Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal and hilar contours are stable with the thoracic aorta appearing mildly tortuous . Pulmonary vasculature is normal . Atelectasis or scar in the right lung base is unchanged , and the remainder of the lungs are clear . No pleural effusion or pneumothorax is seen . Eventration of the right hemidiaphragm is unchanged . Marked degenerative changes of the left glenohumeral and AC joints are noted . Old right - sided rib fractures are again seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .