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Radiotherapy equipment grating

A technology for radiotherapy and equipment, applied in the field of gratings of radiotherapy equipment, can solve the problems of negative impact on healthy tissue, leakage of grating blades, etc., and achieve the effect of reducing leakage rate and improving safety.

Active Publication Date: 2013-06-05
SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are gaps between adjacent blades, so there must be leakage of radiation. The current solution is that the longitudinal projection lines of the gaps between the blades converge upwards and intersect at one point, and the intersection point is set below the radiation source. The rays emitted by the radiation source are not at the same focus as these gaps, so the rays will hit the side wall of the blade to reduce leakage. Since the radiation source has a certain diameter, it is not a real point source, and the distance between adjacent blades The direction of the slit is consistent, so the grating blades of this structure still have leakage, which has a negative impact on healthy tissue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The radiotherapy equipment grating of the present invention is applied to a radiotherapy equipment grating device, such as figure 2 , image 3 As shown, the grating of the radiotherapy equipment includes two groups of grating blades arranged oppositely, the grating blades have a length dimension in the horizontal direction, a width dimension in the horizontal direction and a thickness dimension in the vertical direction, and each group of grating blades includes at least 3 Unit 1, each unit 1 includes at least 3 grating blades, the upward extension lines of the envelope lines of the longitudinal projections of the two outermost sides of each grating blade intersect to form an acute angle, and the intersection point (such as figure 2 Point a, point b1, point b2, point c1) are located below the radiation source of the radiotherapy equipment, and the intersection points formed by each set of grating blades do not coincide. The intersection points in this embodiment are ...

Embodiment 2

[0030] Such as Figure 4 with Figure 5 As shown, the rest is the same as that of Embodiment 1, except that the longitudinal projections of the adjacent surfaces of the grating blades are broken lines that slide, fit and match each other. In this embodiment, the middle blade 11 and the auxiliary blade are Z-shaped, and the shape of the middle blade in the middle is an inverted convex shape. This embodiment is the same as Embodiment 1, except that the middle blade in the middle is an inverted convex shape, and the remaining grating blades have only two shapes and specifications, which reduces the processing cost.

Embodiment 3

[0032] The rest is the same as that of Embodiment 1, except that the longitudinal projections of the adjacent surfaces of the grating blades are curves that slide, fit and match each other.

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PUM

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Abstract

The invention discloses a radiotherapy equipment grating which comprises two groups of oppositely arranged grating blades, wherein each grating blade has a horizontal length dimension, a horizontal width dimension and a vertical thickness dimension, each group of grating blade comprises at least three units, each unit at least comprises three grating blades, extension cords in the envelop line direction of the longitudinal projections on two lateral surfaces on the outmost side of each unit of grating blade are intersected to form an acute angle, the intersection point is arranged under a radioactive source of radiotherapy equipment, and the intersected points formed by each group of grating blades are not intersected. Fly gaps between adjacent blades are not consistent in the large range, and the fly gaps between the blades of each unit do not point to the same direction, so that radiation leakage rate is greatly reduced, and safety of therapy is improved.

Description

technical field [0001] The invention relates to a medical device, in particular to a grating for a radiotherapy device. Background technique [0002] When radiotherapy equipment is performing radiotherapy on patients, it is necessary to control the dose of treatment and the range of radiation exposure in order to achieve the best therapeutic effect and minimize the damage to healthy tissues. Therefore, the latest radiotherapy equipment is located at the radiation head That is, the accelerator is equipped with a grating that can adjust the ray passing area. The grating has a through hole that can be adjusted in size and shape. The ray passes through the through hole to precisely irradiate the lesion to avoid damage to normal tissues. [0003] The raster device of radiation therapy equipment is an accessory of a linear accelerator dedicated to radiation tumors. It is used to limit the radiation area to protect other important tissues from radiation, thus replacing the traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/00
Inventor 姚毅
Owner SUZHOU LINATECH MEDICAL SCI & TECH CO LTD