Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the chest radiograph obtained 1 day prior , no significant changes are appreciated . Lung volumes remain very low with prominent elevation of the right hemidiaphragm . Bibasilar atelectasis and mild pulmonary vascular congestion are unchanged . There has been interval removal of an enteric tube . A right - sided IJ central venous catheter is unchanged in position . Median sternotomy wires are midline and intact .
    OUTPUT:
    
Radiograph not significantly changed since 1 day prior with persistent very low lung volumes , bibasilar atelectasis , and mild pulmonary vascular congestion .