Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . There is mild linear atelectasis at the left base . A trace left pleural effusion has slightly enlarged . Heart size is exaggerated by AP technique and likely top normal . There is no pulmonary edema .
    OUTPUT:
    
Trace left pleural effusion has enlarged . Mild atelectasis at the left base . No focal consolidation .