CN219607954U - High-efficient intelligent detection device of medical linear accelerator accuracy - Google Patents
High-efficient intelligent detection device of medical linear accelerator accuracy Download PDFInfo
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- CN219607954U CN219607954U CN202320222790.2U CN202320222790U CN219607954U CN 219607954 U CN219607954 U CN 219607954U CN 202320222790 U CN202320222790 U CN 202320222790U CN 219607954 U CN219607954 U CN 219607954U
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Abstract
The utility model provides a high-efficiency intelligent detection device for the accuracy of a medical linear accelerator, which comprises a base, a first photosensitive element, at least two groups of second photosensitive elements and an X-ray detection element, wherein the first photosensitive element is arranged on the base; the first photosensitive element and the second photosensitive element are arranged on the upper surface of the base, and the X-ray detection element is arranged inside the base. When the geometric accuracy of the accelerator is detected, the machine head is rotated around the vertical axis, and then the accelerator frame is rotated around the horizontal axis; in the process, if the dark area is overlapped with the plurality of groups of second photosensitive elements in sequence and the X-ray detection element always keeps the state of receiving the X-rays, the geometric accuracy of the linear accelerator is normal. The high-efficiency intelligent detection device for the accuracy of the medical linear accelerator can efficiently detect the geometric accuracy of the medical linear accelerator, avoid the manual operation of medical staff, improve the detection efficiency and ensure the reliability of the detection result.
Description
Technical Field
The utility model belongs to the technical field of medical instrument detection, and particularly relates to a high-efficiency intelligent detection device for the accuracy of a medical linear accelerator.
Background
The medical linear accelerator is a therapeutic instrument for killing tumor tissues by utilizing radioactive rays, and the light source part of the medical linear accelerator can correspondingly move along with the rotation or translation of a rack, and particularly: a common medical linac includes an automated drive member, and an accelerator housing coupled to the automated drive member; the automatic driving component can drive the accelerator rack to rotate around a horizontal shaft. The accelerator frame is also connected with a machine head and an image assembly which are distributed around the rotating shaft at intervals; the machine head is used for emitting visible light towards the accelerator rack rotating shaft and is suitable for rotating around the direction towards the accelerator rack rotating shaft; and the image component comprises an X-ray transmitting end and a receiving end which are symmetrically arranged at two sides of the rotating shaft of the accelerator frame. During the treatment, the patient lies on the surface of the treatment bed along the rotating axis of the accelerator rack, and the tumor part is positioned at the intersection of the visible light direction and the X-ray direction; at the moment, the accelerator rack is driven to rotate through the automatic driving component, and meanwhile, the machine head is driven to rotate, so that the irradiation of all parts of tumor tissues can be ensured.
Referring to fig. 1 and 2, the handpiece is coaxially provided with a light-transmitting member 2, and when the handpiece generates visible light, the light beam is projected outwards through the light-transmitting surface of the light-transmitting member 2; and, still be provided with cross light-absorbing layer 3 on the light-transmitting surface of printing opacity spare 2, this light-absorbing layer 3 adopts dark plastic film to make, is located the center department of light-transmitting surface for absorb the visible light through printing opacity spare 2, thereby can make the visible light center that passes through printing opacity spare 2 and cast form a cross dark space.
According to industry standard, the medical linear accelerator needs to detect mechanical geometric accuracy at proper frequency, and the existing detection mode is usually manual operation, and because the manual operation is affected in many aspects and has various error hidden dangers, the existing detection mode has the technical defects of low working efficiency and unreliable detection results.
