Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen are multiple median sternotomy wires and mediastinal surgical clips . Aortic arch calcifications are again noted . There is stable mild to moderate enlargement of the cardiac silhouette , including prominent soft tissue density in the region of the azygous vein . Opacification of the lower left lung likely relates to subsegmental relaxation atelectasis in the setting of a small left pleural effusion . Bandlike atelectasis is also noted at the right lung base medially . Otherwise , the lungs are clear without focal consolidation . There is upper zone redistribution , without overt CHF . Minimal blunting of the right costophrenic angle without frank effusion . No pneumothorax detected . Slight asymmetry of the hemi thoraces is suggested , with the left lung apex lying above the right . The right hemidiaphragm is probably slightly elevated , but not significantly changed .
    OUTPUT:
    
1 . Cardiomegaly , with upper zone redistribution , but no overt CHF . Increased soft tissue is again noted in the region of the azygous vein . 2 . Small right and possible small left effusion . 3 . Bibasilar atelectasis . No definite consolidation .