Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs improving aeration at the base of the right upper lobe , but still with a fair amount of atelectasis and persistent volume loss with rightward shift of the mediastinum . The loculated hydropneumothorax is smaller and filling with fluid . The left lung is well aerated and clear . There is no left pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Improving aeration at the base of the right upper lobe , but still with a fair amount of atelectasis and persistent volume loss . 2 . Smaller loculated hydropneumothorax , which is filling with fluid .