口腔常用铸造金属桩核对磁共振成像的影响  

The effects of commonly used dental cast metal posts and cores on MRI

作　　者：马庆云[1] 任甫[2] 李新[1] 殷方[1] 宋烨[1] 王璐[1] 

机构地区：[1]辽宁医学院附属第二医院,锦州121000 [2]辽宁医学院

出　　处：《实用口腔医学杂志》2014年第4期460-463,共4页Journal of Practical Stomatology

基　　金：辽宁省科学技术基金自然科学基金(编号:2013022029);辽宁省科学事业公益研究基金(编号:2011-49);辽宁省高等学校科学研究立项计划(编号:L2010299)

摘　　要：目的:探讨口腔常用铸造金属桩核对头颈部磁共振成像的影响。方法:将6种金属合金(镍铬、钴铬、含钛、纯钛、钯金、金铂)制作的桩核固定于志愿者左侧上颌,进行磁共振扫描,扫描序列为SE-T1WI和TSE-T2WI。结果:方差分析显示:金属材料(F=153.63,P<0.05)、扫描序列(F=70.94,P<0.05)、桩核数量(F=102.73,P<0.05)均对伪影面积有显著性影响。在2个序列扫描中,伪影面积:钯金桩核>钴铬桩核>镍铬桩核>金铂桩核>含钛桩核>纯钛桩核;2个桩核>1个桩核;SE-T1WI>TSE-T2WI。结论:不同金属桩核对磁共振成像伪影的影响不同,合理选择金属材料及成像序列可减小伪影。Objective：To observe the influence of commonly used dental cast metal posts and cores on magnetic resonance imaging （MRI）for head and neck.Methods：Six kinds of posts and cores made of metal alloy （Ni-Cr alloy,Co-Cr alloy,titanium alloy,pure titanium,Pd-Au alloy and Au-Pt alloy）were respectively fixed on the mucosa of left palate of a volunteer.The maxillofacial region of the subjects was scanned by routine head sequences SE-T1WI and TSE-T2WI respectively.Results：ANOVA of factorial design analy-sis indicated significant differences of artifacts among metal materials（F=153.63,P〈0.05）,scanning sequences（F=70.94,P〈0.05）and the number of cast posts and cores（F=102.73,P〈0.05）.In both sequences the size of metal artifacts were as following：Pd -Au alloy〉Co-Cr alloy〉Ni-Cr alloy〉Au-Pt alloy〉titanium alloy〉pure titanium;two posts and cores〉one post and core;SE-T1WI〉TSE-T2WI.Conclusion：Different cast metal posts and cores have different influences on MRI artifact.Reasonably choosing the metal materials and scanning sequences can minimize artifacts on MRI.

关 键 词：磁共振成像(MRI) 金属桩核 伪影 

分 类 号：R445.2[医药卫生—影像医学与核医学]