Regional SNR optimization in dual-screen computed radiography (CR) imaging
Regional SNR optimization in dual-screen computed radiography (CR) imaging
复制标题
双屏计算机放射成像 (CR) 成像中的区域 SNR 优化
DOI：
10.1117/12.273998
复制
发表时间：
1997
影响因子：
6.7
通讯作者：
D. S. Breitenstein
中科院分区：
文献类型：
--
作者：
C. Shaw;D. S. Breitenstein
双屏CR成像技术可以提高x射线吸收和图像信噪比。先前的研究表明，可以优化图像叠加过程以获得叠加图像的最佳信噪比。从理论上推导了最优加权因子和信噪比，并与前后图像的信噪比相关。这种关系已被实验证实。然而，该技术的实际实现涉及非均匀图像信号和信噪比。为了了解如何确定最佳加权因子以及它们在非均匀图像中的空间变化情况，进行了理论、数值和实验研究。结果表明，最优权重因子的空间变异最小。经验方法可用于确定信号不均匀性最小的区域上的最优加权因子。由此产生的加权因子可以应用于整个前后图像的叠加，以获得最佳的信噪比。
Dual-screen CR imaging technique can be used to improve x- ray absorption and image signal-to-noise ratio (SNR). Previous research has shown that it is possible to optimize the image superimposition process for best SNR in the superimposed image. Optimal weighting factors and SNRs have ben theoretically derived and related to the SNRs in the front and back images. The relationship has been experimentally verified. Practical implementation of the technique, however, involves non-uniform image signals and SNRs. To understand how the optimal weighting factors can be determined and how they vary spatially in non-uniform images, theoretical, numerical and experimental studies have been conducted. The results indicate that spatial variation of optimal weighting factors is minimal. An empirical method can be used to determine the optimal weighting factors over regions with minimal signal non-uniformity. The resulting weighting factors can be applied to superimposition of the entire front and back images for best SNR.
提高双屏计算机放射成像中的信噪比和对比度噪声比。
影响因子：
3.8
作者：
Shaw,CC;Wang,TP;Breitenstein,DS;Gur,D
通讯作者：
Gur,D