4种金属冠对磁共振成像影响的对比研究

发布时间：2018-07-05 13:16

本文选题：伪影 + 金属伪影　；参考：《实用口腔医学杂志》2014年04期

【摘要】：目的:观察4种金属铸造冠磁共振成像(MRI)检查时所产生金属伪影。方法:给实验犬依次佩戴钴铬合金、低钛合金、镍铬合金、纯钛4种试验铸造冠(右上第二前磨牙),分别进行常规3.0 T 6个序列及1.5 T 4个序列磁共振头部扫描,测量4种铸造冠所产生的伪影的最大面积和伪影涉及图像的层数。结果:2种场强下钴铬合金铸造冠所产生的伪影面积最大(P0.01);1.5 T场强下其他3种合金冠之间差异均无显著性(P0.05);3.0 T场强下镍铬合金冠伪影大于低钛合金冠和纯钛冠(P0.05);低钛合金冠与纯钛冠差异无显著性(P0.05)。在2种场强下和全部扫描序列中,伪影涉及的图像层数均以钴铬合金冠的最多,纯钛金属冠最少,其余2种合金冠相同。结论:钴铬合金伪影程度最大,镍铬合金和低钛合金次之,纯钛在4种金属中伪影程度最小。
[Abstract]:Objective: to observe the metal artifacts produced by magnetic resonance imaging (MRI) of four metal cast crowns. Methods: four experimental crowns (right upper and second premolar) were used to wear cobalt chromium alloy, low titanium alloy, nickel chromium alloy and pure titanium respectively. Six sequences of 3.0T and four sequences of 1.5T were performed respectively. The maximum area of artifacts produced by four kinds of casting crowns and the number of layers of artifacts involved in the images were measured. Results there was no significant difference in artifact area (P0.01) between the other three alloy crowns under the two kinds of field strength (P0.01). (P0.05) the artifacts of Ni-Cr alloy crowns under 3.0 T field strength were larger than those of low titanium alloy crowns and pure titanium crowns (P0.05). There was no significant difference between titanium alloy crown and pure titanium crown (P0.05). In the two kinds of field intensities and all scanning sequences, the number of image layers involved in artifact is the highest in cobalt-chromium alloy crowns, the least in pure titanium crowns, and the same in the other two kinds of alloy crowns. Conclusion: Co-Cr alloy has the highest artifact degree, Ni-Cr alloy and low titanium alloy take second place, and pure titanium is the least artifact among the four metals.
【作者单位】：河北医科大学第二医院口腔修复科;
【基金】：河北省卫生厅科研攻关计划(编号:08115)
【分类号】：R783.1

【参考文献】