Disclosure of Invention
The embodiment of the utility model provides a high-efficiency intelligent detection device for the accuracy of a medical linear accelerator, which aims to replace manual detection operation and solves the technical problems of low detection efficiency and unreliable detection results of the existing geometric accuracy.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the high-efficiency intelligent detection device for the accuracy of the medical linear accelerator comprises a base which is used for being fixed on the upper surface of a treatment bed; the base is used for receiving visible light projected from the machine head and X-rays projected from the X-ray emission end; its characterized in that, high-efficient intelligent detection device still includes:
the first photosensitive element is arranged on the upper surface of the base and is used for coinciding with the center of a dark area of visible light;
at least two groups of second photosensitive elements are arranged on the upper surface of the base; each group of second photosensitive elements comprises four second photosensitive elements which are distributed around the first photosensitive element at equal angle intervals, and the four second photosensitive elements are respectively used for coinciding with four strip-shaped areas which extend outwards from the center of the dark area; and
an X-ray detection element, which is arranged inside the base and is used for detecting X-rays; and, the X-ray detection element is adapted to receive X-rays when the first photosensitive element coincides with the center of the dark region;
when the first photosensitive element is overlapped with the center of the dark area of the visible light, the machine head is rotated around the vertical axis, so that the dark area is overlapped with two or more groups of corresponding second photosensitive elements; and, defining the length direction of the treatment couch as the front-back direction, rotating the accelerator frame around the horizontal axis of the front-back direction, the X-ray detection element being capable of holding X-rays received from the accelerator frame and the accelerator-attached imaging system.
In one possible implementation, the X-ray detection element includes:
the upper shell is made of polyethylene material, and a first arc-shaped groove is formed in the lower side surface of the upper shell;
the lower shell is made of polyethylene material, is suitable for being abutted with the lower side face of the upper shell, and is provided with a second arc-shaped groove on the upper side face; and
the ball body is made of low-density metal materials and is used for receiving X rays;
when the upper shell is connected with the lower shell, the first arc-shaped groove and the second arc-shaped groove are combined to form a spherical cavity which is suitable for embedding the sphere and also suitable for limiting the sphere; the lower surface of the base has a receiving groove adapted to be inserted by the combined structure of the upper case and the lower case.
In one possible implementation manner, the opening of the accommodating groove is provided with an inward bulge and an elastic limiting ring for abutting against the lower end face of the lower shell.
In one possible implementation manner, the medical linear accelerator accuracy high-efficiency intelligent detection device further comprises:
the vertical distance measuring assembly is arranged on the base and used for detecting the vertical distance between the base and the accelerator machine head.
In one possible implementation, the vertical ranging assembly includes:
at least two laser range finders are arranged on the upper surface of the base and are distributed around the first photosensitive elements at equal intervals.
In one possible implementation manner, the medical linear accelerator accuracy high-efficiency intelligent detection device further comprises:
the two groups of transverse distance measuring assemblies are respectively arranged at the left side and the right side of the base and are used for respectively detecting the horizontal distance between the base and the inner walls at the left side and the right side of the treatment room; or when the accelerator frame rotates to face the left and right directions, one of the transverse distance measuring assemblies is used for measuring the horizontal distance between the base and the accelerator machine head.
In one possible implementation manner, the left side surface and the right side surface of the base are connected with third photosensitive elements; when the accelerator frame rotates to face the left and right directions, the third photosensitive element is used for receiving visible light generated by the accelerator and coincides with the center of the dark area.
In one possible implementation, the base further includes:
at least three supporting legs are fixedly connected to the lower surface of the base and extend from top to bottom; each supporting leg is in threaded connection with a screw rod which is suitable for screwing in an up-down direction relative to the supporting leg.
In one possible implementation, the first photosensitive element and the second photosensitive element are both photosensitive sensors.
In the embodiment of the utility model, when the geometric accuracy detection of the medical linear accelerator is carried out, a dark area formed by visible light can be projected onto the base by moving the treatment bed, and the center of the dark area is overlapped with the first photosensitive element, so that the positioning between the machine head and the treatment bed is realized.
