Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two sequential portable AP upright chest films ___ at 17 12 are submitted .
    OUTPUT:
    
There has been interval placement of a new nasogastric tube which courses below the diaphragm and the tip projecting over the stomach . There is persistent opacity at the right base which likely reflects a combination of pleural effusion with compressive atelectasis of the lower and middle lobes . In addition , there is increasing opacification in the retrocardiac region which could reflect left lower lobe atelectasis . Superimposed infection can not be entirely excluded and therefore clinical correlation is recommended . Overall cardiac and mediastinal contours are stable . No pulmonary edema or pneumothorax . Bilateral calcified saline breast implants .