1. A processor-implemented method for providing a diagnostic image as a combination of two or more images, executed at least in part using a processor, comprising: obtaining at least first and second image data of a subject; analyzing, using the processor, both the first and second image data to identify at least grid orientation and spacing; applying grid suppression to the first and second image data; preprocessing the grid suppressed first and second image data; combining the grid suppressed first and second image data and decomposing the combined data to obtain one or more diagnostic images for display; and displaying, storing or transmitting the one or more diagnostic images.