Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lungs are hyperinflated and clear aside from a linear density in the left mid lung which could represent a focus of scarring or atelectasis . No focal consolidation , large effusion or pneumothorax . The heart size is top - normal . No signs of congestion or edema . Imaged bony structures are intact . Mediastinal contour is normal .
    OUTPUT:
    
Top normal heart size , hyperinflated lungs likely reflect COPD , left mid lung linear density likely scarring or atelectasis . If symptoms persist , a nonemergent chest CT may be performed to further assess .