2种磁共振去伪影技术在不同材料金属烤瓷冠成像中的比较
Comparison of the two magnetic resonance deartifact techniques in imaging of different porcelain-fused-to-metal crowns
作者：李文晋,牛金亮,朱莉,王瑜,安颖,张双元
Author：Wenjin Li,Jinliang Niu,Li Zhu,Yu Wang,Ying An,Shuangyuan Zhang
收稿日期：2018-02-11 年卷（期）页码：2019,37(1):66-66-69
期刊名称：华西口腔医学杂志
Journal Name：West China Journal of Stomatology
关键字：磁共振成像,金属烤瓷冠,螺旋桨成像,金属伪影,
Key words：magnetic resonance imaging,porcelain-fused-to-metal,propeller,metal artifact,
基金项目：山西省教育厅高等学校科技创新项目(20141105);山西医科大学第二医院教学基金(201603-5);山西省留学办山西省回国留学人员科研资助项目(2016-122);山西省留学回国人员科技活动项目择优资助(晋财社<2017>19号)
中文摘要
目的 通过比较金属烤瓷冠在2种磁共振去伪影技术MRI成像中的伪影大小,探讨螺旋桨成像（propeller）-快速自旋回波T2加权（FSE T2WI）序列技术在降低金属伪影中的应用价值。方法 收集存在右下颌第一磨牙金属烤瓷冠且行MRI头颅检查的患者48例,根据金属基底的不同将金属烤瓷冠分为镍铬合金烤瓷冠、钴铬合金烤瓷冠、纯钛烤瓷冠。48例患者均采用MRI扫描仪进行FSE T2WI序列扫描和propeller-FSE T2WI序列扫描,比例2种序列下金属烤瓷冠的MRI伪影面积大小。结果 propeller-FSE T2WI序列下各金属烤瓷冠形成的伪影面积均小于FSE T2WI序列,差异具有统计学意义（P结论 Propeller-FSE T2WI技术能有效降低金属烤瓷冠的金属伪影。
英文摘要
ObjectiveThis study aimed to compare the porcelain-fused-to-metal (PFM) crown artifact in the magnetic resonance imaging (MRI) of the two magnetic resonance deartifact techniques in studying the application value of the propeller-fast spin-echo T2-weighted sequence (FSE T2WI) in troubleshooting PFM crown artifacts.MethodsA total of 48 patients with right mandible first molar crown who underwent MRI head examination were chosen as subjects in the study. According to different metal substrates, PFM crowns were divided to three types, namely, nickel-chromium alloy crown, cobalt-chromium alloy crown and titanium crown. The patients received two MRI scan sequences, that is, FSE T2WI and propeller-FSE T2WI sequences. The MRI artifacts areas in two sequences were measured.ResultsThe difference between FSE T2WI and propeller-FSE T2WI sequences in three kinds of PFM crown was significant (PConclusionPropeller-FSE T2WI sequence technique can effectively reduce the metal artifacts of various PFM crowns.
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