A multi-channel conversion X-ray source applicator

Abstract

The present invention relates to a multi-channel conversion X-ray source applicator, comprising a guide column 10, a channel conversion column 20 and a joint rod 30, wherein the channel conversion column 20 rotates coaxially relative to the guide column 10, the guide column is provided with a plurality of guide holes 11 with equal radius circumferential distribution, the channel conversion column is provided with a conversion channel 21, the inlet 21a of the conversion channel 21 is connected to the joint rod 30, and the output port 21b of the conversion channel is connected to one of the guide holes 11. The beneficial effects of the present invention are: a multi-channel guide column is used to form a multi-channel gynecological vaginal applicator, and a single X-ray source can enter different applicator channels respectively through the channel conversion column, without the need to repeatedly install and adjust the coordination between the X-ray source and the applicator; the applicator provided with a uterine cavity tube assembly has a complete cervical applicator function, and can make the radiotherapy equipment of the X-ray source better suitable for gynecological close-range radiotherapy.

Description

Technical Field

[0001] The invention relates to radiotherapy equipment, in particular to a multi-channel conversion X-ray source applicator. Background Art

[0002] With the development of manufacturing industry and the progress of radiotherapy technology, 50KV micro X-ray sources have been developed and specialized close-range radiotherapy equipment has begun to enter the application field. Radiotherapy based on micro X-ray sources can be used to directly irradiate tumor tissue or surgical cavity after resection during surgery for a single high-dose irradiation, i.e. intraoperative radiotherapy; it is also used for close-range radiotherapy of superficial skin tissue, rectum, gynecological cervix and vagina. X-ray source radiotherapy equipment has the characteristics of low energy and easy protection. It does not require a special protection room and can be operated in the same room. It has good radiation safety and is an effective supplement to existing radiotherapy technology. Taking the Xoft treatment machine as an example, the micro X-ray tube is located at the head end of the cooling duct. The entire cooling duct is fixed on the mechanical arm of the machine. The cathode power supply is provided to the machine body through an extremely thin high-voltage power supply line. The mechanical arm is equipped with a positioning system to drive the cooling duct forward.

[0003] In gynecological brachytherapy, the current Xoft X-ray source radiotherapy equipment is equipped with a single-channel vaginal cylindrical applicator and a three-channel cervical applicator. For vaginal cylindrical applicators, existing studies have confirmed that multi-channels are more dose-modulating than single-channels, while the cervical applicator source has an 8mm diameter running channel, which is difficult to insert. Therefore, the standard applicators of the two devices are difficult to meet the needs of domestic gynecological radiotherapy. The demand for multi-channel vaginal applicators can be solved through 3D printing technology, but during the treatment process, when switching from one treatment channel to the next, the device hardware cannot automatically switch. It is necessary to manually operate the robotic arm to withdraw the x-ray source from the channel of the applicator, and then operate the robotic arm to insert the x-ray source into a channel. In this process, the relative position of the cooling catheter and the applicator needs to be adjusted, and problems such as source treatment position error and channel selection error may be introduced. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-channel conversion X-ray source applicator to provide a more effective and more convenient-to-operate applicator for X-ray source gynecological close-range radiotherapy equipment.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a multi-channel conversion X-ray source applicator, including a guide column 10, a channel conversion column 20 and a joint rod 30, the channel conversion column 20 rotates coaxially relative to the guide column 10, the guide column is provided with a plurality of guide holes 11 distributed on a circle with equal radius, the channel conversion column is provided with a conversion channel 21, the inlet 21a of the conversion channel 21 is connected to the joint rod 30, and the output port 21b of the conversion channel is connected to one of the guide holes 11.

[0006] Furthermore, in order to communicate with the joint rod, the inlet 21a of the conversion channel is coaxial with the axis 2C of the channel conversion column.

[0007] Furthermore, in order to realize the rotational positioning of the channel conversion column, the guide column 10 is provided with a conversion connection hole 12, the channel conversion column 20 is rotationally matched with the conversion connection hole 12, the inner wall of the conversion connection hole is provided with a positioning groove 13, and the channel conversion column is provided with a positioning ball 22, and the positioning ball 22 is elastically embedded in the positioning groove 13, so that the output port 21b of the conversion channel is respectively connected to multiple guide holes 11.

