CN102728002A - Mobile Horizontal Intraoperative Radiation Therapy Machine - Google Patents

Abstract

A movable horizontal intraoperative radiation therapy apparatus comprises a modulator, an electron gun, an accelerating tube, a cooling system, a microwave system and a deflection device, wherein the accelerating tube is horizontally arranged on a swinging rack, the swinging rack is connected into a support through a rotating shaft, the support is arranged on a trolley, the rotating shaft of the rack is parallel to the axial lead of the accelerating tube, the deflection device is arranged at a beam outlet positioned at the front end of the accelerating tube, the electron gun is arranged at the rear end of the accelerating tube, the microwave system is arranged on the outer side of the accelerating tube and is connected with the swinging rack, the modulator can be arranged outside an operating room and is connected through a cable, a protection positioning sleeve is coaxially arranged with a beam line below the deflection device, and the accelerating tube adopts an S-waveband edge coupling standing wave or traveling wave accelerating tube. The invention distributes a part of accelerating tube weight to the rear end, enables electrons to emit beams at required angles through the deflection device, has energy spectrum deflection superior to a direct-injection type, enables the load of the whole structure to be more reasonable, and can enter an operating room to carry out radiotherapy in operation.

Description

Mobile Horizontal Intraoperative Radiation Therapy Machine

Technical field:

The invention relates to the field of nuclear physics, in particular to an electron linear accelerator, in particular to a high-energy electron linear accelerator used for radiation therapy in clinical medicine, and in particular to a movable horizontal intraoperative radiation therapy machine.

Background technique:

The therapeutic effect of ionizing radiation is the result of a series of physical, chemical and biological reactions after ionizing radiation acts on the human body. After resection of malignant tumor tissue during surgery, the exposed tissue has a good blood supply and is in a state of aerobic metabolism, so it is more sensitive to radiotherapy (oxygen effect). For non-eradication tumors, suspected non-eradication tumors or tumors that cannot be removed by surgery, a one-time high-dose irradiation of the tumor and residual lesions, as well as possible metastasis and recurrence sites, can play a role in the treatment of unresectable or incompletely resectable tumors. Effective suffocation (shrinking tumor size, relieving pain, stopping bleeding, relieving symptoms, etc.), significantly improves the survival rate and quality of life of patients, and removes small metastases to reduce the chance of remaining tumors in the tumor bed. However, clinically, tumor patients need to be operated in the surgical operating room, and then transferred to the treatment room of the radiotherapy department for irradiation. During the whole process, various monitors and rescue equipment must be carried, which is quite difficult and inconvenient.

Invention content:

The object of the present invention is to provide a movable horizontal intraoperative radiotherapy machine, which solves the technical problem that the radiotherapy machine cannot enter the operating room for treatment in the prior art .

The movable horizontal intraoperative radiotherapy machine of the present invention includes a modulator, an electron gun, an accelerating tube, a cooling system, a microwave system and a deflection device, wherein the accelerating tube is horizontally arranged on a swing frame, and the The above-mentioned swing frame is connected in a bracket through a rotating shaft, and the described bracket is arranged on a trolley, and the described rotating shaft is parallel to the axis line of the accelerating tube, and the described deflection device is arranged at the front end of the accelerating tube. At the beam outlet, the electron gun is arranged at the rear end of the accelerating tube, the microwave system is arranged outside the accelerating tube and connected to the swing frame, and the modulator is respectively connected to the electron gun and the microwave system through wires, Below the deflection device, a protective positioning sleeve is arranged coaxially with the beam line. The accelerating tube is an S-band accelerating tube. The S-band accelerating tube is an edge-coupled standing wave accelerating tube or a traveling wave accelerating tube. The described The cooling system is connected with the accelerating tube and the microwave system.

Further, the angle at which the swing frame rotates around the rotation axis is between plus and minus 45 degrees.

Further, the deflection angle generated by the deflection magnet for the accelerated beam is between 60° and 120°.

Further, the electron gun, accelerating tube, microwave system and deflection device are arranged in an operating room, and the cooling system is arranged outside the operating room and connected to the accelerating tube and the microwave system through water pipes.

Still further, the modulator is set outside the operating room.

Further, the outer circumference of the acceleration tube is provided with a radiation protection device.

The working principle of the present invention is: the acceleration tube is horizontally installed on the swing frame, and can rotate and swing around the rotating shaft in the bracket between plus and minus 45 degrees, and the bracket is fixed on the mobile cart, which can enter and exit the operating room. The deflection device at the beam exit of the accelerating tube can be used to adjust the exit direction arbitrarily between 60 and 120 degrees, which can meet the needs of different treatment parts and treatment directions. The special protective positioning sleeve, the radiation protection device on the periphery of the accelerator and the ray blocker at the far end of the beam axis provide simple protection for intraoperative radiotherapy in the operating room. It meets the existing national requirements for environmental radiation safety. The modulator outputs a suitable pulse voltage, and the microwave system such as the magnetron provides high-power microwave energy to the linear acceleration tube on the swing frame. After being accelerated by the acceleration tube, the electron beam is deflected by 60 degrees to 120 degrees, and then irradiates the treatment in a scanning manner. By using the advantages of radiobiology, the waiting time interval between surgery and radiotherapy is eliminated, and the phenomenon of accelerated cancer cell proliferation that may occur during this period is avoided.

