Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . A 3 cm ovoid opacity in the left midlung field is compatible with the patient 's known lung mass . There is no pneumothorax or pleural effusion . The cardiac and hilar contours are within normal limits .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . 3 cm opacity in the left midlung field is compatible with the patient 's known lung mass .