1. A method for facilitating comparison of image data from a given medical imaging protocol with archive image data, comprising: obtaining subject image data from a respective scan of a subject using the medical imaging protocol; providing the subject image data to a processor that performs Gaussian filtering; obtaining archive image data differing from the subject image data in a given variable of said Gaussian filtering; reducing a difference caused by said variable between the archive image data and subject image data for said reception scan, independently of scans of the subject other than the respective scan, by, for at least one of the archive image data and the subject image data, obtaining reference image data from a scan of a reference object using the medical imaging protocol used to capture the archive or subject image data, comparing the obtained reference image data of the reference object to standard reference image data for the reference object, and configuring said Gaussian filtering to modify the obtained reference image data to reduce a difference between the obtained reference image data and the standard reference image data; applying the Gaussian filter to modify one of the subject image data and the archive image data to reduce the difference; and displaying the modified archive or subject image data for comparison with the subject or archive image data.