WO2021073540A1

WO2021073540A1 - Field verification device and radiotherapy system

Info

Publication number: WO2021073540A1
Application number: PCT/CN2020/120944
Authority: WO
Inventors: 唐子明; 曹延龙
Original assignee: 深圳市奥沃医学新技术发展有限公司
Priority date: 2019-10-16
Filing date: 2020-10-14
Publication date: 2021-04-22
Also published as: CN211584937U

Abstract

Disclosed are a field verification device and a radiotherapy system, relating to the field of radiotherapy. Two calibration lines are provided on a first surface of a main body of the field verification device, and a second surface is provided with a verification component comprising verification metal wires, wherein the two calibration lines can align the field verification device with the isocenter of a radiotherapy device, so as to ensure that the imaging of the verification component on an imaging component can indicate a desired field. Verification personnel can directly verify whether the position of the field of a beam is accurate according to the deviation between the imaging of an actual field on the imaging component and the imaging of the verification component obtained by comparison. The accuracy is high when field verification is performed by using the field verification device.

Description

Field verification device and radiotherapy system

This application claims the priority of the Chinese patent application filed on October 16, 2019 with the application number 201921741370.5 and the utility model titled "Field Verification Device and Radiotherapy System", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of radiotherapy, and in particular to a field verification device and a radiotherapy system.

Background technique

The radiation field (ie, radiation field) of the radiotherapy equipment refers to the projection of the beam on the central plane of the radiotherapy equipment, and its outline represents the radiation range. In the process of radiotherapy, if the actual radiation range is inconsistent with the expected radiation range, the beam of the radiotherapy equipment cannot accurately irradiate the target area, and may even radiate to normal tissues, causing damage to normal tissues. For this reason, before radiotherapy, the field of radiotherapy equipment needs to be verified.

In the related art, the light field generated by the light field indicator is generally used to indicate the shooting field, and then whether the position of the shooting field is accurate can be verified according to the position of the light field.

Utility model content

This application provides a field verification device and a radiotherapy system, and the technical solutions are as follows:

In one aspect, a field verification device is provided, and the field verification device includes:

A main body, the main body has a first surface and a second surface opposite to each other, and two calibration lines intersecting perpendicularly are arranged on the first surface;

At least one verification component is arranged on the second surface, each of the verification components includes one or more verification metal lines, and the center point of the figure enclosed by the one or more verification metal lines is on the first The orthographic projection on the surface coincides with the intersection of the two calibration lines.

Optionally, the field verification device further includes: a first reference metal wire and a second reference metal wire arranged on the second surface;

The first reference metal line and the second reference metal line intersect vertically, and the intersection point of the first reference metal line and the second reference metal line coincides with the center point.

Optionally, each verification component includes four verification metal wires;

Two of the verification metal lines are perpendicular to the first reference metal line, and the other two verification metal lines are perpendicular to the second reference metal line.

Optionally, the orthographic projection of the first reference metal wire on the first surface coincides with one of the calibration lines, and the orthographic projection of the second reference metal wire on the first surface coincides with the other orthographic projection on the first surface. The calibration lines coincide.

Optionally, a groove is further provided on the second surface, and each of the verification metal wire, the first reference metal wire and the second reference metal wire are all arranged in the groove.

Optionally, one or more card slot groups are further provided on the second surface; each of the card slot groups includes: two card slots arranged symmetrically along the center point for clamping the film.

Optionally, two card slot groups are provided on the second surface, and the two card slots included in each card slot group are strip-shaped and parallel to each other; one of the card slot groups includes The two card slots are perpendicular to the first reference metal line on the second surface, and the two card slots included in the other card slot group are both perpendicular to the second surface on the second surface. Refer to the metal wire.

Optionally, the first surface and the second surface are both cross-shaped; the center point of the figure coincides with the center point of the second surface.

