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:
Mar. 31, 2015
Filed:
Oct. 01, 2010
Kevin Brown, Horsham, GB;
Adrian Maxwell Smith, London, GB;
Kevin Brown, Horsham, GB;
Adrian Maxwell Smith, London, GB;
Elekta AB (publ), Stockholm, SE;
Abstract
The ability to provide a fine resolution variation in the dose rate of radiotherapeutic apparatus would allow delivery times of Volumetric Modulated Arc Therapy (VMAT) and related techniques to be reduced significantly. A radiotherapeutic apparatus is described, comprising a source of radiation able to issue pulses of radiation at a base frequency, and a control apparatus arranged to permit pulses provided these match a pulse pattern chosen to achieve a selected time-averaged power level, the chosen pulse pattern being one selected from a plurality of pulse patterns that include patterns consisting of trains of pulses that include, relative to the base frequency, at least every nth and every mpulse where n≠m and the nand mpulses are non-coincident. Essentially, such an apparatus issues a pulse if it is the nth or the mor the k(etc) where n, m, k . . . are selectable independently.