Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual lumen central venous catheter and left - sided subclavian central venous catheter terminate in the low SVC . Lung volumes are low . This accentuates the size of the cardiac silhouette which appears mildly enlarged . Mediastinal contours are grossly unchanged . Crowding of the bronchovascular structures is noted without overt pulmonary edema . Streaky opacities in the lung bases likely reflect atelectasis . No pleural effusion or pneumothorax is identified . " Rugger ___ " appearance of the thoracic spine is compatible with renal osteodystrophy .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .