3D amplified MRI (aMRI).
3D amplified MRI (aMRI).
复制标题
三维磁共振成像（aMRI）。
DOI：
10.1002/mrm.28797
复制
发表时间：
2021-09
影响因子：
3.3
通讯作者：
Holdsworth SJ
中科院分区：
文献类型：
--
作者：
Terem I;Dang L;Champagne A;Abderezaei J;Pionteck A;Almadan Z;Lydon AM;Kurt M;Scadeng M;Holdsworth SJ
放大MRI（aMRI）已被引入作为一种新的方法，检测和可视化的脉动脑运动在2D。在这里，我们通过引入一种新的3D aMRI方法来改进aMRI。开发并测试了3D aMRI在所有三个方向上放大亚体素运动的能力。此外，对健康志愿者在3 T下采集的多切片和3D（体积）平衡稳态自由进动电影数据和相位对比（PC‐MRI）进行了3D aMRI与2D aMRI的定性比较。从体积3D aMRI数据产生光流图和4D动画。与2D aMRI相比，3D aMRI具有更好的图像质量和更少的运动伪影。观察到组织运动与PC-MRI匹配，主要脑组织移位发生在头尾方向。光流图捕捉脑组织的运动，并通过周围组织的相对运动显示脑室形状的物理变化。4D动画显示了完整的脑组织和脑脊液（CSF）运动，有助于突出脑室的“活塞式”运动。在这里，我们介绍了一种新的3D aMRI方法，使人们能够以惊人的细节可视化放大的心脏和CSF诱导的大脑运动。3D aMRI捕捉大脑运动的图像质量优于2D aMRI，并支持更大的放大系数。3D aMRI的光流图和4D动画可能会为影响大脑和脑液生物力学的神经系统疾病开辟令人兴奋的应用。
Amplified MRI (aMRI) has been introduced as a new method of detecting and visualizing pulsatile brain motion in 2D. Here, we improve aMRI by introducing a novel 3D aMRI approach. 3D aMRI was developed and tested for its ability to amplify sub‐voxel motion in all three directions. In addition, 3D aMRI was qualitatively compared to 2D aMRI on multi‐slice and 3D (volumetric) balanced steady‐state free precession cine data and phase contrast (PC‐MRI) acquired on healthy volunteers at 3T. Optical flow maps and 4D animations were produced from volumetric 3D aMRI data. 3D aMRI exhibits better image quality and fewer motion artifacts compared to 2D aMRI. The tissue motion was seen to match that of PC‐MRI, with the predominant brain tissue displacement occurring in the cranial‐caudal direction. Optical flow maps capture the brain tissue motion and display the physical change in shape of the ventricles by the relative movement of the surrounding tissues. The 4D animations show the complete brain tissue and cerebrospinal fluid (CSF) motion, helping to highlight the “piston‐like” motion of the ventricles. Here, we introduce a novel 3D aMRI approach that enables one to visualize amplified cardiac‐ and CSF‐induced brain motion in striking detail. 3D aMRI captures brain motion with better image quality than 2D aMRI and supports a larger amplification factor. The optical flow maps and 4D animations of 3D aMRI may open up exciting applications for neurological diseases that affect the biomechanics of the brain and brain fluids.
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影响因子：
3.3
作者：
Holdsworth, Samantha J.;Rahimi, Mahdi Salmani;Moseley, Michael E.
通讯作者：
Moseley, Michael E.
影响因子：
19.7
作者：
ENZMANN, DR;PELC, NJ
通讯作者：
PELC, NJ
血管周空间，肾小球功能障碍和小血管疾病。
DOI：
10.1042/cs20160381
发表时间：
2017-09-01
期刊：
Clinical science (London, England : 1979)
影响因子：
--
作者：
Mestre H;Kostrikov S;Mehta RI;Nedergaard M
通讯作者：
Nedergaard M
影响因子：
2.9
作者：
Adams, Ayodeji L.;Kuijf, Hugo J.;Zwanenburg, Jaco J. M.
通讯作者：
Zwanenburg, Jaco J. M.
影响因子：
2.4
作者：
Knutsen, Andrew K.;Magrath, Elizabeth;Pham, Dzung L.
通讯作者：
Pham, Dzung L.