Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were performed . The diaphragms are flat consistent with hyperinflation . The cardiomediastinal , pleural , and pulmonary structures are unremarkable . There is some linear atelectasis versus scarring at the left lung base . There are no consolidations to suggest pneumonia . There is no pneumothorax or pleural effusion . Degenerative changes of the thoracic spine and median sternotomy wires are again noted .
    OUTPUT:
    
No acute cardiopulmonary process .