Optionally, four scale line groups are further provided on the first surface, two of the scale line groups correspond to one of the calibration lines, and the other two scale line groups are associated with the other calibration line. correspond;

The multiple scale lines included in each of the scale line groups are arranged along the extension direction of the corresponding one of the calibration lines with the intersection of the two calibration lines as the origin, and two corresponding to the same calibration line The arrangement directions of each of the scale line groups are opposite.

Optionally, each of the scale line groups includes a plurality of discontinuous sub scale line groups; the number of the sub scale line groups included in each of the scale line groups is the same, and the scale range is the same.

Optionally, on the first surface, the area where each of the sub-scale line groups is located is also calibrated with a scale value.

Optionally, the material of the main body is aluminum, aluminum alloy or hard plastic; the materials of the verification metal wire, the first reference metal wire and the second reference metal wire are tungsten alloy or lead alloy.

In another aspect, a radiotherapy system is provided, including: radiotherapy equipment, a treatment bed, and the field verification device as described in the foregoing aspect;

Wherein, the radiation field verification device is arranged on the treatment bed, and the second side of the main body of the radiation field verification device faces the treatment bed.

Optionally, the frame of the radiotherapy equipment is a drum; the radiotherapy system further includes: a camera device arranged in the drum.

Optionally, the system further includes: two laser lights, one of the laser lights is arranged on the side of the entrance of the drum, and is used to emit laser lines in a direction perpendicular to the axis of the drum, and the other laser light It is arranged at a position opposite to the entrance of the drum, and is used to emit a laser line in a direction coincident with the axis of the drum.

Optionally, the system further includes: an imaging component; the imaging component is a film or an electronic portal imaging device (EPID).

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

FIG. 1 is a schematic structural diagram of a field verification device provided by an embodiment of the present application;

2 is a schematic diagram of the second side of a main body provided by an embodiment of the present application;

Figure 3 is a schematic diagram of a radiotherapy system provided by an embodiment of the present application;

4 is a schematic diagram of the second side of another main body provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another field verification device provided by an embodiment of the present application;

Figure 6 is a cross-sectional view of a main body provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a structure with a film fixed on the second side of the main body according to an embodiment of the present application; FIG.

FIG. 8 is a schematic diagram of the first side of a main body provided by an embodiment of the present application;

Fig. 9 is a schematic structural diagram of another radiotherapy system provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below with reference to the accompanying drawings.

The embodiment of the present application provides a radiation field verification device, which can be used to verify the radiation field of the radiotherapy equipment in a radiotherapy system, and the verification accuracy thereof is relatively high. Fig. 1 is a schematic structural diagram of a field verification device provided by an embodiment of the present application. As shown in Fig. 1, the field verification device may include:

The main body 01 has a first surface 011 and a second surface 012 opposite to each other (not shown in FIG. 1), and two calibration lines 01a intersecting perpendicularly are provided on the first surface 011. Wherein, the first surface 011 and the second surface 012 may be parallel to each other. Each calibration line 01a can be formed by an engraving (for example, laser engraving) process, a printing process, or a line attaching process.

Fig. 2 is a schematic diagram of a second side of a main body provided by an embodiment of the present application. As can be seen with reference to FIG. 2, the field verification device may further include: a verification component 02 arranged on the second surface 012. The verification component 02 may be at least one, and at least one may refer to one or more. One verification component 02 is exemplarily shown in FIG. 2.

Wherein, each verification component 02 may include one or more verification metal lines 021, the orthographic projection of the center point A of the figure enclosed by the one or more verification metal lines 021 on the first surface 011 and two calibration lines The intersection point B of 01a coincides.

Optionally, if the graphic enclosed by the one or more verification metal lines 021 is a center symmetric graphic, the center point of the graphic may refer to the symmetric center of the graphic. If the graphic enclosed by the one or more verification metal lines 021 is a non-centrosymmetric graphic, the center point of the graphic may refer to the center of the smallest circumscribed circle of the graphic.

