Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The cardiac silhouette is mildly enlarged . Reticular opacities are seen at the bilateral lung bases , not significantly changed since the prior examination , likely related to chronic lung disease . The basilar opacities are also noted , most likely representing atelectasis . No definite consolidation is seen . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .