Purpose: To determine the value of Gd-DTPA enhanced fat-suppression(GEFS) MR imaging in the characterizationand differentiation of benign from malignant ovarian tumors. Materials and Methods: MRI findings of thirty-sevenpatients with surgically proved 44 ovarian tumors (30 benign, 14 malignant) were studied retrospectively. MRimaging with conventional spin echo (CSE ; T1-weighted image TR/TE 450/20, T2-weighted image TR/TE 3500/30, 90) andGEFS were performed with a 1.5T GE signa. MRI findings of tumors including cystic or solid, wall and septalthickness, necrosis, invasion to adjacent organ, ascites and lymphadenopathy were assessed separately by using CSEand GEFS images, and then tumors were characterized as benign or malignant. Results: Comparing with CSE image, GEFS MR image showed better visualization of solid component in 5 malignant lesions, wall thickness in 5 malignantand 1 benign lesions, septal thickness in 3 malignant and 1 benign lesions, necrosis in 1 malignant lesion, andadjacent soft tissue invasion in 5 malignant lesions. Correct characterization of malignant tumors was increasedfrom 71% on CSE image to 93% on GEFS image. However, correct characterization of benign tumors was 93% on bothimages. Conclusion: GEFS MR imaging could be useful for characterization of ovarian tumors, especially inmalignant cases, and employed for differentiation of benign from malignant tumors.