左边，影锥之外的天空仍然是明亮的。

At left, the sky outside the shadow cone is still bright.

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本文分析FDK算法在中大锥角时重建产生伪影的主要原因是投影数据不完全，被扫描物体雷当空间数据缺失。

The main reason is the radon space data of scanned object is not complete, which will result in the image artifacts when using FDK algorithm to reconstruct with moderate or large cone angles.

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实验结果表明，研究提出的散射校正方法能有效减少基于平板探测器的锥束CT 系统散射伪影，提高了重建切片图像的质量。

The result showed that the method can effectively reduce the scatter artifacts and increase the quality of the reconstructed slice image.

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