Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Within the limitations above , the lungs are clear though hyperinflated . There is no effusion or pneumothorax . The heart size is normal . The aorta is somewhat tortuous , and measures up to 4 .8 cm along its descending portion , and 4 .9 cm at the arch . There is degenerative change of the acromioclavicular and glenohumeral joints bilaterally . The patient is osteopenic .
    OUTPUT:
    
1 . No acute chest pathology . 2 . Likely aortic aneurysm , although not well evaluated on radiography and which would be better evaluated on a non-emergent basis with cross - sectional imaging .