Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal radiograph of the chest demonstrates clear lungs . The cardiac , hilar , and mediastinal contours are normal . No pleural effusion or pneumothorax . Again noted is a suture line in the right mid lung field from prior surgery . Osseous structures are normal .
    OUTPUT:
    
No acute cardiopulmonary process .