Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate clear lungs and normal hilar and cardiomediastinal contours . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . Multiple healed rib fractures are again seen on the right .
    OUTPUT:
    
No evidence of pneumonia or other acute process .