中国医疗设备2016，Vol.31Issue(11)：33-37,49,6.DOI:10.3969/j.issn.1674-1633.2016.11.007
医用CT体模对高对比度分辨力检测结果的影响
Influence of Phantom on the Verification Results of High Contrast Resolution of Medical CT Images
摘要
Abstract
In this paper, the influence of phantom on verification results of high contrast resolution of medical CT images in daily Quality Assessment (QA) tests was analyzed and discussed. And the CTP528 module’s design principle was analyzed under the premise of dissecting its detailed structure. Meanwhile, an Modulation Transfer Function (MTF) estimation method based on SD was used according to CTP528 to calculate the high contrast resolution verification results. The experimental data demonstrated that, under the invariable conditions of scanning mode, slice thickness, reconstruction algorithm and FOV (Field of View), the variation of tube current or tube voltage would not bring apparent change on the verification results of high contrast resolution. Moreover, in addition to the performance of CT equipment itself, the design structure, the place means as well as the machining error of the phantom would also bring a certain degree of influence on the verification results of high contrast resolution. Therefore, as the CT verification phantoms have always been considered as the symbol of “standardization”, however, they still have many shortcomings. Phantoms could play their roles in QA testing better if they were fully understood.关键词
高对比度分辨力/体模/医用CT/质量评价Key words
high contrast resolution/phantom/medical CT/quality assessment分类
机械制造引用本文复制引用
张璞,孙加宇,李姣,孙劼,王广志..医用CT体模对高对比度分辨力检测结果的影响[J].中国医疗设备,2016,31(11):33-37,49,6.基金项目
国家重点研发计划重点专项课题（2016YFF0201004和2016YFC0105800）；国家质量监督检验检疫总局科技计划项目(2016QK187)。 （2016QK187）
