Fig. 17

A 25-year-old man referred to MRI due to headaches. On axial FLAIR images, there is suspicious hyperintensity in the medial temporal lobes without atrophy or mass effect (black arrows). The abnormality was not enhancing and was not clearly seen on sagittal T2 weighted images. By using a wider window, repetitive ghosting is seen outside the anatomy along the phase encoding direction, compatible with pulsation artifact