Gd-EOB-DTPA-enhanced magnetic resonance imaging features of hepatic hemangioma compared with enhanced computed tomography

Figure 1 A 49-year-old man with hepatic hemangioma. The arterial, portal venous, and equilibrium phases on enhanced computed tomography and gadolinium-ethoxybenzyl-diethylenetriaminpentaacetic acid-enhanced magnetic resonance imaging. A: The hemangioma (arrow) shows peripheral nodular enhancement, and the enhancement degree was classified as visual grade 5 (prominently greater enhancement than in the liver parenchyma); B: The hemangioma (arrow) shows fill-in enhancement, and the enhancement degree was classified as visual grade 5 (prominently greater enhancement than in the liver parenchyma); C: The hemangioma (arrow) shows prolonged enhancement, and the enhancement degree was classified as visual grade 4 (mildly greater enhancement than in the liver parenchyma); D: The hemangioma (arrow) shows peripheral nodular enhancement, and the enhancement degree was classified as visual grade 4 (mildly greater enhancement than in the liver parenchyma); E: The hemangioma (arrow) shows fill-in enhancement, and the enhancement degree was classified as visual grade 4 (mildly greater enhancement than in the liver parenchyma); F: The hemangioma (arrow) did not show prolonged enhancement, and the enhancement degree was classified as visual grade 1 (prominently decreased enhancement compared with the liver parenchyma).

Figure 2 Temporal profiles of the signal intensity ratios on gadolinium-ethoxybenzyl-diethylenetriaminpentaacetic acid-enhanced magnetic resonance imaging and the attenuation values on enhanced computed tomography. A: Tumor-muscle and liver-muscle signal intensity ratios (SIRs) before and after gadolinium-ethoxybenzyl-diethylenetriamin-pentaacetic acid (Gd-EOB-DTPA) injection; B: The attenuation values in the tumor and liver parenchyma before and after nonionic contrast material injection. Tumor-muscle SIR = signal intensity of the hemangiomas/signal intensity of the paravertebral muscle; Liver-muscle SIR = signal intensity of the liver parenchyma/signal intensity of the paravertebral muscle. PRE: Precontrast scan; AR: Arterial phase; PV: Portal venous phase; EQ: Equilibrium phase; HB: Hepatobiliary phase; HU: Hounsfield unit.