Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . An azygos fissure , normal variant , is re - demonstrated in the right upper hemithorax . Small left pleural effusion is overall unchanged . Blunting of the right costophrenic angle with silhouetting of the lateral aspect of the right hemidiaphragm may reflect a combination of moderate atelectasis and elevated right hemidiaphragm . No definite right pleural effusion , and if present , is minimal / trace . Appearance of the heart and mediastinum are unchanged . No frank pulmonary edema or pneumothorax .
    OUTPUT:
    
1 . Unchanged small left pleural effusion . 2 . Moderate right lung atelectasis . 3 . No pneumonia .