Patient's Specific Modeling of the Spinal Canal Hydrodynamics using Bond Graph Technique and Magnetic Resonance Imaging

机译：使用键图技术和磁共振成像的患者对椎管水动力学的特定建模

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The spinal canal contributes to the overall compliance of the craniospinal compartment. Thus it plays an important role in the regulation of craniospinal hydrodynamics and intracranial pressure. Limited information is available concerning the spinal canal compliance and its distribution along the spinal canal. Current methods of compliance measurement require injection of fluid into the spinal canal cerebrospinal fluid (CSF) spaces and thus are associated with morbidity. A noninvasive method of deriving the spinal canal compliance and its distribution is being developed. A motion-sensitive Magnetic Resonance Imaging technique is employed to quantify the oscillating CSF flow at several locations along the spinal canal. The differential equations governing CSF flow are derived using Bond Graph methodology. Flow dynamics satisfying the differential equations is then compared iteratively with actual flow measurements to yield spinal canal compliance, and CSF resistance and inertia. The model was validated using CSF flow measurements obtained from 4 healthy volunteers. The model predicted CSF flow was compared with measured CSF flow waveforms at intermediate locations. Compliance values ranged from 1.7 mL/mmHg to 45.2 mL/mmHg. The model further provides new information about the relative contribution sub segments of the canal to the overall spinal canal compliance.

机译：脊椎管有助于颅脊腔室的整体顺应性。因此，它在调节颅骨水动力和颅内压中起重要作用。关于椎管顺应性及其沿椎管分布的信息有限。当前的顺应性测量方法需要将流体注射到椎管脑脊髓液（CSF）空间中，因此与发病率相关。正在开发一种非侵入性的方法来推导椎管顺应性及其分布。运动敏感的磁共振成像技术用于量化沿脊椎管几个位置的振荡CSF流。使用Bond Graph方法推导了控制CSF流量的微分方程。然后将满足微分方程的流量动力学与实际流量测量进行迭代比较，以得出椎管顺应性，CSF阻力和惯性。使用从4名健康志愿者那里获得的CSF流量测量结果验证了该模型。将模型预测的CSF流量与中间位置测得的CSF流量波形进行比较。顺应性值范围为1.7 mL / mmHg至45.2 mL / mmHg。该模型还提供了有关根管对整个椎管顺应性的相对贡献子段的新信息。

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《Conference on Physiology and Function: Methods, Systems, and Applications Feb 16-18, 2003 San Diego, California, USA》|2003年|p.5-10|共6页
会议地点 San Diego CA(US)
作者
Naresh Yallapragada; Noam Alperin;
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作者单位

Dept. of Radiology, University of Illinois, 830 S Wood St (M/C 711), Chicago, IL - 60612;

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会议组织
原文格式 PDF
正文语种 eng
中图分类基础医学;
关键词
spinal canal compliance; cerebrospinal fluid; intracranial pressure; magnetic resonance imaging; bond graph;

机译：椎管顺应性;脑脊液;颅内压;磁共振成像;结合图;

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Patient's Specific Modeling of the Spinal Canal Hydrodynamics using Bond Graph Technique and Magnetic Resonance Imaging

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