Source skin distance measuring device and radiotherapy system

Abstract

The utility model discloses a source skin distance measuring device and a radiotherapy system, the source skin distance measuring device comprises a positioning mechanism, a measuring mechanism and a detecting mechanism which are connected in sequence, and the distance between a radioactive source and the skin surface of a patient can be accurately measured. The positioning mechanism comprises a fixed seat and a sleeve, and ensures that the device is stably mounted at the emitting end of the radioactive source; a scale rod in the measuring mechanism can move along the axial direction of the sleeve so as to realize accurate distance measurement; a touch head in the detection mechanism is used for making contact with the skin surface of a patient. Through the structural design of the knurled screw, the limiting groove and the like, the stability and the precision of measurement are enhanced. The measuring device is integrated in the radiotherapy system, the accelerator can be flexibly positioned through the manipulator, and rapid and accurate source skin distance measurement is realized, so that the dose distribution of radiotherapy is optimized, the treatment effect is improved, and the safety of a patient is guaranteed. The device is simple in structure and convenient to operate, and the source skin distance measurement precision and efficiency in radiotherapy can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to a source-skin distance measuring device and a radiotherapy system. Background Art

[0002] In the existing radiotherapy process, the accurate measurement of the source-skin distance (SSD) is crucial because the deviation of the source-skin distance will directly affect the dose distribution in the treatment area, thereby affecting the treatment effect. However, there are many deficiencies in the methods and devices for measuring the source-skin distance in the prior art. Most traditional measurement methods rely on manual measurement, which is not only cumbersome to operate but also easily affected by human factors, resulting in large errors in the measurement results. In addition, although some automated devices can improve the measurement accuracy, their structures are complex, the costs are high, and there are certain technical difficulties in operation, making it difficult to be widely used in actual clinical practice.

[0003] The current measurement devices usually require a complex calibration process before treatment and often lack real-time performance. In practical applications, the adjustment of the patient's body position and the change of the skin surface may both lead to the deviation of the source-skin distance. Therefore, how to accurately measure the source-skin distance has become an urgent problem to be solved. In addition, the existing measurement devices may cause certain discomfort to the patient during use, affecting the patient's treatment experience and effect.

[0004] To solve the above problems, it is urgent to propose a new type of source-skin distance measuring device to improve the measurement accuracy of the source-skin distance and reduce the operation difficulty. Summary of the Utility Model

[0005] The utility model provides a source-skin distance measuring device and a radiotherapy system to solve the problem of measuring the source-skin distance.

[0006] To solve the above technical problems, the technical solution of the utility model is as follows:

[0007] A source-skin distance measuring device, the source-skin distance measuring device includes a positioning mechanism, a measuring mechanism, and a detecting mechanism connected in sequence, wherein:

[0008] The positioning mechanism includes a fixed seat and a sleeve. The fixed seat is fixedly installed at the emitting end of the radiation source, and the sleeve is fixedly installed at the central position of the bottom end of the fixed seat;

[0009] The measuring mechanism includes a scale rod. One end of the scale rod extends into the interior of the sleeve, and the scale rod can axially move along the inner cavity of the sleeve;

[0010] The detecting mechanism includes a touch head. The touch head is installed at the other end of the scale rod and is used to contact the patient's skin surface.

[0011] Furthermore, an annular mounting portion is provided on the outer side of the sleeve, and a plurality of mounting holes are formed in the mounting portion. A plurality of first threaded holes adapted to the mounting holes are formed at the bottom end of the fixing seat;

[0012] The sleeve is connected to the fixing seat by positioning bolts passing through the mounting holes and the first threaded holes.

[0013] Furthermore, a socket hole is formed in the fixing seat in the vertical direction, and a portion of the sleeve above the mounting portion is inserted into the socket hole.

[0014] Furthermore, at least one second threaded hole is formed in the side wall of the sleeve, and a knurled screw is threadedly connected to the second threaded hole;

[0015] A limiting groove is provided on one side wall of the scale rod. The limiting groove is a blind groove, and one end of the knurled screw passes through the second threaded hole and remains extended into the limiting groove;

[0016] The knurled screw is configured to be screwed into the second threaded hole to adjust the end of the knurled screw extending into the sleeve to abut against the bottom of the limiting groove, and the scale rod is pressed against the inner wall of the sleeve as the knurled screw is continuously screwed in.

[0017] Furthermore, a section of scale line is provided on the scale rod, and a portion of the scale rod below the scale line is provided with a hollow structure to reduce the weight of the scale rod.

[0018] Furthermore, the touch head is a spherical touch head or a flat touch head.

