Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right midline catheter terminates medial to the mid right humerus . Small right pleural effusion with adjacent atelectasis , and perihilar opacity likely representing pulmonary edema are better evaluated on chest radiograph performed earlier this same day . A pacemaker is partially visualized .
    OUTPUT:
    
A right midline catheter terminates at the level of the mid humerus .