Adjustable collimator, treatment head and radiotherapy equipment

Abstract

The invention provides an adjustable collimator (20), a treatment head (10,10') and radiotherapy equipment (100). The adjustable collimator (20) comprises a first body (21) and at least two collimating hole sets (22,23,24) which are arranged on the first body (21), wherein each collimating hole set (22,23,24) comprises at least two first collimating holes (211) which penetrate through two opposite sides of the first body (21). The axes of the first collimating holes (211) of the same collimating hole set (22,23,24) are focused to the same focusing point at one side of the first body (21). The axes of the first collimating holes (211) of different collimating hole sets (22,23,24) are focused to different focusing points (a,b,c) at one side of the first body (21). Furthermore distances (d1,d2,d3) of different focusing points (a,b,c) to the first body (21) are different. The adjustable collimator (20) is applied for radiotherapy and settles a problem of incapability of being simultaneously applied in head treatment and body treatment by the existing treatment head (10,10').

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an adjustable collimator, a treatment head and radiotherapy equipment. Background technique [0002] Radiation therapy is a treatment method that emits rays through a radiation source, focuses the rays on the same focus, makes the focus correspond to the position of the human tumor or other lesions, and kills the tumor through the rays to achieve non-invasive treatment. [0003] Existing radiotherapy equipment 100 such as figure 1 As shown, it includes a rotating frame (not shown in the figure) and a treatment head 10. The treatment head 10 is installed on the rotating frame and can rotate in a circle on the rotating frame. Such as figure 2 Shown is a cross-sectional view of the treatment head 10, the treatment head 10 includes a radiation source 1 and a collimator 2, figure 2 Taking the treatment head 10 including four radiation sources 1 as an example, four col...

AI Technical Summary

Problems solved by technology

[0005] Radiation therapy for head tumors requires a high dose rate of radiation, and the dose rate of radiation is inversely proportional to the square of the distance from the focal point to the radiation source. The treatment space of the head radiotherapy equipment is small, which can only meet the needs of the head radiotherapy equipment and cannot be used for body tumor radiotherapy

Conversely, the radiation therapy for body tumors requires the treatment space of the radiotherapy equipment to be large enough, so the distance between the focal point and the treatment head is relatively large, and the collimation aperture is relatively large, while tumors in the head are often small, and small apertures are required for treatment. The collimation hole of the head tumor radiotherapy equipment, if the small-aperture collimation hole of the head radiotherapy equipment is used on the body tumor radiotherapy equipment, the radiation output dose rate will be greatly reduced, which cannot meet the requirements of the head tumor treatment. Therefore, the existing body tumor Radiation therapy equipment for tumors cannot be used for radiation therapy of head tumors

That is, the existing tumor radiotherapy equipment cannot be used for head treatment and body treatment at the same time

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