gamma knife radiosurgery
Non-invasive radiosurgical treatment delivering focused gamma radiation to intracranial targets with sub-millimeter precision.
Full Definition
A specialized form of stereotactic radiosurgery that uses multiple focused beams of gamma radiation to treat brain tumors, vascular malformations, and functional disorders. The Gamma Knife system delivers approximately 200 individual gamma ray beams that converge on the target lesion, providing high-dose radiation to the treatment area while minimizing exposure to surrounding healthy tissue. The procedure requires rigid head frame fixation and detailed imaging for treatment planning, offering an alternative to traditional open surgery for suitable lesions.
Usage
Usage note: Capitalize 'Gamma Knife' as it refers to the proprietary Elekta system; distinguish from other radiosurgery platforms.
In Context
- "The vestibular schwannoma was successfully treated with gamma knife radiosurgery, achieving tumor control without facial nerve deficit." — treatment planning report
- "Gamma knife radiosurgery protocols require multidisciplinary coordination between neurosurgery, radiation oncology, and medical physics." — institutional procedure