Purpose : To evaluate the dynamic enhancement patterns of focal hepatic lesions using breath-hold dynamic MRimaging for differential diagnosis. Materials and Method : Thirty three patients (24 men and 12 women, mean age of55 years) with 56 known liver masses on CT scan and US underwent MR imaging with 1.5T. After T1-weighted fastmultiplanar spoiled gradient recalled (FMPSPGR) imaging, breath-hold FMPSPGR images were obtained at 0, 1, 3, 5,and 10 minutes after bolus injection of Gd-DTPA. The cases consisted of 16 hepatocellular carcinomas, 24hemangiomas, 6 metastases, 3 cholangiocellular carcinomas, and 7 hepatic cysts. The dynamic enhancement patternswere evaluated on the basis of initial enhancement study and, the degree of enhancement was also levaluatied.Results : Of 24 hemangiomas, most cases showed centripetal filling-in pattern of enhancement except 3 cases whichshowed homogeneous enhancement pattern on the early dynamic phase. All hemangiomas showed very high signalintensity which persisted to the delayed phase. The eccentric enhancement pattern was the most common type inhemangiomas (63%). Hepatocellular carcinomas had heterogeneous enhancement pattern on early and delayed phase (81,88%) and showed diminished signal intensity on the delayed images. 14 of 16 hepatocellular carcinomas (88%) hadperitumoral halo. Variable enhancement patterns was observed in metastases including progressive centripetalfilling-in pattern (67%). All metastases showed prominent peritumoral halos and low signal intensity.Cholangiocellular carcinomas showed early centripetal filling-in and heterogeneous enhancement pattern on delayedphase. None of hepatic cysts showed enhanced. Conclusions : Dynamic breath-hold MR imaging with Gd enhancementallows accurate assessment of hemodynamic status of hepatic lesions and is useful in differential diagnosis offocal hepatic lerions.