Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased interstitial markings are seen throughout the lungs , worse at the bases . The appearance is not dramatically different from prior exam . There is no definite superimposed consolidation . Cardiac silhouette is grossly unchanged . Atherosclerotic calcifications noted at the aortic arch . No acute osseous abnormalities . Surgical clips project over the abdomen .
    OUTPUT:
    
Diffuse abnormality throughout the lungs compatible with patient 's history of interstitial lung disease . No definite superimposed acute process noting that subtle changes could easily be obscured .