gamma knife
A stereotactic radiosurgery device that delivers highly focused radiation beams to treat brain tumors and other intracranial lesions.
Full Definition
Gamma Knife is a specialized stereotactic radiosurgery system that uses multiple intersecting beams of gamma radiation from cobalt-60 sources to deliver precise, high-dose radiation to intracranial targets. The system enables single-session treatment of brain tumors, arteriovenous malformations, and functional disorders while sparing surrounding healthy tissue. In neurosurgical oncology, Gamma Knife is particularly effective for small metastases, residual tumor tissue after resection, and recurrent disease. Treatment planning involves detailed imaging and dosimetric calculations to optimize tumor coverage while minimizing radiation to critical structures.
Usage
Usage note: Capitalize as a proprietary treatment modality; distinguish from generic radiosurgery.
In Context
- "The patient underwent Gamma Knife radiosurgery for multiple brain metastases." — radiation oncology note
- "Gamma Knife treatment achieved excellent local control of the residual tumor." — follow-up imaging report