Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable semi-erect chest radiograph was obtained . Aeration of the lungs has improved since ___ . In particular the apices are better aerated . Persistent alveolar opacity remains in a bibasilar predominance . Small right effusion , if any , is unchanged . There is no new abnormality of the heart or mediastinum . There is no pneumothorax or consolidation . An endotracheal tube remains in the upper airway . An enteric catheter extends inferiorly out of field of view . Right - sided PICC line tip terminates in the low SVC . Pacemaker leads are in unchanged positions . Median sternotomy wires are intact .
    OUTPUT:
    
Improved aeration of the apices since ___ . Extensive bilateral dense consolidations remain at the bases . Given rapid improvement , TRALI or ARDS are more likely etiologies than pneumonia .