Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Changes of CABG are noted , with mediastinal clips and sternotomy wires . Pulmonary aeration has improved , with residual mild left lower lobe atelectasis , but no focal consolidation . Heart size is normal . No pleural effusions or pneumothorax .
    OUTPUT:
    
CABG changes . No acute cardiopulmonary process .