[0019] Furthermore, the touch head is fixedly connected to the bottom end of the scale rod by gluing.

[0020] Furthermore, anti-slip patterns are provided on the outer surface of the scale rod.

[0021] Furthermore, the sleeve is made of aluminum alloy, and the surface of the touch head is covered with an antibacterial coating.

[0022] A radiotherapy system, the radiotherapy system includes a manipulator, an accelerator, a treatment couch and the aforementioned source-skin distance measuring device, wherein:

[0023] The accelerator is fixedly installed at the end of the manipulator, and at least one secondary collimator mounting port is provided at the emission end of the radiation source of the accelerator. The secondary collimator mounting port is configured to be able to mount a secondary collimator;

[0024] The size of the fixed seat in the source-skin distance measuring device is the same as that of the secondary collimator. The fixed seat is embedded and installed in the installation port of the secondary collimator, and the scale rod in the source-skin distance measuring device points to the treatment couch.

[0025] Compared with the prior art, the beneficial effects of the technical solution of the present utility model are as follows:

[0026] The present utility model provides a source-skin distance measuring device and a radiotherapy system. Through delicate mechanical structure design, accurate measurement of the distance between the radiation source and the patient's skin surface is achieved, which has the advantages of convenient operation, stable measurement, and high accuracy. The radiotherapy system integrated with this measuring device can quickly and accurately measure the source-skin distance, optimize the treatment dose distribution, significantly improve the radiotherapy effect and patient safety, and is applicable to various radiotherapy scenarios. The overall design reduces the operation difficulty, increases the portability and reliability of the device, and is suitable for clinical application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic structural diagram of the source-skin distance measuring device provided in an embodiment of the present application;

[0029] Figure 2 For the present application Figure 1 is a schematic structural diagram of the fixed seat in the source-skin distance measuring device;

[0030] Figure 3 For the present application Figure 1 is a sectional view of the fixed seat in the source-skin distance measuring device;

[0031] Figure 4 For the present application Figure 1 is a bottom view of the fixed seat in the source-skin distance measuring device;

[0032] Figure 5 For the present application Figure 1 is a schematic structural diagram of the sleeve in the source-skin distance measuring device;

[0033] Figure 6 For the present application Figure 1 is a schematic structural diagram of the scale rod in the source-skin distance measuring device;

[0034] Figure 7It is a schematic structural diagram of a radiotherapy system provided in an embodiment of the present application;

[0035] Figure 8 It is a three-dimensional structural diagram of a radiotherapy system provided in an embodiment of the present application;

[0036] Figure 9 It is a schematic structural diagram of a secondary collimator mounting port and a secondary collimator in a radiotherapy system;

[0037] Figure 10 It is in Figure 9 A schematic structural diagram of a source-skin distance measuring device installed in the secondary collimator mounting port of;

[0038] Explanation of the markings in the figure:

[0039] 1. Fixed seat; 101. Socket hole; 102. First threaded hole; 2. Sleeve; 201. Mounting part; 202. Mounting hole; 203. Second threaded hole; 3. Knurled screw; 4. Scale rod; 401. Limit groove; 402. Weight reduction cavity; 5. Touch head;

[0040] 11. Manipulator; 12. Accelerator; 1201. Secondary collimator mounting port; 1202. Secondary collimator; 13. Source-skin distance measuring device; 14. Treatment couch. Detailed implementation mode

[0041] In order to better understand the purpose, structure and function of the present utility model, the technical solutions of the present utility model will be further described in detail below with reference to the drawings and specific preferred embodiments.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so they cannot be understood as limitations to the present utility model. The specific dimensions adopted in the embodiments are only for illustrating the technical solutions by way of example, and do not limit the protection scope of the present utility model. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0043] Unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Embodiment 1:

[0045] The source-skin distance (SSD) refers to the distance from the radiation source to the patient's skin surface, and its accuracy directly affects the dose distribution and treatment effect of radiotherapy. To improve the accuracy and efficiency of measuring the source-skin distance in radiotherapy, thereby optimizing the treatment effect and ensuring patient safety, the present utility model provides a technical solution:

[0046] As Figure 1 shown, the present utility model provides a source-skin distance measuring device, which includes a positioning mechanism, a measuring mechanism, and a detecting mechanism connected in sequence, wherein:

[0047] The positioning mechanism includes a fixed seat 1 and a sleeve 2. The fixed seat 1 is fixedly installed at the emitting end of the radiation source, used to determine the position of the radiation source and ensure the stable position of the measuring device;

[0048] The sleeve 2 is fixedly installed at the central position of the bottom end of the fixed seat 1 and is used to guide the scale rod 4;

[0049] The measuring mechanism includes a scale rod 4. One end of the scale rod 4 extends into the interior of the sleeve 2, and the scale rod 4 can axially move along the inner cavity of the sleeve 2;

[0050] The detecting mechanism includes a touch head 5. The touch head 5 is installed at the other end of the scale rod 4 and is used to contact the patient's skin surface to determine the position of the patient's skin surface.

