linear accelerator
Pronunciation: LIE-nack
Also written as: LINAC — Linear Accelerator
Medical device that generates and delivers high-energy X-rays or electron beams for cancer treatment.
Full Definition
A linear accelerator (LINAC) is the primary treatment machine used in external beam radiation therapy. It accelerates electrons to high energies using radiofrequency electromagnetic fields in a linear configuration. These electrons either directly treat superficial tumors or strike a target to produce high-energy X-rays (photons) for deeper tumors. Modern LINACs are equipped with multileaf collimators, electronic portal imaging devices, and computer-controlled positioning systems that enable precise dose delivery techniques such as IMRT and VMAT.
Usage
Usage note: Acronym pronunciation varies by region; spell out on first use in formal documents.
In Context
- "The patient was positioned on the linear accelerator couch for daily treatment." — Treatment record
- "The LINAC underwent daily quality assurance checks before patient treatments." — Quality assurance log