Modulation of the x‐ray source in computed tomography (CT) by a designated filter to achieve a desired distribution of photon flux has been greatly advanced in recent years. In this work, we present a densely sampled spectral modulation (DSSM) as a promising low‐cost solution to quantitative CT imaging in the presence of scatter. By leveraging a special stationary filter (namely a spectral modulator) and a flying focal spot, DSSM features a strong correlation in the scatter distributions across focal spot positions and sees no substantial projection sparsity or misalignment in data sampling, making it possible to simultaneously correct for scatter and spectral effects in a unified framework.

中文翻译：

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使用具有飞行焦点的固定调制器对X射线CT进行密集采样的频谱调制：散射和频谱校正的概念和可行性研究

近年来，通过指定的滤波器对计算机断层摄影（CT）中的X射线源进行调制，以实现所需的光子通量分布。在这项工作中，我们提出了一种密集采样频谱调制（DSSM），作为在有散射情况下进行定量CT成像的有前途的低成本解决方案。通过利用特殊的固定滤波器（即频谱调制器）和飞行焦点，DSSM在焦点位置之间的散布分布中具有很强的相关性，并且在数据采样中不会出现明显的投影稀疏或未对准的情况，从而可以同时校正统一框架中的散射和光谱效应。