Scattered radiation is a major cause of image quality degradation in flat panel detector‐based cone beam CT (CBCT). While recently introduced 2D antiscatter grids reject the majority of scatter fluence, the small percentage of scatter fluence still transmitted to the detector remains a major challenge for implementation of quantitative imaging techniques such as dual energy imaging in CBCT. Additionally, this residual scatter is also a major source of grid‐induced artifacts, which impedes implementation of 2D grids in CBCT. We therefore present a new method to achieve both robust scatter rejection and residual scatter correction using a 2D antiscatter grid; in doing so, we expand the role of 2D grids from mere scatter rejection devices to scatter measurement devices.

中文翻译：

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锥形束CT的统一散射抑制和校正方法

散射辐射是基于平板探测器的锥形束 CT (CBCT) 图像质量下降的主要原因。虽然最近引入的 2D 反散射网格拒绝了大部分散射注量，但仍然传输到检测器的小部分散射注量仍然是实施定量成像技术（如 CBCT 中的双能成像）的主要挑战。此外，这种残余散射也是网格引起的伪影的主要来源，这阻碍了 CBCT 中二维网格的实现。因此，我们提出了一种使用 2D 反散射网格实现鲁棒散射抑制和残余散射校正的新方法；在此过程中，我们将 2D 网格的作用从单纯的散射抑制设备扩展到散射测量设备。