CN214807945U - Centering device - Google Patents

Abstract

The application provides a school device relates to medical radiation technical field, including the base to and establish at least a set of emission subassembly on the base, wherein, emission subassembly is used for launching back of the body and collinear light beam mutually. The emitting component emits opposite and collinear light beams which respectively face the bulb and the detector, and the light beams respectively strike the center of a beam outlet of the bulb and the center of the detector so as to ensure that the beam center line of the beam emitted by the bulb just strikes the center of the detector during imaging. The positions of the bulb tube and the detector can be adjusted through the centering device, the beam center line of the beam emitted by the bulb tube can be ensured to pass through the center of the detector, and the imaging positioning accuracy is improved.

Description

Centering device

Technical Field

The application relates to the technical field of medical radiation, in particular to a centering device.

Background

In order to increase the accuracy of the radiation therapy, image guidance before or during the radiation therapy is carried out with the imaging device.

The imaging device comprises a bulb and a detector, wherein the bulb is arranged opposite to the detector, the bulb is used for emitting imaging beams, and the detector is used for receiving the imaging beams and generating projection data so as to reconstruct a patient image by using the projection data. In the process, the central axis of an imaging beam emitted by the bulb tube needs to pass through the central point of the detector, and the imaging position corresponding to the central point is the imaging central point for positioning imaging.

However, if the central axis of the imaging beam from the tube is not aligned with the center point of the detector, the accuracy of the imaging positioning is affected.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the present application is to provide a centering device, which can correct the positions of a bulb and a detector to improve the accuracy of imaging positioning.

In one aspect of the embodiments of the present application, a centering device is provided, which includes a base and at least one set of emission assemblies disposed on the base, wherein the emission assemblies are configured to emit light beams that are opposite and collinear.

The emission assembly emits oppositely-arranged light beams to two sides in opposite directions, the light beams are in a straight line, when the oppositely-arranged and collinear light beams are emitted towards the bulb and the detector respectively, if the oppositely-arranged and collinear light beams can reach the center of a beam outlet of the bulb and the center of the detector respectively, in this way, during imaging, the beam center line of the beam emitted by the bulb just reaches the center of the detector. Otherwise, the position of the bulb and the detector may be adjusted so that the oppositely directed collinear beams strike the center of the beam exit of the bulb and the center of the detector, respectively.

Optionally, the emitting assembly includes a bidirectional laser having two emitting surfaces opposite to each other, for emitting laser beams which are opposite to each other and collinear; or the emission assembly comprises two symmetrically arranged lasers, and the emission surfaces of the two lasers are opposite and deviate from the emitted laser beams and are collinear.

The bidirectional laser has two emitting surfaces which are arranged in an opposite way and respectively emit laser beams in opposite directions.

The emission assembly can also comprise two lasers, each laser is provided with an emission surface, and the emission surfaces of the two lasers are arranged in a back-to-back mode and can emit laser beams which are back-to-back and collinear.

Optionally, when the number of the emission assemblies is at least two, a preset included angle is formed between straight lines of light beams emitted by two adjacent groups of the emission assemblies.

Optionally, when the two groups of emission assemblies are provided, the preset included angle between the straight lines of the light beams emitted by the two groups of emission assemblies is 90 °.

Optionally, the centering device further comprises a mounting base, and the mounting base is movably connected with the base through a rotating shaft, so that the base can rotate relative to the mounting base. The base can rotate relative to the mounting base through the rotating shaft, so that the emitting angle of the laser emitted by the laser is adjusted.

Optionally, when the number of the emission assemblies is at least two, the rotating shaft is located at an intersection point of straight lines where the light beams emitted by the at least two groups of the emission assemblies are located.

Optionally, the school center device further comprises an adjusting screw, a strip-shaped hole is formed in the base, and the adjusting screw penetrates through the strip-shaped hole and is fixed to the mounting seat. After the emission angle is adjusted, the base and the mounting seat are fixed through the strip-shaped holes and the adjusting screws.

Optionally, a level gauge is arranged on the base and used for measuring the levelness of the base. The level meter measures the levelness of the base, and when the emission component is two symmetrical lasers, the two lasers are symmetrical along the center of the base. And if the levelness of the base measured by the level gauge is not satisfactory, unscrewing the adjusting screw and readjusting the emission angle of the laser beam emitted by the laser.

Optionally, the imaging pattern of the light beam emitted by the emission assembly is a cross pattern or a dot pattern. The cross-shaped graph or the dot-shaped graph is convenient for focusing and positioning, and can clearly judge whether the light beam hits the center of the beam outlet of the bulb tube and the center of the detector.

