摘要
目的:探讨乳腺磁共振扩散加权成像(DWI)检查的可行性,并重点探讨影响DWI图像质量的技术参数。方法:使用GE1.5T磁共振扫描仪及阵列线圈对32例乳腺疾病患者行常规SE序列扫描,其中19例为良性肿瘤,5例炎性病变,6例恶性肿瘤,均经手术及病理证实;另硅胶置入2例。使用体线圈行DWI序列扫描,采用全方位扩散梯度及5个b值扫描。DWI总的扫描时间40s。结果:在DWI序列扫描中,良性和恶性肿瘤均为高信号,计算ADC值可鉴别良性和恶性肿瘤,通过各种扫描参数的合理匹配,可使图像质量的信噪比达到最佳,并减少图像的几何变形。结论:DWI对于检查乳腺病变是一种快速可行并行之有效的技术。
Objective：To investigtc the potential of DWI in breast and focus on lhe technique parameters affecting the quality of DW imaging. Methods：Conventional MR imaging （spin echo T1 WI.T2 WI and STIR） was used to scan 32 patients with histologically proven benign tumors （19） inflammatory lesions （5） and malignant breast lesions （6） on a GE 1. 5T scanner using Breastpa phased array coil. Five B values （32 cases） were acquired with diffusion gradients applied in all three orthogonal directions using body coil. Images were acquired independently in each of the gradient directions （X,Y and Z）. Total diffusion scan time was 40 seconds. Results： All benign and malignant tumors were visible in DWI and showed significant hyperintensity signal. Calculated ADC （in units of ） of malignant lesions was statistically different from that of benign lesions. When various of scan parameters were mixed rationally,MRI may improve signal/noise rate of image quality and lessened geometric malformation. Conclusion： Diffusion weighted imaging is a rapid and feasible method in detecting breast lesions and shows a polential for distinguishing belween benign and malignant lesions.
出处
《放射学实践》
2005年第8期667-669,共3页
Radiologic Practice
关键词
乳腺疾病
磁共振成像
扩散加权成像
DWI
Breast diseases
Magnetic resonance imaging
Diffusion weighted imaging
