Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . The lungs demonstrate mildly increased interstitial markings bilaterally . There is no large confluent consolidation or effusion . Cardiac silhouette appears slightly enlarged , likely accentuated by AP technique and relatively lower inspiratory volumes . Old posterior right rib fractures identified . No acute osseous abnormality detected .
    OUTPUT:
    
Increased interstitial markings throughout the lungs may represent interstitial edema versus chronic underlying interstitial lung disease , similar to previous exam .