Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior film , the tip of the aortic balloon pump appears to lie higher . Though the aortic knob is not well delineated , it appears to lie at the top of the expected location of the aortic knob . ET tube tip approximately 3 .9 cm above the carina . NG tube , beneath the diaphragm , with tip overlying fundus . Catheter from an inferior approach , question Swan - Ganz catheter , with tip overlying the region of the main pulmonary artery . Compared to the prior study , there may have been slight leftward shift of the mediastinum . Again seen are diffuse patchy opacities throughout both lungs , most pronounced in the upper zones , with relative sparing of the lower zones . Density of the left upper zone is more confluent than on the prior study . There are not fully characterized , but could represent an atypical distribution of CHF with pulmonary edema or other alveolar infiltrates .
    OUTPUT:
    
1 . Positioning of aortic balloon pump is thought to be high -- ___ see comments above . This has been subsequently repositioned , as seen on a radiograph from ___ at 08 : 15 . 2 . Possible slight interval leftward shift of the mediastinum , suggesting the presence of some volume loss on the left . 3 . Dense , somewhat patchy , bilateral alveolar infiltrates , with upper zone predominance . This is not fully characterized . In the appropriate clinical setting , this could represent atypical distribution of pulmonary edema , ARDS , or other causes of alveolar infiltrates . Possibility of a component pleural fluid or apical capping can not be excluded . If clinically indicated , chest CT may help for more complete characterization .