1. A computed tomography system comprising an x-ray source, an x-ray detector aligned with said x-ray source, and a processor coupled to said x-ray detector, said processor programmed to: generate a digital image from the output of the x-ray detector; and dynamically magnify the digital image to provide a magnified image, wherein to dynamically magnify the digital image, the processor is configured to execute at least one of (a) a two pass algorithm in which each of the passes represents interpolation in the x and y directions respectively, and (b) a bilinear interpolation algorithm including a two dimensional convolution filter.