Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild elevation of the right hemidiaphragm , similar compared to ___ . Otherwise , the lungs are clear . The cardiomediastinal silhouette and hila are normal . There is no pleural effusion and no pneumothorax .
    OUTPUT:
    
No acute cardiothoracic process . Unchanged slight elevation of the right hemidiaphragm .