Influence of the compliance of the neck arteries and veins on the measurement of intracranial volume change by phase-contrast MRI.
Influence of the compliance of the neck arteries and veins on the measurement of intracranial volume change by phase-contrast MRI.
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DOI：
10.1002/jmri.21925
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发表时间：
2009-10
影响因子：
4.4
通讯作者：
Alperin, Noam
中科院分区：
文献类型：
--
作者：
Tain, Rong-Wen;Ertl-Wagner, Birgit;Alperin, Noam
关键词：
评估颈部动脉和静脉血管顺应性对心动周期内颅内容积变化测量的影响。在两个不同的位置通过MRI相位对比对动脉和静脉血流进行成像，一个靠近颅底（上部），另一个低于2-3 cm，在C3水平附近（下部）。最大颅内容积变化（ICVC）测量值分别来自上部和下部位置的动脉流入和静脉流出速率之间的瞬时差异，以评估由两个不同成像位置界定的血管节段顺应性的影响。在本实验中，颅脊髓脑脊液流动的成像位置是一个恒定变量。使用较低位置获得的收缩期ICVC始终大于使用较高位置时。动脉和静脉血流动力学之间的比较显示，与动脉相比，静脉中的血流动力学和管腔面积的变化要大得多，这解释了静脉对颅内体积变化测量的较大影响。动脉流入和静脉流出应在靠近颅底（C1-C2）的水平采样，以尽量减少动脉顺应性和静脉可膨胀性的影响，以可靠地测量ICVC。
To assess the influence of arterial and venous vascular compliances in the neck region on the measurement of the change in intracranial volume during the cardiac cycle. Arterial and venous blood flows were imaged by MRI phase contrast at two different locations, one close to the skull base (upper) and one 2-3 cm lower, around C3 level (lower). Maximal intracranial volume change (ICVC) measurements were derived from the momentary differences between the arterial inflow and venous outflow rates at the upper and lower locations separately to assess the influence of the compliances of the vessel segments bounded by the two different imaging locations. Imaging location for the cranio-spinal cerebrospinal fluid flow was a constant variable in this experiment. The systolic ICVC obtained using the lower location was consistently larger than when using the upper location. Comparison between arterial and venous flow dynamics revealed a much larger changes in flow dynamic and lumen areas in the veins compared with the arteries, which explain the large venous influence on the intracranial volume change measurement. Arterial inflow and venous outflow should be sampled at a level close to the skull base (C1-C2) to minimize the influence of the compliance of arteries and the collapsibility of veins for a reliable measurement of ICVC.
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