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KMID : 0359720150330010026
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Journal of the Korean Neurological Association
2015 Volume.33 No. 1 p.26 ~ p.28
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Hyperintensity of Subarachnoid Space on FLAIR Images Caused by Supplemental Oxygen
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Choi Yun-Ju
Lee Seung-Han
Bae Chang-Beom
Park Ji-Yun
Kim Weol-Min
Oh Byeong-Cheol
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Abstract
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A hyperintensity in the subarachnoid space on fluid-attenuated inversion-recovery (FLAIR) images is often caused by diseases such as subarachnoid hemorrhage or meningitis. Oxygen has a known paramagnetic effect and also causes signal changes in the subarachnoid space on FLAIR images. These changes usually develop when the inspired air contains a high oxygen fraction. Here we present a patient with a hyperintensity in the subarachnoid space on FLAIR images whose inspired air contained only a low oxygen fraction.
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KEYWORD
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Fluid-attenuated inversion recovery (FLAIR), Oxygen, Subarachnoid space
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