Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The cardiomediastinal and hilar contours are within normal limits . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . Chest radiograph is not sensitive for the detection of nondisplaced rib fractures .
    OUTPUT:
    
No acute intrathoracic process . Low lung volumes .