Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear without focal opacity , pulmonary edema , pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal . There is no free air beneath the hemidiaphragms . There are degenerative changes of the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .