Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The hilar and mediastinal contours are normal . The lungs are well expanded and clear , without consolidation , evidence of contusion or pulmonary edema . There is no pleural effusion or pneumothorax . No obvious displaced rib fractures are seen . If there is concern for a non-displaced rib fracture , a dedicated series can be performed .
    OUTPUT:
    
Mild cardiomegaly . No acute traumatic injury .