Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . Discontinuities of sternal wires appear unchanged . There is an apparently closed tracheostomy with a stent and overlying clips , but correlation with current status and any history of instrumentation is recommended . The cardiac , mediastinal and hilar contours appear unchanged including mild cardiomegaly . The lungs appear clear . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .