Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Clear lungs without pneumothorax , pulmonary edema , or pleural effusion . Heart is mildly enlarged with mild aortic tortuosity without aortic dilatation . Mediastinal contour and hila are normal . No bony abnormality .
    OUTPUT:
    
Normal chest radiograph . No pneumonia .