Assimakopoulos P A, Boyd D P, Jaschke W, Lipton M J
Invest Radiol. 1986 Mar;21(3):260-71. doi: 10.1097/00004424-198603000-00012.
Methods are presented for the quantification of spatial resolution in x-ray computed tomographic (CT) images. Model-dependent methods are derived and compared with model independent methods for computation of the Modulation Transfer Function (MTF). These techniques are applied to phantom images of point, line, edge, and ring discontinuities. The model-dependent methods utilize multiparameter fits of a two-dimensional model function to the image data. Model predictions are compared with results obtained in a model-independent way by numerical transformation of the data. Results of resolution measurements of an Imatron C-100 CT scanner at UCSF and a second experimental scanner at the UCSF Physics Research Laboratory are presented.
本文介绍了用于量化X射线计算机断层扫描（CT）图像空间分辨率的方法。推导了依赖模型的方法，并将其与用于计算调制传递函数（MTF）的独立于模型的方法进行比较。这些技术应用于点、线、边缘和环形不连续的体模图像。依赖模型的方法利用二维模型函数对图像数据进行多参数拟合。通过对数据进行数值变换，将模型预测结果与以独立于模型的方式获得的结果进行比较。本文还展示了加州大学旧金山分校（UCSF）的Imatron C-100 CT扫描仪以及UCSF物理研究实验室的第二台实验性扫描仪的分辨率测量结果。
