Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal in size . A density projecting adjacent to the right heart border is most consistent with a pericardial cyst , and is unchanged from the prior CT in ___ .
    OUTPUT:
    
No acute cardiopulmonary process .