Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube terminates 6 .3 cm above the carina . The heart is significantly enlarged . The hilar and mediastinal contours are within normal limits . Bilateral airspace opacities seen predominantly at the bases likely represent mild to moderate pulmonary edema however infection should be considered in the appropriate clinical setting . There may be a small right pleural effusion . There is no evidence of pneumothorax .
    OUTPUT:
    
Markedly enlarged heart with likely mild pulmonary edema and a small right pleural effusion . Right basal opacity could also represent infection in the appropriate clinical setting .