FLOWING CEREBROSPINAL-FLUID IN NORMAL AND HYDROCEPHALIC STATES - APPEARANCE ON MR IMAGES
FLOWING CEREBROSPINAL-FLUID IN NORMAL AND HYDROCEPHALIC STATES - APPEARANCE ON MR IMAGES
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DOI：
10.1148/radiology.159.3.3704142
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发表时间：
1986-06-01
期刊：
影响因子：
19.7
通讯作者：
BURGOYNE, B
中科院分区：
文献类型：
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作者：
BRADLEY, WG;KORTMAN, KE;BURGOYNE, B
本文对16例健康人及32例不同类型脑积水患者（慢性常压脑积水20例，急性交通性脑积水7例，空出性脑积水5例）的脑导水管及侧脑室脑脊液在磁共振（MR）图像上的信号强度进行评价。脑导水管内常见的低信号强度，可以认为是脑脊液脉动运动的反映，而脑脊液脉动运动与心脏周期有关。虽然在健康个体中也可以观察到这种“输水管道流动空洞现象”，但在慢性通讯性NPH患者中最为明显；在急性交流性脑积水患者中不太明显；在萎缩患者中最不明显。已知萎缩时心室顺应性基本正常；急性交通性脑积水轻度减少；NPH严重下降。导水管信号丢失的程度被认为反映了脉冲性脑脊液运动的速度，这反过来又取决于相对心室顺应性和表面积。
The signal intensity of the cerebrospinal fluid (CSF) in the cerebral aqueduct and lateral ventricles on magnetic resonance (MR) images was evaluated in 16 healthy individuals and in 32 patients with various forms of hydrocephalus (20 with chronic normal pressure hydrocephalus [NPH], seven with acute communicating hydrocephalus, and five with hydrocephalus ex vacuo [atrophy]). The low signal intensity frequently observed in the cerebral aqueduct is believed to reflect the pulsatile motion of CSF, which is related to the cardiac cycle. While this "aqueductal flow void phenomenon can be observed in healthy individuals, it is most pronounced in patients with chronic, communicating NPH; is less evident in patients with acute, communicating hydrocephalus; and is least evident in patients with atrophy. Ventricular compliance is known to be essentially normal in atrophy; mildly decreased in acute, communicating hydrocephalus; and severely decreased in NPH. The degree of aqueductal signal loss is believed to reflect the velocity of the pulsatile CSF motion, which in turn depends on the relative ventricular complicance and surface area.