Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild opacity in the lingula likely chronic atelectasis , similar to previous imaging . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unchanged with stable cardiomegaly . Surgical clips again noted in left anterior breast . Interval placement of a single lead left pectoral pacemaker with lead placement in right ventricle .
    OUTPUT:
    
No evidence of pneumonia . Cardiomegaly . Chronic atelectasis of the lingula , unchanged from previous