复合灵敏度编码高分辨率扩散加权成像在颈部MRI扫描的应用价值  

Application value of multiplexed sensitivity encoding diffusion weighted imaging in neck MRI scanning

作　　者：谢晓亮 张勇 孙其安 王苇[1] 赵义[1] 王建伟[2] XIE Xiaoliang;ZHANG Yong;SUN Qi'an;WANG Wei;ZHAO Yi;WANG Jianwei(Department of Imaging,the Affiliated Hospital of Yangzhou University,Yangzhou,Jiangsu Province 225100,China;Department of Radiology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,China)

机构地区：[1]扬州大学附属医院影像科,江苏扬州225100 [2]南京医科大学第一附属医院放射科,江苏南京210029

出　　处：《实用放射学杂志》2024年第3期468-472,共5页Journal of Practical Radiology

基　　金：扬州市"十三五"科教强卫工程重点学科资助项目(ZDXK20186)。

摘　　要：目的探讨复合灵敏度编码高分辨率扩散加权成像(MUSE-DWI)序列在颈部MRI中的可行性,并与传统单次激发平面回波扩散加权成像(SS-EPI-DWI)序列进行对照.方法30例志愿者进行颈部MUSE-DWI和SS-EPI-DWI序列扫描.由2位放射科医师各自独立对2组图像的磁敏感伪影、化学位移伪影、几何形变和整体图像质量进行定性评分,并在鼻咽窝层面、腮腺层面、声门层面和甲状腺层面测量和比较2组图像感兴趣区(ROI)的噪声、信噪比(SNR)和对比噪声比(CNR).结果定性分析显示MUSE-DWI序列在磁敏感伪影、化学位移伪影、几何形变和整体图像质量方面的图像质量评分均优于SS-EPI-DWI序列(P<0.001).定量分析显示MUSE-DWI序列图像各ROI的噪声值小于SS-EPI-DWI序列(P<0.001);MUSE-DWI序列图像各ROI的SNR和CNR均大于SS-EPI-DWI序列(P<0.001).结论与SS-EPI-DWI序列相比,MUSE-DWI序列能明显减少颈部DWI的图像几何形变、磁敏感伪影和化学位移伪影,图像SNR和CNR更高,因此更适合应用于颈部MRI扫描.Objective To explore the feasibility of the multiplexed sensitivity encoding diffusion weighted imaging(MUSE-DWI)sequence in neck MRI,and to compare with traditional single-shot echo-planar imaging diffusion weighted imaging(SS-EPI-DWI)sequence.Methods Thirty healthy volunteers underwent MUSE-DWI and SS-EPI-DWI sequences scanning in neck.Two groups of images were independently scored by two radiologists for magnetic sensitivity artifact,chemical shift artifact,geometric distortion and overall image quality.The noise,signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of the regions of interest(ROI)of the two groups of images were measured and compared on the nasopharyngeal fossa layer,parotid gland layer,glottic layer and thyroid layer.Results Qualitative analysis showed that the image quality scores of MUSE-DWI sequence were significantly better than those of SS-EPI-DWI sequence in terms of magnetic sensitivity artifact,chemical shift artifact,geometric distortion and overall image quality(P<0.001).Quantitative analysis showed that the noise values of ROIs of MUSE-DWI sequence were significantly lower than those of SS-EPI-DWI sequence(P<0.001).The SNR and CNR of ROIs of MUSE-DWI sequence were higher than those of SS-EPI-DWI sequence(P<0.001).Conclusion MUSE-DWI sequence can significantly reduce geometric distortion,magnetic sensitivity artifact and chemical shift artifact,and SNR and CNR of images are significantly increased compared with SS-EPI-DWI sequence,which is more suitable for neck MRI scanning.

关 键 词：颈部 扩散加权成像 复合灵敏度编码 平面回波成像 质量控制 

分 类 号：R816.1[医药卫生—放射医学] R445.2[医药卫生—临床医学]