[0008] Furthermore, in order to axially position the channel conversion column, the channel conversion column 20 is provided with a conversion column axial ring groove 23 , and the guide column is provided with a first positioning screw 14 , and the first positioning screw 14 is embedded in the conversion column axial ring groove 23 .

[0009] Furthermore, in order to connect and match with the radiotherapy equipment, a catheter connector 31 is provided at the tail end of the connector rod 30, and the catheter connector is connected to the mechanical arm 40 of the radiotherapy equipment.

[0010] Furthermore, a structural design of a guide hole is that the front end of the guide hole 11 is a closed end 11a, the multiple guide holes are parallel to the axis of the guide column, the distance L1 from the tail end of the connecting rod to the front end of the guide hole is equal to the marked length L0 of the radiation source catheter, and the length L2 of the guide hole 11 is less than the catheter driving stroke L5 of the radiotherapy equipment.

[0011] Furthermore, a connection structure between a channel conversion column and a joint rod is that the channel conversion column 20 is provided with a joint hole 24, the joint rod 30 is rotatably matched with the joint hole 24, the joint rod is provided with a first axial ring groove 32, and the channel conversion column is provided with a positioning pin 25, and the positioning pin is embedded in the first axial ring groove.

[0012] Furthermore, another structural design of the guide hole is that a uterine cavity tube 15 is provided at the front end of the guide column 10, and the guide hole includes a uterine cavity guide hole 11c connected to the uterine cavity tube.

[0013] Furthermore, another connection structure between the channel conversion column and the joint rod is that the channel conversion column 20 is provided with a joint guide rod 26, and the joint rod 30 is provided with a joint guide sleeve 33. The joint guide rod 26 and the joint guide sleeve 33 are rotationally matched and slidably matched, and the joint guide rod 26 is provided with a circle of second axial ring grooves 27, and the joint guide sleeve is provided with a second positioning screw 34 and a third positioning screw 35; when the second positioning screw 34 is embedded in the second axial ring groove 27, the distance L3 from the tail end of the joint rod to the front end of the uterine cavity tube is equal to the marked length of the radiation source catheter; when the third positioning screw 35 is embedded in the second axial ring groove 27, the distance L4 from the tail end of the joint rod to the front end of the other guide hole is equal to the marked length of the radiation source catheter.

[0014] Furthermore, in order to allow the radiation source catheter to smoothly enter the conversion channel, a groove 28 is provided at the rear end of the conversion channel.

[0015] The beneficial effects of the present invention are: a multi-channel guide column is used to form a multi-channel gynecological vaginal applicator, and a single X-ray source can enter different applicator channels respectively through a channel conversion column, without the need to repeatedly install and adjust the coordination between the X-ray source and the applicator; the applicator provided with a uterine cavity tube assembly has a complete cervical applicator function, which can make the X-ray source radiotherapy equipment better suitable for gynecological close-range radiotherapy.

[0016] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present invention;

[0018] Figure 2 It is a cross-sectional view of the present invention;

[0019] Figure 3 It is a structural exploded view of the present invention;

[0020] Figure 4 The guide post is Figure 2 AA section view;

[0021] Figure 5 It is a structural diagram of the source applicator of the present invention installed on the source applicator bracket;

[0022] Figure 6 It is a structural diagram of the mechanical arm of the applicator and radiotherapy equipment of the present invention;

[0023] Figure 7 1. is a diagram showing the connection state of the source applicator of the present invention and the mechanical arm of the radiotherapy equipment;

[0024] Figure 8 It is a structural diagram of the present invention for installing a radiation source catheter;

[0025] Fig. 9 is a state diagram of the radiation source catheter of the present invention moving forward to perform radiotherapy;

[0026] Fig.10 This is a state diagram of the radiation source catheter of the present invention moving backward and exiting the guide hole;

[0027] Fig.11 The state diagram of the present invention is that the channel conversion column is rotated to make the conversion channel correspond to another guide hole;

