三维屏气梯度-自旋回波序列在MR胰胆管成像中的应用  

The application of three-dimensional breath-hold gradient and spin-echo sequence in the MR cholangiopancreatography

作　　者：许逸超 徐正道[1] 张家会 孙张明 陈建新[1] 胡翼江[1] 季妍廷 Xu Yichao;Xu Zhengdao;Zhang Jiahui;Sun Zhangming;Chen Jianxin;Hu Yijiang;Ji Yanting(Department of Radiology,the Affiliated Zhangjiagang Hospital of Soochow University,Suzhou 215600,China)

机构地区：[1]苏州大学附属张家港医院影像科,215600

出　　处：《中华放射学杂志》2021年第1期64-69,共6页Chinese Journal of Radiology

摘　　要：目的探讨三维屏气梯度-自旋回波(3D BH-GRASE)序列在MR胰胆管成像(MRCP)中的应用价值。方法前瞻性收集2017年11月至2018年12月苏州大学附属张家港医院59名临床疑有胰胆管疾病患者,采用3D BH-GRASE和三维呼吸触发快速自旋回波(3D RT-TSE)两个序列进行MRCP成像。所得图像由3名医师对图像整体质量及胰胆管不同解剖部位显示情况进行主观评分,记录扫描时间,并计算图像信噪比(SNR)、对比率(CR)及对比噪声比(CNR)。采用配对t检验比较两个序列的扫描时间,采用Wilcoxon符号秩检验比较主观评分和SNR、CR和CNR。结果3D BH-GRASE序列扫描时间为16.4 s,3D RT-TSE为(258.6±42.2)s,差异有统计学意义(t=44.073,P<0.001),扫描时间缩短94%。图像整体质量评分3D BH-GRASE优于3D RT-TSE(Z=-6.595,P<0.001);两个序列显示胆总管上、中、下段和左、右肝管的1、2级分支评分差异无统计学意义(P>0.05);3D BH-GRASE序列图像显示胆囊底、体、颈、管各部评分均高于3D RT-TSE(P<0.001);而3D RT-TSE显示主胰管近、中、远段各部评分均高于3D BH-GRASE序列(P<0.05)。两个序列图像SNR差别无统计学意义(Z=0.403,P=0.687),3D RT-TSE序列的CR和CNR均优于3D BH-GRASE序列(Z=6.215,P<0.001;Z=3.046,P=0.002)。结论在MRCP检查中合理应用3D BH-GRASE序列,在保证图像质量的前提下,可缩短扫描时间,提高检查效率。Objective To evaluate the clinical feasibility and image quality of three-dimensional breath-hold gradient and spin-echo(3D BH-GRASE)sequence in magnetic resonance cholangiopancreatography(MRCP).Methods In this prospective study,59 patients with clinically suspected pancreaticobiliary duct disease performed MRCP with both 3D BH-GRASE and 3D respiration-triggered turbo spin-echo(3D RT-TSE)sequences on 3.0 T scanner in the Affiliated Zhangjiagang Hospital of Soochow University from November 2017 to December 2018.The overall image quality was scored independently by 3 experienced radiologists based on the visibility of different anatomical features of the pancreaticobiliary duct.For comparing the 2 sequences,the statistical difference in scan time was assessed with a paired t test;while subjective scores,signal-to-noise ratios(SNR),contrast ratios(CR)and contrast noise ratios(CNR)were compared with Wilcoxon signed rank test.Results The scan time of 3D BH-GRASE sequence was 16.4 s while that of 3D RT-TSE was(258.6±42.2)s.Their difference was statistically significant(t=44.073,P<0.001),with the scan time for 3D BH-GRASE shortened by 94%.The overall quality scores of 3D BH-GRASE images were better than those of 3D RT-TSE(Z=-6.595,P<0.001).There was no statistical difference(P>0.05)in the scores regarding the visibility of the upper,middle and lower parts of common bile duct and the first and second branches of left and right hepatic ducts.For visualizing the bottom,body,neck and duct of gallbladder,the 3D BH-GRASE sequence received a higher score than the 3D RT-TSE sequence(P<0.001).For displaying the proximal,middle and distal segments of main pancreatic duct,the 3D RT-TSE sequence was scored higher than the 3D BH-GRASE sequence(P<0.05).There was no significant difference of SNR between the two sequences(Z=0.403,P=0.687),whereas CR and CNR of 3D RT-TSE MRCP were better than those of 3D BH-GRASE MRCP(Z=6.215,P<0.001 and Z=3.046,P=0.002,respectively).Conclusion Under the prerequisite of ensuring image quality,a proper

关 键 词：胰胆管造影术 磁共振 对比研究 图像质量 

分 类 号：R445.2[医药卫生—影像医学与核医学] R575[医药卫生—诊断学] R576[医药卫生—临床医学]