Collimation body and treatment head

Abstract

The invention discloses a collimation body and a treatment body and belongs to the field of medical devices. The collimation body comprises a base body and a shielding body. A first collimation hole is arranged in the base body. The shielding body is arranged at the outlet of the first collimation hole. A second collimation hole which coaxially communicates with the first collimation hole is arranged in the shielding body. The shielding body is made of shielding materials used for blocking radiation beams. The base body is made of materials whose intensity is smaller than the intensity of the materials of the shielding body. In this way, on one hand, the weight of the collimation body is reduce, the processing is facilitate, and the production cost is reduced, so in a rotation process of a treatment rack, it is quite easy to keep the balance ability and stability of the treatment head and adjust the relative position of the treatment head and a radiation source. On the other hand, the dosage characteristics of the shooting field of the collimation body are improved, the half image of the shooting field and leaked shooting are reduced, other normal tissues are protected against damage and treatment effects of target cancers are improved.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a collimator and a treatment head. Background technique [0002] Multi-source focused stereotactic radiotherapy is a radiotherapy technology that integrates computer technology, stereotactic technology, electrical control technology, and surgical technology. The radiation beam is focused and focused on the lesion to destroy tumor tissue. In addition, the collimator can adjust the size of the field of view and the focus size of the focused radiation beam, etc. It can be seen that the collimator plays an important role in whether the tumor tissue can be treated efficiently. Therefore, the collimator is an important component of multi-source focusing stereotactic radiotherapy equipment, and it is very necessary to provide a collimator. [0003] The prior art provides a collimator, such as attached figure 1 As shown, the collimation body 1a is made of tungsten material, and ther...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the material of the collimator 1a is tungsten material, which has high density, heavy weight, difficult processing and high production cost

Moreover, during the rotation of the treatment gantry, the collimator easily affects the balance and stability of the treatment head, and it is difficult to adjust the relative position between the collimator and the radiation source.

However, if the material of the collimator 1a is replaced with a lightweight material that is easy to process, the dose characteristics of the collimator field will be reduced, and the penumbra and leakage of the field will increase.

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