Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated with crowding of vasculature . There are bilateral lower lobe heterogeneous opacities with a small left pleural effusion . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the osseous structures are notable for healed left lateral rib fractures .
    OUTPUT:
    
1 . Bibasilar opacities are worrisome for bibasilar pneumonia or aspiration pneumonia . 2 . Small left pleural effusion .