其中射线的弯曲性质导致图像上的非均匀射线密度。
In this paper we have discussed what appears to be a superior implementation of the Algebraic Reconstruction Technique (ART). The method is based on 1) simultaneous application of the error correction terms as computed by ART for all rays in a given projection; 2) longitudinal weighting of the correction terms back-distributed along the rays; and 3) using bilinear elements for discrete approximation to the ray integrals of a continuous image. Since this implementation generates a good reconstruction in only one iteration, it also appears to have a computational advantage over the more traditional implementation of ART. Potential applications of this implementation include image reconstruction in conjunction with ray tracing for ultrasound and microwave tomography in which the curved nature of the rays leads to a non-uniform ray density across the image.