Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased retrocardiac density and subtle increased opacity of the right lower lung . No pleural effusion , pneumothorax , or pulmonary edema is detected . Evidence of emphysema corresponds with recent chest CT findings . Cardiomegaly persists . Calcified tortuous aorta is again noted .
    OUTPUT:
    
Increased bibasilar opacities , which likely reflect aspiration ; atelectasis and early infection are also possibilities .