ABSTRACT
Objective To explore the value of dynamic contrast -enhanced magnetic resonance imaging in differential diagnosis of benign and malignant ovarian tumors .Methods 50 patients with benign ovarian cancer were selected as the benign group ,and 50 patients with malignant ovarian cancer were selected as the malignant group .All patients underwent dynamic contrast-enhanced magnetic resonance imaging .Results The difference of the time intensity curve ( TIC) curve between the benign group and the malignant group was no statistically significant ( P<0.05),the benign group was mainly type Ⅰ curve,and the malignant group was dominated by type Ⅲ curve.The values of Ve,Kep and Ktrans in the benign ovarian tumors [(0.492 ±0.227),(0.163 ±0.081)min-1,(0.071 ± 0.034) min-1 ] were significantly lower than those in the malignant group [( 0.686 ±0.153 ), ( 0.411 ± 0.214)min-1,(0.282 ±0.110)min-1](P<0.05).The ROC curve under the area of Ve value,Kep value,Ktrans value to identify ovarian benign and malignant were 0.707,0.942,1.000;the best differential value of Ve ,Kep, Ktransfor ovarian benign and malignant tumors were 0.118min-1,0.257min-1,0.546,respectively.The Jorden index,sensitivity,specificity,positive predictive value,negative predictive values of the diagnosis of the ovarian benign and malignant tumors were 0.446,88.84％,57.23％,63.24％and 86.12％,respectively.The Jorden index,sensitivity, specificity,positive predictive value ,negative predictive values of Kep in the diagnosis of ovarian benign and malignant tumors were 0.804,88.91％,90.87％,89.15％and 90.78％,respectively.The Jorden index,sensitivity,specificity, positive predictive value ,negative predictive values of Ktrans in the diagnosis of ovarian benign and malignant tumors were 1.000,100.0％,100.0％,100.0％,100.0％.Conclusion Dynamic contrast -enhanced magnetic resonance imaging has differential diagnosis value on benign and malignant ovarian tumors .The ovarian benign tumors are mainly type Ⅰcurve,and the ovarian malignant tumors is mainly type Ⅲcurve.Ktrans is the best for differential diagnosis of ovarian benign and malignant tumors .