Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and aortic valve replacement . Cardiomediastinal contours are stable in appearance . Slight improvement in pulmonary vascular congestion and decrease in extent of interstitial edema with mild residual edema remaining . Moderate right pleural effusion with loculated intrafissural component appears similar to the prior study , and a small left pleural effusion is also not appreciably changed . Bibasilar areas of atelectasis have slightly improved , however . Small left apical pneumothorax is unchanged , and there is also a questionable tiny right apical pneumothorax .
    OUTPUT:
    
1 . Improving interstitial edema and decreased bibasilar atelectasis . 2 . Unchanged small left apical pneumothorax . Probable tiny right apical pneumothorax . 3 . Moderate right and small left pleural effusion .