CN112824823A

CN112824823A - Precision measurement system, radiotherapy equipment isocenter precision measurement method and device

Info

Publication number: CN112824823A
Application number: CN201911144578.3A
Authority: CN
Inventors: 郭召
Original assignee: Our United Corp
Current assignee: Our United Corp
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2021-05-21

Abstract

The embodiment of the invention provides a precision measurement system, a method and a device for measuring the precision of an isocenter of radiotherapy equipment, relates to the field of measurement, and can more accurately measure the precision of the isocenter of the radiotherapy equipment. The system comprises: a reference measuring bar; the rotating body is arranged on the side surface of the reference measuring rod, and the central axis of the rotating body is perpendicular to and intersected with the central axis of the reference measuring rod; a measuring tool mounting base; the measuring tool comprises a measuring tool mounting seat, a radial measuring meter and an axial measuring meter, wherein the radial measuring meter and the axial measuring meter are arranged on the measuring tool mounting seat, and a central axis of a measuring head of the radial measuring meter is perpendicular to and intersected with a central axis of a measuring head of the axial measuring meter; the radial measuring meter is used for measuring the runout of the rotating body in the radial direction, and the axial measuring meter is used for measuring the runout of the rotating body in the axial direction.

Description

Precision measurement system, radiotherapy equipment isocenter precision measurement method and device

Technical Field

The invention relates to the field of measurement, in particular to a method and a device for measuring the center precision of a precision measuring system, radiotherapy equipment and the like.

Background

Radiotherapy is an effective means for curing cancer, and most radiotherapy equipment adopts isocentric treatment, in which reference axes of various movements (such as a beam flow axis of a treatment head and a revolving axis of a gantry) move around a common central point according to the definition of an International Electrotechnical Commission (IEC) isocenter, and a beam flow axis of the treatment head passes through a minimum sphere centering on the point during use of the radiotherapy equipment, which is the isocenter. The isocenter precision is a key technical index of large-scale radiotherapy equipment, and the isocenter precision of the early medical linear accelerator is 1-2 mm, so that the equipment is gradually eliminated at present. At present, the isocenter precision of mainstream equipment reaches 0.5mm and is continuously improved, and various manufacturers strive to improve the isocenter precision through different architecture designs.

The traditional accelerator adopts a pointer method for verifying the mechanical isocenter precision, and through visual judgment, the method has high dependence on people and is easy to misjudge, and the misjudgment of the isocenter precision can cause the formulated treatment plan to be improper, so that treatment accidents are caused. Meanwhile, the traditional pointer method can only identify millimeter-grade isocenter precision, and the precision is superior to 0.5mm along with the improvement of equipment precision, so that isocenter precision measurement is difficult to carry out by the method.

Disclosure of Invention

The embodiment of the invention provides a precision measurement system, a method and a device for measuring the isocenter precision of radiotherapy equipment, which can more accurately measure the isocenter precision of the radiotherapy equipment.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, there is provided an accuracy measurement system, comprising: a reference measuring bar; the rotating body is arranged on the side surface of the reference measuring rod, and the central axis of the rotating body is perpendicular to and intersected with the central axis of the reference measuring rod;

a measuring tool mounting base;

the measuring tool comprises a measuring tool mounting seat, a radial measuring meter and an axial measuring meter, wherein the radial measuring meter and the axial measuring meter are arranged on the measuring tool mounting seat, and a central axis of a measuring head of the radial measuring meter is perpendicular to and intersected with a central axis of a measuring head of the axial measuring meter;

the radial measuring meter is used for measuring the radial runout of the rotating body, and the axial measuring meter is used for measuring the axial runout of the rotating body.

In a second aspect, a method for measuring isocenter accuracy of radiotherapy equipment is provided, which is applied to the accuracy measurement system provided in the first aspect, and includes:

when the central axis of the reference measuring rod is superposed with the beam axis of the radiotherapy equipment, the central axis of the rotating body is superposed with the rotary axis of the rack of the radiotherapy equipment, the measuring heads of the radial measuring meter and the axial measuring meter are both contacted with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body, the radial runout data of the rotating body measured by the radial measuring meter and the axial runout data of the rotating body measured by the axial measuring meter are obtained in the rotating process of the rack of the radiotherapy equipment;

and calculating the accuracy of the isocenter of the radiotherapy equipment according to the radial run-out data and the axial float data.

