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Encyclopedia > Gamma knife

In medicine, Leksell Gamma Knife is a neurosurgical device used to treat brain tumors. It was invented by Lars Leksell, a Swedish neurosurgeon, in 1967 at the Karolinska Institute in Sweden. Insertion of an electrode during neurosurgery for Parkinsons disease. ... A brain tumour is any intracranial tumor created by abnormal and uncontrolled cell division, normally either found in the brain itself (neurons, glial cells (astrocytes, oligodendrocytes, ependymal cells), lymphatic tissue, blood vessels), in the cranial nerves (myelin-producing Schwann cells), in the brain envelopes (meninges), skull, pituitary and pineal gland... Lars Leksell (1907-1986) was a Swedish physician and Professor of Neurosurgery at the Karolinska Institute in Stockholm, Sweden. ...


The Leksell Gamma Knife unit contains 201 cobalt-60 sources of approximately 30 curies (1.1 TBq) each, placed in a circular array in a heavily shielded assembly. The unit directs gamma radiation to a target point through a procedure in which the patient wears a specialized helmet on their head to direct the radiation. Such target points selected in the brain can be placed at the center of the radiation focus, allowing a tumoricidal radiation dosage to be delivered in one treatment session. The Gamma Knife has proved effective for thousands of patients with benign or malignant brain tumors, vascular malformations such as an arteriovenous malformation or avm for short, pain or other functional problems. Cobalt 60 is a Front 242 side project featuring Front 242s Jean-Luc de Meyer and Dominique Lallement. ... The curie (symbol Ci) is a former unit of radioactivity, defined as 3. ... The becquerel (symbol Bq) is the SI derived unit of radioactivity, defined as the activity of a quantity of radioactive material in which one nucleus decays per second. ... This article is about electromagnetic radiation. ... Benign can refer to any medical condition which, untreated or with symptomatic therapy, will not become life-threatening. ... In medicine, malignant is a clinical term that is used to describe a clinical course that progresses rapidly to death. ... Vascular is an adjective for the word vessel and refers to tube-like structures. ... Arteriovenous malformation or AVM is a congenital disorder of the veins and arteries that make up the vascular system . ... Look up Pain in Wiktionary, the free dictionary. ...


The procedure is less invasive than alternative surgeries like Micro-decompression for neurological disorders. In the case of treatment for Trigeminal neuralgia the procedure may be used repeatedly on patients. The term invasive in Medicine has two meanings: A medical procedure which penetrates or breaks the skin or a body cavity, i. ... Trigeminal neuralgia, or Tic Douloureux, is a neuropathic disorder of the trigeminal nerve that causes episodes of intense pain in the eyes, lips, nose, scalp, forehead, and jaw. ...



Ultimately, consideration for Gamma Knife treatment is contingent upon the patient's diagnosis, medical history and the case's overall severity upon consultation. In some instances, neurosurgeons will consider treatment for patients with metastatic disease, the elderly and whose life span will not exceed fifteen years, as well as those with inoperable lesions.


The risks of Gamma Knife treatment include but are not limited to radiation necrosis, secondary malignancy caused by the radiation (ie: formation of tumor), hemorrhage, infection from the placement of the stereotactic headframe, paralysis and death.

Contents

How It Works

The Leskell Gamma KnifeĀ® Perfexion emits finely focused beams of gamma radiation with minimal effect on surrounding normal tissue and without the usual risks of surgery or an incision. Gamma Knife surgery maximizes patient comfort and can be used to treat lesions that before were either inaccessible or were treated unsuccessfully by conventional surgery, chemotherapy and/or radiation therapy.


Image:CrossSection2.jpg Image File history File links CrossSection2. ...


Present Day Business

Elekta, maker of the Leksell Gamma Knife, is currently the second largest supplier of radiotherapy equipment in the world, and the market leader in Europe. The Leksell Gamma Knife remains the gold standard for stereotactic neurosurgery against which all other systems are compared. The new Elekta Leksell Gamma Knife Perfexion system increases the available treatment volume, allowing many more sites of treatment. Elekta, is a Swedish medical systems company founded by Lars Leksell, supplying neurosurgery, radiosurgery, radiotherapy, and magneto-encephalography equipment. ... Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis). ... Stereotactic surgery or stereotaxy is a minimally-invasive form of surgical intervention which makes use of a three-dimensional coordinates system to locate small targets inside the body and to perform on them some action such as ablation (removal), biopsy, lesion, injection, stimulation, implantation, etc. ... Insertion of an electrode during neurosurgery for Parkinsons disease. ... Elekta, is a Swedish medical systems company founded by Lars Leksell, supplying neurosurgery, radiosurgery, radiotherapy, and magneto-encephalography equipment. ...


See also

Clinac 2100 C100 accelerator Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis). ... Stereotactic surgery or stereotaxy is a minimally-invasive form of surgical intervention which makes use of a three-dimensional coordinates system to locate small targets inside the body and to perform on them some action such as ablation (removal), biopsy, lesion, injection, stimulation, implantation, etc. ...

External links

  • How Gamma Knife Works (Video)
  • Gamma Knife Center - Florida Hospital

  Results from FactBites:
 
Gamma Knife (501 words)
Sometimes the Gamma Knife is used along with conventional surgery or as a boost in traditional radiotherapy.
The Gamma Knife is not an experimental procedure.
The Gamma Knife was brought to Western New York largely through the efforts of the Director of Buffalo Neurosurgery Group, Douglas B. Moreland, MD in cooperation with Roswell Park Cancer Institute and other area physicians.
Washington University Neurosurgery: Gamma Knife (670 words)
Gamma Knife radiosurgery is an alternative procedure useful in treating either single or multiple brain metastases with diameters of approximately 3 cm or less.
Gamma Knife radiosurgery may be useful in the treatment of benign intracranial tumors such as acoustic schwannomas, small peripherally based meningiomas, or pituitary adenomas.
Gamma Knife radiosurgery is useful as an alternative to resection of acoustic schwannomas (vestibular schwannomas).
  More results at FactBites »

 
 

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