Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lung is well expanded and clear . Opacification of the left hemithorax with silhouetting of the left heart border and left hemidiaphragm and leftward mediastinal shift suggests complete collapse of the lingula and left lower lobe . Unchanged intact sternotomy wires , mitral valve replacement , and peripherally calcified dilated left atrium .
    OUTPUT:
    
Complete collapse of the lingula and left lower lobe . In view of extensive pulmonary changes , it is impossible to exclude super infection .