In a third aspect, an isocenter accuracy measuring apparatus of a radiotherapy device is provided, including: a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the isocenter accuracy measuring apparatus of a radiotherapy device is operated, the processor executes computer-executable instructions stored in the memory to cause the isocenter accuracy measuring apparatus of the radiotherapy device to perform the isocenter accuracy measuring method as provided in the second aspect.

In a fourth aspect, there is provided a computer storage medium comprising computer executable instructions which, when executed on a computer, cause the computer to perform the isocenter accuracy measurement method of a radiotherapy apparatus as provided in the second aspect.

The precision measurement system, the isocenter precision measurement method and the isocenter precision measurement device provided by the embodiment of the invention have the advantages that the precision measurement system comprises: a reference measuring bar; the rotating body is arranged on the side surface of the reference measuring rod, and the central axis of the rotating body is perpendicular to and intersected with the central axis of the reference measuring rod; a measuring tool mounting base; the measuring tool comprises a measuring tool mounting seat, a radial measuring meter and an axial measuring meter, wherein the radial measuring meter and the axial measuring meter are arranged on the measuring tool mounting seat, and a central axis of a measuring head of the radial measuring meter is perpendicular to and intersected with a central axis of a measuring head of the axial measuring meter; the radial measuring meter is used for measuring the runout of the rotating body in the radial direction, and the axial measuring meter is used for measuring the runout of the rotating body in the axial direction. When the accuracy of the isocenter of radiotherapy equipment is measured based on the accuracy measuring system, firstly, a reference measuring rod and a measuring tool mounting seat are correspondingly mounted, so that the central axis of the reference measuring rod is superposed with a beam axis of a treatment head, the central axis of a rotating body is superposed with a rotary axis of a rack of the radiotherapy equipment, measuring heads of a radial measuring meter and an axial measuring meter are both contacted with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body; after the arrangement, when the frame of the radiotherapy equipment is controlled to rotate around the rotation axis of the frame, the jumping values (radial jumping value and axial jumping value) generated by the rotating body in the whole process can be measured in real time, and the jumping value obtained by measurement can accurately reflect the accuracy of the isocenter of the radiotherapy equipment because the isocenter of the radiotherapy equipment is positioned near the intersection point of the central axis of the reference measuring rod and the central axis of the rotating body; after the radial runout data of the rotating body and the axial movement data of the rotating body are obtained, the accuracy of the isocenter of the radiotherapy equipment can be calculated according to the data. In the whole measuring process, because the error of the isocenter in the working process is converted into the jitter value of a partial structure by using a proper structure, the isocenter is suitable for measurement, and the measurement is carried out by using a measuring meter which is not the conventional manual visual measurement and cannot generate errors due to different reading modes of different people, the technical scheme provided by the embodiment of the invention is more accurate in accuracy measurement of the isocenter of radiotherapy equipment than the conventional pointing method on the whole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a radiotherapy apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a precision measurement system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a reference measuring rod and a rotating body according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a rotating body according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a measuring tool mounting base provided by an embodiment of the invention for mounting a radial measuring meter and an axial measuring meter;

FIG. 6 is a schematic structural diagram of another precision measurement system provided in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another precision measurement system provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a three-dimensional sliding table according to an embodiment of the present invention;

fig. 9 is a schematic flowchart of a method for measuring accuracy of a radiotherapy apparatus according to an embodiment of the present invention;

fig. 10 is a schematic flowchart of another method for measuring accuracy of a radiotherapy apparatus according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a process for determining a target location according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of another process for determining a target location according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of another process for determining a target location according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of a further process for determining a target location according to an embodiment of the present invention;

FIG. 15 is a schematic view of a zero position of the rack provided by an embodiment of the present invention;

FIG. 16 is a schematic view of a calibration of a reference dipstick according to an embodiment of the invention;

fig. 17 is a schematic view illustrating calibration of a rotating body according to an embodiment of the present invention.

