Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes with crowding of vasculature and bilateral lower lobe opacities . No pulmonary edema . No pleural effusion or pneumothorax . The heart is top - normal in size , likely accentuated due to low lung volumes . Mediastinal contour and hila are unremarkable .
    OUTPUT:
    
1 . Low lung volumes with bibasilar opacities may represent atelectasis or aspiration in the appropriate clinical setting . 2 . No pulmonary edema .