3.0T MRI乳腺SE-EPI-DWI与STIR-DWI序列图像质量对比研究  

Comparison study of the imaging quality of SE-EPI-DWI and STIR-DWI in breast lesions

作　　者：林婷婷[1] 董江宁[1] 邓克学[2] 韦炜[2] 方昕[1] 韦超[1] 韦树华[1] 张萍[1] 

机构地区：[1]安徽省肿瘤医院(安徽医科大学附属省立医院西区)影像科,合肥230001 [2]安徽医科大学附属省立医院CT室,合肥230001

出　　处：《安徽医科大学学报》2017年第8期1188-1191,共4页Acta Universitatis Medicinalis Anhui

基　　金：安徽省科技厅公益性技术应用研究联动计划项目(编号:1501ld04028);国家自然基金青年科学基金项目(编号:81501468)

摘　　要：目的比较3.0T MRI自旋回波-平面回波成像的扩散加权成像(SE-EPI-DWI)与短时反转恢复序列的扩散加权成像(STIR-DWI)在乳腺病变检查中的图像质量及表观扩散系数(ADC)值差异。方法回顾性分析行乳腺MRI检查,包括SE-EPI-DWI与STIR-DWI两种序列,并于DWI图像可发现病变的40例乳腺疾病病例的影像学资料,评价两种序列图像的主观评分、信噪比(SNR)、对比噪声比(CNR)及病变ADC值差异。结果 40例病例中STIR-DWI序列图像主观评分高于SE-EPI-DWI(P<0.001):STIR-DWI序列中0、1、2、3级图像比例分别为0、7.5%、27.5%及65.0%,图像均满足诊断要求;SE-EPI-DWI序列中0、1、2、3级图像比例分别为12.5%、25.0%、30.0%及32.5%,其中5例图像质量不符合诊断要求。剔除5例不合格图像,比较35例两种序列均合格图像的SNR及CNR,STIR-DWI序列图像的SNR、CNR均低于SE-EPI-DWI序列(P<0.001)。两种序列对于乳腺病变的ADC值差异无统计学意义。结论乳腺SEEPI-DWI的SNR、CNR明显高于STIR-DWI序列,但后者图像伪影少,图像质量合格率高。乳腺MRI检查应优选SEEPI-DWI序列,但当生理运动等伪影大时,STIR-DWI可作为重要补充,二者结合有助于提高乳腺DWI图像成功率。Objective To compare the image quality and ADC values of SE-EPI-DWI and STIR-DWI in breast lesions. Methods Magnetic resonance imaging( MRI) images of 40 patients( both SE-EPI-DWI and STIR-DWI performed) were retrospectively analysed. Parameters compared between SE-EPI-DWI and STIR-DWI were image artefacts,image signal-to-noise( SNR),contrast-to-noise( CNR),and apparent diffusion coefficient( ADC). Results The rates of image artefacts was significantly higher for SE-EPI-DWI( P < 0. 001) : quality levels 0,1,2,and 3( best) accounted for 0,7. 5%,27. 5% and 65. 0% of STIR-DWI iamges,and 12. 5%,25. 0%,30. 0% and32. 5% of SE-EPI-DWI iamges,respectively. Excepted for 5 cases of unqualified images,the SNR and CNR were significantly lower of STIR-DWI images( P < 0. 001). The ADC values of breast leisons were not significantly different. Conclusion The SNR and CNR of SE-EPI-DWI is higher than STIR-DWI,while the image artefacts of STIRDWI is less than SE-EPI-DWI. STIR-DWI is an important supplementary sequence for clinical use in breast MRI investigations. Combine the two sequences can improve the success rate for breast DWI.

关 键 词：磁共振成像 扩散加权成像 乳腺病变 图像质量 

分 类 号：R812[医药卫生—放射医学] R737.9[医药卫生—临床医学]