Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual lumen central venous catheter tip terminates in the proximal right atrium . Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unchanged . There are streaky bibasilar airspace opacities most likely reflective of atelectasis . Blunting of the left costophrenic angle likely reflects a trace left pleural effusion . No pneumothorax or pulmonary vascular congestion is identified . No acute osseous abnormalities detected .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis and small left pleural effusion .