linear accelerator


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to linear accelerator: cyclotron

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.
enlarge picture
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 ?
Velindre Cancer Centre, which treats patients from across South Wales, has seven linear accelerators on its site in Whitchurch.
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
Chapter Three Linear Accelerator Development Environmental Analysis
Acceletronics specializes in the on-site service, repair, refurbishing, remarketing and installation of linear accelerators, CT simulators and other oncology and medical imaging equipment.
A linear accelerator (linac) is a key component in radiation therapy systems used to create high-energy x-rays for cancer treatments.
This technology, which exceeds any capabilities currently available in the state, will replace EIRMC's existing linear accelerator that has served over 3000 patients since 2001.
When it comes to the cost of linear accelerator, linac, Klystron, Thyratron and Magnetron parts, no one can beat RadParts.
Elekta Synergy is an advanced digital linear accelerator that integrates a suite of imaging tools to enable high quality, 3D imaging from the treatment control console at the time of treatment.
The subject of procurement is the supply of instrumentation (equipment) - radiotherapeutic irradiator - Linear Accelerator category "True Beam", including accessories, transport, customs, installation, assembly, commissioning, trial operation, providing necessary documentation to perform the appropriate tests and trials, operator training, documentation is delivered to the device, dismantling and disposal obmenovaneho devices, if necessary project documentation and then perform the necessary structural modifications of existing premises irradiation facilities for installation accelerators.
Every Linear Accelerator or CT Simulator we install, every relocation we perform, every refurbishment we complete, every service call we respond to and every part we deliver helps our customers," said Steve Schwarz, president of Acceletronics.
In he same energy and water development appropriations bill that killed the SSC, Congress allocated $25 million for the Fermilab modification and approved the expenditure of $36 million to start work on the B Factory at the Stanford Linear Accelerator Center (SN: 10/16/93, p.
The delivery is also for every linear accelerator system for in vivo dosimetry, dosimetry daily tests and dosimetry system for verifying irradiation plans IMRT and VMAT.