1. A method for generating computed-tomography image, comprising: exposing an object with x-rays at a plurality of scans at a position of said object to obtain projection data at a plurality of views; generating first images serially in time using the projection data; generating second images by smoothing respective pluralities of said first images; generating a gradient image based on at least one of said first images; determining a contribution of each pixel in a display image from the first image and from the second image using the gradient image; and generating the display image by weight blending one of said first images and one of said second images based on the contribution.