Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a dual - lead pacemaker / ICD device , which appears unchanged . The cardiac , mediastinal and hilar contours appear stable . Calcified pleural plaques along the left mid to upper left hemithorax appear similar . The degree of pleural thickening and a possible small effusion of the left appear unchanged since the more recent of the two prior radiographs . A left basilar opacity has continued to improve , however .
    OUTPUT:
    
No evidence of acute disease . Better aeration at the left lung base .