Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . The heart appears to be normal in size and configuration . The trachea is midline and cardiomediastinal contours are within normal limits . There is slightly more crowding within the right central pulmonary vessels on this study as compared to the prior examination ; however , this is likely due to the fact that in the current study the inspiratory effort is not as full . There is a small opacity seen overlying the heart on the lateral radiograph , which appears to be stable from the prior study . No pleural effusions or pneumothorax . The bony structures are intact .
    OUTPUT:
    
No significant interval changes or evidence of pneumonia