Detection and Evaluation of Spatial Resolution of Four Different Branded CT Products
Objective Through scanning head phantom,the spatial resolutions of four different branded CT products were detected,and the differences among the four CT products'spatial resolutions were compared,in order to raise some reasonable suggestions for clinical application.Methods Four different brands of CT machines were used to scan the head phantom,using two different scanning doses(conventional dose and 100mAs),and two different reconstruction algorithms(iterative and FBP)were used to reconstruct the image.The commonly used 10％MTF value was used as the evaluation index for spatial resolution.Results By comparing the MTF values of four images,it can be seen that the spatial resolution of General Electric(GE),Discovery HD-750(gemstone CT)CT is significantly better than the other three CT products.Condusion In order to achieve a high spatial resolution,it is recommended to select GE gemstone CT machine as the first choice in clinical head axial scanning.
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