Fig 1. This is the Perfection Model (Elekta) of the Gamma Knife. There
is no pain or noise during treatment for trigeminal neuralgia. The
patient lies on the couch.
Fig 2. At the time of the Gamma Knife radiosurgery, the physician choose the location on the trigeminal nerve where the radiation will be given. The arrow points to this place on the trigemnial nerve, which is near the brain.
Fig 3. Seven months after the Gamma Knife radiosurgery, an area is seen in the right trigeminal nerve as a white oval, which is precisely where the treatment was given. This white area represents an uptake of dye that is injected into the vein (in the arm) at the time of the magnetic resonance imaging (MRI). Such a follow up MRI is not routinely done.