Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As on prior , increased interstitial markings are seen throughout the lungs compatible with known underlying interstitial process superimposed edema would be difficult to exclude . There is no confluent consolidation . Cardiac enlargement is similar compared to prior . Atherosclerotic calcifications noted at the aortic arch . No acute osseous abnormalities .
    OUTPUT:
    
Diffuse parenchymal abnormality in the lungs suggesting chronic underlying interstitial process . Superimposed edema would be difficult to exclude . No confluent consolidation .