In the geometric accuracy detection process of the medical linear accelerator, firstly, a machine head is utilized to emit visible light, then the machine head is rotated by taking a vertical axis as a central axis, so that a dark area is sequentially overlapped with two or more groups of corresponding second photosensitive elements, and the accuracy of the medical linear accelerator in rotation or change of the radiation field or movement of a treatment bed is judged according to the dark area (if the dark area cannot be sequentially overlapped with the second photosensitive elements, the accuracy is poor); then, X-rays are emitted by the machine head and the image component, and the machine frame rotates around the horizontal axis in the front-rear direction as the central axis, so that the X-rays continuously pass through the X-ray detection element, and the accuracy and consistency of the image component when the X-rays are rotated by the linear accelerator are judged (if the X-rays cannot be detected by the X-ray detection element, the accuracy is poor).
Compared with the prior art, the high-efficiency intelligent detection device for the accuracy of the medical linear accelerator can efficiently detect the geometric accuracy of the medical linear accelerator, and the reliability of detection results is guaranteed.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional structure of a high-efficiency intelligent detection device for accuracy of a medical linear accelerator according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram showing a second perspective structure of a high-efficiency intelligent detection device for accuracy of a medical linear accelerator according to an embodiment of the present utility model;
FIG. 3 is a schematic view of an exploded structure of a base and an X-ray detecting element employed in the present utility model;
FIG. 4 is a schematic diagram of an exploded structure of an X-ray detector element used in the present utility model;
reference numerals illustrate: 1. a base; 11. a receiving groove; 12. an elastic limit ring; 13. a support leg; 131. a screw rod; 2. a light transmitting member; 3. a light absorbing layer; 4. a first photosensitive element; 5. a second photosensitive element; 6. an X-ray detection element; 61. an upper housing; 611. a first arc-shaped groove; 62. a lower housing; 621. a second arc-shaped groove; 63. a sphere; 7. a laser range finder; 8. a lateral ranging assembly; 9. and a third photosensitive element.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 4, a description will now be made of an accuracy efficient intelligent detection device for a medical linear accelerator according to the present utility model. The utility model provides a high-efficiency intelligent detection device for the accuracy of a medical linear accelerator, which comprises a base 1, a light-transmitting piece 2, a light-absorbing layer 3, a first photosensitive element 4, at least two groups of second photosensitive elements 5 and an X-ray detection element 6.
It should be noted that, in this embodiment, for convenience of description, the length direction of the treatment couch (the height direction of the patient when the patient is lying on the treatment couch) is defined as the front-back direction, and the direction of the treatment couch toward the medical linac body is the back-to-front direction.
The base 1 is used for being fixed on the upper surface of the treatment bed and is positioned at the front end of the upper surface of the treatment bed, and the accelerator rack on the medical linear accelerator is rotated to be right above the base 1.
The first photosensitive element 4 is arranged on the upper surface of the base 1 and is used for coinciding with the center of the dark area; when the first photosensitive element 4 coincides with the dark area, the photosensitive change can be displayed as data, thereby enabling the operator to receive accurate position information.
At least two groups of second photosensitive elements 5 are arranged on the upper surface of the base 1; in the present embodiment, the second photosensitive elements 5 have two groups.
Each set of second photosensitive elements 5 includes four second photosensitive elements 5 distributed at equal angular intervals around the first photosensitive element 4 (that is, two adjacent second photosensitive elements 5 are at right angles to the line connecting the first photosensitive elements 4 in the direction around the first photosensitive element 4), and the four second photosensitive elements 5 are respectively used for overlapping with four stripe-shaped areas extending outwards from the center of the dark area. When the first photosensitive element 4 is overlapped with the center of the dark area, the machine head is rotated around the vertical axis, so that the dark area is overlapped with two or more groups of corresponding second photosensitive elements 5 successively.
An X-ray detection element 6 is provided inside the base 1 for detecting X-rays; and, the X-ray detecting element 6 is adapted to receive X-rays emitted by the accelerator frame when the first photosensitive element 4 coincides with the center of the dark space. By adjusting the accelerator treatment table or the X-ray detection element 6 in the up-down direction, when the X-ray detection element 6 is positioned on the axis along which the accelerator frame rotates in the front-rear direction, the accelerator frame is rotated about the horizontal axis in the front-rear direction, and the X-ray detection element 6 can hold the X-rays received from the accelerator frame and the imaging assembly.