In the embodiment of the present application, the verification metal wire 021 may be made of a heavy metal material that has a relatively high density and can be imaged on an imaging component (such as film or EPID) after being irradiated by beams such as X beams or gamma beams. to make. For example, it can be made of materials such as tungsten alloy or lead alloy. In addition, the pattern enclosed by the one or more verification metal wires 021 can be designed according to the shape and size of the radiation field (that is, the ideal radiation field) expected to be formed by the radiotherapy equipment. That is, according to the desired shape and size of the field, the position of each verification metal line 021 on the second surface 012 can be designed, and the length of the verification metal line 021 and the distance from the center point A can be designed so that the one Or a figure enclosed by a plurality of the verification metal lines 021 can indicate a desired field.

Generally, the desired field can be a centrally symmetrical figure. For example, it may be a square, and the size of the square may be 5 centimeters (cm)×5 cm, 10 cm×10 cm, 20 cm×20 cm, or 30 cm×30 cm. Correspondingly, referring to FIG. 2, each verification component 02 may include four verification metal wires 021 of equal length, and the four verification metal wires 021 may be enclosed in a square.

Taking the imaging component as a film as an example, the use process of the field verification device provided in the embodiment of the present application will be described:

In the first step, the film is fixed on the second side 012 of the main body 01, and then the second side 012 of the main body 01 faces the treatment bed, and the field verification device fixed with the film is placed on the treatment bed.

The second step is to adjust the position of the field verification device so that the two calibration lines 01a on the first surface 011 of the main body 01 are aligned with the cross lines of the laser light.

By way of example, FIG. 3 is a schematic diagram of a radiotherapy system provided by an embodiment of the present application. As shown in FIG. 3, the radiotherapy system may include a radiotherapy device 10, a treatment bed 20, and two laser lamps arranged in a treatment room. 30. The frame of the radiotherapy equipment 10 may be a drum, and one of the two laser lights 30 may be arranged on the side of the entrance of the drum, and can emit laser lines in a direction perpendicular to the axis of the drum. Another laser light 30 may be arranged at a position opposite to the entrance of the drum, and can emit a laser line in a direction coincident with the axis of the drum. The intersection of the two laser lines forms the crosshair of the laser light. When adjusting the position of the field verification device, the two calibration lines 01a on the first surface 011 of the main body 01 can be aligned with the laser light cross line.

At this time, there is a preset positional relationship between the intersection B of the two calibration lines 01a on the first surface 011 of the main body 01 and the isocenter of the radiotherapy equipment. That is, at this time, the distance between the intersection point B and the isocenter of the radiotherapy device is the preset distance.

The third step is to adjust the position of the treatment bed so that the intersection point B on the first surface 011 of the main body 01 of the field verification device coincides with the isocenter of the radiotherapy equipment.

For example, the treatment bed can be pushed into the drum according to the above-mentioned preset position relationship. For example, the treatment bed can be pushed into the drum by the preset distance, so that the intersection point B of the two calibration lines 01a on the first surface 011 of the main body 01 coincides with the isocenter of the radiotherapy equipment.

The fourth step is to adjust the position of the field forming component of the radiotherapy equipment according to the desired field, and control the beam from the treatment hair.

The beam from the treatment hair can be imaged on the film after passing through the field forming components (including the diaphragm and the multi-leaf collimator, etc.) and the field verification device. The imaging on the film may include the imaging of the actual field formed by the beam passing through the field forming component, and the imaging of the figure enclosed by each verification component 02 in the field verification device.

The fifth step is to verify the field of radiotherapy equipment based on the imaging on the film.

Since the figure enclosed by the verification metal wire in the verification component 02 is the shape of the desired radiation field, the radiation treatment can be verified by comparing the actual radiation field imaging on the film and the imaging deviation of the figure surrounded by the verification component Whether the position of the field of the equipment is accurate, that is, verify whether the field forming components such as the multi-leaf collimator and the diaphragm are normal. When it is verified that the position of the radiation field of the radiotherapy equipment is inaccurate, the verification personnel can also adjust the position of the multi-leaf collimator and/or the diaphragm according to the deviation, thereby calibrating the position of the radiation field of the radiotherapy equipment.

