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Journal of Computer Assisted Tomography:

Intracranial Fluid Dynamics in Normal and Hydrocephalic States: Systems Analysis With Phase-Contrast Magnetic Resonance Imaging

de Marco, Giovanni PHD*; Idy-Peretti, Ilana MD, PHD†; Didon-Poncelet, Anne MD‡; Baledent, Olivier PHD*; Onen, Fannie MD§; Feugeas, Marie Cécile Henry MD, PHD

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Objective: To present a novel magnetic resonance (MR) method of analysis of cerebrospinal fluid (CSF) flow dynamics.

Methods: Fifty-one subjects were explored with phase-contrast cine MR imaging. There were 36 volunteers, 9 patients with normal pressure hydrocephalus (NPH), and 6 patients with asymptomatic ventricular dilation (VD). The transfer function XFRA/CSF from the arterial pulse waves (APWs) and the CSF pulse waves (CSFPWs) and the transfer function XFRCSF/SS from the CSF pulse waves (CSFPWs) and the sagittal sinus pulse waves (SSPWs) were studied separately.

Results: There was a significant difference in the amplitude spectrum of the XFRA/CSF of patients with VD and volunteers (P < 0.05) and in that of patients with NPH and volunteers (P = 0.005). The amplitude of the fundamental frequency was higher in the NPH group than in the VD group (P = 0.02). In patients with NPH, the amplitude spectrum of XFRCSF/SS showed an attenuation of the pulse wave components that significantly differed from the observed amplification in healthy subjects (P = 0.009) and patients with VD (P = 0.012).

Conclusion: This systems analysis method could help to detect increased venous compliance in VD and decreased venous compliance in NPH.

© 2004 Lippincott Williams & Wilkins, Inc.



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