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基于平板探测器的锥束CT散射校正方法

Computerized Tomography Theory and Applications(2009)

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Abstract
针对基于平板探测器的锥束CT系统固然存在的散射伪影,提出在X射线源和被检测物体之间添加一个射束衰减网格装置的散射校正方法。本文首先介绍了射束衰减网格的实验装置,然后推导了基于射束衰减网格的锥束CT散射校正方法,最后通过圆柱样品实验验证了算法的可行性。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。
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Key words
scatter correction,Compton scatter,beam attenuation grid,cone beam CT
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