[0051] This embodiment provides a source-skin distance measuring device that is easy to operate, ensures the accurate measurement of the source-skin distance, realizes stability and precision through a simple mechanical structure, and improves the safety of dose control in radiotherapy.

[0052] Embodiment 2:

[0053] On the basis of Embodiment 1, referring to Figures 2 - 6 , an annular installation part 201 is arranged on the outer side of the sleeve 2, and a plurality of installation holes 202 are opened on the installation part 201. A plurality of first threaded holes 102 adapted to the installation holes 202 are opened at the bottom end of the fixed seat 1;

[0054] The number of the mounting holes 202 and the first threaded holes 102 is two each;

[0055] The sleeve 2 is connected to the fixed seat 1 by positioning bolts passing through the mounting holes 202 and the first threaded holes 102, further enhancing the structural stability.

[0056] Furthermore, the fixed seat 1 is provided with a socket hole 101 in the vertical direction, and a portion of the sleeve 2 above the mounting portion 201 is inserted into the socket hole 101.

[0057] Furthermore, at least one second threaded hole 203 is formed in the side wall of the sleeve 2, and a knurled screw 3 is threadedly connected to the second threaded hole 203;

[0058] A limiting groove 401 is provided on one side wall of the scale rod 4, and the limiting groove 401 is a blind groove.

[0059] One end of the knurled screw 3 passes through the second threaded hole 203 and remains inserted into the limiting groove 401; a blind groove means that the opening of the groove does not penetrate the entire workpiece and only extends within a part of the depth of the workpiece, and the bottom of the groove is closed;

[0060] The knurled screw 3 is configured to be screwed into the second threaded hole 203 to adjust one end of the knurled screw 3 extending into the sleeve 2 to abut against the bottom of the limiting groove 401, and as the knurled screw 3 is continuously screwed in, the scale rod 4 is pressed against the inner wall of the sleeve 2; that is to say, by screwing in the knurled screw 3, the scale rod 4 can be fixed at the desired position.

[0061] Furthermore, a section of scale lines is provided on the scale rod 4, and the scales on the scale lines have added the distance from the radiation source to the bottom surface of the sleeve 2 on the basis of the distance from the bottom end of the touch head 5. The distance from the radiation source to the bottom surface of the sleeve 2 is a fixed value, so the source-skin distance can be directly read according to the scale lines;

[0062] The portion of the scale rod 4 below the scale lines is provided with a hollow structure, and the hollow structure is a weight-reducing cavity 402 to reduce the weight of the scale rod 4.

[0063] Furthermore, the touch head 5 adopts a spherical touch head or a flat touch head. Among them, the end of the spherical touch head contacting the patient's skin surface presents as a smooth sphere, and the end of the flat touch head contacting the patient's skin surface presents as a flat contact surface.

[0064] Furthermore, the touch head 5 is fixedly connected to the bottom end of the scale rod 4 by an adhesive method.

[0065] Furthermore, the outer surface of the scale rod 4 is provided with anti-slip lines.

[0066] Furthermore, the sleeve 2 is made of aluminum alloy, and the surface of the touch head 5 is covered with an antibacterial coating to reduce the risk of infection that may be caused during the measurement process.

[0067] In this embodiment, by adding structures such as the installation part 201, the limit groove 401, and the knurled screw 3, the stability, precision, and operation convenience of the device are enhanced, effectively solving the problems of easy displacement and instability of the measuring device, and further improving the measurement accuracy.

[0068] Embodiment 3:

[0069] The present utility model provides a technical solution:

[0070] A radiotherapy system, the radiotherapy system includes a manipulator 11, an accelerator 12, a treatment couch 14, and the aforementioned source-skin distance measuring device 13, wherein:

[0071] The accelerator 12 is fixedly installed at the end of the manipulator 11, and the accelerator 12 can be flexibly moved through the manipulator 11 and can be accurately positioned to the treatment area;

[0072] At least one secondary collimator mounting port 1201 is provided at the exit end of the radiation source of the accelerator 12, and the secondary collimator mounting port 1201 is configured to be able to install a secondary collimator 1202;

[0073] The size of the fixed seat 1 in the source-skin distance measuring device 13 is the same as that of the secondary collimator 1202, the fixed seat 1 is embedded and installed in the secondary collimator mounting port 1201, and the scale rod 4 in the source-skin distance measuring device 13 points to the treatment couch 14.

