Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right internal jugular central line terminates in the right atrium and should be retracted for more optimal positioning . Lung volumes are low . There is abnormally widened appearance of the mediastinum which could reflect suboptimal imaging technique . There are no pleural effusions or pneumothorax . Heart size is unchanged . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
1 . Right internal jugular central line terminates in the right atrium . Recommend retracting by 3 cm to be at the cavoatrial junction . 2 . Mediastinal widening , new from prior , may reflect portable technique . Recommend repeat with more optimal technique to resolve this finding . Alternatively , if there is concern for mediastinal hematoma CT is recommended .