Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The aorta is calcified . The mediastinal and hilar contours appear unchanged . A trace pleural effusion is suggested by blunting of each posterior costophrenic sulcus , but not substantial . Background lung markings are mildly coarsened with no evidence for superimposed acute abnormality . Degenerative changes are noted along each acromioclavicular joint . The acromiohumeral interval is narrowed on the left . Small osteophytes are noted throughout the thoracic spine . The bones are probably demineralized .
    OUTPUT:
    
No evidence of acute disease .