1. A method for generating a Positron Emission Tomography (PET) image, said method comprising: defining a scan window having a predetermined length along an examination axis of a PET imaging system, the scan window corresponding to a region of interest to be continuously scanned by the PET imaging system; defining at least two data bins corresponding to two separate scan regions within the scan window; defining a transition region that overlaps a portion of each of the two separate scan regions, the transition region having a width that is shorter than a length of the scan window; binning emission data acquired within the transition region into the two data bins; binning emission data acquired from outside the transition region into one of the two data bins; and reconstructing an image using the emission data in the two data bins.