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. 2021 Oct 27;29(1):31–41. doi: 10.1016/j.acra.2021.10.019

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© 2021 The Association of University Radiologists. Published by Elsevier Inc. All rights reserved.

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Olfactory fMRI with n-butanol. Fused 3D T1 and bold images shows activity in leftorbitofrontal and entorhinal region in a post-infectious OD case (A); right trigeminosensorial region in a COVID-19 related anosmia case (B); bilateral trigeminosensorial regions more prominent on the right side, without discernible activity in the bilateral entorhinal regions in a COVID-19 related anosmia case (C); bilateral orbitofrontal region in a COVID-19 related anosmia case (D); disorganized, diffuse activity outside the olfactory region in a post-infectious OD case (E).