两种三维MR胰胆管成像技术的应用价值比较  

Application of Two Technologies of Three-Dimensional Magnetic Resonance Cholangiopancreatography: A Comparative Study

作　　者：谭云[1] 何兰[1] 罗维[1] 郑君惠[1] TAN Yun;HE Lan;LUO Wei;ZHENG Junhui(Department of Radiology,Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences),Guangzhou 510080,China)

机构地区：[1]广东省人民医院(广东省医学科学院)放射科,广东广州510080

出　　处：《中国医学影像学杂志》2022年第12期1296-1300,共5页Chinese Journal of Medical Imaging

摘　　要：目的 比较三维屏气梯度-自旋回波(3D BH-GraSE)MR胰胆管成像(MRCP)与三维呼吸触发压缩感知(3D RT-CS MRCP的图像质量及临床应用价值。资料与方法 回顾性分析2021年2月—2021年5月在广东省人民医院接受MR胰胆管检查的44例患者,采用3D BH-GraSE和3D RT-CS序列成像。根据所得图像质量及胰胆管显示情况进行评分,记录扫描时间,计算图像对比噪声比(CNR)和信噪比(SNR)。比较2个序列的扫描时间、图像质量评分、CNR和SNR。结果 3D BH-GraSE序列扫描时间为15 s,3D RT-CS序列扫描时间为(75.5±8.7)s,差异有统计学意义(t=32.310,P<0.001),3D BH-GraSE较3D RT-CS序列扫描时间缩短80%。2名医师的评分一致性较强(Kappa=0.801,P<0.001)。主观评分中,3D RT-CS序列图像整体质量、背景抑制、胆囊及胆总管评分高于3D BH-GraSE序列,差异有统计学意义(Z=0.038、0.000、0.025、0.016,P均<0.05)。客观分析中,3D RT-CS序列的CNR优于3D BH-GraSE序列,差异有统计学意义(Z=3.333,P=0.001);两组序列SNR差异无统计学意义(Z=1.573,P=0.116)。结论 在MRCP检查中,优化的3D RT-CS序列结合3D BH-GraSE序列可以提供优良的图像质量,提高检查效率,满足各种临床需求。Purpose To compare the image quality and the value of clinical application of three-dimensional(3D) breath-hold(BH magnetic resonance cholangiopancreatography(MRCP) based on gradient spin-echo(GRASE) and 3D respiratory gated triggered(RT) MRCP based on compressive sensing(CS) technique. Materials and Methods In this retrospective study, a total of 44 patients who underwent both 3D BH-GRASE MRCP and 3D RT-CS MRCP were retrieved in Guangdong Provincial People’s Hospital from February 2021 to May 2021. Then, we scored the acquired images according to image quality and display of pancreaticbiliary duct. The scanning times were recorded,and the image contrast noise ratio(CNR) and signal-to-noise ratio(SNR) were calculated. Finally, the scanning times were compared between 3D BH-GRASE MRCP and 3D RT-CS MRCP using T test, and the values of image quality score, CNR, and SNR were compared between two sequence using Mann Whitney U test. Results The scanning time of 3D BH-GRASE MRCP was 15 s, and that of 3D RT-CS MRCP was(75.5±8.7) s, which the difference was statistically significant(t=32.310, P<0.001). The scanning time of 3D BH-GRASE MRCP was shortened by 80% compared with 3D RT-CS MRCP. The image quality scores between two radiologists were consistent(kappa=0.801,P<0.001). For the qualitative assessment, the score of overall image quality, background suppression, display of gallbladder and common bile duct for 3D RT-CS MRCP were higher than those of 3D BH-GRASE MRCP, which the differences were statistically significant(Z=0.038,0.000, 0.025, 0.016, all P<0.05). For the quantitative assessment, the CNR of 3D RT-CS MRCP was better than that of 3D BH-GRASE MRCP,which the difference was statistically significant(Z= 3.333, P=0.001);there was no significant difference in SNR between the two groups(Z= 1.573, P=0.116). Conclusions In the examination of MRCP, the optimized imaging sequence by combining 3D RT-CS and 3D BHGRASE technique can provide excellent image quality and improve examination efficiency, which meet various n

关 键 词：胰胆管成像 磁共振成像 梯度-自旋回波 压缩感知 图像质量 

分 类 号：R575.7[医药卫生—消化系统] R445.2[医药卫生—内科学]