直接三维ECT传感器灵敏度计算  

Calculation of sensitivity for direct 3D ECT sensor

作　　者：王伊凡[1] 颜华[1] 孙延辉[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2015年第1期80-86,共7页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(61071141);辽宁省高等学校优秀人才支持计划项目(LR2013005)

摘　　要：针对采用传统方法获取直接三维ECT传感器灵敏度分布计算时间较长的问题,提出了一种基于电场强度的灵敏度近似计算方法来获取三维ECT传感器灵敏度分布,并通过灵敏度预处理提高重建图像质量.仿真结果表明,传统计算法和近似计算法获得的灵敏度矩阵和对应的重建结果均很接近,但近似计算法的计算时间只是传统计算法的1.5%,灵敏度预处理可使重建质量略有提升.两种灵敏度计算法均可用于三维ECT重建,近似计算法在计算时间上有显著优势.Aiming at the problem that the computation time of obtaining sensitivity distribution for direct 3D sensor by traditional calculation method is very long,an approximate method based on electric field intensity was used to calculate the sensitivity distribution of a 3D ECT sensor. The sensitivity preprocessing was used to improve the quality of reconstructing image. The simulated results showthat the sensitivity matrix obtained by the traditional and approximate calculation methods and the corresponding reconstructing results are very close,but the computing time of the latter is 1. 5% of that of the former. The sensitivity preprocessing can slightly improve the reconstruction quality. Two sensitivity calculation methods can all be used for 3D ECT reconstruction,and the approximate calculation method has significant advantage in computation time.

关 键 词：ECT系统 直接三维 图像重建 敏感场 近似计算 电场强度 邻域平均 拉普拉斯变换 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]