| 基于重投影的CT图像硬化伪影校正 |
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| 引用本文： | 吴志宏,丛鹏,刘锡明.基于重投影的CT图像硬化伪影校正[J].原子能科学技术,2015,49(5):935-938. |
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| 作者姓名： | 吴志宏 丛鹏 刘锡明 |
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| 作者单位： | 清华大学 核能与新能源技术研究院 核检测技术北京市重点实验室，北京100084 |
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| 摘 要： | 在工业计算机断层成像(CT)技术中所用的X射线源通常是多能的,检测过程中只能获得多能投影数据,若直接重建图像则会出现硬化伪影,硬化伪影校正是提高重建图像质量的一重要步骤。本文采用重投影的方法来校正由于射线硬化导致重建图像出现的硬化伪影,通过硬化校正后的重建CT图像质量得到显著提高。
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| 关 键 词： | 计算机断层成像 射线硬化 重投影 伪影校正 |
Beam Hardening Artifact Correction in CT Based on Re-projection |
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| WU Zhi-hong,CONG Peng,LIU Xi-ming.Beam Hardening Artifact Correction in CT Based on Re-projection[J].Atomic Energy Science and Technology,2015,49(5):935-938. |
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| Authors: | WU Zhi-hong CONG Peng LIU Xi-ming |
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| Affiliation: | Beijing Key Laboratory on Nuclear Detection & Measurement Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | X-ray sources are polychromatic in industrial CT so that only polychromatic projection data can be gotten in the process of testing. The reconstruction image of CT has beam hardening artifact when using the polychromatic data for reconstruction directly. Beam hardening artifact correction is an important step to improve the quality of reconstruction images. Re-projection method, which is used to correct artifact in reconstruction image because of beam hardening, improves the quality of CT image greatly. |
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| Keywords: | computed tomography beam hardening re-projection artifact correction |
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