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Representative magnetic resonance (MR) images of central nervous system abnormalities in patients abusing nitrous oxide (N2O). (a) MR image of cervical vertebrae showing a high T2 signal. (b) T2‐weighted image from cervical MRI showing an inverted “V” sign in the posterior funiculus of the spinal cord. (c) magnetic resonance imaging (MRI) of the skull showing a T2FLAIR hyperintense signal in the right radiation coronal area. (d) Brain MRI showing brain atrophy
