Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aortic knob is calcified . The mediastinal and hilar contours are unremarkable . Low lung volumes are present with patchy opacities demonstrated in the lung bases , likely atelectasis . Crowding of bronchovascular structures without overt pulmonary edema is present . There is no focal consolidation , pleural effusion or pneumothorax identified . Marked gaseous distension of bowel loops within the upper abdomen are noted . Remote fracture of the right seventh posterolateral rib is noted .
    OUTPUT:
    
1 . Bibasilar patchy opacities , likely atelectasis in the setting of low lung volumes . Please note that aspiration or infection can not be completely excluded in the correct clinical setting . 2 . Marked gaseous distention of bowel loops within the upper abdomen .