Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Lungs are well expanded and clear . There is no focal consolidation , pleural effusion or pneumothorax . No definite evidence of free air .
    OUTPUT:
    
No acute cardiopulmonary process . No definite evidence of free air . However , if persistent clinical concern , further evaluation with CT should be considered .