口腔固定修复金属材料对MRI影像的影响  

Effects of the fixed metallic dental materials on MRI images

作　　者：刘广顺[1] 任庆云[1] 王瑶[1] 刘倩峰[1] 张晋弘[1] 李庆星[1] 

机构地区：[1]河北医科大学第一医院,石家庄050031

出　　处：《实用口腔医学杂志》2010年第2期265-267,共3页Journal of Practical Stomatology

基　　金：2007河北省科学技术研究与发展指导计划项目(编号:072761207)

摘　　要：检测口腔内4种常用固定修复金属材料在磁共振检查时是否产生伪影及伪影的大小,比较不同检查序列对伪影的影响。发现金铂钯合金全冠有轻度伪影;金银钯合金、纯钛全冠有中度伪影;镍铬合金全冠有重度伪影。得出不同金属材料在MRI同一序列成像时对磁共振成像的影响不同;相同金属材料在不同序列成像中的金属伪影大小无明显差别。口腔金属材料产生的伪影与材料类型密切相关,通过合理选择金属材料可得到最佳MRI成像。In this paper,to evaluate the existence and extent of MRI artifacts caused by frequently used metallic dental materials and to compare the influence of different MRI sequences on artifacts. The artifact of Au-Pt-Pd alloy crown were the smallest and Au-Ag-Pd alloy crown, pure Titanium crown were smaller. But the artifact of Ni-Gr alloy crown were the largest. With the same scan sequences, the different metal materials can make different effects on MRI images with the different scan sequences, the MRI artifact is not obvious caused by the same metal materials. Artifacts produced by oral metallic materials related closely to the type of the materials. The high quality MRI can be gained by choosing proper metallic materials.

关 键 词：口腔材料 金属 磁共振 伪影 

分 类 号：R445.2[医药卫生—影像医学与核医学] R783.1[医药卫生—诊断学]