1. A method for automated classification of distinction between normal and abnormal lungs with interstitial disease in digital chest radiographs, comprising: sampling plural regions of interest (ROIs) of a subject digital radiograph; producing digital data indicative of the texture of each of said ROIs; determining from the digital data of each selected ROI texture measures indicative of the lung texture of the respective ROIs; normalizing the texture measures determined in said determining step in relation to predetermined characteristics derived from a data base of normal lungs; and processing normalized texture measures obtained in said normalizing step to determine based on predetermined criteria whether or not a lung image of the subject digital radiograph is normal or abnormal.