摘要
目的采用主观法和客观法测试CT机的空间分辨力,探讨与空间分辨力相关的各项参数。方法采用Catphan500和自制体模对2台CT在不同条件下进行了测试。结果分别得出了线对法和MTF方法下的结果。结论每种测试方法各有优缺点,有多种因素影响CT空间分辨力。
The authors adopted subjective and objective methods for measuring high-contrast resolution (HCR) of CT and explored the parameters in relation to HCR. With Catphan500 and a self-prepared experimental phantom, the two CT sets were tested for HCR with varied slice thickness and kernels. The subjective assessment of the images was carried out by visual detection of HCR, and objective assessment was performed by calculations. Each of the methods has its advantages and limitations, and many factors may affect the HCR of CT.
出处
《第一军医大学学报》
CSCD
北大核心
2005年第5期545-546,共2页
Journal of First Military Medical University
基金
军队医药卫生科研基金课题(01Q072)~~
关键词
空间分辨力
体模
调制传输函数
主观法
high-contrast resolution
phantom
modulation transfer function
subjective method