In the embodiment of the utility model, when the geometric accuracy of the medical linear accelerator is detected, the dark area can be moved to the base 1 by rotating the accelerator frame or moving the treatment bed, and the center of the dark area is overlapped with the first photosensitive element 4, so that the positioning between the accelerator frame and the treatment bed is realized.
In the geometric accuracy detection process of the medical linear accelerator, firstly, an accelerator machine head is utilized to emit visible light, then the machine head is rotated by taking a vertical axis as a central axis, so that a dark area is sequentially overlapped with two or more groups of corresponding second photosensitive elements 5, and the accuracy of the medical linear accelerator in rotation or change of the radiation field or movement of a treatment bed is judged according to the dark area (if the dark area cannot be sequentially overlapped with the second photosensitive elements 5, the accuracy is poor); then, the accelerator frame and the accelerator-attached imaging system are used to emit X-rays, and the accelerator frame is rotated about the horizontal axis in the front-rear direction as the central axis, so that the X-rays continuously pass through the X-ray detecting element 6, and the accuracy and consistency of the imaging device when the rotation has been performed by the linac are determined (the accuracy is poor if the X-ray detecting element 6 fails to detect the X-rays).
Compared with the prior art, the high-efficiency intelligent detection device for the accuracy of the medical linear accelerator can efficiently detect the geometric accuracy of the medical linear accelerator, and the reliability of detection results is ensured; in actual operation, the original quality control project for two hours can be shortened to fifteen minutes, and an analysis result is effectively provided.
In some embodiments, referring to fig. 3 and 4, the x-ray detection element 6 includes an upper housing 61, a lower housing 62, and a sphere 63.
The upper housing 61 is made of polyethylene material, is suitable for X-rays to pass through, and has a first arc-shaped groove 611 formed on its lower side.
The lower housing 62 is also made of polyethylene and is adapted to allow X-rays to pass therethrough.
The lower housing 62 is adapted to abut against the lower side of the upper housing 61, and has a second arc-shaped slot 621 formed in its upper side.
The sphere 63 is made of a low density metal material for receiving X-rays.
Wherein, when the upper shell 61 and the lower shell 62 are connected, the first arc-shaped groove 611 and the second arc-shaped groove 621 are combined to form a spherical cavity suitable for embedding the sphere 63 and also suitable for limiting the sphere 63; the lower surface of the base 1 has a receiving groove 11 adapted to be fitted with a combined structure of the upper case 61 and the lower case 62.
In some embodiments, the feature receiving groove 11 may have a structure as shown in fig. 2 and 3. Referring to fig. 2 and 3, the opening of the accommodating groove 11 is provided with an inward bulge and an elastic limiting ring 12 for abutting against the lower end surface of the lower housing 62, and the lower housing 62 can be effectively prevented from being separated from the accommodating groove 11 by the elastic limiting ring 12.
It should be noted that, as shown in fig. 4, the lower end of the lower housing 62 has a protrusion adapted to be opened through the receiving groove 11 and adapted to be flush with the lower surface of the base 1; the horizontal flatness of the surface of the base 1 is ensured by utilizing the matching of the protruding part and the lower surface of the base 1.
In some embodiments, referring to fig. 1, the high-efficiency intelligent detection device for the accuracy of the medical linear accelerator further comprises a vertical distance measuring component arranged on the base 1 and used for detecting the vertical distance between the base 1 and the accelerator head, so that the relative distance between a measuring point and the accelerator head can be conveniently measured, detection by tools such as a ruler is avoided, and the measurement efficiency of the accelerator frame is improved.
In some embodiments, the above-described feature vertical ranging assembly may take the configuration shown in fig. 1. Referring to fig. 1, the vertical ranging assembly includes at least two laser rangefinders 7, and is equally spaced around the first photosensitive element 4.
