Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is linear atelectasis at the left lung base . No focal consolidation is identified . The cardiomediastinal silhouette and hilar contours are stable . There is no pleural effusion or pneumothorax . Osseous structures are grossly intact .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Atelectasis at the left lung base .