Radiation therapy apparatus having retractable beam stopper

Radiation therapy apparatus having retractable beam stopper

A translation mechanism for linearly moving a beam stopper in radiation therapy apparatus includes first and second arms pivotally mounted to a support and third and fourth arms pivotally mounted to the first and second arms. The third and fourth arms are attached to the beam stopper and can compris...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: COAD, GEORGE L
Format: Patent
Sprache:eng
Schlagworte:
ELECTROTHERAPY
GAMMA RAY OR X-RAY MICROSCOPES
HUMAN NECESSITIES
HYGIENE
IRRADIATION DEVICES
MAGNETOTHERAPY
MEDICAL OR VETERINARY SCIENCE
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
RADIATION THERAPY
TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR
ULTRASOUND THERAPY
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Beschreibung
Zusammenfassung:A translation mechanism for linearly moving a beam stopper in radiation therapy apparatus includes first and second arms pivotally mounted to a support and third and fourth arms pivotally mounted to the first and second arms. The third and fourth arms are attached to the beam stopper and can comprise part of the beam stopper. In one embodiment, the third and fourth arms include disc shaped portions stacked in axial alignment with a drive motor attached to one disc portion ahd having a drive shaft axially aligned with and coupled to the other portion whereby relative rotation of the disc portions effects linear translation of the beam stopper.