Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Low lung volumes are present . The heart size remains mildly enlarged . Mediastinal and hilar contours are stable . There is crowding of the bronchovascular structures . Patchy opacities in the lung bases may reflect atelectasis though aspiration or infection can not be excluded . No pleural effusion or pneumothorax is seen . There is diffuse gaseous distention of bowel loops as well as the stomach within the upper abdomen . Diffuse demineralization of the osseous structures is noted with degenerative changes identified in both glenohumeral joints .
    OUTPUT:
    
Low lung volumes . Patchy opacities in the lung bases could reflect atelectasis though infection or aspiration are not excluded . Diffuse gaseous distention of the stomach and bowel loops within the imaged upper abdomen .