| 探测器和投影数目对 CT 重建精度的影响 |
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| 引用本文： | 缪丽娜,潘晋孝,韩焱.探测器和投影数目对 CT 重建精度的影响[J].测试技术学报,2002,16(4):302-304. |
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| 作者姓名： | 缪丽娜 潘晋孝 韩焱 |
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| 作者单位： | 华北工学院,电子信息工程系,山西,太原,030051 |
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| 摘 要： | 利用迭代算法从不完全的投影数据中重建图像，得出探测器和投影的数目与图像精度的关系。用琐的探测器数目和旋转角度个数分别进行了图像的重建。在投影数据不完全的条件下，迭代法可以得到较好的重建效果，对于迭代算法，在相同的重建时间内，探测器的数目对图像精度的影响比旋转角度个数的影响要大。
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| 关 键 词： | 探测器 投影数目 计算机断层扫描成像 图像精度 不完全投影数据 迭代法 |
| 文章编号： | 1671-7449(2002)04-0302-03 |
| 修稿时间： | 2002年9月20日 |
The Influence of the Number of Detectors and Projections on the Accuracy of CT Reconstruction |
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| MIAO Li na,PAN Jin xiao,HAN Yan.The Influence of the Number of Detectors and Projections on the Accuracy of CT Reconstruction[J].Journal of Test and Measurement Techol,2002,16(4):302-304. |
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| Authors: | MIAO Li na PAN Jin xiao HAN Yan |
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| Abstract: | Using ART (Algebraic reconstruction technique) to reconstruct an image from the incomplete data, a conclusion on the relationship between the reconstruction accuracy and the number of detectors and projections can be drawn. Different number of detectors and projections were used for. Although the projection data is incomplete, good results can be received by using ART reconstructing the image. In the same calculating time, the number of detectors has greater effect on the precision of image than the number of the projections. |
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| Keywords: | incomplete projection data ART filter backprojection |
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