linear accelerator

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Related to Linear accelerators: electron linear accelerator

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

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 ?
The linear accelerator is used to treat all parts/organs of the body.
"Two companies that run radiology centres in various countries were in Cyprus in May to discuss the possibility with the Health ministry, but the government has commissioned an expert from abroad to study how many linear accelerators are needed.
VARIAN Medical Systems and Siemens Healthcare have announced that clinicians at The Ohio State University (Ohio State), US, are now using Varian software to plan and manage radiotherapy treatments delivered on a Siemens medical linear accelerator.
RapidArc delivers a precise and efficient treatment in single or multiple arcs of the medical linear accelerator around the patient and makes it possible to deliver image-guided IMRT two to eight times faster than is possible with a conventional IMRT.
The book begins with a chapter on medical linear accelerators and ends with a chapter on tumor and normal tissue response.
Technical chapters cover medical linear accelerators, interaction properties of X-rays and electrons, dosimetry and calibration of megavoltage X-rays and electrons, and properties of X-ray and electron beams.
The changes mark the first step of long-term expansion plans which include proposals for two more linear accelerators.
The massive linear accelerators - known as linacs - which help patients fight cancer, were hoisted into place this week.
``It also provides an uninterrupted service in times of breakdown or maintenance of the other two linear accelerators. ''
``The new machine brings the total of linear accelerators up to nine,in line with our aim of having four such pieces of equipment for every million people we serve.''
VLEPP will be a pair of linear accelerators, one for electrons, one for positrons, arranged so that the particles that come out of them will collide with each other.

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