The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2018
Filed:
Sep. 18, 2015
Varian Medical Systems, Inc., Palo Alto, CA (US);
Magdalena Constantin, Los Altos, CA (US);
HsinLu Hsu, Sunnyvale, CA (US);
Jonathan Evans, Mountain View, CA (US);
Robert Kopels, Cupertino, CA (US);
Varian Medical Systems, Inc., Palo Alto, CA (US);
Abstract
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.