Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right central venous access catheter terminates in the mid SVC . Prior imaging taken during placement of port demonstrated tip in the right atrium , however , it is unclear if this represents the final positioning of the tip . The cardiomediastinal and hilar contours are normal . There is persistent elevation of the left hemidiaphragm . Atelectasis at the left lung base has improved since ___ . Lungs are otherwise clear . No pleural effusion or pneumothorax .
    OUTPUT:
    
Right venous catheter tip terminates in the mid SVC , prior imaging demonstrated tip in the right atrium , however it is unclear if this represents the final positioning of the tip . Clinical findings could be related to thrombus development in the right atrium or clot propagating along the catheter tip . If further investigation is warranted , an ECHO or TEE could be performed . These findings were discussed with ___ by ___ via telephone on ___ at 12 :22 p .m . , at time of discovery .