New stereotactic X-ray knife
For many years, the irradiation of small volumes of tissue in the brain to necrotizing doses has been investigated as a non-invasive alternative to neurosurgery. We propose a new system in which a precisely machined helmet serves as a multi-port focussed X-ray collimator when it is itself irradiated by a conventional medical linear accelerator run in the electron mode. When the collimator is attached to a stereotactic frame, the geometric accuracy of delivering small radiation fields to the brain is limited primarily by the accuracy of the stereotactic localization, and is relatively independent of the positional stability of the accelerator. Field sizes as small as two millimeters are readily achievable. The problem of low dose rate associated with these small fields is overcome by the use of high electron beam currents.
- Research Organization:
- New York Univ. Medical Center, NY (USA)
- OSTI ID:
- 6840546
- Journal Information:
- Int. J. Radiat. Oncol., Biol. Phys.; (United States), Vol. 14:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BRAIN
NEOPLASMS
COLLIMATORS
DESIGN
RADIOTHERAPY
ELECTRON BEAMS
FILM DOSIMETRY
LINEAR ACCELERATORS
RADIATION DOSES
X RADIATION
ACCELERATORS
BEAMS
BODY
CENTRAL NERVOUS SYSTEM
DISEASES
DOSES
DOSIMETRY
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
LEPTON BEAMS
MEDICINE
NERVOUS SYSTEM
NUCLEAR MEDICINE
ORGANS
PARTICLE BEAMS
RADIATIONS
RADIOLOGY
THERAPY
550603* - Medicine- External Radiation in Therapy- (1980-)