Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding PA and lateral chest examination of ___ . The patient is status post sternotomy and bypass surgery performed at our institution on ___ . On post-operative followup chest examinations , he had bilateral basal plate atelectasis and moderate amount of pleural effusions . On the next preceding post - discharge PA and lateral chest examination of ___ , there existed small amounts of pleural effusion remaining in the posterior pleural sinuses , a moderate enlargement of the heart size was noted post-operatively and thin plate atelectasis were noted on the bases . No acute pulmonary infiltrates or pulmonary congestion was seen . On the present examination , the bilateral plate atelectasis have further regressed . No new parenchymal infiltrates are present . The lateral and posterior pleural sinuses are free from any fluid accumulation and no pneumothorax exists in the apical area on the frontal view . Similar as on all previous chest examinations , the patient has orthopedic metallic stabilization devices in the lower cervical spine .
    OUTPUT:
    
Basal plate atelectasis on followup examination . No evidence of new acute infiltrates or pneumothorax .