口腔金属桩核材料对磁共振成像的影响  

Effect of oral alloy post and core on magnetic resonance imaging

作　　者：殷方[1] 李新[1] 马庆云[1] 王璐[1] 宋烨[1] 

机构地区：[1]辽宁医学院附属第二医院修复科,锦州121000

出　　处：《华西口腔医学杂志》2014年第6期588-591,共4页West China Journal of Stomatology

基　　金：辽宁省科学事业公益研究基金资助项目(2011-49);辽宁省高等学校科学研究立项计划基金资助项目(L2010299)

摘　　要：目的比较各种铸造金属桩核对磁共振成像的影响。方法制作6种铸造金属桩核,并以一体化氧化锆桩核作为对照组,7种桩核形状大小相同,固定于志愿者口腔内,进行磁共振扫描,采用自旋回波第一加权像(SET1WI)、快速自旋回波第二加权像(TSE-T2WI)、普通EPI扩散加权像(DWI)进行扫描。结果钴铬合金桩核的成像伪影最大。金钯合金桩核无明显伪影,与一体化氧化锆桩核成像差异无统计学意义(P>0.05)。纯钛桩核产生轻度伪影。钛合金、镍镉合金、金铂合金桩核产生中度伪影,三者间差异无统计学意义(P>0.05)。结论不同金属桩核对磁共振成像的影响不同,除钴铬合金桩核外,单个金属桩核所产生伪影均不影响头颈部正常组织影像。Objective This study aims to observe and compare the influences of the casting alloy post and cores on magnetic resonance imaging（MRI）.Methods Six casting alloy post and cores were fabricated for the experimental groups,and zirconia post and core served as the control.The seven types of post and cores were of the same size and shape.Each post and core was orally fastened to a volunteer and then imaged with sequences of T1-weighted spin echo imaging（SE-T1WI）,T2-weighted turbo spin-echo imaging（TSE-T2WI）,and diffusion weighted imaging（DWI）.Results Cobalt chromium alloy post and core generated severe artifacts,whereas gold palladium alloy post and core generated no obvious artifacts,and no difference was observed between the zirconia and the gold palladium alloy post and cores（P〉0.05）.The pure titanium alloy post and core produced mild artifacts.The post and cores of the titanium,nickel-cadmium,and gold platinum alloys generated moderate artifacts with no significant differences（P〉0.05）.Conclusion Different metal post and cores have different influences on MRI.With the exception of that generated by cobalt chromium alloy,the artifact generated by the single-alloy post and core does not influence the image of the normal head and neck.

关 键 词：磁共振成像 金属桩核 伪影 

分 类 号：R445.2[医药卫生—影像医学与核医学]