[两种磁共振去伪影技术在不同烤瓷熔附金属冠成像中的比较]
[Comparison of the two magnetic resonance deartifact techniques in imaging of different porcelain-fused-to-metal crowns].
作者信息
Li Wen-Jin, Niu Jin-Liang, Zhu Li, Wang Yu, An Ying, Zhang Shuang-Yuan
机构信息
Dept. of Stomatology, The Second Hospital of Shanxi Medical University, Taiyuan 030001, China.
Dept. of Radiology, The Second Hospital of Shanxi Medical University, Taiyuan 030001, China.
出版信息
Hua Xi Kou Qiang Yi Xue Za Zhi. 2019 Feb 1;37(1):66-69. doi: 10.7518/hxkq.2019.01.013.
OBJECTIVE
This study aimed to compare the porcelain-fused-to-metal (PFM) crown artifact in the magnetic resonance imaging (MRI) of the two magnetic resonance deartifact techniques in studying the application value of the propeller-fast spin-echo T2-weighted sequence (FSE T2WI) in troubleshooting PFM crown artifacts.
METHODS
A total of 48 patients with right mandible first molar crown who underwent MRI head examination were chosen as subjects in the study. According to different metal substrates, PFM crowns were divided to three types, namely, nickel-chromium alloy crown, cobalt-chromium alloy crown and titanium crown. The patients received two MRI scan sequences, that is, FSE T2WI and propeller-FSE T2WI sequences. The MRI artifacts areas in two sequences were measured.
RESULTS
The difference between FSE T2WI and propeller-FSE T2WI sequences in three kinds of PFM crown was significant (P<0.05).
CONCLUSIONS
Propeller-FSE T2WI sequence technique can effectively reduce the metal artifacts of various PFM crowns.
目的
本研究旨在比较两种磁共振去伪影技术在研究螺旋桨快速自旋回波T2加权序列（FSE T2WI）排除烤瓷熔附金属（PFM）冠伪影应用价值时的PFM冠伪影情况。
方法
选取48例接受头颅MRI检查且右下颌第一磨牙冠修复的患者作为研究对象。根据金属基底不同，将PFM冠分为3种类型，即镍铬合金冠、钴铬合金冠和钛冠。患者接受两种MRI扫描序列，即FSE T2WI和螺旋桨FSE T2WI序列。测量两种序列中的MRI伪影面积。
结果
3种PFM冠在FSE T2WI和螺旋桨FSE T2WI序列间差异有统计学意义（P<0.05）。
结论
螺旋桨FSE T2WI序列技术可有效减少各种PFM冠的金属伪影。
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