Optionally, the centering device further comprises a mounting bracket, and the mounting bracket is connected with the mounting base and is used for supporting the centering device.

The centering device provided by the embodiment of the application is used for centering the bulb tube and the detector of the imaging device. This school device sets up emission subassembly on the base, and emission subassembly can launch back of the body and collinear light beam mutually. When the device is used, the straight line where the back-to-back collinear light beams are located passes through the isocenter of radiotherapy equipment, then the transmitting assembly is opened, the back-to-back collinear light beams transmitted by the transmitting assembly are respectively emitted to the bulb tube and the detector, and then the positions of the bulb tube and the detector are adjusted according to the light beams, so that the light beams can respectively emit to the center of a beam outlet of the bulb tube and the center of the detector, and the central line of the beam emitted by the bulb tube just emits to the center of the detector during imaging.

The emission component can emit light beams towards the bulb tube and the detector respectively through the centering device, when the light beams respectively strike the center of a beam outlet of the bulb tube and the center of the detector, the center line of the beam emitted by the bulb tube just strikes the center of the detector during imaging, and therefore accuracy of imaging positioning is guaranteed. Otherwise, the position of the bulb and the detector may be adjusted by the light beam until the light beam hits the center of the beam exit of the bulb and the center of the detector, respectively. The position of the bulb and the position of the detector can be adjusted through the centering device, and the beam center line of the beam emitted by the bulb can penetrate through the center of the detector.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is one of the schematic views of a bulb and probe configuration;

FIG. 2 is a second schematic view of the bulb and probe configuration;

FIG. 3 is a schematic diagram of a structure of a centering device according to this embodiment;

FIG. 4 is a second schematic structural diagram of the centering device provided in this embodiment;

fig. 5 is one of schematic structural diagrams of a laser of the centering device provided in this embodiment;

fig. 6 is a second schematic structural diagram of a laser of the centering device provided in this embodiment;

fig. 7 is one of schematic structural diagrams of a centering radiotherapy apparatus of the centering device according to the present embodiment;

fig. 8 is a second schematic structural diagram of a centering radiotherapy apparatus of the centering device of the present embodiment;

fig. 9 is a third schematic structural diagram of a centering radiotherapy apparatus of the centering device of the present embodiment.

Icon: 10-a base; 12-a strip-shaped hole; 13-adjusting screws; 14-a support; 21A-a bi-directional laser; 21B-laser; 211-an emitting surface; 22-a rotating shaft; 30-a mounting seat; 31-a screw; 210-isocenter; 220-bulb tube; 230-a detector; 240-mounting a bracket.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Taking fig. 1 and 2 as an example, the imaging device includes at least one set of the bulb 220 and the detector 230, and for one set of the bulb 220 and the detector 230, the detector 230 is located on the opposite side of the bulb 220, and the beam centerline (or the central axis) of the bulb 220 must pass through the isocenter 210 to reach the center of the detector 230.

The bulb 220 emits an imaging beam and the detector 230 receives the imaging beam and generates projection data for subsequent reconstruction of a patient image using the projection data. The central axis of the imaging beam from the bulb 220 must pass through the center point of the detector 230, and the imaging position corresponding to the center point is the imaging center point for positioning the imaging. Typically, the imaging is located with the imaging center point. The accuracy of the imaging location is affected if the central axis of the imaging beam from the bulb 220 is not aligned with the center point of the detector 230.

On this basis, the embodiment of the present application provides a centering device, by which the positions of the bulb 220 and the detector 230 can be adjusted so that the beam center axis of the bulb 220 can pass through the center of the detector 230.

As shown in fig. 3 and 4, the present collimation device includes a base 10, and at least one set of emission components disposed on the base 10, the emission components being used for emitting opposite and collinear light beams.

When the centering device is installed, the back-of-the-phase and collinear beam of light in the centering device is directed through the isocenter 210 of the radiotherapy apparatus.

Here, the isocenter 210 of the radiotherapy apparatus may be an actual isocenter of the radiotherapy apparatus or a virtual isocenter of the radiotherapy apparatus. When the central axis of the beam of the imaging device passes through the actual isocenter of the radiotherapy apparatus, the isocenter 210 of the radiotherapy apparatus is the actual isocenter; when the central axis of the beam of the imaging device passes through a virtual isocenter that is in a predetermined positional relationship with the actual isocenter of the radiotherapy apparatus, the isocenter 210 of the radiotherapy apparatus is the virtual isocenter.

