Gamma Knife surgery is often referred to as Stereotactic radiosurgery (SRS), It is an unmatched non-invasive method for treating brain disorders. Single, high dose of accurate radiation to a small and critically located intra-cranial volume through the intact skull. Today, Gamma Knife surgery is performed in hundreds of leading hospitals and clinics around the world. Around half a million people have been treated with Gamma Knife surgery and more than 50,000 patients undergo Gamma Knife surgery every year. This is one procedure that has an impressive scientific track record and acceptance that no other non-invasive treatment method so has been able to achieve.
Despite the name, there is no blade or knife – it’s called Gamma Knife because radiosurgery (one-session treatment) has such a dramatic and precise effect in the target zone that the changes are considered “surgical.” So there’s no incision or blood, and minimal risk of complications.Refer a Patient
Through the use of three-dimensional, computer-aided planning and the high degree of immobilization of the patient, the treatment can minimize the amount of radiation to surrounding healthy brain tissue. There are approximately 200 sources of cobalt-60 loaded within the treatment unit. Thousands of radiation beams can be generated from these sources with a level of accuracy of more than 0.5mm, about the thickness of a strand of hair. Individually, each radiation beam is too weak to damage the normal tissues it crosses on the way to the target. But when focused precisely on that target, the beams intersect and the combined radiation is sufficient to treat the targeted area.
Because Gamma Knife radiosurgery is so accurate, the full dose of radiation can be delivered during a single session, compared with multiple visits for linear accelerator (linac) treatments, which use lower doses delivered in fractions (fractionated treatment).
Stereotactic refers to precise positioning in three-dimensional space. In Gamma Knife surgery, this means a 3-D reference frame is attached to the patient’s head during the procedure. The stereotactic frame provides a 3-D reference which can be seen on the imaging equipment to provide exact coordinates for the target and totally immobilizes the patient’s head to ensure pinpoint accuracy.
Rather than dose-contributing CT scans, most neurosurgeons use a single MRI imaging scan to establish the treatment target for Gamma Knife surgery. Other linac-based systems that don’t use the head frame require constant imaging with CT scans during treatment, further contributing to excess dosage.
Gamma Knife is a neurosurgical tool designed exclusively for the treatment of brain disorders. The cost of a Gamma Knife procedure is often 25% to 30% less than traditional neurosurgery.Patients experience little discomfort, the absence of an incision eliminates the risk of hemorrhage and infection. The conditions most suitable for Gamma Knife treatment are :-
Trigeminal neuralgia is characterized by sudden bursts (paroxysms) of face pain. These bursts are often triggered by a light touch around the mouth or face or by talking, eating, or brushing one’s teeth. The pain sometimes gets worse or better for periods of weeks or months. The pain is in the areas supplied by the trigeminal nerve: the cheeks, jaw, teeth, gums, lips
Acoustic Neuroma – is a skull based nerve sheath tumor that constitutes about 6% of all primary intracranial tumors. The are usually benign and slow growing tumor
Meningiomas make up about one-fifth of all primary intracranial tumors. Meningiomas are usually slow growing. Approximately a quarter of patients with meningioma present with epilepsy. it can be used to treat selected malignant tumors that arise in or spread to the brain (primary brain tumors or metastatic tumors), benign brain tumors (meningiomas, pituitary adenomas, acoustic neuromas), blood vessel defects (arteriovenous malformations)
AVM or Arteriovenous malformation is an abnormal connection between veins and arteries, usually congenital This pathology is widely known because of its occurrence in the central nervous system, but can appear in any location.
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