MR cerebral venography: normal exam on Phase-contrast MRV

MR cerebral venography: normal exam on Phase-contrast MRV

MR cerebral venography: normal exam on Phase-contrast MRV


Introduction

MR cerebral venography is often used to examine the intracranial venous system, particularly in the evaluation of dural sinus thrombosis. 
The purpose of this module is to depict the normal intracranial venous anatomy in order to facilitate the interpretation of MRV and thereby help avoid potential pitfalls in the diagnosis of dural venous sinus thrombosis.
We have also created an interactive map of the brain venous vascular territories, although the cerebral venous vascular territories are highly variable and not as well known as the arterial vascular territories.
 

Material and methods

This cerebral Magnetic Resonance Venography (MRV) was carried out on a healthy female patient, using a Siemens 1.5T MRI.
A sagittal phase-contrast MRV was acquired (Matrix 512X512, thickness 1.40 mm) and MPR reconstructions were created in axial and coronal planes.
Flow encoded images are displayed by default at the start of this module, but we’ve added the PC T1 images to allow the user to better see the anatomical parts of the brain, which can be used as a landmark, especially for the brain venous territories.
Furthermore, brain venography MR images were post processed using the maximum (pixel) intensity projection (MIP) method, generating 60 MIP projections at 6° increments, in horizontal and vertical rotations. 
The anatomical structures were labeled by Antoine Micheau MD (Radiologist, Montpellier – France).
The venous territories of the brain were drawn and labeled on this exam according to the few bibliographic sources available and with a poor accuracy due to the high variability of the cerebral venous territories.

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