Snapshot 2D tomography via coded aperture x-ray scatter imaging.
Snapshot 2D tomography via coded aperture x-ray scatter imaging.
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DOI：
10.1364/ao.52.004582
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发表时间：
2013-07-01
期刊：
影响因子：
1.9
通讯作者：
Brady DJ
中科院分区：
文献类型：
--
作者：
MacCabe KP;Holmgren AD;Tornai MP;Brady DJ
本文介绍了一种扇形光束编码孔径x射线散射成像系统，该系统从每个快照中获取层析图像。该技术利用散射截面的圆柱对称性来避免投影断层扫描通常需要的扫描运动。我们使用具有谐波依赖的编码孔径来确定距离，并使用移位码来确定交叉距离。在这里，我们使用前向散射配置来成像二维物体，并使用连续曝光来获取平面内运动的层析视频。我们的重建算法还估计散射辐射的角度依赖性，这是材料成像和识别的一步。
This paper describes a fan beam coded aperture x-ray scatter imaging system which acquires a tomographic image from each snapshot. This technique exploits cylindrical symmetry of the scattering cross section to avoid the scanning motion typically required by projection tomography. We use a coded aperture with a harmonic dependence to determine range, and a shift code to determine cross-range. Here we use a forward-scatter configuration to image 2D objects and use serial exposures to acquire tomographic video of motion within a plane. Our reconstruction algorithm also estimates the angular dependence of the scattered radiance, a step toward materials imaging and identification.