CSF flow artifact is caused by the movement of CSF between the time of excitation and signal acquisition, resulting in a phase shift in the MRI signal. This can be particularly problematic in certain MRI sequences, such as fast spin echo (FSE) and gradient echo (GRE) sequences, which are sensitive to phase shifts.

Nov 23, 2012 · Normal CSF has inherent MRI properties of low signal intensity on T1-weighted sequences and high signal intensity on T2-weighted sequences. However, the normal CSF signal is frequently altered by superimposed flow phenomena that can confound interpretation.

A cerebrospinal fluid (CSF) flow MRI is a specialized type of MRI scan used to visualize the flow of cerebrospinal fluid within the brain and spinal canal. In a CSF flow MRI, the goal is to assess the dynamics of this fluid to ensure it is moving properly throughout the brain and spinal column.

Axial & sagittal T2 Weighted image through thoracic spine shows globular signal loss in dorsal subarachnoid space resulting from turbulent CSF flow.

Commonly encountered artifacts on MRI due to CSF circulation are as follows: I) GHOST ARTIFACTS. Phase mismapping or ‘Ghosting’ is a most common artifact due to CSF circulation. It is recognized by the replication ('ghosts') of the moving anatomy across the image in the direction of the phase encoding gradient (4). Cause:

Jun 28, 2020 · Normal thoracic spine MR: Artifactual increased signal in spinal cord due to Gibbs’ truncation artifact (TA) and artifactual decreased signal in CSF dorsal to thoracic cord due to turbulent CSF signal dephasing.

Provided axial and sagittal T2-weighted images through the thoracic spine show globular signal-void areas in the posterior subarachnoid space. No mass effect is noted. The current MRI findings on the provided images suggest artifacts resulting from CSF turbulent flow rather than spinal arteriovenous malformations.

Mar 28, 2017 · In the upper thoracic spine, the subarachnoid space posterior to the spinal cord is wide, and CSF flow artifact is common in this area. Turbulent CSF flow artifacts are seen as areas of low signal intensity on T2-weighted images and high signal intensity on T1-weighted images.

Radiology article on CSF leak MRI. Explore T1, T2, and STIR imaging insights, cases, symptoms, treatment, and imaging appearance of CSF leaks.

Oct 4, 2011 · The varied flow velocities and directions result in more rapid dephasing and signal loss termed “intravoxel dephasing.” A commonly encountered CSF flow artifact is the signal void in the dorsal subarachnoid space on sagittal T2-weighted images of the thoracic spine.