In the present embodiment, the laser rangefinder 7 has two, two laser rangefinders 7 are disposed on the upper surface of the base 1, and are distributed on the outer side of the second photosensitive element 5 along the front-rear direction (the purpose of this design is to avoid the influence of the refracted light on the surface of the laser rangefinder 7 on the normal use of the second photosensitive element 5). In addition, in the present embodiment, the laser range finder 7 has a numerical screen display function so as to facilitate manual regulation.
The two laser rangefinders 7 are designed because the upper surface of the base 1 can be judged whether to keep stable or not by the readings of the two laser rangefinders, and the two readings are compared to obtain a more accurate vertical distance value.
In some embodiments, referring to fig. 1 and 2, the medical linac accuracy high-efficiency intelligent detection device further comprises two sets of lateral ranging assemblies 8.
Wherein, two groups of transverse distance measuring components 8 are respectively arranged at the left side and the right side of the base 1, and respectively detect the horizontal distance between the base 1 and the inner walls at the left side and the right side of the treatment room; in actual operation, electronic components suitable for being matched with the transverse distance measuring assembly 8 can be loaded on the left side and the right side of the treatment room in advance, so that the stability of distance measuring operation of the transverse distance measuring assembly 8 is ensured.
Or, when the accelerator frame rotates to the left-right direction, one of the lateral distance measuring assemblies 8 is used for measuring the horizontal distance between the base 1 and the accelerator frame, so that the geometric accuracy of the accelerator frame when rotating along the horizontal axis in the front-rear direction is judged by comparing the vertical distance obtained by the lateral distance measuring assemblies with the vertical distance measuring assemblies.
In the present embodiment, the lateral distance measuring assembly 8 specifically refers to a single laser distance measuring device 7.
In some embodiments, the feature base 1 may have a structure as shown in fig. 1 and 2. Referring to fig. 1 and 2, a third photosensitive element 9 is connected to both left and right sides of the base 1; the third photosensitive element 9 is used for receiving visible light generated by the accelerator frame when the accelerator frame rotates to face the left and right directions and coincides with the center of the dark area; that is, the third photosensitive element 9 is on an axis parallel to the left-right direction with the first photosensitive element 4.
In some embodiments, the feature base 1 may have a structure as shown in fig. 1 and 2. Referring to fig. 1 and 2, the base 1 further comprises at least three legs 13; in the present embodiment, the legs 13 have four.
The plurality of legs 13 are fixedly connected to the lower surface of the base 1, and each leg 13 extends from top to bottom; each leg 13 is screwed with a screw rod 131 adapted to screw in the up-down direction with respect to itself, and by screwing the screw rod 131 in the up-down direction, the position change of the base 1 in the up-down direction is achieved.
In the present embodiment, a synchronization structure is provided between the plurality of lead screws 131 so that the height of each leg 13 and the lead screw 131 is the same, thereby ensuring that the upper surface of the base 1 is adjusted to a horizontal state. In addition, the base 1 is provided with a device for automatically measuring the level (such as a level meter), thereby ensuring that the upper surface of the base 1 is maintained in a level state.
In some embodiments, the above-described features of the first photosensitive element 4 and the second photosensitive element 5 may take the configuration shown in fig. 1. Referring to fig. 1, the first photosensitive element 4 and the second photosensitive element 5 are each a photosensitive sensor.
It should be noted that, as shown in fig. 1 and 2, the third photosensitive element 9 is also a photosensitive sensor.
The above description is merely illustrative of the preferred embodiments of the present utility model and should not be taken as limiting the utility model, but all modifications, equivalents, improvements and changes within the spirit and principles of the utility model are intended to be included within the scope of the present utility model.
