摘要
目的:探讨刀锋技术快速梯度自旋回波扩散加权成像(TGSE-BLADE-DWI)较分段读出平面回波扩散加权成像(RESOLVE)在鞍区成像的图像质量。方法:前瞻性纳入2019年9月15日至2020年2月15日华中科技大学同济医学院附属协和医院因临床怀疑鞍区病变行鞍区MR检查的患者38例,均行鞍区常规MR检查和冠状面TGSE-BLADE-DWI和RESOLVE扫描,32例患者存在鞍区病变。将DWI图像依据扫描方法分为2组进行图像质量的主观和客观评价。主观评价由2名放射学医师按照5级评分完成,评价内容包括正常组织结构(颈内动脉、视交叉、垂体柄、垂体)、病变清晰度、磁敏感伪影、图像失真变形程度以及整体图像质量等。客观评价指标包括基于2组DWI图像测量的病变大小、表观扩散系数(ADC)及信噪比(SNR)。2名医师主观评分的一致性采用Kappa检验,然后采用配对样本 t检验、Wilcoxon符号秩和检验进行组间分析。 结果:2组DWI图像间鞍区正常组织结构的显示(颈内动脉、视交叉、垂体柄、垂体)、磁敏感伪影、图像的失真变形程度、病变的清晰度以及整体图像质量的差异均具有统计学意义( P均<0.05),TGSE-BLADE-DWI组图像的主观评分显著高于RESOLVE组。2组DWI图像间SNR、病变最大纵径和ADC差异均无统计学意义( P均 >0.05)。TGSE-BLADE-DWI组测得的病变最大横径显著小于RESOLVE组,且差异有统计学意义( Z=3.31, P=0.001)。 结论:与RESOLVE相比,TGSE-BLADE-DWI可以有效降低鞍区磁敏感伪影和图像的失真变形程度,更准确地显示鞍区正常解剖结构和病变组织,明显改善鞍区DWI图像的质量。
Objective To compare the image quality of turbo gradient and spin echo-BLADE diffusion weighted imaging(TGSE-BLADE-DWI)with that of readout segmentation of long variable echo-trains(RESOLVE)at the sellar region.Methods From September 15th,2019 to February 15th,2020,38 patients with suspected sellar abnormalities were enrolled prospectively to perform RESOLVE and TGSE-BLADE-DWI at a 3.0 T MR scanner in Department of Radiology,Union Hospital,Tongji Medical College of Huazhong University of Science and Technology.Totally,32 patients were identified with sellar lesions.The DWI images were evaluated subjectively and objectively.Two experienced radiologists scored images of the two DWI methods for anatomical structures(including the internal carotid arteries,optic chiasm,pituitary stalk and pituitary gland),lesion conspicuity,susceptibility artifacts,geometric distortions and overall image quality using a five-point scale respectively.Objective parameters on the images of the two DWI methods were analyzed,including lesion size,signal to noise ratio(SNR)and apparent diffusion coefficient(ADC).The consistency of subjective scores of two radiologists was tested by Kappa test.Paired t-test,Wilcoxon signed rank test,Kappa statistics were used for statistical evaluation.Results TGSE-BLADE-DWI performed significantly better than RESOLVE in depicting the sellar anatomical structures,lesion conspicuity,geometric distortion and overall image quality(all P<0.05).There were no significant differences in SNR,maximum longitudinal diameter of lesions and ADC of lesions between the two DWI methods(all P>0.05).The maximum transverse diameter measured by TGSE-BLADE-DWI was significantly smaller than that of RESOLVE(Z=3.31,P=0.001).Conclusions Compared with RESOLVE,TGSE-BLADE-DWI is superior in depicting the anatomical structures,decreasing susceptibility artifacts and geometric distortions at the sellar region and effectively improves the image quality of DWI,which has great value in clinical applications.
作者
富青
孔祥闯
刘定西
周堃
郑传胜
雷子乔
Fu Qing;Kong Xiangchuang;Liu Dingxi;Zhou Kun;Zheng Chuansheng;Lei Ziqiao(Department of Radiology,Union Hospital,Tongji Medical College of Huazhong University of Science and Technology,Hubei Province Key Laboratory of Molecular Imaging,Wuhan 430022,China;Siemens Shenzhen Magnetic Resonance Ltd.,Shenzhen 518000,China)
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2022年第1期81-86,共6页
Chinese Journal of Radiology
关键词
磁共振成像
扩散加权成像
鞍区
图像质量
Magnetic resonance imaging
Diffusion weighted imaging
Sellar region
Image quality