Fig. 18 is a schematic structural diagram of an isocenter accuracy measuring apparatus of radiotherapy equipment according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

It should be noted that, in the embodiments of the present invention, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that, when the difference is not emphasized, the intended meaning is consistent.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used for distinguishing the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like are not limited in number or execution order.

Radiation therapy is an effective means of treating cancer, and radiotherapy apparatus is particularly important in the course of radiation therapy as an apparatus for delivering radiation therapy. The treatment plan of the current radiotherapy needs to be made by taking the isocenter of radiotherapy equipment as a key technical index. In accordance with the definition of IEC isocenter, in radiotherapy devices in which the reference axes of motion (e.g. the beam axis of the treatment head and the gantry axis of revolution) move about a common central point, the beam axis of the treatment head passes through the smallest sphere centered at this point, the isocenter, during use of the radiotherapy device. The accuracy of the isocenter then refers to the radius of the smallest sphere in which the isocenter is located. Illustratively, referring to fig. 1, taking an accelerator using a roller frame as an example, the isocenter of the accelerator is the intersection point of the beam axis of the treatment head of the accelerator and the rotation axis of the roller frame.

At present, most methods adopted for measuring or verifying the accuracy of the isocenter of the radiotherapy equipment are judged visually, the accuracy is low, and the accuracy of the isocenter of the radiotherapy equipment which is more and more precise is difficult to measure accurately.

In view of the above problem, referring to fig. 2, an embodiment of the present invention provides an accuracy measurement system, including: a reference measuring rod 11, a rotating body 13 arranged on the side of the reference measuring rod 11, a gauge mounting seat 12, and a radial measuring gauge 14 (including 14-1, 14-2 and 14-3) and an axial measuring gauge 15 arranged on the gauge mounting seat 12; wherein, the central axis of the rotating body 13 is perpendicular to and intersects with the axis of the reference measuring bar 11; the center axis of the gauge head 141 of the radial gauge 14 (including 141-1, 141-2 and a gauge head of a third radial gauge (corresponding reference numerals not shown in fig. 2)) and the center axis of the gauge head 151 of the axial gauge 15 are perpendicular to and intersect with each other, the radial gauge is used for measuring runout (play) of the rotary body 13 in the radial direction, and the axial gauge is used for measuring runout (play) of the rotary body in the axial direction.

Illustratively, referring to fig. 2, the radial direction in the above embodiment refers to any direction on a plane perpendicular to the central axis of the rotating body 13, and the axial direction refers to the direction of the central axis of the rotating body 13.

For example, the rotating body may be a sphere, an ellipsoid, a cylinder, a cone, or the like; the embodiment of the present invention is mainly illustrated by taking a sphere as an example.

For example, referring to fig. 2, the rotating body 13 may be provided on a side surface of one end of the reference measuring stick 11, or may be provided in a middle portion of the side surface of the reference measuring stick 11, as long as it does not affect subsequent use.

For example, referring to (1) in fig. 3, when the rotating body 13 is a sphere, a target straight line where a diameter is located exists in the sphere, that is, the central axis of the foregoing rotating body is perpendicular to and intersects the central axis of the reference measuring rod 11; referring to (2) in fig. 3, when the rotating body 13 is a cylinder, the central axis of the cylinder is perpendicular to and intersects the central axis of the reference measuring bar 11; referring to (3) in fig. 3, when the rotating body 13 is a cone, the central axis of the cone is perpendicular to and intersects the central axis of the reference measuring rod 11.

Optionally, a plurality of (at least two) radial meters 14 may be provided, and the more the radial meters 14 are, the more the last measured data is, the more accurate the obtained test result is, so as shown in fig. 2, at least two radial meters 14 are provided, and meanwhile, in order to improve the measurement accuracy in the three-dimensional direction, the central axes of the measuring heads of at least two radial meters are perpendicular to each other; three radial gauges 14 are shown in FIG. 2, namely radial gauge 14-1, radial gauge 14-2, and radial gauge 14-3; the central axis of the measuring head 141-1 of 14-1 is perpendicular to the central axis of the measuring head 141-2 of 14-2, the central axis of the measuring head 141-2 of 14-2 is coincident with the central axis of the measuring head of 14-3, and the measuring heads 141-1 and 141-3 of 14-1 are perpendicular.

