Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable including mild cardiomegaly with a left ventricular configuration to the heart shape . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes affect the lower thoracic spine , as before .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .