Radiation dose adjusting device

Abstract

The utility model relates to a radiation dose adjusting device. The device comprises a radioactive source, a source switch and a shielding plate device, the radioactive source is arranged above the source switch, the shielding plate device is arranged below the source switch, the shielding plate device comprises a base, a light shielding plate, a light shielding plate driving device for driving the light shielding plate to rotate and a beam outlet, and the light shielding plate and the light shielding plate driving device are arranged in the base. The beam outlet is arranged at the bottom of the base, and the shading plate is provided with a notch corresponding to the beam outlet. According to the utility model, aiming at the irradiation dose differentiation requirement in the radiation treatment process, after the collimator with the proper focal length is selected, a certain dose of irradiation treatment is carried out on the focus area of a patient through the dose adjusting device.

Description

Technical Field

[0001] The utility model relates to the medical field, in particular to a radiation dose regulating device. Background Art

[0002] Gamma Knife is a large-scale radiotherapy device that integrates stereotactic technology and radiosurgery technology, mainly used to treat craniocerebral diseases. Its treatment principle is similar to the focusing process of a magnifying glass. The radiation beams are cross-superimposed through a collimator so that the lesion area receives a high dose, while the normal tissues that each beam passes through receive a lower dose, thereby reducing the damage of radiotherapy to normal tissues. However, due to the complexity of the patient's condition, the Gamma Knife cannot use a single large dose of lethal irradiation, but requires multiple small doses of irradiation. The existing Gamma Knife can only change the focus of multiple radiation sources by switching different collimators, and cannot adjust the radiation dose. Existing similar Gamma Knife products do not yet have a dose adjustment function device.

[0003] Therefore, it is necessary to provide a new technical solution to meet the needs of dose adjustment during radiotherapy. Utility Model Content

[0004] In order to solve the above-mentioned technical problems existing in the background technology, the utility model provides a radiation dose adjustment device. According to the differentiated radiation dose requirements during radiotherapy, after selecting a collimator with a suitable focal length, a certain dose of radiation therapy is performed on the patient's lesion area through the dose adjustment device.

[0005] The technical solution of the utility model is: the utility model is a radiation dose adjustment device, which is special in that: the radiation dose adjustment device includes a radiation source, a source switch and a shielding plate device, the radiation source is arranged above the source switch, the shielding plate device is arranged below the source switch, the shielding plate device includes a base, a shielding plate, a shielding plate driving device for driving the shielding plate to rotate and a beam outlet, the shielding plate and the shielding plate driving device are arranged in the base, the beam outlet is arranged at the bottom of the base, and a notch is arranged on the shielding plate corresponding to the beam outlet.

[0006] Furthermore, the shading plate is circular, and a shading plate gear is arranged on one side. The shading plate driving device includes a shading plate driving gear and a shading plate driving motor. The driving gear is meshed with the shading plate gear, and the driving motor is connected to the driving gear.

[0007] Furthermore, the source switch includes a source switch body, a source switch body component, a source switch body driving device capable of driving the source switch body component to rotate, a collimator and a source switch body bearing. The source switch body component and the source switch body driving device are arranged in the source switch body, the collimator is arranged on the source switch body component and passes through the source switch body component, the source switch body bearing is arranged on the lower end surface of the source switch body, the bearing inner ring of the source switch body bearing is installed on the source switch body, and the source switch body component is located above the beam outlet.

[0008] Furthermore, the source switch body component is cylindrical, and an source switch body component gear is arranged on the outside. The source switch body driving device includes a source switch body driving gear and a source switch body driving motor. The source switch body driving gear is meshed with the source switch body component gear, and the source switch body driving motor is connected to the source switch body driving gear.

[0009] Furthermore, the source switch further comprises a transition gear, and the source switch body driving gear is meshed with the source switch body component gear through the transition gear.

[0010] Furthermore, the shielding plate device also includes a limit switch, and the limit switch is arranged on the base.

[0011] Furthermore, there are two limit switches, which are respectively located at an open source state position and a closed source state position on the base.

[0012] Furthermore, the shading plate material is a high-density tungsten alloy.

[0013] The utility model provides a radiation dose adjustment device, and the shield plate dose adjustment device can accurately control the radiation therapy beam dose, which can not only kill the lesion cells, but also minimize the received dose of normal tissues on the irradiation path. The source switch body driving structure is not limited to gear drive, but can also be other driving methods such as motor direct drive, worm gear, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the shielding plate device of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the source switch body of the utility model;

[0017] Figure 4 It is an application schematic diagram of the utility model;

[0018] Figure 5 It is a schematic diagram of the limit switch of the utility model in an open source state;

[0019] Figure 6It is a schematic diagram of the limit switch of the utility model in the power-off state.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Radiation source; 2. Source switch; 3. Shield device; 4. Sunshade; 5. Limit switch; 6. Sunshade drive device; 7. Beam outlet; 8. Source switch body component; 9. Collimator; 10. Source switch body bearing; 11. Source switch body drive device; 12. Transition gear; 13. Base; 14. Source switch body. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] See also Figure 1 The structure of the specific embodiment of the utility model includes a radiation source 1, a source switch 2 and a shielding device 3, wherein the radiation source 1 is arranged above the source switch 2, and the shielding device 3 is arranged below the source switch.

[0024] During treatment, according to the actual situation of the patient, the source switch 2 is turned to select different collimators. Different collimators have different source focus positions. Then the shading plate device 3 is adjusted to adjust the radiation dose.

[0025] See also Figure 2 The structure of a specific embodiment of the baffle device 3 of the utility model includes a baffle plate 4, a limit switch 5, a baffle plate driving device 6, a beam outlet 7 and a base 13. The baffle plate 4 and the baffle plate driving device 6 are arranged in the base 13, the beam outlet 7 is arranged at the bottom of the base 13, and a notch is arranged at the baffle plate corresponding to the beam outlet. The baffle plate 4 is circular, and a baffle plate gear is arranged on one side. The baffle plate driving device 6 includes a baffle plate driving gear and a baffle plate driving motor. The driving gear is meshed with the baffle plate gear, and the driving motor is connected to the driving gear. The limit switch 5 is arranged on the base 13.

[0026] The shading plate 4 plays a role in adjusting the radiation dose during the treatment process. The material is a high-density tungsten alloy, which has a good protection effect against gamma rays. The shading plate driving device 6 drives the opening and closing of the shading plate 4, which cooperates with the beam outlet 7 on the base to adjust the radiation dose.

[0027] See also Figure 3The source switch 2 plays the role of switching the collimator during the treatment process. The structure of the specific embodiment of the shielding plate device 3 of the utility model is mainly composed of a source switch body component 8, a collimator 9, a source switch body bearing 10, a source switch body driving device 11, a transition gear 12 and a source switch body 14. The source switch body component 8 and the source switch body driving device 11 are arranged in the source switch body 14, the collimator 9 is arranged on the source switch body component 8 and passes through the source switch body component 8, the source switch body bearing 10 is arranged on the lower end surface of the source switch body 14, the bearing inner ring of the source switch body bearing 10 is installed on the source switch body 14, and the source switch body component 8 is located above the beam outlet 7. The source switch body component 8 is cylindrical, and a source switch body component gear is arranged on the outside. The source switch body driving device 11 includes a source switch body driving gear and a source switch body driving motor. The source switch body driving gear is meshed with the source switch body component gear through the transition gear 12, and the source switch body driving motor is connected to the source switch body driving gear.

[0028] The source switch body driving structure is not limited to being driven by the transition gear 12, but may also be driven by other driving methods such as motor direct drive or belt drive.

[0029] See also Figure 4 The source switch body 14 is provided with an source switch body bearing 10 at the lower end surface. The inner ring of the source switch body bearing 10 is mounted on the source switch body 14, and the outer ring of the bearing is mounted on the turntable body of the gamma knife device.

