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For shortening irradiation treatment time and avoiding hot and cold points in target volume, it is verynecessary to enlarge the sharp Bragg peak of heavy ion beams to a suitable extent so as to treat solid tumor.Two kinds of range modulators could realize
For shortening irradiation treatment time and avoiding hot and cold points in target volume, it is very necessary to to enlarge the sharp Bragg peak of heavy ion beams to a suitable extent so as to treat solid tumor. Two kinds of range modulators could realize