BRAIN MOTION - MEASUREMENT WITH PHASE-CONTRAST MR IMAGING
BRAIN MOTION - MEASUREMENT WITH PHASE-CONTRAST MR IMAGING
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DOI：
10.1148/radiology.185.3.1438741
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发表时间：
1992-12-01
期刊：
影响因子：
19.7
通讯作者：
PELC, NJ
中科院分区：
文献类型：
--
作者：
ENZMANN, DR;PELC, NJ
采用相位对比电影磁共振（MR）脉冲序列对10名健康志愿者在心动周期期间的脑运动进行了前瞻性测量。主要的大脑叶，间脑，脑干，小脑，小脑扁桃体和脊髓进行了研究。脑运动的总体模式显示颈动脉收缩后不久中央结构（间脑、脑干和小脑扁桃体）的尾部运动，同时主要大脑叶和小脑后半球的头部运动。除小脑扁桃体位移较大（0.4 mm +/- 0.16 [平均值+/-平均值标准误]）外，所有结构的峰值脑位移均在0.1-0.5 mm范围内。中央结构的尾部运动并不同时发生，而是以尾侧到喙侧和后到前的顺序进行，首先在小脑扁桃体中看到，然后在间脑（下丘脑）中看到。低位脑干和小脑扁桃体的尾部运动与颈段蛛网膜下腔脑脊液的尾部运动同步。与脑干运动相比，导水管中的振荡流被延迟。
Brain motion during the cardiac cycle was measured prospectively in 10 healthy volunteers by using a phase-contrast cine magnetic resonance (MR) pulse sequence. The major cerebral lobes, diencephalon, brain stem, cerebellum, cerebellar tonsils, and spinal cord were studied. The overall pattern of brain motion showed caudal motion of the central structures (diencephalon, brain stem, and cerebellar tonsils) shortly after carotid systole, with concurrent cephalic motion of the major cerebral lobes and posterior cerebellar hemisphere. Peak brain displacement was in the range of 0.1-0.5 mm for all the structures except the cerebellar tonsils, which had greater displacement (0.4 mm +/- 0.16 [mean +/- standard error of mean]). Caudal motion of the central structures did not occur simultaneously but progressed in a caudal-to-rostral and posterior-to-anterior sequence, being seen first in the cerebellar tonsils and then later in the diencephalon (hypothalamus). Caudal motion of the low brain stem and cerebellar tonsil was simultaneous with caudal motion of cerebrospinal fluid in the cervical subarachnoid space. Oscillatory flow in the aqueduct was delayed compared with brain stem motion.