[0028] Fig.12 This is a state diagram of the radiation source catheter of the present invention moving forward and entering another catheter;

[0029] Fig.13 It is a structural diagram of the guide post of the present invention provided with a uterine cavity tube;

[0030] Fig.14 yes Fig.13 Cross-section of the structure;

[0031] Fig.15 yes Fig.13 A side view of the guide post of the structure;

[0032] Fig.16 yes Fig.13 Structural diagram of the guide pillars of the structure;

[0033] Fig.17 It is a state diagram when the joint rod moves to the front end;

[0034] Fig.18 It is a state diagram of the joint rod moving to the rear end. DETAILED DESCRIPTION

[0035] Embodiment 1:

[0036] like Figures 1 to 4 A multi-channel conversion X-ray source applicator includes a guide column 10, a channel conversion column 20 and a joint rod 30.

[0037] The guide post 10 is provided with three guide holes 11, and the three guide holes 11 are distributed around the same radius, that is, the distance R1 from each guide hole to the center of the guide post is equal, and the three guide holes are equally distributed around the circumference (that is, the circumference is distributed at an angle of 120 degrees). The front end of the guide hole 11 is a closed end 11a, which is close to the front end of the guide post. The three guide holes are parallel to the axis of the guide post and close to the outer wall of the guide post, so as to be closer to the radiotherapy target area.

[0038] A conversion connection hole 12 is provided at the rear end of the guide post 10 . Three positioning grooves 13 are provided on the inner wall of the conversion connection hole. The positioning grooves 13 are spherical grooves. The three positioning grooves 13 are equally distributed on the circumference of the inner wall of the conversion connection hole 12 .

[0039] The guide column 10 is provided with an axial positioning screw hole 16 , and a first positioning screw 14 is disposed in the axial positioning screw hole 16 .

[0040] The guide column 10 is also provided with a mounting foot 17 for mounting and fixing the multi-channel conversion X-ray source applicator.

[0041] The channel conversion column 20 is provided with a conversion channel 21, which is a curved through hole, and the inlet 21a of the conversion channel is coaxial with the axis 2C of the channel conversion column. The output port 21b of the conversion channel is offset from the axis 2C of the channel conversion column, and the offset R2 is equal to the center distance R1 from the guide hole 11 to the guide column.

[0042] The channel conversion column 20 is provided with a positioning ball 22, which is an elastic positioning ball. The positioning ball is arranged in a positioning ball blind hole 29 of the channel replacement column, and a spring 22a that should press the positioning ball 22 is installed in the blind hole 29.

[0043] The channel conversion column 20 is provided with a conversion column axial ring groove 23.

[0044] A joint hole 24 is provided at the rear end of the channel conversion column 20 , a pin hole 25 a is provided on the hole wall of the joint hole 24 , and a positioning pin 25 is provided in the pin hole 25 a .

[0045] The joint rod 30 is provided with a central through hole 36 , a first axial annular groove 32 is provided at the front end of the joint rod 30 , a catheter joint 31 is provided at the rear end of the joint rod 30 , and the catheter joint 31 is provided with a V-shaped groove 31 a .

[0046] The channel conversion column 20 is rotatably matched with the conversion connection hole 12 of the guide column, so that the channel conversion column 20 can coaxially rotate relative to the guide column 10, and the first positioning screw 14 is embedded in the conversion column axial ring groove 23, limiting the axial movement between the channel conversion column and the guide column. By rotating the channel conversion column 20, the positioning ball 22 is elastically embedded in the three positioning grooves 13 respectively, so that the output port 21b of the conversion channel is connected to the three guide holes 11 respectively.

[0047] The joint rod 30 is rotatably matched with the joint hole 24 of the channel conversion column, so that the channel conversion column can rotate coaxially relative to the joint rod. The positioning pin 25 of the channel conversion column is embedded in the first axial ring groove to limit the axial movement between the channel conversion column and the joint rod. The inlet 21a of the conversion channel 21 is connected to the joint rod 30, so that the central through hole 36 of the joint rod is coaxially connected with the inlet 21a of the conversion channel.