Alternatively, referring to fig. 2, in order to facilitate the connection of the gauge mounting base 12, the radial meter 14 and the axial meter 15, the radial meter 14 is mounted in the same plane perpendicular to the central axis of the measuring head 151 of the axial meter 15.

In order to describe the relationship between the respective members in use more easily, the state of the precision measuring system shown in fig. 2 is a state in which the rotating body is just about to contact all the radial direction gauges and the axial direction gauge when the precision measuring system is mounted in actual measurement use.

Alternatively, as shown in fig. 4, when the rotating body 13 is a spherical body 13, the spherical body 13 is provided with a connecting portion 16; the connecting part 16 is connected with the side surface of one end of the reference measuring rod 11, so that a central axis of the sphere 13 is perpendicular to and intersected with the central axis of the reference measuring rod 11; for example, the connecting portion 16 may be a cylinder, one end of the reference measuring rod 11 connected with the sphere 13 is provided with a through hole matched with the cylinder, and the sphere 13 is connected to the reference measuring rod 11 through the connecting portion 16 by matching (for example, interference fit) of the two; in practice, the ball 13 and the connecting part 16 are generally present at the same time and are called reference bulbs; the reference ball head is formed by connecting a concave surface corresponding to the surface of a sphere with a spherical surface after being butted, a plane corresponding to the bottom surface of the cylinder is formed on the surface of the sphere and is connected with the bottom surface of the cylinder after being butted, the bottom surface of the cylinder and the surface of the sphere are connected by welding spots, the reference ball head is formed by die sinking, and the forming mode of the reference ball head is not particularly limited. Of course, the present invention does not specifically limit the structure of the connection portion 16 between the reference measuring bar 11 and the ball 13, and only needs to enable the jitter value of the ball 13 to be measured in the subsequent measuring process.

Alternatively, as shown in FIG. 2, because it is necessary to fix the axial meter 15 and the radial meter 14 to the gauge mount 12, the gauge mount 12 is provided with the axial connecting member 18 and the radial connecting member 17(17-1, 17-2, and 17-3);

the measuring tool mounting base 12 is connected with the axial direction measuring meter 15 through the axial direction connecting piece 18, and the central axis of the measuring head 151 of the axial direction measuring meter 15 is overlapped with the central axis of the rotating body 13;

the gauge mounting base 12 is connected to the radial meter 14 through the radial connecting member 17, and the central axis of the measuring head 141 of the radial meter 14 is perpendicular to and intersects the central axis of the measuring head 151 of the axial meter 15.

Optionally, there may not be an axial connecting piece separately arranged on the measuring tool mounting seat, at this time, a through hole corresponding to the shape of the axial measuring meter is directly arranged on the measuring tool mounting seat, the axial measuring meter is inserted into the through hole, and the measuring tool mounting seat and the axial measuring meter are fixed by means of a mutually-matched buckle structure or interference fit on the surface of the through hole and the surface of the axial measuring meter, as long as the central axis of the measuring head of the axial measuring meter coincides with the central axis of the rotating body in actual measurement and the measuring head of the axial measuring meter can contact with the outer surface of the rotating body.

Optionally, referring to fig. 2, a through hole 121 is formed in the gauge mounting base 12, when the rotating body 13 passes through the through hole 121, the measuring head 141 of the radial measuring gauge 14 and the measuring head 151 of the axial measuring gauge 15 are both in contact with the outer surface of the rotating body 13, and the central axis of the measuring head 151 of the axial measuring gauge 15 coincides with the central axis of the rotating body 13, a gap exists between the rotating body 13 and the through hole 121, so as to facilitate the rotation of the rotating body 13 in the subsequent measuring process; for example, when the rotating body 13 is a sphere, in order to facilitate the measurement of the maximum circumference of the sphere by the measuring head 141 of the radial direction measuring gauge 14 provided on the gauge mounting base 12 (because the measurement of the radial direction measuring gauge is not affected even if the sphere is translated in the direction of the rotation axis of the gantry of the radiotherapy apparatus), the diameter of the through hole may be a value larger than the diameter of the sphere. It should be noted that, the above-mentioned through hole for the rotating body may be a through hole for the entire rotating body, or a through hole for a part of the rotating body, as long as the radial measuring meter and the axial measuring meter can measure the axial play and the radial runout of the rotating body when measuring the accuracy of the isocenter of the radiotherapy apparatus in the following. In addition, when the rotating body and the reference measuring rod are connected through the connecting portion, if the rotating body completely passes through the through hole, it is necessary to ensure that a gap exists between the connecting portion and the through hole.

