1. A method for improving quality in a positron emission tomography image, comprising: normalizing each pixel in a sinogram of a positron emission tomography study, the pixel normalized by dividing each pixel value by the square-root of its absolute value; generating a PCA sinogram as a function of performing principal component analysis on the normalized sinogram; and reconstructing the positron emission tomography image as a function of a reconstruction method applied to the PCA sinogram.