Compared with the prior art, the present invention has positive and obvious effects. The invention utilizes the horizontal accelerating tube structure to distribute the weight of a part of the accelerating tube to the rear end, and the deflection device enables the electrons to emit beams according to the required angle, and the energy spectrum deflection is better than that of the direct beam type, which makes the load of the whole structure more reasonable; S-band edge coupling is adopted The standing wave accelerating tube or the traveling wave accelerating tube reduces the manufacturing cost.

Description of drawings:

Figure 1 is a schematic diagram of the structure of the movable horizontal intraoperative radiotherapy machine of the present invention.

Fig. 2 is a schematic diagram of the rotation of the accelerating tube and the electron gun in Fig. 1, and the two dotted lines in the figure show the two limit positions of the left and right rotation.

Fig. 3 is an assembly schematic diagram of a movable horizontal intraoperative radiotherapy machine of the present invention.

Fig. 4 is a left side view of Fig. 3 .

Detailed ways:

Example 1:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the movable horizontal intraoperative radiotherapy machine of the present invention includes a modulator 10, an electron gun 1, an accelerating tube 2, a microwave system 6 and a deflection device 7, wherein, The acceleration tube 2 is horizontally arranged on a swing frame 4, the swing frame 4 is connected in a support 3 through a rotating shaft 41, and the support 3 is arranged on a trolley 5, and the The rotating shaft 41 is parallel to the axis line of the accelerating tube 2, the deflection device 7 is arranged at the beam outlet at the front end of the accelerating tube 2, the electron gun 1 is arranged at the rear end of the accelerating tube 2, and the microwave system 6 is arranged on the outside of the accelerating tube 2 and connected to the swing frame 4. The modulator 10 is arranged outside the operating room and connected to the electron gun 1 and the microwave system 6 through wires. The deflection device 7 is below the beam line. A protective positioning sleeve 8 is arranged coaxially, and the accelerating tube 2 is an S-band accelerating tube, and the S-band accelerating tube 2 is an edge-coupled standing wave accelerating tube or a traveling wave accelerating tube.

Further, the angle at which the swing frame 4 rotates around the rotating shaft 41 is between plus and minus 45 degrees.

Further, the deflection angle generated by the deflection device 7 for the accelerated beam is between 60° and 120°.

Further, the modulator 10 can be set outside the operating room and connected to the electron gun and the microwave system respectively through wires.

Further, the outer circumference of the acceleration tube 2 is provided with a radiation protection device 11 .

As shown in Figure 3, the specific use process of this embodiment is: the patient 12 is on the operating bed 9, the protective positioning sleeve 8 is fixed on the operating bed 9 through the support frame 81, and the rotation of the swing frame 4 drives the acceleration tube 2 and The deflection device 7 rotates together, so that the electron beam can be adjusted according to the spatial angle required by the treatment. The adjustment angle range is plus or minus 45 degrees, as shown by the dotted line in Figure 4. At the same time, the deflection angle of the electron beam can be adjusted at 60° by adjusting the deflection voltage. From 120 degrees to 120 degrees, the three-dimensional adjustment of the electron beam angle can be realized to meet the needs of different treatment parts and treatment directions.

Claims (6)

1. removable horizontal introoperative radiotherapy machine; Comprise manipulator, electron gun, accelerating tube, cooling system, microwave system and arrangement for deflecting, it is characterized in that: described accelerating tube is horizontally set on the swing frame, and described swing frame is connected in the support through a rotating shaft; Described support is arranged in the go-cart; The axis parallel of described rotating shaft and accelerating tube, described arrangement for deflecting are set in place in the bundle mouth that goes out of accelerating tube front end and locate, and described electron gun is arranged on the rear end of accelerating tube; Described microwave system is arranged on the outside of accelerating tube and is connected with the swing frame; Described manipulator is connected with microwave system with electron gun respectively through lead, the below of arrangement for deflecting, and beam line be coaxially arranged with one and protect abutment sleeve, accelerating tube is the S-band accelerating tube; Described S-band accelerating tube is limit coupled standing wave accelerator tube or travelling wave accelerating tube, and described cooling system is connected with microwave system with accelerating tube.

2. removable horizontal introoperative radiotherapy machine as claimed in claim 1 is characterized in that: the angle that the swing frame rotates around the axis is between positive and negative 45 degree.

3. removable horizontal introoperative radiotherapy machine as claimed in claim 1 is characterized in that: the deflection angle that deflection magnet produces the line that quickens is between 60 ~ 120 degree.

4. removable horizontal introoperative radiotherapy machine as claimed in claim 1; It is characterized in that: described electron gun, accelerating tube, microwave system and arrangement for deflecting are arranged in the operating room, and described cooling system is arranged on described out operating-room, also is connected with microwave system with accelerating tube through water pipe.

5. removable horizontal introoperative radiotherapy machine as claimed in claim 4, it is characterized in that: described manipulator is arranged on out operating-room.

6. removable horizontal introoperative radiotherapy machine as claimed in claim 1, it is characterized in that: the accelerating tube periphery is provided with and departs from radioprotector.

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