Optionally, when the precision measurement system is actually used, the central axis of the through hole 121 coincides with the central axis of the axial direction meter 15. Of course, when the rotating body is not a sphere, the diameter of the through hole may be changed according to the specific situation of the rotating body, for example, when the rotating body is a cylinder, the diameter of the through hole may be larger than the diameter of the cylinder, and for example, when the rotating body is a cone, the diameter of the through hole is only required to enable the cone to pass through the through hole by a certain length (for example, half of the height of the cone) and a gap exists between the two; the diameter of the through-hole is not particularly limited herein.

In the example shown in fig. 2, when the precision measuring system is used, because the rotating body 13 is a sphere 13 and can be placed in the through hole 121, the measuring tool mounting base 12 may be provided with both an axial connecting member 18 for connecting the axial measuring gauge 15, so that the measuring head 151 of the axial measuring gauge 15 contacts with the sphere 13, and the central axis of the measuring head 151 of the axial measuring gauge 15 coincides with the central axis of the sphere 13, and a radial connecting member 17 for connecting the radial measuring gauge 14, so that the measuring head of the radial measuring gauge 14 contacts with the outer surface of the sphere 13, and the central axis of the measuring head 141 of the radial measuring gauge 14 and the central axis of the measuring head 151 of the axial measuring gauge 15 are perpendicular to each other and intersect with the center of the sphere 13.

Optionally, as shown in fig. 5, when there is a through hole 121 in the measuring tool mounting seat 12, the measuring tool mounting seat 12 may also be only provided with the axial connecting member 18 to connect the axial measuring gauge 15, and the radial measuring gauge 14 may be partially disposed inside the measuring tool mounting seat 12, and may be fixed by any manner such as disposing a corresponding snap structure or interference fit on the radial measuring gauge and the measuring tool mounting seat.

It should be noted that the connection of the gauge mounting block to the radial and axial gauges shown in FIG. 2 and described in the above examples is exemplary only, and that other variations exist in practice that are intended to fall within the scope of the present invention.

Further alternatively, as shown in fig. 2, when the rotary body 13 is connected to the reference measuring stick 11, if the distance between the end of the rotary body 13 away from the reference measuring stick and the reference measuring stick is too short, the probes of the radial direction gauge 14 and the axial direction gauge 15 may not be well contacted with the outer surface of the rotary body 13 when the rotary body 13 is put into the through hole 121; when the distance between the end of the rotating body 13 far away from the reference measuring rod and the reference measuring rod is too long, if the frame drives the reference measuring rod 11 connected with the treatment head to rotate, due to the influence of gravity and centrifugal force, the bounce generated by the rotating body 13 is large, so that a large error is generated in the subsequent precision measurement on the isocenter, and therefore, optionally, the distance between the end of the rotating body 13 far away from the reference measuring rod and the reference measuring rod should be within a proper range, for example, 20mm to 40 mm; for example, referring to fig. 4, when the rotating body 13 is a sphere 13 and the sphere 13 is connected to the reference measuring rod through the connecting portion 16, the radius of the sphere 13 and the length of the connecting portion 16 need to be designed according to the appropriate range in practice; in practice, the connecting portion 16 may also be telescopic (e.g., telescoping), or may be designed to be telescopic if the rotating body is a cone or a cylinder.

Optionally, referring to fig. 6, in order to better mount the radial meter 14 and the axial meter 15, and to better fix the gauge mount 12 when the precision measurement system is in use, the precision measurement system further includes a fixing portion 122; the fixing part 122 is used for being fixedly connected with the radiotherapy equipment when the accuracy of the isocenter of the radiotherapy equipment is measured subsequently; how the radial meter 14 and the axial meter 15 are arranged in the specific gauge mounting 12 will not be described in detail here.

