Gamma knife surgery for essential trigeminal neuralgia

About the Video: Gamma Knife radiosurgery is recognized world-wide as the preferred treatment for me...

About the Video: Gamma Knife radiosurgery is recognized world-wide as the preferred treatment for me...

About the Video: Many people suffer from nerve disorders that cause them pain or severe weakness. Th...

In this three-minute video clip, viewers are introduced to Dr. William Regine, a professor of radiat...

This short video introduces viewers to Howard M. Eisenberg, MD, the RK Thompson Professor of Neurosu...

About the Video: Radiation therapy is an important part of cancer treatment. As a result of advances...

Read more: space.newscientist.com A simulation shows what the ever-changing gamma-ray sky might look...

University Hospitals Rainbow Babies

Read more: space.newscientist.com This animation shows how astronomers think light from a gamma-ray ...

A ball smashes through a brick wall. Just a simple 3D physics render. Made from a tutorial.

In enzymology, a gamma-glutamyl-gamma-aminobutyrate hydrolas...

No Knife is a band from San Diego, CA. They play an innovat...

A knife is any cutting edge or blade, handheld or otherwise,...

Under the Knife is a compilation EP by the American band Hat...

The Fire Knife is a traditional Samoan cultural implement th...

The Knife are an electro pop duo from Sweden that formed in ...

Three Uses of the Knife: On the Nature and Purpose of Drama ...

The hospital charges for all craniotomies and transsphenoidal procedures were gathered for a 4-year period from a single, non-profit hospital serving San Diego. Calif., USA. Of the individuals in this community 65% are covered by a variety of managed health care programs which have greatly discounted hospital receipts on a per diem or capitated payment basis. A total of 104 operative cases were identified. Forty-six patients (44%) were judged to have been eligible for Gamma Knife surgery. The average hospital charge for intracranial surgery on ...

OBJECTIVE: The world's first Leksell Gamma Knife PerfeXion (Elekta Instrument AB, Stockholm, Sweden) for radiosurgery of the head and neck became operational at Timone University Hospital in Marseille on July 10, 2006. To allow strict evaluation of the capabilities, advantages, disadvantages, and limitations of this new technology, patients were enrolled in a prospective, randomized trial. METHODS: In 66 working days, between July 10 and December 20, 2006, 363 patients were treated by gamma knife surgery at Timone University Hospital, Marseille...

Object The object of this study was to compare the recurrence rates of cystic craniopharyngiomas after neuroendoscopic cyst fenestration combined with Gamma Knife surgery (GKS) and after subtotal resection (STR) combined with GKS. Methods The records of 27 patients (age range 3-66 years) with cystic craniopharyngiomas that were treated surgically or neuroendoscopically before GKS between January 2000 and December 2007 were reviewed to compare recurrence rates. The patients were divided into 2 groups: Group 1 (13 patients) received the neuroendo...

Here, we describe the first reported autopsy findings following gamma knife surgery for thalamic pain. A 62-year-old man presented with thalamic pain after treatment for thalamic malignant lymphoma. He was treated with narcotic drugs, but his pain was uncontrollable. Treatment using gamma knife surgery on the pituitary gland using a maximum dose of 180 Gy, led to the control of his intractable pain with lower doses of drugs. His death was pain-free and was caused by a recurrence of the tumor, six months after gamma knife surgery. An autopsy was...

Forty-one patients with a total of 193 metastatic brain tumors were treated because of new lesions or in a few cases because of tumor regrowth. The management involved two to four treatments with Gamma Knife radiosurgery (GKRS). The overall median survival was 15 months. The local control rate of tumors was 89% for the first treatment and 93% for repeated treatments. Symptomatic radiation-induced edema appeared in only two cases (4.9%). Patients with metastatic brain tumors who developed new lesions after GKRS were treated with GKRS alone for s...

Several review articles have compared gamma unit versus linear accelerator (linac)-based radiosurgery systems, concluding that the dose gradient 'fall-off' at the margin of the target (expressed as the distance between isodoses) is very similar for both techniques as far as single isocentre treatment volumes up to 1.5 cm diameter are concerned, and that the two radiosurgical systems are, in general, comparable. 'Fine tuning' of the gamma unit can be carried out by using multiple isocentre plans, the differential use of small collimator sizes (d...

Stereotactic radiosurgery. A review of "gamma knife" and "linac knife" technology and the unit at the Wake Forest University Medical Center. Branch CL Jr, Coric D, Olds W, Eksktrand K. Department of Neurosurgery, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC 27157. PMID: 1513382 [PubMed - indexed for MEDLINE]

Using separate analytical functions describing primary dose, P0(dm,r), collimator scatter, Sc(r), and phantom scatter, TAR(d,r), an expression for absorbed dose in narrow 60Co gamma-ray beams is developed and each function is quantified: D(d,r) = P0(dm,r) Sc(r) TAR(d,r). The absorbed dose is calculated in beams as narrow as 0.2 cm in radius. Analytical and experimental results are compared using measured dose data for the Gamma Knife. Close agreement with experimental data is observed.

To allow the experimental use in rats of a Gamma Knife Radiosurgical Unit, a stereotactic device adapted from the conventional Kopf's device was developed. To control the accuracy of the coordinate system based on the De Groot's rat stereotactic atlas, experimental radiosurgical lesions were made on the left striatum. The isodose curve distribution of the 4 mm collimator was calculated with the dose planning software used in Gamma Knife and superimposed on the left striatum target. Doses of 200 Gy were administered to the left striatum in six r...

Abstract The gamma camera is a system composed mainly of a scintillation crystal and its associated electronics. It is intended to compose an image, from gamma rays emitted from an organ inside the body that had accumulated a specific compound labeled, for instance with 99mTc. The image formed gives very useful diagnostic information about the organ being investigated. The gamma knife on the other hand is a system intended for radiation therapy of tumors. Its specific advantage is that it delivers a very high radiation dose coming from about 2...

The concept of radiosurgery and its requirements are presented. Dedicated radiosurgical tools include the modified linear accelerators working with a single rotating beam and the Gamma Knife with multiple stationary radiation sources. The 201 gamma beams from the cobalt 60 sources of the Gamma Knife intersect within 0.3 mm and it is possible to align the selected target point with the focal point within a mechanical accuracy of 0.5 mm. The technical specifications of the Gamma Knife make it possible to safely produce sharply circumscribed lesio...