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使用X射线源阵列和交错光谱过器的双能量CBCT,具有减少散射和形束文物

Yuanming Hu, Boyuan Li, Shuang Xu

IEEE transactions on bio-medical engineering

|January 12, 2026

概括

使用多源碳纳米管阵列的新型双能圆束计算断层扫描 (DE-CBCT) 扫描仪显著减少了文物并提高了图像质量. 这种先进的DE-CBCT可以在没有增加辐射暴露的情况下提供更好的材料量化.

科学领域:

医疗成像医学成像
在X射线技术方面,
材料科学材料科学材料科学

背景情况:

形束计算断层扫描 (CBCT) 对于面成像至关重要.
双能CBCT (DE-CBCT) 增强了材料的差异化,但面临着分散和工件的挑战.
现有的DE-CBCT系统通常需要kV开关或能量敏感探测器.

研究的目的:

设计和评估一种新的双能多源CBCT (DE-MS-CBCT) 系统.
为了减少DE-CBCT成像中的散射和形光束工件.
在不增加辐射剂量的情况下提高材料量化的准确性.

主要方法:

开发了一种使用碳纳米管 (CNT) 的X射线源阵列和多个焦点的DE-CBCT扫描仪.
采用交错的低能和高能光谱过器和狭窄的合.
在单个门架旋转中获取的双能量投影数据,并使用一步倒置算法进行处理.
使用人类形象头部,Defrise和特定材料的幻影来评估性能.

主要成果:

该DE-MS-CBCT系统有效地消除了圆束工件.
杯水器件显著减少 (14.53%至2.94%),水密度的平均相对误差减少 (15.3%至1.7%).
和插件的对比噪声比率 (CNR) 增加了4.8%-53.4%,对材料密度的准确性相似.

结论:

开发的DE-MS-CBCT系统成功地减少了散射和形光束工件.
通过CNR表示的图像质量得到了增强,材料量化准确性得到了改善.
这种新的方法在没有增加X射线暴露,能量敏感探测器或kV切换的情况下实现了卓越的性能.

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