基于Matlab CT空间分辨率自动检测的研究与实践

Matlab-based Automatic Detection System for CT Spatial Resolution

目的:在Matlab环境下,利用该研究提出的LP-MTF检测算法实现CT空间分辨率的自动检测,并与目测法的检测结果进行比较。方法:对美国体模实验室Catphan 500体模进行扫描并获取扫描图像,利用图像处理技术和LP-MTF算法对扫描图像的空间分辨率进行自动检测。结果:CT空间分辨率的自动检测系统方便快捷,人工干预少,客观性程度高,完全可以适用于CT机应用质量检测中。结论:该自动检测方法的研制成功证明了数字化检测方法的可行性,为远程检测提供一种新的方法。

Objective To realize automatic detection of CT spatial resolution based Matlab and self-developed LP-MTF algorithm, and to compare the result with that by visual method. Methods Catphan 500 phantom was scanned, and then the spatial resolution of the scanning image was detected automatically with image processing techniques and LP-MTF algorithm. Results The automatic detection system for CT spatial resolution, with few artificial intervention, could be used for quality test of CT machine. Conclusion The feasibilities of digital and remote detections are proved.