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Concave and convex blade and multi-blade grating structure with blades

A multi-leaf grating, concave-convex technology, applied in the directions of X-ray/γ-ray/particle irradiation therapy, etc., can solve the problem of small diameter requirements of the screw and nut, and achieve improved rigidity, reliability, and manufacturing difficulty. Effect

Inactive Publication Date: 2016-01-13
CHENGDU EBRIDGE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a concave-convex blade and a multi-leaf grating structure with the blade, so as to solve the problem in the prior art that the diameter of the screw and nut is very small when the blade is very thin

Method used

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  • Concave and convex blade and multi-blade grating structure with blades
  • Concave and convex blade and multi-blade grating structure with blades
  • Concave and convex blade and multi-blade grating structure with blades

Examples

Experimental program
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Effect test

Embodiment 1

[0023] like Figure 1 to Figure 3 The concave-convex blade shown includes a blade 1 . A convex curved surface 11 and a concave curved surface 12 are provided on the blade 1 . A counterbore 111 and a screw hole 112 are provided at one end of the convex curved surface 11 . The position of the convex curved surface 11 is determined by the position of the used motor, and its size is determined according to the thickness of the blade 1 in the multi-leaf collimator design and the size of the selected screw rod 22 . The position of the concave surface is determined by the position of the adjacent blade motor, and its size is determined by the thickness of the blade 1 in the multi-leaf grating design and the size of the selected screw 22, which does not reduce the overall rigidity of the blade 1 in the thickness direction . The convex curved surface and the concave curved surface are arranged in parallel, that is, there is no interference, so the convex curved surface and the concave...

Embodiment 2

[0028] like Figure 3 to Figure 5 The multi-leaf collimator structure of concave-convex blades shown includes mutually overlapping blades 1 and a driving mechanism connected to the blades 1. The driving mechanism includes a driving device 21, a screw 22 and a nut 23. The described The two ends of the screw rod 22 are respectively connected to the driving device 21 and the nut 23. The blade 1 is provided with a convex curved surface 11 and a concave curved surface 12 matching the convex curved surface 11 of the adjacent blade 1. A counterbore 111 for fixing the nut 23 and a screw hole 112 for adapting to the screw rod 22 are provided on the convex curved surface 11 . The convex curved surface 11 is provided with a screw hole adapted to the shape of the screw, which enables the screw to expand and contract in the screw hole without interference with the blades. Setting the nut counterbore and screw hole on the convex surface can effectively increase the thickness and strength o...

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Abstract

The invention discloses a concave and convex blade and a multi-blade grating structure with the blades. The multi-blade grating structure comprises mutually overlapped blades and drive mechanism connected to the blades; each drive mechanism comprises a drive device, a screw rod and a nut; two ends of each screw are respectively connected to the corresponding drive device and the corresponding nut; each blade is provided with a convex curved surface and concave curved surfaces matching the convex curved surfaces of the adjacent blades; and each convex curved surface is provided with a counter bore for fixing the corresponding nut and a screw rod hole for adapting to the corresponding screw rod. The problem of a requirement that diameters of screw rods and nuts are very small when blades are very thin in the prior art is solved.

Description

technical field [0001] The invention relates to the field of tumor radiotherapy equipment, in particular to a multi-leaf grating for implementing three-dimensional conformal intensity-modulated radiation therapy for tumors and a leaf structure of the multi-leaf grating. Background technique [0002] As an important device for three-dimensional conformal intensity-modulated radiation therapy for tumors, the motorized multi-leaf grating has been widely used at home and abroad. The multi-leaf grating is composed of mutually symmetrical left and right blade groups, and the blades are made of heavy metal tungsten alloy materials that can have a strong blocking effect on radiation. When the multi-leaf collimator is in the closed state, it can effectively prevent the radiation from passing through, and in the working state, it can limit the emitted radiation within a certain range, that is, the dynamic wedge for radiotherapy can be realized by means of the movement of the leaves in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
Inventor 吕力
Owner CHENGDU EBRIDGE TECH