Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . There are low lung volumes with bibasilar opacities which likely represent atelectasis and bronchovascular crowding . Please note given this appearance , lower lung consolidation / pneumonia is difficult to exclude . No pleural effusion or pneumothorax . Heart size is top normal . Mediastinal contour is unremarkable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Bibasilar opacities most likely represent a combination of atelectasis and bronchovascular crowding , though pneumonia can not be excluded . Please refer to subsequent CTA for further details including findings of extensive pulmonary embolism .