消除吸收和相位衬度X射线计算机断层成像中环形伪影的简单逐像素响应校正
A simple, pixel-wise response correction for ring artifact removal in both absorption and phase contrast X-ray computed tomography
摘要：
我们提出了一个像素特定的，测量驱动的校正，有效地减少错误的探测器响应，引起环伪影常见的X射线计算机断层成像（CT）扫描。这种校正易于实现，显著抑制CT伪影，并且对于吸收和相位对比成像都足够有效。它可以用作独立校正或与现有的环形伪影去除算法结合使用，以进一步提高图像质量。我们使用两个X射线CT数据集验证这种方法，显示校正后的信噪比增加高达55%，我们定义了一个图像质量指标，专门用于评估环伪影抑制。
英文摘要：
We present a pixel-specific, measurement-driven correction that effectively minimizes errors in detector response that give rise to the ring artifacts commonly seen in X-ray computed tomography (CT) scans. This correction is easy to implement, suppresses CT artifacts significantly, and is effective enough for use with both absorption and phase contrast imaging. It can be used as a standalone correction or in conjunction with existing ring artifact removal algorithms to further improve image quality. We validate this method using two X-ray CT data sets, showing post-correction signal-to-noise increases of up to 55%, and we define an image quality metric to use specifically for the assessment of ring artifact suppression.
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