摘要
采用计算机模拟物理过程并进行仿真试验,分析平台不同类型运动精度对CT成像图像质量的影响。结果表明,平台轴向运动精度和水平轴运动精度对图像的影响可采取在程序中进行系数修正的方式予以减小甚至消除。转动精度和重复率对成像造成的误差随着精度的大小而不同,难以预测。水平面倾角对成像影响随角度的变化而不同,与试件放置位置和密度分布有关,难以预测。
By using the computer simulation of the physical processes and the experiment, the influence on the image quality in different precisions was studied. The results indicated that the effects of the axial accuracy and the horizontal motion accuracy on the image reconstruction can be reduced or eliminated. The effects of the rotation accuracy and the repeatability varied with the accuracy and were unpredictable. And the effect related to the position and the density distribution of the test was changed with different angle and was hard to forecast.
出处
《无损检测》
2013年第11期39-42,92,共5页
Nondestructive Testing
关键词
ART算法
图像重建
平台精度
图像质量
ART algorithm
Image reconstruction
Platform accuracy
Image quality
