What does FLAIR show on MRI?

Fluid-attenuated inversion recovery (FLAIR) is an MRI technique that shows areas of tissue T2 prolongation as bright while suppressing (darkening) cerebrospinal fluid (CSF) signal, thus clearly revealing lesions in proximity to CSF, such as cerebral cortical lesions.

What is FLAIR stroke?

In acute stroke patients the intensity of a fluid attenuated inversion recovery (FLAIR) lesion in the region of diffusion restriction is associated with time from symptom onset.

What is T2 FLAIR MRI?

FLAIR MRI is a heavily T2-weighted technique that dampens the ventricular (ie, free-water) CSF signal. Thus, the highest signals on the sequence are from certain brain parenchymal abnormalities, such as MS lesions, while the CSF appears black.

What is flair image?

Fluid-attenuated inversion recovery (FLAIR) is an MRI sequence with an inversion recovery set to null fluids. For example, it can be used in brain imaging to suppress cerebrospinal fluid (CSF) effects on the image, so as to bring out the periventricular hyperintense lesions, such as multiple sclerosis (MS) plaques.

What is vascular hyperintensity?

Background: Fluid attenuated inversion recovery (FLAIR) vascular hyperintensity (FVH) is a novel radiographic marker detected in acute ischemic stroke (AIS) patients, which is linked to slow blood flow and potentially salvageable brain tissue.

What is bright on T2 flair?

CSF is dark on T1-weighted imaging and bright on T2-weighted imaging. A third commonly used sequence is the Fluid Attenuated Inversion Recovery (Flair).

Which MRI sequence is most informative for ischemic stroke and why?

—Gradient-echo and susceptibility-weighted sequences are the most sensitive sequences for depicting hemorrhagic transformation in patients with ischemic stroke, particularly susceptibility-weighted imaging, which is routinely performed in all patients with stroke at our institution.