How is FLAIR different from T1?
T1-weighted fluid-attenuated inversion recovery (FLAIR) sequence is a relatively new pulse sequence for intracranial MR imaging. The overall image contrast was judged to be superior on T1-weighted FLAIR images compared with T1-weighted FSE images by all neuroradiologists.
What is a T1 FLAIR on an MRI?
T1-FLAIR stands for T1-weighted-Fluid-Attenuated Inversion Recovery. This nomenclature began to arise in the late 1990s to denote an inversion recovery sequence with dark CSF and other T1-like properties made possible by a medium TI coupled with fast spin-echo signal acquisition.
How can you tell the difference between T1 and T2-weighted MRI?
In general, T1- and T2-weighted images can be easily differentiated by looking the CSF. 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).
Does T2 FLAIR mean MS?
T2/FLAIR images show the total amount of scar from MS from its onset. The pictures show both old and new inflammation. T2/FLAIR lesions can directly account for some symptoms. For example, a brainstem lesion can cause room spinning sensations and balance problems.
What is T2 and FLAIR Hyperintensities?
Focal hyperintensities in the subcortical white matter demonstrated by T2-weighted or FLAIR images are a common incidental finding in patients undergoing brain MRI for indications other than stroke. They are indicative of chronic microvascular disease.
How can you tell the difference between T1 and T2 MRI?
The best way to tell the two apart is to look at the grey-white matter. T1 sequences will have grey matter being darker than white matter. T2 weighted sequences, whether fluid attenuated or not, will have white matter being darker than grey matter. Read more about FLAIR sequence.
What does a T2 FLAIR mean?
T2/FLAIR. T2/FLAIR images show the total amount of scar from MS from its onset. The pictures show both old and new inflammation. T2/FLAIR lesions can directly account for some symptoms. For example, a brainstem lesion can cause room spinning sensations and balance problems.