Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest . The lungs are well expanded . Atelectasis is seen in the right bilateral lung bases . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is enlarged . Known tracheal stenosis is noted .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Cardiomegaly .