title: Consequences to the patient in the event of hydraulic unit failure.
abstract: An anomalous hot spot, which occurs when the motion of the Leksell Gamma Unit is halted, was investigated. A series of measurements indicated that the source of this hot spot is the focusing property of the primary collimator. It was determined that this effect is unlikely to result in serious consequences to the patient, even in the event of failure of the hydraulic unit.
authors.affiliation: University of California, San Francisco.
authors.forename: V
authors.initials: V
authors.lastname: Smith
authors.forename: L
authors.initials: L
authors.lastname: Verhey
authors.forename: E
authors.initials: E
authors.lastname: Jones
authors.forename: J
authors.initials: J
authors.lastname: Lyman
mesh_terms: D004868:Equipment Failure; D005373:Film Dosimetry / Q000295:instrumentation*; D006260:Head Protective Devices; D006801:Humans; D008953:Models, Anatomic; D011832:Radiation Injuries / Q000209:etiology*; D016634:Radiosurgery / Q000295:instrumentation*