Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are normal . The previously noted subtle retrocardiac density has no clear lateral correlate and is likely vascular shadowing . Lungs are otherwise clear . There is no pleural effusion or pneumothorax . A right central venous catheter is unchanged in position with the tip terminating in the low SVC .
    OUTPUT:
    
Previously appreciated retrocardiac density has no clear lateral correlate . No clear evidence of pneumonia . A wet read was entered into the system by Dr . ___ . Please note the changes in the final impression from preliminary results .