Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The heart is mild - to - moderately enlarged . The mediastinum and hila are within normal limits . Median sternotomy wires and surgical clips appear intact .
    OUTPUT:
    
No acute intrathoracic process . Mild - to - moderate cardiomegaly .