Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size , although with a left ventricular configuration . The mediastinal and hilar contours are unremarkable . The lung volumes are low . There is no pleural effusion or pneumothorax . The lungs appear clear . Minimal degenerative changes are noted along the thoracic spine .
    OUTPUT:
    
No evidence of acute disease .