Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-upright portable view of the chest demonstrates low lung volumes . Bibasilar opacities most likely represent atelectasis . Small left pleural effusion is present . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Round opacity projecting over the hilar and cardiac silhouette is no longer visualized compatible with patient 's history of cyst resection . No pneumothorax . Right - sided chest tube is in place . Partial imaged upper abdomen is unremarkable .
    OUTPUT:
    
Bibasilar opacities , likely atelectasis and small left pleural effusion .