Optionally, in order to mount the reference measuring rod 11 on the treatment head of the radiotherapy apparatus, as shown in fig. 7, the precision measuring system further includes a connecting part 19, and one end of the reference measuring rod 11 is connected to the connecting part 19.

Alternatively, the reference gauge rods 11 in the above embodiments may be telescopic, such as a nested telescopic structure, for convenience of use.

Alternatively, as shown in fig. 6 and 7, in order to adjust the relative position relationship between the reference measuring rod 11 and the radiotherapy apparatus after being mounted on the radiotherapy apparatus, the precision measuring system further includes an adjusting device 20; one end of the reference measuring bar 11 is connected with the adjusting device 20; the adjusting device 20 is used for moving the reference measuring bar 11 along at least one direction of the X-axis direction, the Y-axis direction and the Z-axis direction; the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other, and the Z-axis direction is parallel to the central axis of the reference gauge 11.

For example, referring to fig. 6 and 7, the adjusting device 20 may be a three-dimensional slide table 20; one end of the reference measuring bar 11 is connected with the three-dimensional sliding table 20; specifically referring to fig. 8, the three-dimensional sliding table 20 includes an X-axis sliding table 201, a Y-axis sliding table 202, and a Z-axis sliding table 203; the X-axis slide table 201 is used to move the reference gauge rod 11 in the X-axis direction, the Y-axis slide table 202 is used to move the reference gauge rod 11 in the Y-axis direction, and the Z-axis slide table 203 is used to move the reference gauge rod 11 in the Z-axis direction.

For example, referring to fig. 8, the movement of the X-axis sliding table 201 may be rotationally controlled by its corresponding first fine adjustment knob 2011, the movement of the Y-axis sliding table 202 may be rotationally controlled by its corresponding second fine adjustment knob 2021, and the movement of the Z-axis sliding table 203 may be rotationally controlled by its corresponding third fine adjustment knob 2031.

As shown in fig. 6 and 7, the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other, and the Z-axis direction is parallel to the central axis of the reference measuring stick 11; specifically, the length of the reference measuring rod 11 needs to be designed according to the adjustable distance range of the three-dimensional sliding table 20 in the Z-axis direction and the rotation radius of the radiotherapy equipment rack (refer to factory parameters); of course, when the reference measuring rod 11 is retractable, the shortest length and the longest length thereof need to be designed according to the adjustable distance range of the three-dimensional sliding table 20 in the Z-axis direction and the rotation radius of the radiotherapy equipment rack (refer to factory parameters).

Optionally, as shown in fig. 7, when the accuracy of the isocenter of the radiotherapy apparatus is actually measured, the gantry of the radiotherapy apparatus needs to rotate, and if the measured value is observed by a person each time, there is an inevitable risk, so that the accuracy measurement system further includes an acquisition device 22 for better measurement and saving manpower; the radial measuring gauge 14 and the axial measuring gauge 15 are respectively provided with a wireless communication module (for example, a bluetooth module, a WiFi module, a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, etc.) for sending data measured by the radial measuring gauge and the axial measuring gauge to the acquisition device. When there are wireless communication module and precision measurement system in radial measuring meter 14 and axial measuring meter 15 and have collection system, whole process alright in order to last, do not need the reading of people's statistics measuring meter to it is more convenient, further also avoided the mistake to radiotherapy equipment when people's statistics reading to touch and lead to the measuring result inaccuracy or people and radiotherapy equipment collision lead to the injured condition.

Optionally, referring to fig. 2, in order to facilitate reading and avoid difference between readings of different people, each of the radial meter 14 and the axial meter 15 may include a screen (142-1, 142-2, and 142-3) corresponding to 14 and 152 (shown in fig. 5) corresponding to 15) having a digital display function, and specifically may be any one of the following: digital display dial indicator and digital display dial indicator. Specifically, due to high requirements on precision, a digital display dial indicator with better precision is generally selected in practice; of course, the present invention is not particularly limited thereto.