[0074] As Figures 7 - 10 shown, when it is necessary to measure the source-skin distance, move the accelerator 12 to the treatment position, remove the secondary collimator 1202 from the secondary collimator mounting port 1201; install the entire fixed seat 1 of the source-skin distance measuring device 13 into the secondary collimator mounting port 1201; loosen the knurled screw 3, move the touch head 5 to the patient's skin surface; read the scale of the scale rod 4, which is the distance from the radiation source to the skin surface, that is, the source-skin distance SSD.

[0075] The radiotherapy system in this embodiment integrates a source-skin distance measuring device, can quickly and accurately measure the source-skin distance, simplifies the traditional manual measurement process, and improves the accuracy and efficiency of treatment.

[0076] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A source-skin distance measuring device, characterized in that, The source-skin distance measuring device includes a positioning mechanism, a measuring mechanism, and a detecting mechanism connected in sequence, where: The positioning mechanism includes a fixed seat (1) and a sleeve (2). The fixed seat (1) is fixedly installed at the emitting end of the radiation source, and the sleeve (2) is fixedly installed at the central position of the bottom end of the fixed seat (1); The measuring mechanism includes a graduated rod (4). One end of the graduated rod (4) extends into the interior of the sleeve (2), and the graduated rod (4) can axially move along the inner cavity of the sleeve (2); The detecting mechanism includes a touch head (5). The touch head (5) is installed at the other end of the graduated rod (4) and is used to contact the patient's skin surface.

2. The source-skin distance measuring device according to claim 1, characterized in that, An annular mounting portion (201) is provided on the outer side of the sleeve (2). A plurality of mounting holes (202) are formed in the mounting portion (201), and a plurality of first threaded holes (102) adapted to the mounting holes (202) are formed at the bottom end of the fixed seat (1); The sleeve (2) is connected to the fixed seat (1) by positioning bolts passing through the mounting holes (202) and the first threaded holes (102).

3. The source-skin distance measuring device according to claim 2, wherein The fixed seat (1) is provided with a socket hole (101) in the vertical direction, and the portion of the sleeve (2) above the mounting portion (201) is inserted into the socket hole (101).

4. The source-skin distance measuring device according to claim 1, characterized in that At least one second threaded hole (203) is formed in the side wall of the sleeve (2), and a knurled screw (3) is threadedly connected to the second threaded hole (203); A limiting groove (401) is provided on the side wall of one side of the graduated rod (4). The limiting groove (401) is a blind groove, and one end of the knurled screw (3) passes through the second threaded hole (203) and remains extending into the limiting groove (401); The knurled screw (3) is configured to be able to be screwed into the second threaded hole (203) to adjust the end of the knurled screw (3) extending into the sleeve (2) to abut against the bottom of the limiting groove (401), and as the knurled screw (3) is continuously screwed in, the graduated rod (4) is pressed against the inner wall of the sleeve (2).

5. The source skin distance measuring device according to claim 1, characterized in that, A section of scale line is provided on the graduated rod (4). The portion of the graduated rod (4) below the scale line is provided with a hollow structure to reduce the weight of the graduated rod (4).

6. The source-skin distance measuring device according to claim 1, wherein The touch head (5) adopts a spherical touch head or a flat touch head.

7. The source-skin distance measuring device according to claim 1, wherein The touch head (5) is fixedly connected to the bottom end of the graduated rod (4) by an adhesive method.

8. The source-skin distance measuring device according to claim 1, characterized in that, The outer surface of the graduated rod (4) is provided with anti-slip patterns.

9. The source-skin distance measuring device according to claim 1, wherein The sleeve (2) is made of aluminum alloy, and the surface of the touch head (5) is covered with an antibacterial coating.

10. A radiotherapy system, characterized in that, The radiotherapy system includes a manipulator (11), an accelerator (12), a treatment bed (14), and the source-skin distance measuring device (13) according to any one of claims 1-9, where: The accelerator (12) is fixedly installed at the end of the manipulator (11). At least one secondary collimator mounting port (1201) is provided at the exit end of the radiation source of the accelerator (12), and the secondary collimator mounting port (1201) is configured to be able to mount a secondary collimator (1202); The size of the fixed seat (1) in the source-skin distance measuring device (13) is the same as that of the secondary collimator (1202). The fixed seat (1) is embedded and installed in the secondary collimator mounting port (1201), and the scale rod (4) in the source-skin distance measuring device (13) points to the treatment couch (14).

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