Feldkamp-type VOI reconstruction from super-short-scan cone-beam data.
Feldkamp-type VOI reconstruction from super-short-scan cone-beam data.
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DOI：
10.1118/1.1739298
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发表时间：
2004-06
期刊：
影响因子：
3.8
通讯作者：
Hengyong Yu;Ge Wang
中科院分区：
文献类型：
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作者：
Hengyong Yu;Ge Wang
基于最近由诺奥等人[Phys.Med.Biol.47，2525-2546（2002）]开发的扇束重建公式，我们开发了用于从超短扫描数据重建感兴趣体积（VOI）的Feldkamp型算法。在我们的VOI重建方案中，无论是圆形还是螺旋形扫描轨迹，我们首先使用流行的“余弦校正”方案从锥束数据估计扇束数据，并基于诺奥的FBP型扇束重建进行重建。我们提出的算法进行了测试，使用三维（3-D）Shepp-Logan幻影。实验结果表明，新算法可应用于多源4-D CT，相对于Katsevich算法具有显着的上级时间分辨率和时间一致性，后者是精确螺旋锥束重建的最新技术水平。
Based on the fan-beam reconstruction formula recently developed by Noo et al. [Phys. Med. Biol. 47, 2525-2546 (2002)] we develop a Feldkamp-type algorithm for the reconstruction of a volume of interest (VOI) from super-short-scan data. With either a circular or spiral scanning locus in our VOI reconstruction scheme, we first estimate fan-beam data from cone-beam data using the popular "cosine correction" scheme, and perform reconstruction based on Noo's FBP-type fan-beam reconstruction. Our proposed algorithm is tested using the three-dimensional (3-D) Shepp-Logan phantom. The experimental results show that the new algorithm can be applied to multi-source 4-D CT with significantly superior temporal resolution and temporal consistency relative to the Katsevich algorithm, which is the state of the art for exact helical cone-beam reconstruction.