The above-described embodiment provides the precision measurement system because the precision measurement system includes: a reference measuring bar; the rotating body is arranged on the side surface of the reference measuring rod, and the central axis of the rotating body is perpendicular to and intersected with the central axis of the reference measuring rod; a measuring tool mounting base; the measuring tool comprises a measuring tool mounting seat, a radial measuring meter and an axial measuring meter, wherein the radial measuring meter and the axial measuring meter are arranged on the measuring tool mounting seat, and a central axis of a measuring head of the radial measuring meter is perpendicular to and intersected with a central axis of a measuring head of the axial measuring meter; the radial measuring meter is used for measuring the runout of the rotating body in the radial direction, and the axial measuring meter is used for measuring the runout of the rotating body in the axial direction. Therefore, when the accuracy of the isocenter of the radiotherapy equipment is measured based on the accuracy measuring system, the reference measuring rod and the measuring tool mounting seat are correspondingly mounted firstly, so that the central axis of the reference measuring rod is superposed with the beam axis of the treatment head, the central axis of the rotating body is superposed with the rotary axis of the rack of the radiotherapy equipment, measuring heads of the radial measuring meter and the axial measuring meter are both contacted with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body; after the arrangement, when the frame of the radiotherapy equipment is controlled to rotate around the rotation axis of the frame, the jumping values (radial jumping value and axial jumping value) generated by the rotating body in the whole process can be measured in real time, and the jumping value obtained by measurement can accurately reflect the accuracy of the isocenter of the radiotherapy equipment because the isocenter of the radiotherapy equipment is positioned near the intersection point of the central axis of the reference measuring rod and the central axis of the rotating body; after the radial runout data of the rotating body and the axial movement data of the rotating body are obtained, the accuracy of the isocenter of the radiotherapy equipment can be calculated according to the data. In the whole measuring process, because the error of the isocenter in the working process is converted into the jitter value of a partial structure by using a proper structure, the isocenter is suitable for measurement, and the measurement is carried out by using a measuring meter which is not the conventional manual visual measurement and cannot generate errors due to different reading modes of different people, the technical scheme provided by the embodiment of the invention is more accurate in accuracy measurement of the isocenter of radiotherapy equipment than the conventional pointing method on the whole.

Referring to fig. 9, an embodiment of the present invention further provides a method for measuring accuracy of radiotherapy equipment, which is applied to the accuracy measurement system provided in the foregoing embodiment, and includes:

801. and fixedly connecting the reference measuring bar with a target position on a treatment head of the radiotherapy equipment so as to enable the central axis of the reference measuring bar to coincide with a beam axis of the radiotherapy equipment and enable the central axis of the rotating body to coincide with a rotary axis of a rack of the radiotherapy equipment.

Illustratively, when the precision measurement system includes a connecting part, the surface of the connecting part which is not connected with the reference measuring bar is abutted to a target position on the treatment head (generally a certain position on the radiation surface of the treatment head), and the connecting part is fixed to the target position, so that the central axis of the reference measuring bar is coaxial with the beam axis of the treatment head, and the central axis of the rotator is coincident with the rotation axis of the rack, illustratively, referring to fig. 1, the 801 step makes the central axis of the reference measuring bar coincident with the beam axis of the treatment head shown in fig. 1, and the central axis of the rotator is coincident with the rotation axis of the roller shown in fig. 1, namely the rotation axis of the rack. Illustratively, referring to fig. 7, the connecting portion 19 can be connected to the radiation surface of the treatment head by bolts through threaded holes/through holes provided at four corners thereof; in addition, a buckle matched with the peripheral contour of the treatment head can be arranged on the connecting part 19, and the connecting part is clamped on the radiation surface of the treatment head through the buckle.

802. And fixing the measuring tool mounting seat at a fixed position, so that the measuring heads of the radial measuring meter and the axial measuring meter are both contacted with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body.

Illustratively, the gauge mount may be at other locations in the radiotherapy apparatus than the gantry, such as the couch, as long as it is stationary while the gantry rotates.

Specifically, the specific connection and position relationship of the precision measurement system in step 802 is shown in fig. 6 or fig. 7, which is described specifically, and reference is made to the description of fig. 6 or fig. 7 by the foregoing precision measurement system, which is not described herein again.

