Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Again noted is mild elevation of the right hemidiaphragm , unchanged since the prior examination . The cardiac silhouette is top - normal in size . Mild bibasilar atelectasis is noted . There is no definite consolidation . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .