与标准线圈相比，专用表面线圈在牙科磁共振成像中的应用可提供更高的图像质量。
Application of a Dedicated Surface Coil in Dental MRI Provides Superior Image Quality in Comparison with a Standard Coil.
作者信息
Gradl J, Höreth M, Pfefferle T, Prager M, Hilgenfeld T, Gareis D, Bäumer P, Heiland S, Bendszus M, Hähnel S
机构信息
Department of Neuroradiology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.
Heidelberg University School of Medicine, Heidelberg, Germany.
出版信息
Clin Neuroradiol. 2017 Sep;27(3):371-378. doi: 10.1007/s00062-016-0500-9. Epub 2016 Feb 11.
PURPOSE
Purpose of our research was the evaluation of a dedicated dental surface coil in comparison with a standard head and neck coil for the improvement of dental magnetic resonance imaging (MRI).
MATERIALS AND METHODS
Axial T1-weighted spin echo MRI was performed by using a newly developed dental coil for MRI and a standard head and neck coil on five volunteers. In addition, MRI was implemented with dental coil on five patients. Using the Wilcoxon test, we compared the volunteers' signal-to-noise ratio (SNR) of a variety of anatomical structures (e.g., hard tooth tissue, pulp tissue, bone, muscle tissue). Also subjective evaluation of image quality was performed on both volunteers and patients.
RESULTS
Compared with the head and neck coil, the mean SNR was 3.5-fold higher on an average with the dental coil (range: from 2.7 [masseter muscle] to 4.6 [pulp tissue]). That difference was statistically significant for all evaluated structures. The higher SNR also resulted in a superior image quality as determined by subjective evaluation.
CONCLUSION
Dental MRI benefits profoundly from using a dedicated dental coil.
目的
我们研究的目的是评估一种专用牙科表面线圈与标准头颈线圈相比，对改善牙科磁共振成像（MRI）的效果。
材料与方法
对五名志愿者使用新开发的牙科MRI线圈和标准头颈线圈进行轴向T1加权自旋回波MRI检查。此外，对五名患者使用牙科线圈进行MRI检查。我们使用威尔科克森检验比较了志愿者各种解剖结构（如硬牙组织、牙髓组织、骨骼、肌肉组织）的信噪比（SNR）。同时对志愿者和患者的图像质量进行了主观评估。
结果
与头颈线圈相比，牙科线圈的平均SNR平均高出3.5倍（范围：从2.7[咬肌]到4.6[牙髓组织]）。所有评估结构的这种差异具有统计学意义。主观评估表明，较高的SNR也带来了更好的图像质量。
结论
使用专用牙科线圈对牙科MRI有极大的益处。
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