Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacification noted in the left mid to lower hemi thorax , likely compatible with atelectasis and effusion though difficult to exclude an underlying pneumonia . Also noted , is a subtle reticulonodular opacity in the right lower lung ca n't to lesser extent in the right upper lung which may reflect atypical pneumonia versus aspiration . Heart size can not be assessed . Mediastinal contour is normal . No acute bony injury .
    OUTPUT:
    
Findings as above .