Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and aortic valve replacement . Heart size is mildly enlarged but unchanged . The aorta is diffusely calcified and mildly tortuous . Hilar contours are similar , with mild pulmonary vascular congestion . No frank pulmonary edema is present . Patchy atelectasis is noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are seen in the thoracic spine . Multiple clips project over the right upper chest .
    OUTPUT:
    
Mild bibasilar atelectasis and mild pulmonary vascular congestion , not substantially changed in the interval .