Gadolinium-enhanced MR Imaging of the Liver: Optimizing Imaging Delay for Hepatic Arterial and Portal Venous Phases—A Prospective Randomized Study in Patients with Chronic Liver Damage

Biphasic imaging with k space centered at 10-15 and 50 seconds or later after arrival of contrast material in the abdominal aorta may be the optimal technique to obtain ideal contrast enhancement. Empirically, delays of 28-34 and 68 seconds or later after initiating contrast material injection may be effective for biphasic imaging.