[0048] Reference Figure 6 and Fig. 9The catheter connector 31 of the connector rod is connected to the mechanical arm 40 of the radiotherapy device. The mechanical arm 40 is provided with a V-shaped clamp 41 corresponding to the V-shaped groove 31a of the catheter connector, and the V-shaped clamp 41 is embedded in the V-shaped groove 31a, so that the connector rod 31 is connected to the mechanical arm 40 of the radiotherapy device.

[0049] The multi-channel conversion X-ray source applicator of this embodiment is used in the radiotherapy of X-ray source radiotherapy equipment (such as Xoft therapy machine). Figure 7 As shown, the X-ray source radiotherapy device is equipped with a radiation source catheter 50, and the X-ray source is located at the end (front end) of the radiation source catheter 50. The radiation source catheter 50 is provided with a mark 51, and the length from the mark 51 to the end of the radiation source catheter can be referred to as the mark length L0. After the guide column 10, the channel conversion column 20 and the joint rod 30 are assembled, the distance L1 from the tail end of the joint rod to the front end of the guide hole (such as Figure 2 The mark 51 is equal to the marking length L0 of the radiation source catheter. Thus, the mark 51 can indicate the position of the front end of the radiation source catheter in the applicator. When the mark 51 reaches the tail end of the connector rod, it can indicate that the end of the radiation source catheter has reached the front end 11a of the guide hole 11, and the radiation source catheter cannot continue to extend into the applicator.

[0050] A slide 42 is provided on the mechanical arm 40 of the radiotherapy device, and the slide 42 slides on the mechanical arm 40. The radiation source catheter 50 is installed on the slide 42 through the catheter seat 52. The slide 42 drives the radiation source catheter to move within the driving stroke L5 range, so that the X-ray source reaches the required resident position (there may be multiple resident positions) along the guide hole 11. In order to realize the conversion of the guide hole, the length L2 of the guide hole 11 is less than the catheter driving stroke L5 of the radiotherapy device.

[0051] like Figures 5 to 8 When in use, first position and fix the guide column 10 in the patient's body, and install the multi-channel conversion X-ray source applicator on the applicator bracket 60 through the guide column mounting foot 17, as shown in FIG. Figure 5 Then operate the mechanical arm 40 of the radiotherapy device, connect the joint rod 31 with the mechanical arm 40 of the radiotherapy device through the V-shaped clamp 41 and the V-shaped clamping groove 31a, and move the slide seat 42 of the mechanical arm to the rear end, as shown. Figure 6 , Figure 7 Then, the radiation source catheter 50 is passed through the joint rod 30 and enters the conversion channel 21 of the channel conversion column 20. The catheter seat 52 is installed on the slide seat 42 so that the radiation source catheter 50 is positioned on the mechanical arm 40. Figure 8 shown.

[0052] The channel conversion column 20 is rotated so that the conversion channel 21 corresponds to a guide hole 11, and the positioning ball 22 is elastically embedded in the corresponding positioning groove 13, so that the channel conversion column 20 is kept in the position of the guide column 10. The slide seat 42 of the robot arm is operated to move the radiation source to the stationary position for radiotherapy. When the slide seat 42 moves to the front end, the end of the radiation source catheter 50 also reaches the front end 11a of the guide hole 11, and the mark 51 of the radiation source catheter 50 reaches the tail end of the connector rod, as shown in FIG. Fig. 9 shown.

[0053] After the radiation source completes the radiation therapy in one guide hole, it can be switched to another guide hole to continue the radiation therapy. Fig.10 As shown, the slide 42 of the robot arm is operated to move to the end of the stroke. At this time, since the length L2 of the guide hole 11 is less than the catheter driving stroke L5 of the radiotherapy device, the radiation source catheter 50 will completely withdraw from the guide hole 11 of the guide column. Fig.11 As shown, the channel conversion column 20 is rotated to make the conversion channel 21 correspond to another guide hole. Fig.12 As shown, the slide 42 of the robot arm is operated to move the radiation source to the stationary position, and the radiation therapy is continued until the radiation therapy of multiple channels is completed.

