Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small bilateral pleural effusions are not significantly changed . Severe left basilar atelectasis is unchanged while minimal right basilar atelectasis is improved . The lungs are otherwise clear . Mild cardiomegaly is unchanged . There is no pneumothorax . The mediastinal contours are normal aside from unfolding of the descending thoracic aorta , as before . The patient is status post midline sternotomy with mitral and tricuspid valve repairs .
    OUTPUT:
    
1 . Unchanged small bilateral pleural effusions . 2 . Unchanged severe left basilar and improved minimal right basilar atelectasis . 3 . Unchanged mild cardiomegaly .