Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is mildly rotated . The lungs are well expanded and clear . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Surgical clips in the right upper quadrant are likely from prior cholecystectomy . Degenerative changes about the right AC joint are noted .
    OUTPUT:
    
Clear lungs . No specific radiographic evidence of pneumonia or pulmonary edema .