Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is not enlarged . The cardiomediastinal silhouette is within normal limits . No CHF , focal infiltrate or effusion is detected . No pneumothorax is identified . Minimal pleural - parenchymal thickening is seen at both lung apices , slightly more pronounced on the right . There are mild degenerative changes of the thoracic spine . No rib fracture is detected on these lung technique films . No free air is seen beneath the diaphragm .
    OUTPUT:
    
No acute pulmonary process identified .