The features of breast tumor by dynamic enhanced magnetic resonance imaging

Objective To investigate the features of breast benign or malignant tumor by dynamic enhanced MRI. Methods Thirteen patients with 14 breast cancer foci and 10 patients with 10 benign breast foci, which all diagnosed by pathology were recruited in the study. The patients underwent plain scanning and dynamic enhanced scanning combined with subtraction technique by 1.5T MRI of PHILIPS intera Achieva. The enhanced time-signal curve, the first, second, fourth and eighth minute enhanced rate, the peak enhanced rate and the peak enhanced time were used to analyze the features of benign or malignant tumor. Results Dynamic enhanced subtraction displayed all the foci. The enhanced time-signal curves of malignant tumor contained three groups: type A 7.1% (1/14), type B 78.6% (11/14),type C 14.3%(2/14). And the enhanced time-signal curves of benign tumor contained two groups: type B 30.0% (3/10), type C 70.0% (7/10). There was significant difference in early enhanced rate (the first, second minute) between benign or malignant tumor (P0.05); while there was no significant difference in enhanced rate and the peak enhanced rate at the fourth and the eighth minute (P0.05). If the peak enhanced time was within 2 minutes all cases were malignant; if in 2 to 4 minutes, 50.0% cases were malignant tumor and 50.0% were benign tumor, if over 8 minutes 20.0% were malignant tumor and 80.0% were benign tumor. Conclusion Morphology combined with the dynamic enhanced curve, the early enhanced rate and the peak enhanced time of MRI can increase the diagnostic accurate rate of breast tumors.