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Fluid-attenuated inversion recovery
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<p>Fluid-attenuated inversion recovery (FLAIR) is a <a href="/facts/MRI_sequence/3625KbgU">magnetic resonance imaging sequence</a> with an <a href="/facts/Inversion_recovery/e2VKsKJ4">inversion recovery</a> set to null fluids. For example, it can be used in brain imaging to suppress <a href="/facts/Cerebrospinal_fluid/tcWG7hhv">cerebrospinal fluid</a> (CSF) effects on the image, so as to bring out the periventricular <a href="/facts/Hyperintensity/gfz8VxSA">hyperintense</a> lesions, such as <a href="/facts/Multiple_sclerosis/vghXl0IQ">multiple sclerosis</a> (MS) plaques. It was invented by Graeme Bydder, Joseph Hajnal, and Ian Young in the early 1990s. FLAIR can be used with both three-dimensional imaging (3D FLAIR) or two dimensional imaging (2D FLAIR). </p>