Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right subclavian venous catheter has been placed , since the prior study , which terminates in the right atrium . The cardiac , mediastinal and hilar contours appear unchanged . There is again mild elevation of the right hemidiaphragm . On this study , there is a new substantial but plate - like opacity in the right mid lung , which is highly suggestive of atelectasis ; an infectious cause seems unlikely to explain this appearance . The left lung is clear . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
Status post interval placement of dialysis catheter . Focal right lung opacity , suggestive of atelectasis ; short - term follow - up radiographs may be helpful .