Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . 4 - mm right lower lobe nodule seen on recent CT is not visualized on this exam . The cardiomediastinal silhouette is unremarkable . The hilar contours are unremarkable . There are no pleural effusions or pneumothoraces seen . The bones are intact .
    OUTPUT:
    
No acute intrathoracic process .