Gamma Knife- An Effective Device for the Treatment of Brain Tumor

Gamma knife (GK) is a device used for the diagnosis of brain tumor. This effective tool uses the high dose of radiation. This type of radiosurgery diagnoses a variety of structural abnormalities inside the brain. It contains 201 cobalt-60 sources of around 30 curies (1.1 TBq) each, located in a heavily shielded assembly. This particular tool points gammas radiation in the patient’s brain. During the treatment process, patient has to wear a specialized helmet that is surgically fixed to the skull so that brain tumor remains static at the target point of the rays. In this way a dose of radiation is sent through the tumor in one treatment session. The surrounding brain tissues will relatively be unaffected during this minimally-invasive treatment.     

Radiosurgery is a useful method by which the high doses of radiation are considered to kill and shrink tumors. The radiation doses are quite focused to the damaged part and will avoid damaging of healthy brain tissue. Through the gamma knife surgery, the high-intensity gamma radiation can cover one or more tumors. The GK is specially created, designed and built to treat tumors and other disorders in the brain. Here the radiation has minimal effect on intervening brain tissue and remains concentrated only at the tumor and infected cells. It is different from Cyber knife.

During the gamma knife treatment, physician focuses extremely precision cobalt radiation beam for the targeted area of tumor. These beams of radiation are focused through holes in the helmet (collimator). Though individual beams are not strong enough to damage healthy tissue so they (beams) merge at one focal point and become powerful. This treatment is very effective especially for the Trigeminal Neuralgia. The treatment procedure may consider the follow-up use of magnetic resonance imaging (MRI) and computed tomography (CT) or angiography images to assess its effectiveness.

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