Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear bilaterally without pleural effusion . Mild enlargement of cardiac silhouette with normal mediastinal contours and hila . No lymphadenopathy . Aortic calcifications and mild scoliosis noted without additional bony abnormality .
    OUTPUT:
    
Normal chest radiograph without radiographic evidence of tuberculosis .