[0054] The present invention adopts a combined structure of a guide column 10, a channel conversion column 20 and a connector rod 30. The guide column is fixed in the patient's body, the connector rod is fixedly connected to the mechanical arm of the radiotherapy equipment, and the central through hole 36 of the connector rod, the conversion channel 21 of the channel conversion column and the guide hole 11 of the guide column constitute a radiotherapy channel. The channel conversion column rotates relative to the guide column and the connector rod to achieve the conversion of the radiotherapy channel. At the same time, a structured design is also achieved. Guide columns of various specifications (including guide column length, diameter, position and number of guide holes) can be used to conveniently adapt to various treatment cases, and connector rods of various specifications (including catheter connectors of various structures) can be used to adapt to various radiotherapy equipment.

[0055] The present invention makes up for the deficiency of the source applicator of the existing X-ray source radiotherapy equipment according to the practical application of gynecological brachytherapy, so that the X-ray source radiotherapy equipment is better suitable for gynecological brachytherapy.

[0056] Embodiment 2:

[0057] like Figures 13 to 18 , a multi-channel conversion X-ray source applicator, this embodiment is an improvement of embodiment one.

[0058] The multi-channel conversion X-ray source applicator of the first embodiment is applicable to gynecological radiotherapy including vaginal radiotherapy. This embodiment is improved on the basis of the first embodiment, making it a more suitable applicator for cervical radiotherapy.

[0059] In this embodiment, a uterine cavity tube 15 is provided at the front end of the guide post 10. In order to be suitable for cervical radiotherapy, the uterine cavity tube 15 is slightly curved. The guide post 10 is provided with three guide holes, including a uterine cavity guide hole 11c, and the uterine cavity tube 15 is connected to the uterine cavity guide hole 11c of the uterine cavity tube. The front end of the uterine cavity guide hole 11c is set at the center of the guide post. The uterine cavity tube 15 is connected to the uterine cavity guide hole 11c by a thread.

[0060] The guide post 10 is also provided with two other guide holes 11e arranged on both sides of the uterine cavity guide hole 11c. Thus, the uterine cavity guide hole 11c and the guide holes 11e on both sides constitute a typical cervical applicator structure. The three guide holes are all guide holes of a curved structure, and the rear ends of the three guide holes are equally distributed around the circumference, corresponding to the conversion channel 21 of the channel conversion post 20.

[0061] The channel conversion column 20 is provided with a joint guide rod 26, and the joint rod 30 is provided with a joint guide sleeve 33. The joint guide rod 26 and the joint guide sleeve 33 are rotationally and slidably matched. The channel conversion column 20 can rotate relative to the joint rod 30 and can also slide relative to the joint rod along the axial direction.

[0062] The joint guide rod 26 is provided with a circle of second axial ring groove 27 , and the joint guide sleeve is provided with a second positioning screw 34 and a third positioning screw 35 , and the ends of the second positioning screw 34 and the third positioning screw 35 can be respectively embedded in the second axial ring groove 27 .

[0063] When the joint rod 30 moves to the front end relative to the channel conversion column 20, as shown in FIG. Fig.17 As shown, the second positioning screw 34 is embedded in the second axial ring groove 27, and the distance L3 from the rear end of the connector rod to the front end of the uterine cavity tube is equal to the marked length of the radiation source catheter, so that the radiation source can reach the end of the uterine cavity tube.

[0064] When the joint rod 30 moves to the rear end relative to the channel conversion column 20, as shown in FIG. Fig.18 As shown, the third positioning screw 35 is embedded in the second axial ring groove 27, and the distance L4 from the rear end of the joint rod to the front end of the guide hole 11e on both sides is equal to the marked length of the radiation source catheter, which can control the travel of the radiation source not to exceed the front end of the guide hole 11e on both sides.

[0065] In this embodiment, the radiotherapy channel can be switched between the uterine cavity guide hole 11c and the guide holes 11e on both sides by rotating the channel conversion column 20. In cervical radiotherapy, the radiation source needs to move between different strokes and positions. By moving the position of the joint rod 30 forward and backward, the stroke position of the radiation source can be controlled to meet the requirements of different stroke positions of the radiation source.

