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Fig 2. Right temporal lobe epilepsy. Selective amygdalohippocampectomy was performed. A, The circle shows the seed area for the presurgical tractography. An identical seed area was used for drawing the postsurgical tractography. B, Tractography of the optic radiation (green) and uncinate fascicles is shown. Note that the 2 tracts are close together at the temporal stem. Thus, tractography of uncinate fascicles drawn in advance can be used as an assistant or a guide to draw the Meyer loop. C, The T-M distance is 41 mm for presurgical tractography (arrow). D, Postsurgical tractography of Meyer loop is also achieved in this patient.
