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首页> 外文期刊>Journal of Cerebral Blood Flow and Metabolism: Official Journal of the International Society of Cerebral Blood Flow and Metabolism >A phase-contrast MRI study of physiologic cerebral venous flow.
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A phase-contrast MRI study of physiologic cerebral venous flow.

机译：生理性脑静脉血流的相衬MRI研究。

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Although crucial in regulating intracranial hydrodynamics, the cerebral venous system has been rarely studied because of its structural complexity and individual variations. The purpose of our study was to evaluate the organization of cerebral venous system in healthy adults. Phase-contrast magnetic resonance imaging (PC-MRI) was performed in 18 healthy volunteers, in the supine position. Venous, arterial, and cerebrospinal fluid (CSF) flows were calculated. We found heterogeneous individual venous flows and variable side dominance in paired veins and sinuses. In some participants, the accessory epidural drainage preponderated over the habitually dominant jugular outflow. The PC-MRI enabled measurements of venous flows in superior sagittal (SSS), SRS (straight), and TS (transverse) sinuses with excellent detection rates. Pulsatility index for both intracranial (SSS) and cervical (mainly jugular) levels showed a significant increase in pulsatile blood flow in jugular veins as compared with that in SSS. Mean cervical and cerebral arterial blood flows were 714+/-124 and 649+/-178 mL/min, respectively. Cerebrospinal fluid aqueductal and cervical stroke volumes were 41+/-22 and 460+/-149 microL, respectively. Our results emphasize the variability of venous drainage for side dominance and jugular/epidural organization. The pulsatility of venous outflow and the role it plays in the regulation of intracranial pressure require further investigation.
机译：尽管对于调节颅内流体动力学至关重要，但由于其结构复杂性和个体差异，很少研究脑静脉系统。我们研究的目的是评估健康成年人的脑静脉系统的组织。在18位健康志愿者的仰卧位进行相衬磁共振成像（PC-MRI）。计算静脉，动脉和脑脊液（CSF）流量。我们在成对的静脉和鼻窦中发现异种个体静脉流动和可变的侧支配。在一些参与者中，硬膜外辅助引流优先于习惯性优势颈静脉流出。 PC-MRI能够以优异的检测率测量上矢状（SSS），SRS（直）和TS（横）窦的静脉血流。与SSS相比，颅内（SSS）和宫颈（主要是颈椎）水平的搏动指数均显示颈静脉内搏动血流量显着增加。子宫颈和脑动脉的平均血流量分别为714 +/- 124和649 +/- 178 mL / min。脑脊液引流液和宫颈中风量分别为41 +/- 22和460 +/- 149 microL。我们的研究结果强调了侧支配静脉和颈/硬膜外组织的静脉引流的可变性。静脉流出的搏动性及其在颅内压调节中的作用尚待进一步研究。

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