Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . No prior . The lungs are clear . Costophrenic angles are sharp . Cardiac silhouette is at upper limits of normal . Degenerative changes noted in the T - spine . No free air is seen below the diaphragm .
    OUTPUT:
    
No acute intrathoracic process . No free air below the diaphragm .