Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographdemonstrates well expanded lungs . No CHF or focal infiltrate detected . . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are within normal limits .
    OUTPUT:
    
Chest x-ray examination within normal limits . No acute pulmonary process identified .