[0066] As the joint rod moves backward, Fig.18As shown, the inner diameter of the joint guide sleeve 33 is larger than the conversion channel 21 of the channel conversion column. In order to allow the radiation source catheter 50 to smoothly enter the conversion channel 21, a groove 28 is provided at the rear end of the conversion channel 21.

Claims

1. A multi-channel conversion X-ray source applicator, characterized in that: The invention comprises a guide column (10), a channel conversion column (20) and a joint rod (30), wherein the channel conversion column (20) rotates coaxially with respect to the guide column (10), the guide column is provided with a plurality of guide holes (11) distributed on a circumference with equal radius, the channel conversion column is provided with a conversion channel (21), the inlet (21a) of the conversion channel (21) is connected to the joint rod (30), and the output port (21b) of the conversion channel is connected to one of the guide holes (11); the guide column (10) is provided with a conversion connection hole (12), the channel conversion column (20) is rotatably matched with the conversion connection hole (12), the inner wall of the conversion connection hole is provided with a positioning groove (13), the channel conversion column is provided with a positioning ball (22), the positioning ball (22) is elastically embedded in the positioning groove (13), so that the output port (21b) of the conversion channel is respectively connected to the plurality of guide holes (11).

2. The multi-channel conversion X-ray source applicator according to claim 1, characterized in that: The inlet (21a) of the conversion channel is coaxial with the axis (2C) of the channel conversion column.

3. The multi-channel conversion X-ray source applicator according to claim 1, characterized in that: The channel conversion column (20) is provided with a conversion column axial ring groove (23), and the guide column is provided with a first positioning screw (14), and the first positioning screw (14) is embedded in the conversion column axial ring groove (23).

4. The multi-channel conversion X-ray source applicator according to claim 1, characterized in that: A catheter connector (31) is provided at the tail end of the connector rod (30), and the catheter connector is connected to a mechanical arm (40) of the radiotherapy equipment.

5. The multi-channel conversion X-ray source applicator according to claim 1, characterized in that: The front end of the guide hole (11) is a closed end (11a), the plurality of guide holes are parallel to the axis of the guide column, the distance (L1) from the rear end of the connector rod to the front end of the guide hole is equal to the marked length (L0) of the radiation source catheter, and the length (L2) of the guide hole (11) is less than the catheter driving stroke (L5) of the radiotherapy equipment.

6. The multi-channel conversion X-ray source applicator according to claim 5, characterized in that: The channel conversion column (20) is provided with a joint hole (24), the joint rod (30) is rotatably engaged with the joint hole (24), the joint rod is provided with a first axial ring groove (32), and the channel conversion column is provided with a positioning pin (25), the positioning pin being embedded in the first axial ring groove.

7. The multi-channel conversion X-ray source applicator according to claim 1, characterized in that: A uterine cavity tube (15) is provided at the front end of the guide column (10), and the guide hole comprises a uterine cavity guide hole (11c) connected to the uterine cavity tube.

8. The multi-channel conversion X-ray source applicator according to claim 7, characterized in that: The channel conversion column (20) is provided with a joint guide rod (26), and the joint rod (30) is provided with a joint guide sleeve (33). The joint guide rod (26) and the joint guide sleeve (33) are rotationally matched and slidably matched. The joint guide rod (26) is provided with a circle of second axial ring grooves (27), and the joint guide sleeve is provided with a second positioning screw (34) and a third positioning screw (35); when the second positioning screw (34) is embedded in the second axial ring groove (27), the distance (L3) from the rear end of the joint rod to the front end of the uterine cavity tube is equal to the marked length of the radiation source catheter; when the third positioning screw (35) is embedded in the second axial ring groove (27), the distance (L4) from the rear end of the joint rod to the front end of the other guide hole is equal to the marked length of the radiation source catheter.

9. The multi-channel conversion X-ray source applicator according to claim 7, characterized in that: The tail end of the conversion channel is provided with a groove (28).

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