Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There is flattening of the diaphragms , suggesting chronic obstructive pulmonary disease . Bibasilar atelectasis is seen . Additional right base patchy opacity is seen , which could relate to atelectasis , although underlying infection or aspiration may be present . No large pleural effusion or pneumothorax is seen . The cardiac silhouette is top normal . The mediastinum is unremarkable . Hilar contours are stable .
    OUTPUT:
    
1 . Bibasilar opacities , likely due to atelectasis , increased right base opacity may be due to atelectasis , although underlying infection or aspiration is not excluded . 2 . COPD .