title: Halo ring supporting the Brown-Roberts-Wells stereotactic frame for fractionated radiotherapy.
abstract: The authors describe a new instrumentation for repositioning of the Brown-Roberts-Wells (BRW) stereotaxic system, useful for precise fractionated radiotherapy. A lucite ring is fixed to the patient's skull with four screws. Another ring, partially open, is then firmly connected co-axially to the lower part of the first one with four spacer-bars. The fixture permits an exact repositioning of the B.R.W. stereotaxic system, placing the target point in the linear accelerator isocenter. The preliminary technical results obtained in five children are reported and the fixture performance, advantages, and perspectives are discussed.
authors.affiliation: Department of Neurosurgery, "G. Gaslini" Research Children's Hospital, Genoa, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Carini
authors.forename: G
authors.initials: G
authors.lastname: Scielzo
authors.forename: F
authors.initials: F
authors.lastname: Grillo Ruggieri
authors.forename: F
authors.initials: F
authors.lastname: Bistolfi
authors.forename: M
authors.initials: M
authors.lastname: Ravegnani
authors.forename: L
authors.initials: L
authors.lastname: Andreussi
mesh_terms: D001932:Brain Neoplasms / Q000601:surgery*; D004867:Equipment Design; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000601:surgery*; D016634:Radiosurgery / Q000295:instrumentation*; D013238:Stereotaxic Techniques / Q000295:instrumentation*