Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple median sternotomy wires are noted . The mediastinal contours are within normal limits . There are aortic arch calcifications . The cardiac silhouette is borderline enlarged . The bilateral hila are within normal limits . There are low lung volumes . There is mild pulmonary vascular congestion without pulmonary edema . Right cardiophrenic angle opacity likely reflects crowding of normal bronchovascular structures . There is no focal consolidation . There is no pneumothorax . Equivocal trace right pleural effusion .
    OUTPUT:
    
Lung volumes . Mild pulmonary vascular congestion without overt edema . Equivocal trace right pleural effusion . No focal consolidation .