Magnetic resonance angiography with 3D rendering and silicon-computed tomography angiography of the petrosquamosal fissure.

<p>Upper row: Maximum Intensity Projection of axial magnetic resonance angiography partitions (slab at the occipito-cerebellar border <b>(B)</b> mid-sagittal T2w slice used as a reference,) and 3D rendering of silicon-enhanced computed tomography angiography as seen from <b>(C)</b> inside and <b>(D)</b> outside of the skull. <b>(E)</b>, <b>(F)</b>, <b>(G)</b> Lower row: Axial computed tomography slices in caudo-cranial sequence showing the exit from the brain of most of the transverse sinus blood through the petrosquamosal fissure (arrows), then joining the external jugular system.