Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is improved aeration of the right lung base . Small bilateral pleural effusions persist and are best appreciated on the lateral view . A focus of linear atelectasis / scarring in the left mid lung is stable . The mediastinum is normal . Hiatal hernia and markedly dextroscoliosis of the thoracolumbar spine are re - demonstrated . The latter which makes assessment of the heart size difficult .
    OUTPUT:
    
Improved aeration of the right lung base .