利用3特斯拉磁共振成像对视神经中央T2低信号的新发现。
Novel finding of optic nerve central T2 hypointensity utilizing 3 Tesla MR imaging.
作者信息
Riascos Roy, Heymann John C, Hakimelahi Reza, Hasan Khader, Sargsyan Ashot, Barr Yael R, Tom James, Alperin Noam, Kramer Larry A
机构信息
Department of Diagnostic and Interventional Imaging, The University of Texas in Houston
Department of Radiology, University of Texas Medical Branch, Houston, TX, USA.
出版信息
Neuroradiol J. 2015 Apr;28(2):133-6. doi: 10.1177/1971400915576668. Epub 2015 Apr 13.
We sought to report a central T2 hypointensity within the optic nerve on 3 T MRI studies obtained as part of the NASA Flight Medicine Visual Impairment Intracranial Pressure Protocol that had not been described previously. Twenty-one astronauts, who had undergone MRI of both orbits with direct coronal T2 sequences between 2010 and 2012, were retrospectively included. Two of the astronauts did not have previous exposure to microgravity at the time of their scans. A central T2 hypointensity was observed in 100% of both right and left eyes. It was completely visualized throughout the nerve course in 15 right eyes (71.4%) and in 19 left eyes (90.5%).We describe a new finding seen in all study participants: a central T2 hypointensity in the epicenter of the optic nerve. We speculate that this T2 hypointensity may represent flow voids caused by the central retinal vessels.
我们试图报告在作为美国国家航空航天局飞行医学视觉损伤颅内压方案一部分所进行的3T磁共振成像（MRI）研究中，视神经内出现的一种中央T2低信号，这是此前未曾描述过的情况。对2010年至2012年间接受过双眼眼眶直接冠状面T2序列MRI检查的21名宇航员进行了回顾性研究。其中两名宇航员在扫描时未曾有过微重力暴露经历。在所有受试者的右眼和左眼均观察到中央T2低信号。在15只右眼（71.4%）和19只左眼（90.5%）中，整个神经走行全程均能清晰看到该低信号。我们描述了在所有研究参与者中均出现的一项新发现：视神经中心的中央T2低信号。我们推测这种T2低信号可能代表视网膜中央血管造成的血流空洞。
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