Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest . The lungs are well expanded . There is bibasilar atelectasis , but the lungs are otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is enlarged , is similar to prior exams . Left pacemaker is noted with intact lead in appropriate position .
    OUTPUT:
    
No acute cardiopulmonary process . Mild chronic cardiomegaly .