摘要
目的 了解CT噪声的影响因素及其原因。方法 应用计算机软件测试系统 ,采用不同直径的容器 ,不同密度的液体为受检体。选用不同的扫描参数及扫描方式 ,对受检体分别进行扫描 ,测量图像中相同位置和面积感兴趣区域噪声。结果 扫描参数 ,受检体的体积及密度均影响CT图像噪声。结论 除CT的机械噪声外 ,多种因素可以影响CT图像噪声。
Purpose To find out the noise effected factors on CT imaging and its causes. Methods We adopted different diameter of volumes and different density of liquids as scanning objects and tested their noise in same areas and region of interest respectively, with different scanning parameter and different scanning methods in computer soft testing system. Results Each of scanning parameter, volume and density affected the noise on CT imaging. Conclusion Many kinds of factors could affected noise besides the mechanical factor in CT examination.
出处
《中国医学影像技术》
CSCD
2001年第12期1236-1237,共2页
Chinese Journal of Medical Imaging Technology
