Comparison of the diagnostic value of MRI diffusion weighted imaging with ultrasound and mammography in the breast disease

Objective To explore the clinical value of diffusion weighted imaging （DWI） in the diagnosis of breast disease ,and compared with ultrasound and mammography .Methods The clinical data of 28 patients who were＆amp;nbsp;pathologically confirmed with breast cancer were retrospectively reviewed .The diagnostic accuracy of DWI ,mammogra-phy and ultrasound , the surface diffusion coefficients （ ADC value ） were statistically analyzed .Results （ 1 ） DWI scan：the diagnostic accuracy of malignant tumor was 90.9%（20/22）,the ADC value of malignant tumor was （0.955 ±0.199） ×10^ -3mm^2/s;the diagnostic accuracy of benign lesions was 83.3%（5/6）,the average ADC value of benign lesions was （1.660 ±0.339） ×10^ -3 mm^2/s,there were statistically significant differences （ t=2.371,P〈0.05）.（2）Mammography：the diagnostic accuracy of malignant tumor was 81.8%（18/22）,the diagnostic accuracy of benign lesions was 33.3%（2/6）.（3） Ultrasound：the diagnostic accuracy of malignant tumor was 86.4%（19/22）,the diagnostic accuracy of benign lesions was 50.0%（3/6）.The diagnostic accuracy of malignant tumor had no significant difference among three techniques （χ^2 =0.752,P〉0.05）,but for the diagnostic accuracy of benign lesions,DWI was better than ultrasound and mammography ,the difference was statistically significant （χ2 =6.146, P〈0.05）.Conclusion For the diagnosis of malignant breast tumors and benign lesions ,DWI is better than ultra-sound and mammography ,which has high clinical application value . Key words: Breast neoplasms; Magnetic resonance imaging; Mammography; Ultrasonography