Iodinated contrast (Ultravist 370, Berlex Imaging, Wayne, NJ) was injected using a dual-syringe injector (Stellant D, Medrad, Indianola, PA) with an 18-gauge needle or larger in the antecubital vein.

• 碘化对比剂用一个18单位的双重注射的注射器或者更大从肘前静脉注入。