Fig. 5

Preoperative MR imaging. Conventional MRI showed a lesion located in the left temporal lobe involving the mesial temporal structures with no contrast enhancement (a–c). The reconstructed optic radiation was rostral to the lesion, and Meyer’s loop was closely involved in the lesion (d, e orange, dorsal bundle; brown, Meyer’s loop). The 3D relationship between the lesion and the optic radiation is shown (f)