Varian Medical Systems, Inc.

William A Strachan

Stanley Mansfield

Steven W Prince

Christopher Eric Brown

Stephen Mohr

David Kirk Jensen

Calvin J Huntzinger

A beam filter positioning device includes a first and a second axes operable to move a body supporting one or more collimators, one or more photon flattening filters, one or more electron foils, and field light mirror etc. The collimators may be configured to collimate radiation to define a treatment beam suitable for radiosurgery. A controller is programmed to control the servo motor of the first and second axes to accurately position the beam filters. Radiation apparatuses and systems incorporating the beam filter positioning device or assembly are also provided.

Internally mounted collimators for stereotactic radiosurgery and stereotactic radiotherapy

A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line.

Beam filter positioning device

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San Francisco, CA, United States of America

William A Strachan