Optionally, after the above-mentioned second step and before the third step, the verifier can also place a solid water phantom on the first surface 011 of the main body 01 of the field verification device. The solid water phantom may be a solid phantom formed of a material whose mass density, electron density, and effective atomic number are almost equal to those of water. The solid water phantom can effectively reduce the scattering of the beam, make the image on the film sharper, and the edge of the image is clearer, thereby facilitating the verification personnel to observe the deviation, and improving the efficiency and accuracy of verification.

In summary, the embodiment of the present application provides a field verification device. The first surface of the main body of the field verification device is provided with two calibration lines, and the second surface is provided with a verification component including a verification metal wire. Wherein, the two calibration lines can align the field verification device with the isocenter of the radiotherapy equipment, so as to ensure that the imaging of the verification component on the imaging component can indicate the desired field. Verifiers can directly compare the actual field imaging on the imaging component and the imaging deviation of the verification component to verify whether the position of the beam’s field is accurate, and the accuracy of the field verification device using the field verification device Higher.

Optionally, in this embodiment of the application, multiple verification components 02 may be provided on the second surface 012 of the main body 01 in the field verification device. The shapes of the graphics enclosed by the multiple verification components 02 can be different, and/or the sizes can be different, so that the verification of different shapes and sizes of fields can be realized.

For example, the figures enclosed by the multiple verification components 02 may all be squares, and the side lengths of the squares enclosed by the verification components 02 may be different.

FIG. 4 is a schematic diagram of the second surface of another main body provided by an embodiment of the present application. As shown in FIG. 4, the field verification device may further include: a first reference metal wire 03 arranged on the second surface 012 And the second reference metal line 04. The first reference metal line 03 and the second reference metal line 04 intersect perpendicularly, and the intersection of the first reference metal line 03 and the second reference metal line 04 coincides with the center point A.

In the embodiment of the present application, each of the first reference metal wire 03 and the second reference metal wire 04 may also have a higher density and be irradiated by beams such as X beams or gamma beams. It is made of metal material that can be imaged on the imaging component. In addition, in order to simplify the manufacturing process, the reference metal wire and the verification metal wire can be made of the same material. For example, the reference metal wire and the verification metal wire may both be metal wires made of tungsten alloy or both metal wires made of lead alloy.

By arranging the first reference metal line 03 and the second reference metal line 04 that intersect perpendicularly, it can be ensured that after the beam passes through the field forming component and the field verification device and irradiates the imaging component, the imaging on the imaging component also includes the second reference metal line. The imaging of a reference metal line 03 and a second reference metal line 04. The imaging of the first reference metal line 03 and the second reference metal line 04 on the imaging component can be used as the coordinate axis of the imaging of the actual field and the imaging of the verification component 02, so that the verification personnel can observe the imaging of the actual field and the Verify the deviation of the imaging of the component 02 to further improve the efficiency and accuracy of the verification.

Optionally, referring to FIG. 2 and FIG. 4, each verification component 02 may include four verification metal wires 021. For example, four verification components 02 are shown in FIG. 4, where the first verification component 02 includes four verification metal wires 021a, the second verification component 02 includes four verification metal wires 021b, and the third verification component 02 includes four verification wires. The metal wire 021c, and the fourth verification component 02 includes four verification metal wires 021d.

As shown in FIG. 4, the two verification metal lines 021 in each verification component 02 may be perpendicular to the first reference metal line 03, and are arranged symmetrically on both sides of the center point A. The other two verification metal lines 021 can be perpendicular to the second reference metal line 04 and arranged symmetrically on both sides of the center point A.

