Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bibasilar vague opacities . The lung volumes are low and there is significant overlying soft tissue which limits evaluation . There is likely pulmonary vascular congestion and mild cardiomegaly . Pneumonia at the lung bases can not be entirely ruled out . There is no pneumothorax . There is a possible small right pleural effusion .
    OUTPUT:
    
Bibasilar vague opacities may represent atelectasis given low lung volumes ; however , pneumonia can not be ruled out .