Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower compared to the previous exam . This accentuates the size of the cardiac silhouette which is top normal . Mediastinal and hilar contours are otherwise unremarkable . Crowding of bronchovascular structures is present without overt pulmonary edema . Patchy opacities in the lung bases likely reflect areas of atelectasis in the setting of low lung volumes . No focal consolidation , pleural effusion or pneumothorax is present . Several clips are noted projecting over the right upper quadrant of the abdomen , compatible with fiducial markers . Additionally within the left upper quadrant is a gastric lap band , in unchanged position .
    OUTPUT:
    
Low lung volumes with patchy bibasilar airspace opacities , likely atelectasis . Infection is not completely excluded in the correct clinical setting .