Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . There is generalized faint interstitial abnormality bilaterally . Apparent mediastinal widening may be artifactual due to lordotic positioning . The heart is not enlarged . There is no pleural effusion or pneumothorax . There is mild bibasilar atelectasis .
    OUTPUT:
    
1 . Generalized interstitial abnormality bilaterally may reflect history of COPD . There is no convincing evidence of pneumonia . 2 . Apparent widening of the mediastinum is likely artifactual due to lordotic positioning .