Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The nasogastric tube overlies the stomach . The right IJ central line tip overlies the distal SVC . Additional tubing coursing vertically over the visualized portion of the neck chest and upper abdomen may represent a VP shunt . The previously seen IVC filter is not visualized and may lie below the inferior edge of this film . No pneumothorax is detected . Compared with the prior chest x-ray , inspiratory volumes lower . Allowing for this , heart size is probably unchanged . Prominence of the upper zone vessels is again noted and likely accentuated by low inspiratory volumes . No overt CHF . There is atelectasis at both lung bases . Possible minimal blunting of left costophrenic angle -- an early infiltrate in this location is considered less likely . Otherwise , no definite infiltrate or evidence of aspiration .
    OUTPUT:
    
1 . Low lung volumes with bibasilar atelectasis new compared with the prior study . 2 . Small opacity left costophrenic angle of uncertain clinical significance --? Small pleural effusion or early infiltrate .