As shown in fig. 5, the emitting assembly may include a bi-directional laser 21A, and the bi-directional laser 21A is provided with two opposite emitting surfaces 211 for emitting the opposite collinear laser beams. Here, the bi-directional laser 21A may be disposed at the center of the base 10.

As shown in fig. 6, the emitting assembly may further include two symmetrically disposed lasers 21B, the lasers 21B having an emitting surface 211, the two lasers 21B emitting laser beams respectively facing away from each other, the emitting surfaces 211 of the two lasers 21B facing away from each other and being collinear with the emitted laser beams.

Further, a group of emitting assemblies is formed by arranging two lasers 21B, and the two lasers 21B emit light beams in directions departing from the center of the base 10 respectively by taking the center of the base 10 as the center so as to form laser beams which are back to back and collinear.

At least one set of emission components is provided on the base 10, and the number of emission components (number of sets) corresponds to the number of imaging devices. When there are a plurality of imaging devices formed by the bulbs 220 and the detectors 230, there are a plurality of sets of emission components to adapt to the application scenarios of different numbers of bulbs 220 and detectors 230.

Illustratively, two sets of emitting assemblies are disposed on the base 10 in fig. 3, two lasers 21B form one set of emitting assemblies, two lasers 21B can respectively emit laser beams in a direction away from the center of the base 10, the laser beams emitted by the two lasers 21B are collinear, and an intersection of connecting lines of the laser beams emitted by two sets of diagonal lasers 21B can be used to coincide with the isocenter 210 of the radiotherapy apparatus when the centering device is installed. Here, the intersection point may be the center of the susceptor 10 as shown in fig. 3.

When the number of the emission assemblies is at least two, a preset included angle is formed between straight lines of light beams emitted by two adjacent groups of emission assemblies. The light beams emitted by each group of emission assemblies form a straight line, and the light beams emitted by two adjacent groups of emission assemblies form a preset included angle.

When the emission assemblies are two groups, the preset included angle between the straight lines of the light beams emitted by the two groups of emission assemblies is 90 degrees.

Illustratively, the surface of the substrate 10 on which the lasers 21B are disposed has a square shape, and two sets of diagonal lasers 21B are disposed on the diagonal lines of the square shape, respectively. The connecting lines of the laser beams emitted by the two groups of diagonal lasers 21B are perpendicular to each other, that is, the preset included angle is 90 degrees.

Of course, the lasers 21B may also be arranged on the side lines of the square, as long as the symmetrical lasers 21B emit laser beams that are opposite and collinear.

The bidirectional laser 21A or the laser 21B may emit a red laser beam or may emit laser beams of other colors, which is not specifically limited in this embodiment and may be specifically set according to actual needs.

The emitting components emit the opposite collinear beams, so that when the centering device is used for centering, a structure as shown in fig. 7 can be formed, the two-way laser 21A emits laser beams towards the bulb 220 and the detector 230 respectively, the opposite collinear beams pass through the isocenter 210 of the radiotherapy equipment in a straight line, the laser beams emitted by the two-way laser 21A are on the same straight line, the positions of the bulb 220 and the detector 230 are adjusted, and when the center of a beam outlet of the bulb 220 and the center of the detector 230 are also collinear, the opposite collinear beams can respectively hit the center of the beam outlet of the bulb 220 and the center of the detector 230, so that the center line of the beam emitted by the bulb 220 just hits the center of the detector 230 during imaging.

If not, because the positions of the bulb 220 and the detector 230 are adjustable, the positions of the bulb 220 and the detector 230 can be continuously adjusted by the feature that the laser beam is in a straight line until the laser beam can respectively hit the center of the beam outlet of the bulb 220 and the center of the detector 230.

The laser beam may be a laser beam emitted in two opposite directions by one bidirectional laser 21A shown in fig. 7 at the same time, or may be a laser beam emitted in two opposite directions by two lasers 21B shown in fig. 8. Thus, when the straight line of the opposite and collinear beams passes through the isocenter 210 of the radiotherapy apparatus, the positions of the bulb 220 and the detector 230 can be adjusted according to whether the laser beams respectively hit the center of the beam outlet of the bulb 220 and the center of the detector 230. If there are two groups of bulbs 220 and detectors 230, then as shown in fig. 9, two groups of emitting assemblies formed by four lasers 21B emit laser beams toward the two corresponding groups of bulbs 220 and detectors 230, respectively, and the preset included angle between the straight lines of the light beams emitted by the two groups of emitting assemblies is 90 °.

