1. A method of creating an image from an initial data set, the method comprising: receiving the initial data set; processing the initial data set with a processing device by creating an estimated image value for each voxel in the image by iteratively deriving the estimated image value through application of a majorize-minimize principle to solve an l 1 -regularized least-squares estimation problem associated with a mathematical model of image data from the initial data set; displaying the image using the estimated image value of individual voxels of the image.