7T高分辨率神经血管成像：动脉自旋标记灌注、四维磁共振血管造影和黑血磁共振成像。
High-Resolution Neurovascular Imaging at 7T: Arterial Spin Labeling Perfusion, 4-Dimensional MR Angiography, and Black Blood MR Imaging.
作者信息
Shao Xingfeng, Yan Lirong, Ma Samantha J, Wang Kai, Wang Danny J J
机构信息
Laboratory of FMRI Technology (LOFT), USC Mark & Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine, University of Southern California, 2025 Zonal Avenue, Los Angeles, CA 90033, USA.
Laboratory of FMRI Technology (LOFT), USC Mark & Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine, University of Southern California, 2025 Zonal Avenue, Los Angeles, CA 90033, USA; Department of Neurology, Keck School of Medicine, University of Southern California, 2025 Zonal Avenue, Los Angeles, CA 90033, USA.
出版信息
Magn Reson Imaging Clin N Am. 2021 Feb;29(1):53-65. doi: 10.1016/j.mric.2020.09.003. Epub 2020 Nov 2.
Ultrahigh field offers increased resolution and contrast for neurovascular imaging. Arterial spin labeling methods benefit from an increased intrinsic signal-to-noise ratio of MR imaging signal and a prolonged tracer half-life at ultrahigh field, allowing the visualization of layer-dependent microvascular perfusion. Arterial spin labeling-based time-resolved 4-dimensional MR angiography at 7T provides a detailed depiction of the vascular architecture and dynamic blood flow pattern with high spatial and temporal resolutions. High-resolution black blood MR imaging at 7T allows detailed characterization of small perforating arteries such as lenticulostriate arteries. All techniques benefit from advances in parallel radiofrequency transmission technologies at ultrahigh field.
超高场为神经血管成像提供了更高的分辨率和对比度。动脉自旋标记方法受益于磁共振成像信号固有的信噪比增加以及在超高场下示踪剂半衰期的延长，从而能够实现对层依赖型微血管灌注的可视化。基于动脉自旋标记的7T时间分辨四维磁共振血管造影能够以高空间和时间分辨率详细描绘血管结构和动态血流模式。7T高分辨率黑血磁共振成像能够对诸如豆纹动脉等小穿支动脉进行详细特征描述。所有这些技术都受益于超高场并行射频传输技术的进步。
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