[0030] See also Figure 5 , 6 There are two limit switches 5 of the utility model, which are respectively located at the open source state position and the closed source state position of the base 13. There is an action contact 15 on the outer edge of the limit switch 5. When the baffle plate 4 rotates to the two extreme positions, the limit switch 5 is triggered by the action contact 15 to stop. The dose can be adjusted by rotating the baffle plate 4 to a certain angle to block the beam outlet 7, so as to achieve the effect of dose adjustment.

[0031] When the utility model is used, the doctor formulates a treatment plan according to the patient's examination situation, and then performs irradiation treatment with the gamma knife device. During gamma knife treatment, the radiation beam of the radiation source 1 is focused and superimposed through the collimator 9 so that the lesion area obtains a high dose, while the dose received by the normal tissues passed by each beam is indeed low, thereby reducing the damage of radiotherapy to normal tissues. The treatment head constantly changes the irradiation path during treatment. According to the location of the patient's lesion, the source switch body component 8 is driven by the source switch body driving device 11, and the collimator 9 with a suitable focal length is selected, and then the baffle plate 4 is driven by the baffle plate driving device 6 to adjust the opening and closing angle of the baffle plate 4, so as to accurately control the beam dose of radiotherapy, which can not only kill the lesion cells, but also make the dose received by the normal tissues on the irradiation path in a safe state.

[0032] The content of the utility model and the technical content not specifically described in the above embodiments are the same as the prior art. The above are only specific implementation methods disclosed by the utility model, but the protection scope disclosed by the utility model is not limited thereto. The protection scope disclosed by the utility model shall be subject to the protection scope of the claims.

Claims

1. A radiation dose adjustment device, characterized in that: The radiation dose adjustment device includes a radiation source, a source switch and a shielding plate device, wherein the radiation source is arranged above the source switch, and the shielding plate device is arranged below the source switch. The shielding plate device includes a base, a shielding plate, a shielding plate driving device for driving the shielding plate to rotate, and a beam outlet, wherein the shielding plate and the shielding plate driving device are arranged in the base, and the beam outlet is arranged at the bottom of the base, and a notch is arranged on the shielding plate corresponding to the beam outlet.

2. The radiation dose adjustment device according to claim 1, characterized in that: The shading plate is circular, and a shading plate gear is arranged on one side. The shading plate driving device comprises a shading plate driving gear and a shading plate driving motor. The driving gear is meshed with the shading plate gear, and the driving motor is connected with the driving gear.

3. The radiation dose adjustment device according to claim 2, characterized in that: The source switch comprises a source switch body, a source switch body component, a source switch body driving device capable of driving the source switch body component to rotate, a collimator and a source switch body bearing. The source switch body component and the source switch body driving device are arranged in the source switch body, the collimator is arranged on the source switch body component and passes through the source switch body component, a source switch body bearing is arranged on the lower end surface of the source switch body, an inner ring of the source switch body bearing is installed on the source switch body, and the source switch body component is located above the beam outlet.

4. The radiation dose adjustment device according to claim 3, characterized in that: The source switch body component is cylindrical, and a source switch body component gear is arranged on the outside. The source switch body driving device includes a source switch body driving gear and a source switch body driving motor. The source switch body driving gear is meshed with the source switch body component gear, and the source switch body driving motor is connected to the source switch body driving gear.

5. The radiation dose adjustment device according to claim 4, characterized in that: The source switch further comprises a transition gear, and the source switch body driving gear is meshed with the source switch body component gear through the transition gear.

6. The radiation dose adjustment device according to claim 5, characterized in that: The shielding plate device also includes a limit switch, and the limit switch is arranged on the base.

7. The radiation dose adjustment device according to claim 6, characterized in that: There are two limit switches, which are respectively located at an open source state position and a closed source state position on the base.

8. The radiation dose adjustment device according to any one of claims 1 to 7, characterized in that: The shading plate material is a high-density tungsten alloy.

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