Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Subtle linear densities in the left lower lung likely reflect scarring or atelectasis and appear unchanged from prior exam . No focal consolidation concerning for pneumonia . No edema . No large effusion or pneumothorax . Cardiomediastinal silhouette is normal . Imaged osseous structures appear grossly intact .
    OUTPUT:
    
No signs of pneumonia .