CN212941032U - Multi-leaf collimator leaf combination for tumor radiotherapy - Google Patents

Abstract

The utility model discloses a multi-blade collimator blade combination for tumor radiotherapy, the types of the blades are two, the front ends of the blades are provided with a front section and a back section, one blade is arranged in front of the upper section of the front end, the other blade is arranged in front of the lower section of the front end, two different blades are arranged oppositely, and the front ends of the blades can be embedded and closed in a complementary way; both vanes are Z-shaped structures with the upper parts and the lower parts offset with each other. The utility model can effectively solve the problem of radiation leakage between the blades and at the blade ends in the multi-blade collimator radiotherapy.

Description

Multi-leaf collimator leaf combination for tumor radiotherapy

Technical Field

The utility model relates to a tumour radiotherapy field, the multi-leaf collimator of use in the middle of concretely relates to tumour radiotherapy.

Background

In the field of current radiotherapy, the multi-leaf collimator is widely applied at home and abroad as an important device for tumor radiotherapy. The multi-leaf collimator has a plurality of pairs of leaves, each leaf is made of heavy metal capable of blocking high-energy rays, and when tumor radiotherapy is carried out, the leaves of the multi-leaf collimator need to be controlled to form holes matched with the shape of a tumor, so that the effects of killing the tumor and protecting surrounding normal tissues are achieved.

In current application, multi-leaf collimator blade front end is mostly the arc terminal surface, because of current blade control technology's limitation, can not make to form and shine the hole outside every to the blade front end closed completely to cause the hourglass of blade end to penetrate. How to effectively reduce or eliminate the inter-leaf radiation leakage caused by the movement gaps existing among the leaves of the multi-leaf collimator is a problem which needs to be solved by engineers.

Disclosure of Invention

The utility model aims at providing a can effectively solve the hourglass problem of penetrating between multi-leaf collimator blade end and blade, and then improve tumour treatment efficiency's multi-leaf collimator blade combination.

In order to realize the purpose, the utility model adopts the technical proposal that: a multi-blade collimator blade combination for tumor radiotherapy is characterized by comprising two blades, wherein the front ends of the two blades are provided with a front section and a back section, one blade is arranged in front of the upper section of the front end, the other blade is arranged in front of the lower section of the front end, the two blades are oppositely arranged, and the front ends of the two blades can be complementarily embedded; the two types of blades are integrally Z-shaped structures with mutually offset upper parts and lower parts, and the distance between the central axes of the upper parts and the lower parts of the two types of blades is half of the width of the blades.

After the technical scheme is adopted, the positions of the front section and the rear section of the front end of each pair of oppositely arranged blade groups are complementary, so that the problem of radiation leakage between the blade ends outside the irradiation hole can be effectively solved; the whole blade adopts the Z-shaped structure arrangement which is vertically offset along the beam direction, so that the high-energy beam can be effectively prevented from penetrating through the blade gap.

Drawings

Fig. 1 is the overall schematic view of the blade assembly layout of the present invention.

Fig. 2 is a schematic side view of the blade assembly of the present invention.

Fig. 3 is the same side blade arrangement diagram of the present invention.

Detailed Description

As shown in fig. 2, it includes a blade 201 and a blade 202, where 203 and 204 are two sections of the front end of the blade 201, and 205 and 206 are two sections of the front end of the blade 202. When the pair of blade assemblies 201 and 202 shown in fig. 2 are used as blade assemblies outside the beam hole, the relative operation of the blades 201 and 202 is controlled, the sections 203 and 205 and the sections 204 and 206 are as close as possible without collision, and the sections 203 and 206 are partially overlapped, so that the two blades form a region for blocking the beam at the blade end at the overlapped part. As shown in FIG. 3, the whole blade is in a Z-shaped structure with the upper part and the lower part offset from each other, and the contact surface of the upper half part between the blades is almost coincident with the axial plane of the lower half part of the blade, so that the beam can be blocked by one lower half part of the blade after entering the gap between the upper half part of two adjacent blades, and thus, the beam leakage between the blades can be effectively reduced or even eliminated.

Claims (2)

1. A multi-blade collimator blade combination for tumor radiotherapy is characterized by comprising two blades, wherein the front ends of the two blades are provided with a front section and a back section, one blade is arranged in front of the upper section of the front end, the other blade is arranged in front of the lower section of the front end, the two blades are arranged oppositely, and the front ends of the two blades can be mutually embedded; the two blades are integrally Z-shaped structures with the upper parts and the lower parts mutually offset.

2. The multi-leaf collimator leaf combination for tumor radiotherapy of claim 1, wherein the axial distance between the upper and lower parts of the two leaves is half of the width of the leaf.

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