Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Changes of CABG with median sternotomy wires and mediastinal clips . Pulmonary aeration has improved , without focal consolidation . Stable small pleural effusions . Heart size is top normal . Aorta is mildly tortuous and calcified . Mild acromioclavicular arthropathy .
    OUTPUT:
    
No acute process . Persistent small pleural effusions .