Or it can be understood that the center point A can divide the first reference metal line 03 and the second reference metal line 04 into four semi-axes, up, down, left, and right, and each verification component 02 includes four verification metal lines In 021, each verification metal line 021 perpendicularly intersects with one of the semi-axes, and the distance between the four verification metal lines 021 and the center point A is equal.

For example, as shown in FIG. 4, among the four verification components 02 set on the second surface 012 of the main body 01, the distance d1 between each verification metal wire 021a in the first verification component 02 and the center point A can be 25 millimeters (mm), the size of the expected field enclosed by the first verification component 02 is 5 cm×5 cm. The distance d2 between each verification metal wire 021b in the second verification component 02 and the center point A may be 50 mm, and the size of the expected field enclosed by the second verification component 02 is 10 cm×10 cm. The distance d3 between each verification metal wire 021c in the third verification component 02 and the center point A may be 100 mm, and the size of the expected field enclosed by the third verification component 02 is 20 cm×20 cm. The distance d4 between each verification metal wire 021d in the fourth verification component 02 and the center point A may be 150 mm, and the size of the expected field enclosed by the fourth verification component 02 is 30 cm×30 cm.

In the embodiment of the present application, the orthographic projection of the first reference metal line 03 on the first surface 011 may coincide with a calibration line 01a, and the orthographic projection of the second reference metal line 04 on the first surface 011 may be It coincides with the other calibration line 01a. Thus, the symmetry of the overall structure of the main body 01 can be ensured.

Optionally, as shown in FIGS. 1, 2 and 4, the first surface 011 and the second surface 012 of the main body 01 may both be cross-shaped, that is, the main body 01 may have a cross-cube structure. In addition, the center point A of the figure enclosed by each verification component 02 may coincide with the center point of the second surface 012.

In the embodiment of the present invention, the cross cube can be divided into four semi-axes with the center point of any one of the first surface and the second surface as the origin. The length of the four semi-axes can be equal, the width can be equal, and the thickness can also be equal. That is, the dimensions of the cross shape of the first surface 011 and the second surface 012 are the same, and they are both centrally symmetrical.

For example, referring to FIG. 1, the length l of the main body 01 may be 320 mm, the width w may be 30 mm, and the thickness h may be 6 mm. Wherein, the length of the main body 01 may refer to the sum of the lengths of two collinear semi-axes among the four semi-axes, and the width w may refer to the width of any semi-axes. The length direction and the width direction of the main body 01 are parallel to the first surface 011 (or the second surface 012), and the thickness direction is perpendicular to the first surface 011 (or the second surface 012).

By designing the main body 01 as a cross cube structure, the volume of the main body 01 can be reduced under the premise that the calibration line 01a, the verification component 02 and the reference metal line can be effectively arranged, thereby effectively reducing the obstruction of the main body 01 to the beam And interference, and reduce manufacturing costs.

Of course, the main body 01 may also have other shapes such as a cylinder or a cube. For example, referring to FIG. 5, the main body 01 may be a cylinder, and the verification component 02 provided on the second surface 012 of the main body 01 may include only one verification metal wire, and the verification metal wire may be enclosed in the shape of a desired field. , For example, can be enclosed in a square.

In the embodiment of the present application, the main body 01 may be made of materials such as aluminum, aluminum alloy, or hard plastic. The above-mentioned materials can not only ensure that the main body 01 is lighter, has better wear resistance, is easy to process, and has less interference to the beam.

6 is a cross-sectional view of a main body 01 provided by an embodiment of the present application. Referring to FIG. 6, the second surface 012 of the main body 01 may also be provided with a groove 012a, and each verification metal line 021 may be provided in the groove. Slot 012a.

Optionally, if two reference metal wires are further provided on the second surface 012 of the main body 01, the two reference metal wires may also be provided in the groove 012a.

For example, the second surface 012 of the main body 01 may be provided with a plurality of grooves 012a corresponding to the one or more verification metal lines 021 and the two reference metal lines one-to-one, and the size of each groove 012a It can be matched with the size of the corresponding metal wire, and each metal wire can be arranged in its corresponding groove 012a.

