linear accelerator


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lin·e·ar ac·cel·er·a·tor (LINAC),

a device imparting high velocity and energy to atomic and subatomic particles; an important device for radiation therapy.

linear accelerator (LINAC)

Etymology: L, linea, line, accelerare, to quicken
an apparatus for accelerating charged subatomic particles, used in radiotherapy, physics research, and the production of radionuclides. A pulsed electron beam generated by an electron gun passes through a long, straight vacuum tube containing alternating hollow electrodes. The electrodes are arranged so that, when their high-frequency potentials are properly varied, the electrons passing through the tube receive successive increments of energy. The electrons are stopped abruptly by a heavy metal target at the end of the tube and directed by a collimator to deliver supervoltage x-rays to the patient receiving radiotherapy.
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Linear accelerator

linear accelerator

A device that accelerates radioactive particles and beams to body regions affected by malignancy, while minimising damage to normal tissue. Linear accelerators use electrodes and gaps arranged in a straight line, proportioned so when electrical potentials are varied with the proper amplitude and frequency, particles passing through the waveguide receive successive increments of energy, and are therefore accelerated; the device delivers therapeutic radiation in the range of 4 to 25 million volts, as either intense radiation or high-energy electron beams—most commonly, 60Co, delivering 2–10 Gy/min (200–1,000 rads/min) at the centre of an internal malignancy. 

Types
External beam radiation therapy, stereotactic body radiotherapy, stereotactic radiosurgery.

Indications
Head and neck cancer, prostate cancer, Hodgkin lymphoma and other lymphoproliferative malignancies, seminomas and localised breast cancer, in combination with an excision of malignant lumps.

lin·e·ar ac·cel·er·a·tor

(lin'ē-ăr ak-sel'ĕr-ā-tŏr)
A device imparting high velocity and energy to atomic and subatomic particles; an important device for radiation therapy.

linear accelerator

A machine that uses high voltages to accelerate particles so that they can be used in RADIOTHERAPY.
References in periodicals archive ?
Since PSII requires the target surface to fit inside the linear accelerator, it requires a much larger (physically) accelerator.
Table 12: World Recent Past, Current & Future Analysis for Linear Accelerator by Geographic Region - United States, Canada, Japan, Europe, Asia-Pacific and Latin American Markets Independently Analyzed with Annual Sales Figures in US$ Million for Years 2000 through 2010 (includes corresponding Graph/Chart) II-82
Acceletronics specializes in the on-site service, repair, refurbishing, remarketing and installation of linear accelerators, CT simulators and other oncology and medical imaging equipment.
This deal reportedly begins to address the shortage of linear accelerators (linacs) in the UK and the replacement of aging linacs.
This acquisition will also expand TomoTherapy's competency in design and manufacturing of linear accelerators which is expected to improve HioArt system reliability and positively impact margins.
The centre is getting a state-of-the-art linear accelerator that will provide Island cancer patients with more advanced treatment known as TrueBeam along with space to operate it at an approximate capital cost of $10 million.
This position is very important to the company's ability to meet their promise to their customers that they will be on call and ready whenever they need linear accelerator parts.
13 May 2011 - US medical devices maker Varian Medical Systems (NYSE: VAR) said yesterday that European cancer experts have reported on developments of some promising radiosurgical techniques for treating lung and liver cancer using the company's new linear accelerator technology with high dose rate radiosurgery by using RapidArc radiotherapy on Varian's TrueBeam platform.
Elekta (STO:EKTAB), world-leading provider of radiation therapy and radiosurgery solutions, is pleased to announce that the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) has joined other world-class physics standards centers with its order of an Elekta linear accelerator.
com)-- RadParts is excited to announce their October specials to help their customers save even more on the price of linear accelerator parts, while also increasing the safety and precision of patient treatment.
The competition to host the B Factory - a particle accelerator dedicated to the study of subatomic particles known as B mesons - pitted the Stanford Linear Accelerator Center (SLAC) against Cornell University.
1)High end linear accelerator with dual energy and various electron energies for volumetric IMRT, SBRT and SRS/SRT with un-flattened beam and image guidance (including minor room modification)