Further, a support 14 matched with the emitting assembly is arranged on the base 10, the emitting assembly is arranged on the support 14, and the emitting assembly is fixedly connected with the base 10 through the support 14. The firing assembly may also be removed from the cradle 14 for servicing in the event of a failure.

Illustratively, the laser 21B is disposed on the support 14. The support 14 fixes the emission assembly to ensure that the emission assembly can stably emit the light beam, and prevent the emission assembly from being damaged due to accidental factors such as shaking caused by directly mounting the emission assembly on the base 10, and the support 14 fixes and protects the emission assembly.

In addition, the emitting component is movably connected to the base 10, and the support 14 is provided with a long hole (not shown), and the emitting component is fixed to the base 10 by a mounting screw passing through the long hole.

Elongated holes are provided in the support 14, and the position of the transmitter assembly on the mounting block 30 can be adjusted by mounting screws (not shown) at different positions in the elongated holes. Accurate alignment is facilitated when the firing assembly is adjustable in position on the base 10. For example, when the two lasers 21B are not exactly symmetrical due to processing errors, the laser beams emitted by the two lasers 21B are not exactly collinear, and the collinear characteristic can be ensured by fine-tuning the positions of the lasers 21B.

In addition, the imaging pattern of the light beam emitted by the emitting assembly is a cross pattern or a dot pattern, which is convenient for positioning and can clearly determine whether the light beam hits the center of the beam outlet of the bulb 220 and the center of the detector 230.

Of course, the laser line forming image in the embodiment of the present application is not limited to the cross pattern or the dot pattern, and any other pattern that can facilitate focusing and positioning may be used.

The imaging pattern of the light beam emitted by the emitting component is determined by the emitting component, so that when the emitting component is selected, the emitting component with the imaging pattern convenient for positioning can be selected.

The centering device provided by the embodiment is used for centering the bulb 220 and the detector 230, and the bulb 220 and the detector 230 are arranged oppositely. The emission assembly provided on the base 10 is capable of emitting opposing and collinear beams of light. When the device is used, the straight line where the opposite and collinear light beams are located passes through the isocenter 210 of radiotherapy equipment, then the emission assembly is opened, the opposite and collinear light beams emitted by the emission assembly are respectively emitted to the bulb tube 220 and the detector 230, and the positions of the bulb tube 220 and the detector 230 are adjusted according to the light beams, so that the light beams can respectively emit to the center of a beam outlet of the bulb tube 220 and the center of the detector 230, and the beam center line of the light beam emitted by the bulb tube 220 is just emitted to the center of the detector 230 during imaging.

By using the centering device, the emission component can emit light beams towards the bulb 220 and the detector 230 respectively, when the light beams respectively hit the center of the beam outlet of the bulb 220 and the center of the detector 230, the beam center line of the light beam emitted by the bulb 220 is just hit at the center of the detector 230 during imaging, so as to ensure the accuracy of imaging positioning. Otherwise, the positions of the bulb 220 and the detector 230 may be adjusted by the light beam until the light beam hits the center of the beam exit of the bulb 220 and the center of the detector 230, respectively. With the present alignment device, the positions of the bulb 220 and the detector 230 can be adjusted to ensure that the beam centerline of the beam emitted from the bulb 220 passes through the center of the detector 230.

Further, the centering device further comprises a mounting base 30, wherein the mounting base 30 is movably connected with the base 10 through a rotating shaft 22, so that the base 10 can rotate relative to the mounting base 30 to adjust the emission angle of the light beam emitted by the emission assembly.

Illustratively, as shown in fig. 3 and 4, the emission assemblies are two groups, and the rotating shaft 22 is located at the intersection point of the straight lines where the light beams emitted by the two groups of emission assemblies are located. The base 10 is rotatable on the mounting base 30 by the rotation shaft 22, so that the position of the base 10 relative to the radiotherapy apparatus can be adjusted, thereby adjusting the emission angle of the laser beam.

Need fixed base 10 after adjusting the transmission angle, be equipped with bar hole 12 and adjusting screw 13 on the base 10, adjusting screw 13 passes bar hole 12 and mount pad 30 is fixed.

Illustratively, the strip-shaped hole 12 is an arc-shaped strip-shaped hole, and the adjusting screw 13 passes through the strip-shaped hole 12 and is fixed with the mounting seat 30. After the base 10 is adjusted to rotate relative to the mounting seat 30, the base 10 and the mounting seat 30 are fixed through the strip-shaped holes 12.

