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用于光谱光子计数CT的戒指工件去除

Tianjiao Sun, Xin Lu, Xinran Yu

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    |August 13, 2025
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    概括

    光子计数探测器 (PCD) 提供先进的成像能力,但在环形工件方面面临挑战. 本研究引入了一种双域优化模型,以有效地去除环形工件,提高图像质量.

    科学领域:

    • 医疗成像医学成像
    • 图像处理 图像处理
    • 探测器技术 探测器技术

    背景情况:

    • 相对于集能探测器,光子计数探测器 (PCD) 提供更高的空间分辨率,对比度和噪声比率,以及剂量效率.
    • 环形文物是PCD成像中的一个重大挑战,阻碍了高质量的图像重建.
    • 当前的处理技术难以有效地去除环形工件,需要先进的解决方案.

    研究的目的:

    • 开发和评估一种新的双域优化模型,用于集成的双光谱成像和戒指器件去除.
    • 解决现有方法在抑制环形艺术品的局限性,同时保留图像细节.

    主要方法:

    • 提出了一个双域优化模型,包括单向总变化 (TV) 正规化,组稀疏性正规化和TV正规化.
    • 该模型整合了基础材料分解期间的工件移除,纠正探测器响应不一致性和利用图像空间结构.
    • 为模型优化设计了一个高效的交替最小化方案.

    主要成果:

    • 拟议的方法有效地去除环形艺术品,同时保留关键的图像细节.
    • 对模拟和真实数据的实验表明,该模型能够在文物抑制和细节保存之间实现最佳平衡.
    • 定量和定性评估显示,与最先进的戒指人工物去除技术相比,性能优越.

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    结论:

    • 双域优化模型为光子计数探测器成像中的环形物件去除提供了强大的解决方案.
    • 这种方法通过有效地抑制文物和保持诊断信息来显著提高图像质量.
    • 该方法有望在使用PCD推进高质量的多能成像应用.