Varian Medical Systems, Inc.

Robert Kopels

Stanley Mansfield

Magdalena Constantin

HsinLu Hsu

Stan Mansfield

Ulrich Martin Graf

Jonathan Evans

A multileaf collimator assembly employs one or more static blocks to significantly reduce extra focal leakage or out of field dose. The multileaf collimator assembly includes a plurality of pairs of beam shaping leaves. The leaves of each pair are movable relative to each other in a longitudinal direction. The one or more static blocks are disposed adjacent to the outermost pair of beam shaping leaves and unmovable in the longitudinal direction. The material composition and geometric characteristics of the static blocks may be chosen based on the pre-determined leakage specification for a particular radiation apparatus in the patient plane.

Multileaf collimator assembly with reduced extra-focal leakage

A radiotherapy clinical treatment machine is described having a rotatable gantry and an imaging device with articulating robotic arms to provide variable positioning and clearance for radiation treatment applications. According to one aspect of the invention, a first and a second robotic arms are pivotally coupled to the rotatable gantry, allowing the robotic arms to maneuver independently from the rotatable gantry.

Imaging device for radiation treatment applications

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Cupertino, CA, United States of America

Robert Kopels