Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are intact without evidence of dehiscence . The artificial mitral and aortic valves are unchanged without complication . The lungs are hyperinflated but clear . The hila and pulmonary vasculature are normal . No pleural effusions or pneumothorax . Mild cardiomegaly and mediastinal silhouette is unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .