Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is limited due to patient rotation . The heart size is at least mildly enlarged , and the aorta remains tortuous . There is a linear opacity within the left lung base likely reflective of atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . Severe degenerative changes of the right glenohumeral joint are present along with a well corticated ossific density adjacent to the distal right clavicle , which could reflect the sequelae of prior injury . Multilevel degenerative changes are noted in the thoracic spine with retrolisthesis demonstrated at the thoracolumbar junction , not significantly changed in the interval . Partially imaged is lumbar spinal fusion hardware . Deformity of the right thoracic rib cage suggests prior trauma .
    OUTPUT:
    
Limited exam . Linear atelectasis in the left lung base . Otherwise no acute cardiopulmonary abnormality .