| Splatting算法在三维CT迭代算法中的应用 |
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| 引用本文： | 莫会云,潘晋孝.Splatting算法在三维CT迭代算法中的应用[J].CT理论与应用研究,2007,16(3):6-12. |
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| 作者姓名： | 莫会云 潘晋孝 |
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| 作者单位： | 中北大学,理学院,电子测试技术国防重点实验室,太原030051 |
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| 摘 要： | 采用代数重建技术重建三维物体,提出了一种基于splatting原理的ART权值计算方法,以增强重建图像的空间分辨率.该算法基于三维锥束扫描方式,采用双三次样条局部基函数作为插值核,并利用其足印函数对物体进行插值来计算像素的权值.与常量插值相比,这种方法对物体的灰度值有更精确的近似,在相同的实验条件下可重建出分辨率高的物体.给出了适用于三维锥束重建的splatting算法的具体实现,并对实验数据进行了实物重建及误差分析.
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| 关 键 词： | splatting算法 代数重建技术 锥束CT 三次样条函数 |
Splatting Algorithm Apply to Algebraic Arithmetic of Three Dimensional Computer Tomography |
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| MO Hui-yun,PAN Jin-xiao.Splatting Algorithm Apply to Algebraic Arithmetic of Three Dimensional Computer Tomography[J].Computerized Tomography Theory and Applications,2007,16(3):6-12. |
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| Authors: | MO Hui-yun PAN Jin-xiao |
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| Abstract: | This thesis uses ART(algebraic reconstruction technique) to reconstruct 3-D objects,Based on Splatting theory it presents a method of calculating ART weighting coefficients to enhance spatial resolution.This algorithm is based on the 3-D cone-beam scanning,using cubic B spline local basis function as interpolate kernel,and utilizing footprint function of filter kernel to interpolate the volume to calculate the weighting coefficients.Compared with the constant-size interpolation,the algebraic can gain more accurate object gray values.In the same experiment condition it can reconstruct high-resolution object.In the thesis,it gives the practical realization of splatting algebraic adapting to 3-D cone-beam reconstruction,and uses the experiment data to reconstruct the real object and analyze the error. |
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| Keywords: | splatting algorithm algebraic reconstruction technique cone beam CT cubic B spline function |
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