LINAC

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LINAC

Acronym of linear accelerator.
Farlex Partner Medical Dictionary © Farlex 2012

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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
In radiation therapy treatments with high energy LINAC (>10MV), the inevitable production of neutrons occurs and contributes an additional dose to the patient due to the materials used [4].
The purpose of this study was to investigate the use of constant dose rate and constant angular spacing intensity-modulated arc therapy (CDR-CAS-IMAT) with conventional linacs for postoperative patients with cervical cancer.
Using a fourth linac to its full capacity will require six additional radiographers, costing PS250,000 a year, but savings would be made by carrying out some of the work currently done at Clatterbridge on the Wirral.
Table 5 compares the data from this study with the other published calibration curves for LINAC X-rays.
At a time when there is a significant emphasis being placed on fiscal prioritization at hospitals and clinics around the world, Brainlab is helping to provide doctors and administrators with flexible configurations for new or existing LINAC technology that offer the precision and automation of ExacTrac, said Stefan Vilsmeier, President and CEO, Brainlab.
IORT with electrons delivered by conventional Linacs, immediately after a wide local excision, presented the expected results until now, with very good local control and cosmetic outcomes and a low toxicity rate.
They are offered as standard equipment by nearly all linear accelerator (LINAC) vendors as both field verification and quality assurance (QA) tools.
The latest linacs can deliver higher doses of radiation over shorter treatment courses, and are incredibly complicated machines that use a host of different technologies.
The Assembly Government has approved pounds 8.87m for phase one of the site improvement project for Velindre, includes a linac, two linac bunkers and a replacement linac.
In his research paper 'Wake field Suppression in High Gradient Linacs for Lepton Linear Colliders', accelerator physicist Professor Roger Jones examines research into the suppression of these wake fields.
The proposal to create two satellite sites with linear accelerators (linacs) has been put forward by the Merseyside and Cheshire Cancer Network.
The Welsh Assembly Government funding will help replace two linear accelerators (Linacs) and a CT simulator.