Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Increased interstitial markings seen throughout the lungs bilaterally . There is no definite confluent consolidation . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Increased interstitial markings throughout the lungs which is most suggestive of a chronic interstitial process or fibrosis . Component of interstitial edema or atypical infection or difficult to exclude .