Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal contours are within normal limits . The lungs are clear . There appears to be oligemia to the right lung base with a cut off of the right lower lobe pulmonary artery ( ___ 's sign ) , suspicious for a pulmonary embolus . Prominence of the hila is noted bilaterally . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Oligemia of the right lower lobe suggestive of pulmonary embolus . CTA of the chest is recommended for further evaluation .