Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are unchanged . There is no large right pleural effusion . There is no pneumothorax . Again seen are bilateral lower lung opacities , left greater than right , not significantly changed compared to prior . Left chest port is in unchanged position with tip in the low SVC .
    OUTPUT:
    
Similar appearance compared to most recent prior radiograph with bibasilar opacities , left greater than right . This may represent atelectasis , aspiration , or pneumonia . Clinical correlation to left lower lobe signs and symptoms is recommended . Lateral view would also be helpful for further characterization .