肝脏占位病变患者增强MRI胆道系统图像质量最佳翻转角探讨  

Optimal flip angle for image quality of biliary system under Gd-EOB-DTPA-enhanced MRI in patients with space-occupying lesions

作　　者：景红 历媛 孙小伶 王丹 Jing Hong;Li Yuan;Sun Xiaoling(Department of Radiology,Affiliated Hospital,Xuzhou Medical University,Xuzhou 221009,Jiangsu Province,China)

机构地区：[1]徐州医科大学附属医院医学影像科,江苏省徐州市221009

出　　处：《实用肝脏病杂志》2024年第3期426-429,共4页Journal of Practical Hepatology

基　　金：江苏省自然科学基金资助项目(编号:BK20191153)。

摘　　要：目的探讨肝脏占位病变患者增强磁共振成像(MRI)胆道系统图像质量的最佳翻转角(FA)。方法2019年7月~2023年7月我院收治的肝脏占位病变患者60例,使用飞利浦Ingenia 3.0扫描仪行钊塞酸二钠(Gd-EOB-DTPA)增强扫描,设置翻转角分别为9°、20°、30°、45°和60°。评估不同翻转角状态下胆道系统胆道显影、伪影、信噪比和对比噪声比的差异。结果在FA=45°和60°时,胆道显影评分分别为(3.4±0.9)和(3.6±1.0),均显著高于9°、20°和30°时【分别为(2.7±0.5)、(2.9±0.8)和(3.2±0.8),P<0.05】,随着翻转角的增大,胆道显影评分越来越高,即图像质量越来越好;在胆道系统客观评价方面,各FA时胆囊、肝总管、胆总管信噪比比较差异均具有统计学意义(P<0.05);当FA=30°、45°和60°时,胆囊、左肝管、右肝管、肝总管和胆总管信噪比均显著高于FA=9°时(P<0.05);当FA=45°时,胆囊、右肝管、肝总管平均信噪比最佳,而FA=30°时左肝管和胆总管平均信噪比最佳;各FA时胆囊、肝总管、胆总管对比信噪比比较差异均具有统计学意义(P<0.05);当FA=30°、45°和60°时,胆囊、左肝管、右肝管、肝总管和胆总管对比信噪比均显著高于FA=9°时(P<0.05);当FA=45°时,胆囊、右肝管、肝总管和胆总管平均对比信噪比最佳,而FA=30°时左肝管平均对比信噪比最佳。结论在3T延迟成像方面,GdEOB-DTPA增强扫描肝胆管T1加权成像的最佳FA为45°,这一发现可作为临床胆道MR成像的参数设置依据,以提高胆道系统成像质量。Objective The study was conducted to investigate the optimal flip angle(FA)for image quality of the biliary system under disodium zocerate(Gd-EOB-DTPA)enhanced magnetic resonance imaging(MRI)in patients with space-occupying lesions(SOL).Methods Sixty patients with SOL were admitted to our hospital between July 2019 and July 2023,and all underwent Gd-EOB-DTPA-enhanced MRI by using a Philips Elition 3.0 scanner with five different sets of FA at 9°,20°,30°,45°and 60°.The bile duct,artifacts,signal-to-noise ratio and contrast-to-noise ratio of the biliary system with different FA were compared.Results At FA=45°and 60°,the estimated scores of cholangiography were(3.4±0.9)and(3.6±1.0),both significantly higher than at 9°,20°and 30°[(2.7±0.5),(2.9±0.8)and(3.2±0.8),respectively,P<0.05],suggesting with the increase of FA,the score of biliary duct imaging were getting greater and greater,that is,the image quality was getting better and better;as respect to the objective evaluation of biliary system,the differences of signal-to-noise ratio of gallbladder,common hepatic duct and common bile duct at each FA were statistically significant(P<0.05);at FA=30°,45°and 60°,the signal-to-noise ratios of gallbladder,left hepatic duct,right hepatic duct,common hepatic duct and common bile duct were significantly higher than those at FA=9°(P<0.05);the average signal-to-noise ratio of gallbladder,right hepatic duct and common hepatic duct were the best at FA=45°,while the average signal-to-noise ratio of left hepatic duct and common bile duct was the best at FA=30°;there were statistically significant differences in the signal-to-noise ratio of gallbladder,common hepatic duct and common bile duct at different FA(P<0.05);at FA=30°,45°and 60°,the signal-to-noise ratio of gallbladder,left hepatic duct,right hepatic duct,common hepatic duct and common bile duct were significantly higher than that at FA=9°(P<0.05);in addition,the average contrast signal-to-noise ratio of gallbladder,right hepatic duct,common hepatic d

关 键 词：肝占位性病变 磁共振成像 胆道系统 翻转角 图像质量 

分 类 号：R445.2[医药卫生—影像医学与核医学] R735.7[医药卫生—诊断学]