Claims (9)
1. The high-efficiency intelligent detection device for the accuracy of the medical linear accelerator comprises a base which is used for being fixed on the upper surface of a treatment bed; the base is used for receiving visible light projected from the machine head and X-rays projected from the X-ray emission end; its characterized in that, high-efficient intelligent detection device still includes:
the first photosensitive element is arranged on the upper surface of the base and is used for coinciding with the center of a dark area of visible light;
at least two groups of second photosensitive elements are arranged on the upper surface of the base; each group of second photosensitive elements comprises four second photosensitive elements which are distributed around the first photosensitive element at equal angle intervals, and the four second photosensitive elements are respectively used for coinciding with four strip-shaped areas which extend outwards from the center of the dark area; and
an X-ray detection element, which is arranged inside the base and is used for detecting X-rays; and, the X-ray detection element is adapted to receive X-rays when the first photosensitive element coincides with the center of the dark region;
when the first photosensitive element is overlapped with the center of the dark area of the visible light, the machine head is rotated around the vertical axis, so that the dark area is overlapped with two or more groups of corresponding second photosensitive elements; and, defining the length direction of the treatment couch as the front-back direction, rotating the accelerator frame around the horizontal axis of the front-back direction, the X-ray detection element being capable of holding X-rays received from the accelerator frame and the accelerator-attached imaging system.
2. The medical linac accuracy high-efficiency intelligent detection device according to claim 1, wherein said X-ray detection element comprises:
the upper shell is made of polyethylene material, and a first arc-shaped groove is formed in the lower side surface of the upper shell;
the lower shell is made of polyethylene material, is suitable for being abutted with the lower side face of the upper shell, and is provided with a second arc-shaped groove on the upper side face; and
the ball body is made of low-density metal materials and is used for receiving X rays;
when the upper shell is connected with the lower shell, the first arc-shaped groove and the second arc-shaped groove are combined to form a spherical cavity which is suitable for embedding the sphere and also suitable for limiting the sphere; the lower surface of the base has a receiving groove adapted to be inserted by the combined structure of the upper case and the lower case.
3. The high-efficiency intelligent detection device for the accuracy of the medical linear accelerator according to claim 2, wherein the opening of the accommodating groove is provided with an inward bulge and an elastic limiting ring for abutting against the lower end face of the lower shell.
4. The medical linac accuracy high-efficiency intelligent detection device according to claim 1, wherein the medical linac accuracy high-efficiency intelligent detection device further comprises:
the vertical distance measuring assembly is arranged on the base and used for detecting the vertical distance between the base and the accelerator machine head.
5. The high-efficiency intelligent detection device for accuracy of a medical linac according to claim 4, wherein said vertical ranging assembly comprises:
at least two laser range finders are arranged on the upper surface of the base and are distributed around the first photosensitive elements at equal intervals.
6. The medical linac accuracy high-efficiency intelligent detection device according to claim 1, wherein the medical linac accuracy high-efficiency intelligent detection device further comprises:
the two groups of transverse distance measuring assemblies are respectively arranged at the left side and the right side of the base and are used for respectively detecting the horizontal distance between the base and the inner walls at the left side and the right side of the treatment room; or when the accelerator frame rotates to face the left and right directions, one of the transverse distance measuring assemblies is used for measuring the horizontal distance between the base and the accelerator machine head.
7. The high-efficiency intelligent detection device for the accuracy of the medical linear accelerator according to claim 1, wherein the left and right sides of the base are connected with third photosensitive elements; when the accelerator frame rotates to face the left and right directions, the third photosensitive element is used for receiving visible light generated by the accelerator and coincides with the center of the dark area.
8. The medical linac accuracy high-efficiency intelligent detection device according to claim 1, wherein said base further comprises:
at least three supporting legs are fixedly connected to the lower surface of the base and extend from top to bottom; each supporting leg is in threaded connection with a screw rod which is suitable for screwing in an up-down direction relative to the supporting leg.
9. The medical linear accelerator accuracy high-efficiency intelligent detection device according to any one of claims 1-8, wherein the first photosensitive element and the second photosensitive element are photosensitive sensors.
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