Video Resources for Neurographics 2017 May/June; 7(3):199–210

From the article: Principles, Techniques, and Clinical Applications of Phase-Contrast Magnetic Resonance Cerebrospinal Fluid Imaging

Neurographics 2017 May/June; 7(3):199–210

Video 1: PC images can be played in a cine loop to mimic flow; this acquisition in the axial plane is at the craniocervical junction; velocity and flow measures are computed from these images.

Video 2: The video shows the 4D acquisitions displayed in a cine mode; each segment of the subarachnoid space can be represented as a single image; note that the CSF flow is not laminar, in contrast to blood flow in vessels.

Video 3a and Video 3b: Diagnostic and prognostic assessment of treatment of NPH by shunts or ETV can be made by observing CSF flow alterations in the aqueduct of Sylvius; note observed subjective changes in the phase shifts before (A) and after treatment (B); the latter shifts are slower.

Video 4: Patency of the endoscopic ventriculostomy for NPH can be assessed by sagittal PC-MRI acquisitions; note the flow signals in the suprasellar cistern from the third ventricle; flow in the aqueduct and foramen of Monroe can be seen as well.

Video 5: PC-MRI is an established technique to assess CSF flow abnormalities in Chiari 1 malformations; sagittal and axial sequences are used for quantitative assessment of flow at the craniocervical junction; note absent flow of CSF around the descended tonsils in this sagittal acquisition.

Video 6a an Video 6b: Assessment of syringomyelia associated with an intradural lipoma. A, Shows the phase sifts in the syrinx. B, Shows motion of the tumor, which exhibits slower phase shifts.

Video 7: Flow simulation studies can be used to generate 3D geometry of the cervical subarachnoid space as in this study of a healthy subject, showing idealized nerve roots.

Video 8a and Video 8b: Cine loop generated from a PC study before (A) and after ETV (B), showing the jet of CSF flowing into and from the third ventricle toward the suprasellar cistern.