公开(公告)号：US20180021596A1

公开(公告)日：2018-01-25

申请号：US15547359

申请日：2015-01-29

Applicant: Hitachi, Ltd.

Inventor： Satoshi ARAI ,  Akihiro MIYAMOTO

IPC: A61N5/10

CPC classification number: A61N5/1045 ,  A61N5/10 ,  A61N5/1077

Abstract: This multileaf collimator is provided with multiple leaves which limit the area irradiated by a radiation beam and which are arranged in the thickness direction. Each of the leaves is provided with a protruded portion which is formed protruding towards a first surface of the leaf, a depressed portion which is formed in the second surface of the leaf and into which the protruded portion formed on another leaf is inserted, a first curved surface which is formed between the first surface of the leaf and the lateral surface of the protruded portion, and a second curved surface which is formed between the second surface of the leaf and the lateral surface of the depressed portion.