In order to improve the centering accuracy and ensure the levelness of the centering device during installation, a level gauge (not shown) is disposed on the base 10, and the level gauge can be located at the edge of the base 10 and used for measuring the levelness of the base 10 relative to the radiotherapy equipment during centering of the centering device, so as to ensure that the laser beam can accurately hit the center of the beam outlet of the bulb 220 and the center of the detector 230.

The base 10 is desirably level, for example, when the emitting assembly includes two lasers 21B, the two lasers 21B may be symmetrical along the center of the base 10, thereby ensuring that the position of the bulb 220 or the detector 230 is symmetrical along the isocenter 210 of the radiotherapy apparatus.

After the levelness of the base 10 is measured by the level meter, if the levelness is satisfactory, the laser beam emitted by the laser 21B can be made to hit the center of the beam outlet of the bulb 220 and the center of the detector 230. If the levelness is not satisfactory, the adjusting screw 13 can be screwed off, and the base 10 can be rotated and adjusted relative to the mounting base 30 by rotating the base 10 to meet the requirement.

Further, the base 10 can be installed by the installation base 30 and the installation bracket 240 shown in fig. 2, the installation position and height of the installation bracket 240 can be adjusted, and the center of the base 10 of the calibration apparatus is positioned at the isocenter 210 of the radiotherapy apparatus by using the installation bracket 240.

The mounting base 30 is further provided with mounting holes (not shown) for connecting the mounting brackets 240 by screws 31.

In summary, when the centering device is used, the base 10 can be fixed by the mounting base 30 and the mounting bracket 240, so that the center of the centering device base 10 coincides with the isocenter 210 of the radiotherapy equipment, and then the levelness of the base 10 can be measured by using a level meter, if the levelness does not meet the requirement, the base 10 is adjusted by the rotating shaft 22, so that the base 10 rotates relative to the mounting base 30, and the emission angle of the light beam emitted by the emission assembly is adjusted. After the adjustment is completed, the base 10 and the mounting seat 30 are fixed by the adjusting screw 13. The emission assembly is then turned on and the opposing collinear beams of light emitted by the emission assembly are directed toward the bulb 220 and the detector 230, respectively, and when the opposing collinear beams of light strike the center of the beam exit of the bulb 220 and the center of the detector 230, respectively, it is determined that the beam centerline of the beam emitted by the bulb 220 strikes exactly at the center of the detector 230 at the time of imaging. Otherwise, the positions of the bulb 220 and the detector 230 may be adjusted according to the light beams until the opposite and collinear light beams respectively hit the center of the beam outlet of the bulb 220 and the center of the detector 230, so that the beam center line of the beam emitted from the bulb 220 just hits the center of the detector 230 during imaging. The positions of the bulb 220 and the detector 230 are adjusted through the centering device, so that the beam center line of the beam emitted by the bulb 220 can be ensured to just pass through the center of the detector 230, and the accuracy of imaging positioning is ensured.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The centering device is characterized by comprising a base and at least one group of emission assemblies arranged on the base, wherein the emission assemblies are used for emitting opposite collinear light beams.

2. The centering device of claim 1, wherein said emitting assembly comprises a bi-directional laser having two opposing emitting surfaces for emitting opposing collinear laser beams; or the emission assembly comprises two symmetrically arranged lasers, and the emission surfaces of the two lasers are opposite and deviate from the emitted laser beams and are collinear.

3. The centering device of claim 1, wherein when at least two groups of said emission assemblies are provided, a predetermined angle is formed between straight lines of light beams emitted by two adjacent groups of said emission assemblies.

4. The centering device according to claim 3, wherein when there are two sets of said emission assemblies, said preset angle between the straight lines of the light beams emitted by said two sets of said emission assemblies is 90 °.

5. The centering device as claimed in claim 1, further comprising a mounting base, wherein said mounting base is movably connected to said base via a shaft, so that said base can rotate relative to said mounting base.

6. The centering device of claim 5, wherein when said emission assemblies are at least two groups, said rotating shaft is located at the intersection point of the straight lines where the light beams emitted by at least two groups of said emission assemblies are located.

7. The centering device as claimed in claim 5, further comprising an adjusting screw, wherein a strip-shaped hole is formed in the base, and the adjusting screw penetrates through the strip-shaped hole and is fixed with the mounting seat.

8. The centering device of claim 1, wherein a level is provided on said base for measuring the levelness of said base.

9. The centering device of claim 1, wherein the imaging pattern of the light beam emitted by said emitting assembly is a cross pattern or a dot pattern.

10. The centering device of claim 5, further comprising a mounting bracket coupled to said mounting base for supporting said centering device.

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