Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior exam , there is no significant change . Again , there is left lower lung scarring and thickening of the pleural surface . The lungs are , otherwise , clear without consolidation or edema . There is no pneumothorax . The mediastinal contours are normal . The heart size is at the upper limits of normal . Sternotomy wires are intact . Mediastinal clips reflect changes from a prior CABG .
    OUTPUT:
    
No acute cardiopulmonary process .