With reference to FIGS. 4 and 5, it can be seen that there are intersecting metal wires among the multiple metal wires arranged on the second surface 012 of the main body 01. For example, the first reference metal line 03 and the second reference metal line 04 intersect, and each verification metal line 021 intersects with a reference metal line. Therefore, as shown in FIG. 6, the two intersecting metal wires can be arranged at different depths of the groove 012a, that is, the two intersecting metal wires can be staggered in the depth direction of the groove 012a.

Of course, the two intersecting metal wires can also be arranged in the same layer in the groove 012a. If the same layer arrangement is adopted, one of the two intersecting metal wires can be composed of two metal wire segments arranged at intervals.

In the embodiment of the present application, the width of the groove 012a, the diameter of each verification metal line 021, and each reference metal line may all be 1 mm, the length of each verification metal line 021 may be 30 mm, and the length of each reference metal line The length can be 320mm. Alternatively, if the two reference metal lines are arranged in the same layer, one of the reference metal lines may have a length of 320 mm, and the other reference metal line may be composed of two 159 mm metal line segments.

Optionally, a groove may not be provided on the second surface 012 of the main body 01, and the verification metal wire 021 and the reference metal wire may also be provided on the second surface 012 by pasting or welding.

Optionally, referring to FIG. 4, one or more card slot groups may also be provided on the second surface 012. For example, FIG. 4 shows two

card slot groups

05a and 05b. Each card slot group 05 may include: two card slots 051 symmetrically arranged along the center point A.

Each card slot 051 can be used to clamp the edge of the film, and the one or more card slot groups can fix the film on the second side 012 of the main body 01 to prevent the film from moving and ensure the reliability of imaging.

In the embodiment of the present application, the distance between each card slot 051 and the center point A can be determined according to the size of the film to be placed. For example, the distance between each card slot 051 and the center point A can be 10mm to 15mm, and the size of the film that the card slot group can be used to fix can be 8 inches × 10 inches, 10 inches × 10 inches or 14 inches ×14 inches and so on.

Of course, the second side 012 of the main body 01 does not need to be provided with a card slot group. Correspondingly, the film can also be fixed on the second side 012 of the main body 01 by other means. For example, the film can be fixed on the second side 012 by pasting. On face 012.

FIG. 7 is a schematic diagram of a structure with a film fixed on the second side of a main body provided by an embodiment of the present application. As shown in FIG. 4 and FIG. 7, two

slot groups

05a and 05b may be provided on the second surface 012, and the two slot groups 051 included in each slot group may be strip-shaped and parallel to each other. Two card slots 051 included in one card slot group 05a are both perpendicular to the first reference metal line 03, and two card slots 051 included in the other card slot group 05b are both perpendicular to the second reference metal line 04. The two

card slot groups

05a and 05b can be used to fix the four sides of the film 00, thereby ensuring the stability of fixing the film.

In the embodiment of the present application, if the film 00 to be fixed is square, the distance between each slot 051 of the two

slot groups

05a and 05b and the center point A is equal. If the film 00 to be fixed is a non-square rectangle as shown in FIG. 7, the distance between the card slot 051 in the two

card slot groups

05a and 05b and the center point A may be unequal.

FIG. 8 is a schematic diagram of the first surface of a main body provided by an embodiment of the present application. As shown in FIG. 8, the first surface 011 of the main body 01 may also be provided with four

scale line groups

06a, 06b, 06c, and 06d. . Two of the

scale line groups

06a and 06b correspond to one calibration line 01a, and the other two

scale line groups

06c and 06d correspond to the other calibration line 01a.

Wherein, the multiple scale lines included in each scale line group take the intersection B of the two calibration lines 01a as the origin, and are arranged along the extension direction of a corresponding calibration line 01a, and two corresponding to the same calibration line 01a The arrangement direction of the scale line group can be reversed. That is, the two scale line groups corresponding to the same calibration line 01a can respectively identify the scales of the line segments of the calibration line 01a located on both sides of the intersection point B.

