Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no pleural effusion , pneumothorax or focal airspace consolidation . The heart size is normal . The left hilus demonstrates a rounded opacity which is indeterminate but likely overlapping vessels . The hilar structures and pleural surfaces are unremarkable . There are no acute osseous abnormalities . The imaged upper abdomen is normal .
    OUTPUT:
    
Rounded prominence of the left hilus is likely vascular , however , given the provided history a CT is recommended for further characterization . These findings were entered into the Critical Results dashboard on ___ .