Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right hydropneumothorax is unchanged from comparison study approximately 4 .5 hours prior . The air - fluid level is less evident on this study most likely due to differences in patient position . The shift of the mediastinal structures is similarly unchanged , as is the combination of nodules and peribronchial infiltration in the right lower lung . The cardiomediastinal silhouette and hilar contours are unchanged .
    OUTPUT:
    
The right hydropneumothorax is unchanged from 4 .5 hours prior . A preliminary report was given by Dr . ___ .