Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographdemonstrates well expanded lungs . No CHF , focal infiltrate , pleural effusion or pneumothorax is detected . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
Chest x-ray examination within normal limits , without acute pulmonary process . No pneumothorax detected . No displaced rib fracture identified . Although no fracture or other bone abnormality is seen , conventional chest radiographs are not appropriate for detection or characterization of chest cage lesions . Any focal findings should be clearly marked and imaged with either bone detail views or CT scanning .