Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal , and decrease in size compared to the previous study . Curvilinear lucency about the inferior aspect of the right heart and mediastinum is concerning for small pneumomediastinum . Mediastinal and hilar contours are otherwise unremarkable . Lungs are hyperinflated but clear without focal consolidation . Previously noted pleural effusions have resolved . No pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Findings suggestive of new pneumomediastinum . Otherwise no additional acute cardiopulmonary abnormality include the thorax . Please note that subsequent CT of the chest demonstrated no pneumomediastinum .