光子学报, 2009, 38 (8): 2131, 网络出版: 2010-05-10
基于CT数据一致性的双多项式射束硬化校正改进
Improvement of Bi-polynomial Method for Beam Hardening Correction Based on Consistency of CT Data
摘要
针对目前各种校正算法对条状伪影校正效果不显著，分析了条状伪影的产生原因.由此考虑射线穿过不同骨厚度对软组织投影贡献的影响，对基于H-L一致性条件的双多项式校正算法的软组织校正多项式改进.Forbild头部模体的仿真结果表明，该改进方法对杯状伪影和条状伪影都有良好的校正效果.
Abstract
Due to all kinds of correction algorithms have little effects on streak artifact at present,the reason of streak artifact is analyzed.Therefore,considering that the influence of soft tissue caused by the X-rays which penetrate through different bone thicknesses are different,the soft tissue correction polynomial in Bi-Polynomial correction method is improved based on H-L consistency condition.Forbild head phantom simulation results show that the improved algorithm can get better correction effect on both cupping artifact and streak artifact.
张砚博, 汤少杰, 牟轩沁. 基于CT数据一致性的双多项式射束硬化校正改进[J]. 光子学报, 2009, 38(8): 2131. ZHANG Yan-bo, TANG Shao-jie, MOU Xuan-qin. Improvement of Bi-polynomial Method for Beam Hardening Correction Based on Consistency of CT Data[J]. ACTA PHOTONICA SINICA, 2009, 38(8): 2131.
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