Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Doubt significant change compared with ___ . The heart is not enlarged . Aorta is mildly unfolded . No CHF , focal infiltrate , gross effusion , or pneumothorax is detected . Possible minimal blunting of the costophrenic angles posteriorly does not appear significantly changed . Mild to moderate thoracic spine degenerative changes again noted .
    OUTPUT:
    
No acute pulmonary process identified .