Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged including mild cardiomegaly . There is similar elevation of the left hemidiaphragm with persistent unchanged vague left mid to lower lung opacity which may indicate some degree of chronic atelectasis and , particularly given lack of change , is not suspicious for an acute superimposed process . The lungs appear otherwise clear . Old left - sided rib fractures are also unchanged . There has been no significant change .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .