Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no pneumothorax or pleural effusion . Heart size is normal . There is bibasilar atelectasis . A left shoulder arthroplasty is noted . There are severe degenerative changes at the right glenohumeral joint . Cholecystectomy clips are noted . There are calcifications seen within the aortic arch . There is a hiatal hernia .
    OUTPUT:
    
No acute cardiopulmonary process .