The field verification device provided with the scale line group can also verify the position of the light field emitted by the light field indicator. The verification process is as follows:

First, the intersection B of the two calibration lines 01a on the first surface 011 of the main body 01 of the field verification device coincides with the isocenter of the radiotherapy equipment. The method for superimposing the intersection point B and the isocenter can refer to the above description, which will not be repeated here. Then, the light field emitted by the light field indicator can be controlled to irradiate the first surface 011 of the main body 01 to form an actual light field on the first surface 011. Finally, it can be judged whether the actual position of the light field is accurate according to the scale line on the first surface 011. If there is a deviation between the actual position of the light field and the expected position of the light field, and the deviation exceeds the preset deviation range, the verifier can also adjust the position of the light field indicator according to the scale line on the first surface 011.

Optionally, referring to FIG. 8, each scale line group may include a plurality of discontinuous sub scale line groups 061. In addition, the number of sub-scale line groups 061 included in each scale line group may be the same, and the scale range may also be the same.

Wherein, the scale range of each sub-scale line group 061 may also be determined according to the size of the desired field. The scale ranges of the different sub-scale line groups 061 can correspond to the desired shooting fields of different sizes, and the multiple discontinuous sub-scale line groups 061 can further realize the verification of multiple different sizes of shooting fields.

For example, as shown in FIG. 8, each scale line group may include three discontinuous sub scale line groups 061, and the scale ranges of the three sub scale line groups 061 are 20mm to 60mm, 90mm to 110mm, and 140mm to 155mm.

In the embodiment of the present application, in order to facilitate the verification personnel to determine the actual position deviation of the light field, the area where each sub-scale line group 061 on the first surface 011 is located may also be set with a scale value, that is, a scale value may be calibrated. In addition, one or more scale values can be set in the area where each sub-scale line group 061 is located. If only one scale value is set, the scale value can be the middle value of the scale range of the sub-scale line group 061.

As an example, continue to refer to FIG. 8, the area where each sub-scale line group 061 with a scale range of 20 mm to 60 mm is located can be set with two scale values of 25 and 50. Each sub-scale line group 061 with a scale range of 90mm to 110mm can be set with a scale value of 100. Each sub-scale line group 061 with a scale ranging from 140mm to 155mm can be set with a scale value of 150.

Fig. 9 is a schematic structural diagram of another radiotherapy system provided by an embodiment of the present application. Referring to Fig. 9, the system may include a radiotherapy equipment 10, a treatment bed 20, and a field verification device 40 as described in the foregoing embodiment.

Wherein, the field verification device 40 can be set on the treatment bed 20, and the second surface 012 of the main body 01 of the field verification device 40 faces the treatment bed 20.

It can be seen with reference to FIG. 9 that the radiotherapy system may further include two laser lamps 30, one of which is disposed on the side of the drum entrance of the radiotherapy apparatus 10, and can emit laser lines in a direction perpendicular to the drum axis. Another laser light 30 may be arranged at a position opposite to the entrance of the drum, and may emit a laser line in a direction coincident with the axis of the drum.

Optionally, as shown in FIGS. 3 and 9, the frame of the radiotherapy equipment 10 may be a drum; the radiotherapy system may further include: a camera device 50 arranged in the drum. The camera device 50 may include one or more cameras.

The camera device 50 is installed inside the drum, so that when verifying the light field of the light field indicator, the verification personnel can check the scale line and the scale value on the first side 011 of the main body 01 of the light field verification device 40, so as to improve the time of light field verification. Efficiency and accuracy.

Optionally, in the embodiment of the present application, the system may further include an imaging component, and the imaging component may be a film or an EPID. Wherein, the EPID can be arranged opposite to the treatment head in the radiotherapy device 10, which can replace film imaging.

