Fig. 1

The correlation of T2 FLAIR findings with¹⁸ F-FDG PET features in Anti-NMDAR encephalitis patients. The first row (A) shows a 23-year-old woman with a history of psychiatric symptom and epileptic seizures for 9 weeks. Axial T2 FLAIR image shows shallow sulci and brain tissue swelling located in the right frontal lobe. The corresponding axial, coronal and sagittal FDG PET images show an obvious uptake of FDG. The second row (B) shows a 31-year-old man with a history of epileptic seizures for 4 weeks. Axial T2 FLAIR image shows increased signal in the sulci of right parietal lobe. The corresponding axial, coronal and sagittal FDG PET images show this linear hypermetabolic lesion. The third row (C) shows a 20-year-old woman with a history of psychiatric symptom, memory impairment, epileptic seizures and movement disorders for 3 weeks. Axial T2 FLAIR image shows increased signal on brain gray matter and adjacent white matter of left temporal lobe. The corresponding axial, coronal and sagittal FDG PET images show different degrees of increased metabolism. The last row (D) shows a 50-year-old woman with a history of psychiatric symptom, memory impairment and movement disorders for 5 weeks. Axial T2 FLAIR image shows bilateral and diffused increased signal in brain linear structure. The corresponding axial, coronal and sagittal FDG PET images show hypometabolism of basal ganglia