Sporadic absorption tomography using a conical shell X-ray beam
Sporadic absorption tomography using a conical shell X-ray beam
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DOI：
10.1364/oe.25.033029
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发表时间：
2017-12-25
期刊：
影响因子：
3.8
通讯作者：
Rogers, K. D.
中科院分区：
文献类型：
--
作者：
Elarnaut, F.;Evans, J. P. O.;Rogers, K. D.
我们通过测量在平移扫描过程中收集的零星的环形投影序列来演示断层扫描。结果表明，使用10%的采样投影可以构造出峰值信噪比(PSNR)和结构相似指数(SSIM)分别为40d B和0.9量级的光学切片。这种相对较小的图像保真度下降是在X射线剂量潜在减少90%的情况下实现的，同时还减少了扫描时间。我们的方法在X射线能量和检查量方面都是可扩展的。我们方法的一个驱动力是对以前报道的锥形壳梁技术的补充，该技术涉及用于结构分析的绕射通量的测量。这项工作对于时间关键型分析扫描在安全筛查、过程控制和诊断成像中的应用具有重要意义。(C)OSA开放获取出版协议条款下的2017年美国光学学会
We demonstrate tomography by measuring a sporadic sequence of ring shaped projections collected during a translational scan. We show that projections using 10% sampling may be used to construct optical sections with peak signal-to-noise ratio (PSNR) and structural similarity index (SSIM) of the order of 40 dB and 0.9, respectively. This relatively small degradation in image fidelity was achieved for a 90% potential reduction in X-ray dose coupled with a reduction in scan time. Our approach is scalable in both X-ray energy and inspection volume. A driver for our method is to complement previously reported conical shell beam techniques concerning the measurement of diffracted flux for structural analysis. This work is of great relevance to time critical analytical scanning applications in security screening, process control and diagnostic imaging. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement