ZHAO Ying-liang, WANG Li-ming, HAN Yan
(School of Information and Communication Engineering, North University of China, Taiyuan 030051, China)
Abstract： The traditional computed tomography (CT) reconstruction methods are noisy, low resolution, poor contrast, and generally not suitable to detect the smaller flaws. Besides, the filter design is also difficult. The CT characteristics reconstruction technology was brought forward to improve in these aspects, which is defined to directly reconstruct the characteristics of the projection for the best requirements not the overall image quality. The two-dimension (2D) and three-dimension (3D) CT characteristics reconstruction algorithm were firstly introduced, then by detailed analysis, experimental results and comparsion of parameters calculated, its advantages in keeping better high-frequency feature, better noise immunity, short time-consuming and easier design are verified.
Key words： three-dimension (3D); computed tomography (CT) reconstruction; characteristics reconstruction technology
CLD number： TP391.41Document code： A
Article ID： 1674-8042（2016）02-0129-07 doi： 10.3969/j.issn.1674-8042.2016.02.006
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CT特征重建技术研究
赵英亮， 王黎明， 韩焱
（中北大学 信息与通信工程学院， 山西 太原 030051）
摘要:传统的CT重建技术在检测物体内部细小缺陷时， 具有噪声难以滤除、 分辨率低、 对比度差等特点， 滤波器设计和实现具有难度。文中提出一种特征CT重建技术， 能有效改善上述缺陷， 它是以突现构件特征为目的的CT重建算法， 重建图像的目的不是达到整体图像质量最好， 而是从突现重建图像特征出发， 达到重建图像作用。 文中首先介绍了二维及三维特征CT重建算法理论， 并通过详细分析、 实验结果与参数计算的对比， 验证了特征CT重建方法在高频信息、 抗噪能力、 滤波器设计及实现速度方面的明显优势。
关键词:三维； CT重建； 特征重建技术
引用格式：ZHAO Ying-liang, WANG Li-ming, HAN Yan. Research on CT characteristics reconstruction technology. Journal of Measurement Science and Instrumentation, 2016, 7(2)： 129-135. ［doi： 10.3969／j.issn.1674-8042.2016.02.006］
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