小视野DWI与全视野DWI在直肠癌评估中的比较  

Comparison of reduced field-of-view DWI and full field-of-view DWI techniques in assessment of rectal carcinoma

作　　者：温群[1] 杨辰瑶[1] 李晨[1] 朱丽娜 袁明晖 陶玉鹏 叶恺[1] 刘孟潇 袁杰[1] 龚志刚[1] WEN Qun;YANG Chenyao;LI Chen;ZHU Lina;YUAN Minghui;TAO Yupeng;YE Kai;LIU Mengxiao;YUAN Jie;GONG Zhigang(Department of Radiology,Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine,Shanghai 200021,China;Siemens Healthineers,Shanghai 201203,China)

机构地区：[1]上海中医药大学附属曙光医院放射科,上海200021 [2]西门子医疗系统有限公司,上海201203

出　　处：《中国中西医结合影像学杂志》2024年第4期454-457,共4页Chinese Imaging Journal of Integrated Traditional and Western Medicine

基　　金：国家自然科学基金青年基金项目(81703885)。

摘　　要：目的:比较小视野DWI和全视野DWI对直肠癌的应用价值。方法:选择52例直肠癌患者行MRI小视野DWI和全视野DWI序列检查。52例中,T_(2)期9例,T_(3)期35例,T_(4)期8例。由2位主治医师对图像质量进行评分,包括锐利度、图像扭曲变形、伪影、病变清晰度。2种序列图像的SNR、CNR和ADC值比较行配对t检验。采用单因素方差分析比较不同直肠癌T分期的ADC值。结果:小视野DWI的图像主观质量评分、SNR、CNR均高于全视野DWI(均P<0.05)。2种序列所测直肠癌病灶的平均ADC值差异无统计学意义(P>0.05)。除T_(1)期外,不同分期中2种序列所测ADC值差异均有统计学意义(均P<0.05)。2种序列所测ADC值与直肠癌T分期均呈负相关(r=-0.678,-0.631)。结论:与全视野DWI相比,小视野DWI图像质量高,且可对直肠癌进行分期。Objective:To compare the value of reduced field-of-view DWI(r-FOV DWI)and full field-of-view DWI(f-FOV DWI)in patients with rectal cancer.Methods:52 patients with rectal cancer underwent MRI scan,including both r-FOV and f-FOV DWI.Among the 52 patients,9 cases were T_(2) stage,35 cases were T_(3) stage and 8 cases were T_(4) stage.Two radiologists evaluated image quality parameters,including image sharpness,distortion,artifacts,lesion conspicuity.The SNR,CNR and ADC values were quantitatively evaluated using the paired t-test.One-way ANOVA was used to compare the ADC values between the two sequences images in different T stages of rectal cancer.Results:The subjective image quality score,SNR,CNR of r-FOV DWI sequence were statistical higher than those of f-FOV DWI(all P<0.05).There was no significant difference between mean ADC value of rectal cancer between the two sequences(P>0.05).Apart from T_(1) stage,ADC values of rectal cancer in different T stages were significant differences between the two sequences(all P<0.05).ADC values of the two sequences were negatively related with T staging(r=-0.678,-0.631).Conclusions:Compared with f-FOV DWI,r-FOV DWI improves image quality,and can be used in evaluation of histological T staging of rectal cancer.

关 键 词：磁共振成像 弥散加权成像 直肠肿瘤 

分 类 号：R735.37[医药卫生—肿瘤] R445.2[医药卫生—临床医学]