增强后单次屏气3D SPACE序列MR胰胆管成像技术的应用研究  

The application of enhanced single breath-hold 3D SPACE sequence in MR cholangiopancreatography

作　　者：彭勇[1] 龙斌[1] 张霖 尹龙[1] 田迪 邓鹏 彭红芬[1] 张蔚[1] 张东友[1] PENG Yong;LONG Bin;ZHANG Lin;YIN Long;TIAN Di;DENG Peng;PENG Hongfen;ZHANG Wei;ZHANG Dongyou(Department of Radiology,Wuhan No.1 Hospital,Wuhan 430022,China)

机构地区：[1]武汉市第一医院放射科,湖北武汉430022

出　　处：《实用放射学杂志》2024年第11期1901-1904,共4页Journal of Practical Radiology

摘　　要：目的探讨增强后高并行采集因子三维可变反转角快速自旋回波单次屏气磁共振胰胆管成像(3D SPACE BH MRCP)对图像质量的影响。方法前瞻性收集33例临床怀疑胰胆管病变行上腹增强和磁共振胰胆管成像(MRCP)的影像资料,所有患者均需在增强前、后采集单次3D SPACE BH MRCP。记录增强前、后3D SPACE BH MRCP胆总管、背景信号强度,图像的信噪比(SNR)、对比噪声比(CNR)以及主观评分。采用Wilcoxon符号秩和检验进行统计学分析,并用Kappa检验评估2名阅片者评分一致性。结果增强前、后3D SPACE BH MRCP胆总管信号差异无统计学意义(Z=-1.215,P=0.224),增强后背景信号减低,差异有统计学意义(Z=-3.878,P<0.001);图像SNR、CNR均优于增强前3D SPACE BH MRCP(Z=-4.458,P<0.001;Z=-4.583,P<0.001)。主观评分增强后3D SPACE BH MRCP优于增强前,差异有统计学意义(Z=-2.646,P=0.008)。增强前、后3D SPACE BH MRCP评分阅片者间一致性较强(Kappa=0.70,P<0.01;Kappa=0.73,P<0.01)。结论增强后门静脉期与平衡期之间扫描3D SPACE BH MRCP不影响胰胆管显示,且能有效抑制背景信号,提高MRCP的图像质量。Objective To investigate the effect of enhanced three-dimensional variable reversal angle fast spin-echo single breathhold magnetic resonance cholangiopancreatography(3D SPACE BH MRCP)with high parallel acquisition factor on image quality.Methods A total of 33 patients with clinically suspected pancreatobiliary duct disease who underwent epigastric enhancement and magnetic resonance cholangiopancreatography(MRCP)examination were prospectively collected.All patients were required to acquire a single 3D SPACE BH MRCP before and after enhancement.The signal intensity of the common bile duct and background,signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR),and subjective scores of 3D SPACE BH MRCP before and after enhancement were recorded.Statistical analyses were performed using the Wilcoxon signed-rank sum test,and the Kappa test was used to assess the consistency of scores between the two readers.Results The difference in the common bile duct signals of 3D SPACE BH MRCP before and after enhancement was not statistically significant(Z=-1.215,P=0.224),however the background signal was decreased after enhancement with a significant difference(Z=-3.878,P<0.001).The SNR and CNR of the images were better than those of 3D SPACE BH MRCP before enhancement(Z=-4.458,P<0.001;Z=-4.583,P<0.001).The subjective score of 3D SPACE BH MRCP after enhancement was better than that before enhancement,and the difference was statistically significant(Z=-2.646,P=0.008).There was a strong inter-reader agreement before and after enhancement 3D SPACE BH MRCP scores(Kappa=0.70,P<0.01 and Kappa=0.73,P<0.01).Conclusion The enhanced 3D SPACE BH MRCP between portal vein phase and equilibrium phase dose not affect the display of pancreaticobiliary duct,and can effectively suppress the background signal and improve the image quality of MRCP.

关 键 词：磁共振胰胆管成像 三维可变反转角快速自旋回波 图像质量 

分 类 号：R445.2[医药卫生—影像医学与核医学] TP753[医药卫生—诊断学]