1. A method for displaying image data, comprising: utilizing a processor to access and execute one or more processor-executable routines encoded on a memory to perform the steps of: estimating a degree of confidence of an image based on data obtained from one or more sources, wherein estimating the degree of confidence of the image comprises registering two or more gated images to generate two or more registered images; generating a confidence map, wherein the confidence map conveys a respective degree of confidence in the image at one or more locations in the image, wherein generating the confidence map comprises generating a respective confidence map for each registered image of the two or more registered images, and wherein each respective confidence map conveys a quantitative measure of confidence for each voxel value of the corresponding registered image; and displaying a final image, wherein the final image is derived from at least the image and displays data relating to an intensity value at the one or more locations and a degree of confidence of the data, and wherein the final image is derived from at least the two or more registered images.