Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and coronary artery bypass surgery . Stable appearance of cardiomediastinal contours in the post-operative setting , allowing for technical differences between the exams . Previously reported pulmonary vascular congestion has resolved , and a focus of increased opacity in the right lung base medially has slightly improved . Minimal residual atelectasis is present at the left lung base , and note is made of persistent small pleural effusions .
    OUTPUT:
    
Improved pulmonary vascular congestion and bibasilar opacities with residual atelectasis and / or consolidation at the right lung base medially .