Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate cardiomegaly . The hilar and mediastinal contours are normal . The lungs are well expanded and clear , without consolidation or pulmonary edema . No pleural effusion or pneumothorax is seen . Linear opacity in the left ___ , ___ represent atelectasis or an impacted bronchus .
    OUTPUT:
    
Moderate cardiomegaly , without pulmonary edema . Linear left ___ opacity , ___ represent atelectasis or an impacted bronchus .