Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable semi-erect frontal chest radiograph demonstrates intact median sternotomy wires , and right IJ CVL tip in the upper right atrium unchanged in appearance since previous examination . Interval removal of enteric feeding tube , mediastinal drains , and endotracheal tube . Again seen is a large hiatal hernia , partially fluid - filled . The lungs are hypoinflated with bibasilar atelectasis and small bilateral pleural effusions . Persistent retrocardiac and left lower lobe opacity is noted . No pneumothorax .
    OUTPUT:
    
1 . Large hiatal hernia , partially fluid - filled . Of note patient is at increased risk for aspiration . 2 . Hypoinflated lungs with bibasilar atelectasis and small stable bilateral pleural effusions . 3 . Persistent retrocardiac and left lower lobe opacity is most consistent with atelectasis however differential includes pneumonia and aspiration pneumonia in the appropriate clinical setting .