采用径向k空间轨迹和高度约束投影重建技术、具有亚秒级帧更新时间的3D时间分辨对比增强脑血管磁共振血管造影术
3D time-resolved contrast-enhanced cerebrovascular MR angiography with subsecond frame update times using radial k-space trajectories and highly constrained projection reconstruction.
作者信息
Wu Y, Kim N, Korosec F R, Turk A, Rowley H A, Wieben O, Mistretta C A, Turski P A
机构信息
Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI 53792, USA.
出版信息
AJNR Am J Neuroradiol. 2007 Nov-Dec;28(10):2001-4. doi: 10.3174/ajnr.A0772. Epub 2007 Oct 10.
Abstract
HYPR TRICKS is an acquisition method that combines radial k-space trajectories, sampling k-space at different rates (TRICKS), and a new strategy for image reconstruction that uses highly constrained backprojection reconstruction (HYPR). This approach provides 3D time-resolved contrast-enhanced MR angiograms of the cerebral vessels with subsecond frame update times and submillimeter in-plane spatial resolution. Artifacts are suppressed, and signal-to-noise ratio is well maintained, by using HYPR reconstruction.
摘要
HYPR TRICKS是一种采集方法，它结合了径向k空间轨迹、以不同速率对k空间进行采样（TRICKS）以及一种使用高度约束反投影重建（HYPR）的图像重建新策略。这种方法可提供脑血管的三维时间分辨对比增强磁共振血管造影，帧更新时间小于1秒，平面内空间分辨率达到亚毫米级。通过使用HYPR重建，伪影得到抑制，信噪比得到良好维持。
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