Broad beam three‐dimensional irradiation for proton radiotherapy

Abstract
A three-dimensional irradiation system using scatterers for lateral spreading is proposed. This system, which is applicable to proton beams, is easily achieved by ordinary techniques using a movable multileaf collimator, a variable thickness water column, and a computer for their control. Target volumes of convex shape can be irradiated in a three-dimensional way by this method.
Funding Information
  • Cancer Research Project I of the Ministry of Education and Cancer Research Aid of the Ministry of Health and Welfare

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