3.0T磁共振在乳腺检查中的初步应用

目的:探讨3.0T磁共振利用体部相控阵线圈进行乳腺检查的临床应用价值.方法:36例乳腺疾病患者中隆乳术后26例,乳腺癌6例,乳腺良性病变4例,均行常规MR T1WI、T2WI和压脂序列T2WI,17例行动态增强扫描,13例行扩散加权成像,并与术后病理结果进行对照分析.结果:36例乳腺疾病患者均能显示显示乳腺结构及邻近组织情况,图像清晰无变形.22例聚丙烯酰胺水凝胶注射隆乳术后患者,注入物于T1WI呈稍低信号、T2WI呈高信号,在脂肪抑制T2WI上显示最清晰,呈均匀高信号;4例角鲨烯注射液隆胸术后,注入物在T1WI和T2WI上呈小颗粒状脂肪信号影.6例乳腺癌于DWI上呈明显高信号,动态增强曲线呈早期信号快速上升,中晚期信号强度逐渐降低表现;4例发现腋窝淋巴结转移.4例乳腺良性病变,动态增强曲线呈逐渐上升改变.结论:3.0T磁共振结合体部相控阵线圈可显示隆胸材料的性质和分布,常规MRI扫描结合DWI和动态增强扫描对乳腺良恶性病变的鉴别诊断有重要临床价值.

Preliminary Study of the Feasibility on Breast Examination Using Super High-magnetic Field-strength 3.0T MR Scan

Objective:To study the clinical application of breast examination using body-coil on 3.0T MR scan.Methods:36 cases with breast lesion,including augmentation mammaplasty(n=26),breast cancer(n=6) and benign breast lesion(n=4) were studied with 3.0T MR scan.All of these patients had routine T1WI,T2WI as well as fat-suppressed T2WI sequences,contrast enhanced MRI were performed in 17 patients and diffuse weighted imaging(DWI) in 13 patients.Their MRI features were retrospectively analyzed and correlated with pathology findings.Results:The structure of breast were shown clearly without distortion in all of these patients.Polyacrylamide jel materials were-injected into the breast in 26 cases for mammoplasty showed hypo-intensity on T1WI and hyper-intensity on T2WI,which was clearly displayed on fat-suppressed T2WI.Injected squalene materials for mammoplasty showed small particles with fat-like intensities on both T1WI and T2WI.6 cases with breast cancer showed marked hyper-intensity on DWI,the signal intensities increased markedly in early phase after dynamic contrast enhancement,and gradually decreased in the mid and late phases.Axillary lymph lnode metastasis were revealed in 4 patients.However,in 4 cases having benign breast lesions,gradually increased intensities were assessed after dynamic contrast enhancement.Conclusion:Augmentation mammaplasty materials and their distribution might be displayed by using super high-magnetic-field-strength 3.0T MR scan in combination with body-coil.Routine MRI sequences combined with DWI and dynamic contrast enhancement provided helpful information in the differential diagnosis of benign and malignant breast lesions.