动态增强MRI在乳腺肿瘤检查中的诊断价值及应用研究

目的:分析动态增强MRI在乳腺肿瘤检查中的诊断价值,并探讨其对乳腺肿瘤的应用价值。方法:回顾性分析2007年3月～2010年3月期间收治的乳腺肿瘤患者145例,患者均先进行常规MRI平扫,再对患者进行动态增强MRI扫描。观察两组患者MRI平扫和动态增强MRI征象,测定并比较动态增强MRI扫描良、恶性肿瘤的Emax、Tmax以及Slopemax等值。结果:常规MRI平扫良、恶性肿瘤显示率(22.37%、34.87%)均明显低于动态增强MRI显示率(40.13%、53.95%),差异有统计学意义(P<0.05);良性肿瘤动态参数Emax(76.84±50.55)%和Slopemax(2.75±2.87)%/s均低于恶性肿瘤〔(115.70±28.01)%/s和(6.39±2.03)%/s〕,有统计学意义(P<0.05),Tmax(422.03±119.45)s明显高于恶性肿瘤(157.5±490.91)s,差异有统计学有意义(P<0.05)。结论:动态增强MRI对乳腺肿瘤的检出率和准确率极高,并且可以很好地鉴别良恶性乳腺肿瘤,所以是诊断方法中良好的选择。

Study on diagnostic value and application of dynamic enhancement MRI for examination of breast tumors

Objective:To analyze the diagnostic value of dynamic enhancement MRI for examination of breast tumors,and explore its application value.Methods:A total of 145 patients with breast tumors who were treated in the hospital from March 2007 to March 2010 were analyzed retrospectively,conventional MRI plain scan was conducted at first,then dynamic enhancement MRI was conducted.The signs of MRI plain scan and dynamic enhancement MRI in the two groups were observed;Emax,Tmax,and Slopemax values of dynamic enhancement MRI for benign and malignant breast tumors were measured and compared.Results:The show rates of benign and malignant breast tumors with conventional MRI plain scan were 22.37% and 34.87%,respectively,which were statistically significantly lower than those with dynamic enhancement MRI(40.13%,53.95%)(P<0.05);Emax and Slopemax values of benign breast tumors were(76.84±50.55)% per second and(2.75±2.87)% per second,respectively,which were statistically significantly lower than those of malignant breast tumors(P<0.05),Emax and Slopemax values of malignant breast tumors were(115.70±28.01)% per second and(6.39±2.03)% per second,respectively;Tmax value of benign breast tumors was(422.03±119.45) seconds,which was statistically significantly higher than that of malignant breast tumors(P<0.05),Tmax value of malignant breast tumors was(157.5±490.91) seconds.Conclusion:The detection rates and accurate rate of dynamic enhancement MRI for breast tumors are very high,which can differentiate benign and malignant breast tumors,so it is a good choice among all diagnostic methods.