Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear except for linear left basal scarring / atelectasis . No pleural effusion or pneumothorax is seen . No pulmonary consolidation is detected . Mild prominence of the interstitial markings likely represents changes of chronic CHF . Cardiomediastinal and hilar contours are unremarkable , except for mildly tortuous thoracic aorta . Moderate degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary pathology .