用于磁共振引导介入的磁共振兼容的室内立体三维显示器。
An MR-compatible stereoscopic in-room 3D display for MR-guided interventions.
作者信息
Brunner Alexander, Groebner Jens, Umathum Reiner, Maier Florian, Semmler Wolfhard, Bock Michael
机构信息
Department of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany,
出版信息
MAGMA. 2014 Aug;27(4):277-82. doi: 10.1007/s10334-013-0423-2. Epub 2013 Dec 10.
BACKGROUND AND METHODS
A commercial three-dimensional (3D) monitor was modified for use inside the scanner room to provide stereoscopic real-time visualization during magnetic resonance (MR)-guided interventions, and tested in a catheter-tracking phantom experiment at 1.5 T. Brightness, uniformity, radio frequency (RF) emissions and MR image interferences were measured.
RESULTS AND DISCUSSION
Due to modifications, the center luminance of the 3D monitor was reduced by 14%, and the addition of a Faraday shield further reduced the remaining luminance by 31%. RF emissions could be effectively shielded; only a minor signal-to-noise ratio (SNR) decrease of 4.6% was observed during imaging. During the tracking experiment, the 3D orientation of the catheter and vessel structures in the phantom could be visualized stereoscopically.
背景与方法
对一台商用三维（3D）显示器进行改装，使其能在扫描室内使用，以在磁共振（MR）引导介入过程中提供立体实时可视化，并在1.5T的导管跟踪模型实验中进行测试。测量了亮度、均匀性、射频（RF）发射和MR图像干扰。
结果与讨论
由于改装，3D显示器的中心亮度降低了14%，添加法拉第屏蔽进一步将剩余亮度降低了31%。RF发射可得到有效屏蔽；成像期间仅观察到4.6%的轻微信噪比（SNR）下降。在跟踪实验中，模型中导管和血管结构的三维方向能够以立体方式可视化。
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