Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Low lung volumes seen on the current exam . There are increased reticular markings in the lungs bilaterally , similar to priors . Given stability , these are most suggestive of chronic underlying process , either interstitial disease or scarring potentially from aspiration . Cardiomediastinal silhouette is within normal limits . Multiple old left rib fractures are identified . Orthopedic screws seen in the right humeral head and extensive chronic changes seen at the left shoulder . Compression deformities seen in the lower thoracic and upper lumbar spine , not definitely new since prior . There is no free air below the diaphragm .
    OUTPUT:
    
No definite acute cardiopulmonary process . No focal consolidations to suggest pneumonia . Other details as above .