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T2-weighted FLAIR and T2-weighted 3D cSSFSE of a healthy male adult, age 42. Top enlargement of the yellow box. (a) FLAIR image depicts hypointense CSF in the SAS and intermediate hyperintense PSD. (b) 3D cSSFSE image depicts hyperintense CSF in SAS and intermediate hyperintense PSD. CSF, cerebrospinal fluid; cSSFSE, centric ky–kz single-shot fast spin echo; FLAIR, fluid attenuated inversion recovery; PSD, parasagittal dura; SAS, subarachnoid space.
