3.0T磁共振6个序列产生金属伪影程度的对比

目的对比3.0 T磁共振检查常用的6种序列所产生金属伪影的程度。方法制作4种实验铸造冠(钴铬合金、镍铬合金、低钛合金、纯钛),给实验犬依次佩戴4种实验铸造冠,进行3.0 T磁共振自旋回波T_1加权像(T_1W/SE)、反转恢复T_2加权像(T_2W/IR)、T_2*梯度回波(T_2*/GRE)、快速自旋回波T_2加权像(T_2W/FSE)、液体衰减反转恢复T_1加权像(T_1W/FLAIR)、螺旋桨技术T_2加权像(T_2W/PROP)6种序列的头部扫描,测量6种扫描序列扫描4种铸造冠时所产生的伪影最大面积和伪影涉及图像的层数,对测量结果进行对比。结果从扫描所得的图像及测量数据来看,无论扫描哪...

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Bibliographic Details
Published in华西口腔医学杂志 Vol. 34; no. 3; pp. 277 - 280
Main Author 高岚 廉云敏 王璞 怀海丽
Format Journal Article
LanguageChinese
Published 2016
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Summary:目的对比3.0 T磁共振检查常用的6种序列所产生金属伪影的程度。方法制作4种实验铸造冠(钴铬合金、镍铬合金、低钛合金、纯钛),给实验犬依次佩戴4种实验铸造冠,进行3.0 T磁共振自旋回波T_1加权像(T_1W/SE)、反转恢复T_2加权像(T_2W/IR)、T_2*梯度回波(T_2*/GRE)、快速自旋回波T_2加权像(T_2W/FSE)、液体衰减反转恢复T_1加权像(T_1W/FLAIR)、螺旋桨技术T_2加权像(T_2W/PROP)6种序列的头部扫描,测量6种扫描序列扫描4种铸造冠时所产生的伪影最大面积和伪影涉及图像的层数,对测量结果进行对比。结果从扫描所得的图像及测量数据来看,无论扫描哪种金属,T_2*/GRE序列所产生的伪影最大面积和涉及的层数均明显大于其他序列(P〈0.01),其他5种序列间差异均无统计学意义(P〉0.05)。结论 T_2*/GRE序列产生金属伪影程度最大,其余5种序列所产生的金属伪影程度相当。
Bibliography:51-1169/R
artifacts; MRI sequences; fast spin echo; spin echo
Gao Lan,Lian Yunmin,Wang Pu,Huai Haili(Dept.of Prosthodontics, The Second Hospital of Hebei Medical University,Shijiazhuang 050000, China)
Objective This study aimed to observe and evaluate six 3.0 T sequences of metallic artifacts produced by metal dental crowns. Methods Dental crowns fabricated with four different materials(Co-Gr, Ni-Gr, Ti alloy and pure Ti) were evaluated. A mature crossbreed dog was used as the experimental animal, and crowns were fabricated for its upper right second premolar. Each crown was examined through head MRI(3.0 T) with six sequences, namely, T_1 weighted-imaging of spin echo(T_1W/SE), T_2 weighted-imaging of inversion recovery(T_2W/IR), T_2 star gradient echo(T_2*/GRE), T_2 weighted-imaging of fast spin echo(T_2W/FSE), T_1 weighted-imaging of fluid attenuate inversion recovery(T_1W/FLAIR), and T_2 weighted-imaging of propeller(T_2W/PROP). The largest area and layers of artifacts were assessed and compared. Results The
ISSN:1000-1182