Hounsfield G N
AJR Am J Roentgenol. 1976 Jul;127(1):3-9. doi: 10.2214/ajr.127.1.3.
Some limitations that impair the picture quality of computed tomography are presented. Picture grain is analyzed in detail and its relationship to different matrix sizes is demonstrated. The choices of matrix size for viewing various parts of the body are defined, and the need for higher resolution in the future is debated. Comparison is made between two scanning systems: the moving fan beam with rotation and the simple rotating fan beam. Possible artifacts in the picture caused by drift and delay in dector response are discussed.
介绍了一些影响计算机断层扫描图像质量的局限性。详细分析了图像颗粒，并展示了其与不同矩阵大小的关系。确定了观察身体各个部位时矩阵大小的选择，并对未来更高分辨率的需求进行了讨论。对两种扫描系统进行了比较：旋转移动扇形束和简单旋转扇形束。讨论了探测器响应中的漂移和延迟在图像中可能产生的伪影。