It should be understood that the "and/or" mentioned in this article means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B alone exists. This situation. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

The above are only exemplary embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A field verification device, the field verification device comprising:

A main body, the main body has a first surface and a second surface opposite to each other, and two calibration lines intersecting perpendicularly are arranged on the first surface;

At least one verification component is arranged on the second surface, each of the verification components includes one or more verification metal lines, and the center point of the figure enclosed by the one or more verification metal lines is on the first The orthographic projection on the surface coincides with the intersection of the two calibration lines.
The field verification device according to claim 1, further comprising: a first reference metal wire and a second reference metal wire arranged on the second surface;

The first reference metal line and the second reference metal line intersect vertically, and the intersection point of the first reference metal line and the second reference metal line coincides with the center point.
The field verification device according to claim 2, wherein each verification component includes four verification metal wires;

Two of the verification metal lines are perpendicular to the first reference metal line, and the other two verification metal lines are perpendicular to the second reference metal line.
The field verification device according to claim 2, wherein the orthographic projection of the first reference metal line on the first surface coincides with one of the calibration lines, and the second reference metal line is on the first surface The orthographic projection on is coincident with the other calibration line.
The field verification device according to claim 2, wherein a groove is further provided on the second surface, and each of the verification metal lines, the first reference metal lines, and the second reference metal lines are all provided in In the groove.
The field verification device according to claim 1, wherein one or more card slot groups are further provided on the second surface;

Each of the card slot groups includes: two card slots symmetrically arranged along the center point for clamping the film.
The field verification device according to claim 6, wherein two of the card slot groups are provided on the second surface, and the two card slots included in each of the card slot groups are strip-shaped and parallel to each other;

The two card slots included in one of the card slot groups are both perpendicular to the first reference metal line on the second surface, and the two card slots included in the other card slot group are both perpendicular to all the card slots. The second reference metal line on the second surface.
The field verification device according to claim 1, wherein the first surface and the second surface are both cross-shaped;

The center point of the graphic coincides with the center point of the second surface.
The field verification device according to claim 1, further provided with four scale line groups on the first surface, wherein two of the scale line groups correspond to one of the calibration lines, and the other two of the scale lines The group corresponds to the other calibration line;

The multiple scale lines included in each of the scale line groups are arranged along the extension direction of the corresponding one of the calibration lines with the intersection of the two calibration lines as the origin, and two corresponding to the same calibration line The arrangement directions of each of the scale line groups are opposite.
The field verification device according to claim 9, wherein each of the scale line groups includes a plurality of discontinuous sub scale line groups;

The number of the sub-scale line groups included in each of the scale line groups is the same, and the scale range is the same.
The field verification device according to claim 9, wherein the area where each of the sub-scale line groups is located on the first surface is also calibrated with a scale value.
The field verification device according to claim 1, wherein the material of the main body is aluminum, aluminum alloy or hard plastic.
The field verification device according to claim 2, wherein the verification metal wire, the first reference metal wire and the second reference metal wire are made of tungsten alloy or lead alloy.
A radiotherapy system, comprising: radiotherapy equipment, a treatment bed, and the field verification device according to any one of claims 1 to 13;

Wherein, the radiation field verification device is arranged on the treatment bed, and the second side of the main body of the radiation field verification device faces the treatment bed.
The radiotherapy system according to claim 14, wherein the frame of the radiotherapy equipment is a drum; the radiotherapy system further comprises: a camera device arranged in the drum.
The radiotherapy system according to claim 14, further comprising: two laser lights, one of which is provided on the side of the entrance of the drum for emitting in a direction perpendicular to the axis of the drum The laser line, another laser light is arranged at a position opposite to the entrance of the drum, and is used to emit the laser line in a direction coincident with the axis of the drum.
The radiotherapy system according to claim 14, the system further comprising: an imaging component;

The imaging component is a film or an electronic field imaging device.