Inclusion Criteria:  older than 20 years old scheduled for Gd-EOB-DTPA enhanced liver MRI at a 3T scanner (Premier, GE Healthcare) in our institution signed informed consent  Exclusion Criteria:  younger than 20 years old any absolute/relative contrast indication of Gd-EOB-DTPA enhanced MRI history of transient dyspnea after Gd-EOB-DTPA administration