803. In the process that a frame of the radiotherapy equipment rotates around the rotation axis of the frame, radial runout data of the rotating body measured by a radial measuring meter and axial float data of the rotating body measured by an axial measuring meter are obtained.

Illustratively, referring to fig. 7, when the precision measurement system includes the acquisition device 22 and the radial measuring meter 14 and the axial measuring meter 15 in the precision measurement system both include a wireless communication module, the acquiring, in step 803, the radial runout data of the rotating body measured by the radial measuring meter 14 and the axial runout data of the rotating body measured by the axial measuring meter 15 includes:

receiving the radial runout data of the rotating body measured by the radial measuring meter sent by the communication module in the radial measuring meter 14 through the acquisition device 22; the data of the axial movement of the rotating body measured by the axial measuring meter 15 and sent by the communication module in the axial measuring meter 15 is received by the acquisition device 22.

Illustratively, through the control of the acquisition device, the frequency of acquiring radial run-out data and axial run-out data can be set, i.e. how often the readings of the axial measuring meter and the radial measuring meter are acquired can be set, so that the sampling frequency can be adjusted more flexibly according to the actual situation; for example, the working speed can be changed every ten minutes, and the sampling frequency can be once every 10s, so that the same sampling data can be obtained at each working speed, and then the data of various working speeds can be integrated to obtain more accurate isocenter precision data.

When the precision measurement system provided by the embodiment of the invention comprises the acquisition device, the radial measurement meter and the axial measurement meter which are provided with the communication module, the precision measurement system provided by the embodiment of the invention not only can measure the precision of the steady-state isocenter of the machine frame in the low-speed rotation process, but also can measure the precision of the working isocenter of the machine frame in the high-speed rotation process.

804. And calculating the accuracy of the isocenter of the radiotherapy equipment according to the radial run-out data and the axial float data.

Optionally, in practice, before the isocenter accuracy of the radiotherapy apparatus is measured, the radiotherapy apparatus is generally adjusted to a zero position, which is convenient for subsequent operations, so as shown in fig. 10, the step 801 may further include: 800. and (4) placing the stand of the radiotherapy equipment at a zero position.

Specifically, the zero position is an initial position, i.e., a position of the radiotherapy apparatus when the patient is not treated, and referring to fig. 15, the treatment head is generally located right above (relative to the ground); the beam axis of the treatment head is the central axis along the Z-axis direction.

Optionally, referring to fig. 10, 801 further includes:

801A, determining the target position.

Illustratively, referring to fig. 10, the step 804 specifically includes:

80411. and taking the difference value between the maximum value and the minimum value of all radial run-out values in the radial run-out data as a first target value, and taking the difference value between the maximum value and the minimum value of all axial run-out values in the axial run-out data as a second target value.

It should be noted that, as shown in fig. 3, when a cylinder is selected, the axial float data measured by the axial direction meter and the radial run-out data measured by the radial direction meter may cause an error due to the deviation of the central axis of the cylinder itself in the rotation process (which can be avoided to a certain extent by reducing the height of the cylinder), so that multiple measurements are required to perform error analysis to minimize the influence of the error on subsequent precision calculated values, and the rest of the rotating bodies are the same. The error reduction method is not described herein.

80412. Determining the diameter of the circumscribed circle of the target cube as the accuracy of the isocenter of the radiotherapy equipment; the length and width values of the target cube are both first target values, and the height value of the target cube is a second target value.

The diameter of the circumscribed circle of the specific target cube can be obtained by measuring after three-dimensional modeling, or can be directly obtained by calculating the diagonal line of the target cube, namely the diameter of the circumscribed circle.

Optionally, referring to fig. 10, when the precision measurement system includes a plurality of radial meters, 804 includes:

80421. taking the difference value between the average value of the maximum values of the radial runout values measured by all the radial measuring meters and the average value of the minimum values of the radial runout values measured by all the radial measuring meters as a first target value; and taking the difference value of the maximum value and the minimum value of all axial runout values in the axial runout data as a second target value.

80422. Determining the diameter of a circumscribed circle of the target cube as the accuracy of the isocenter of the radiotherapy equipment; the length and width values of the target cube are both first target values, and the height value of the target cube is a second target value.

Illustratively, referring to fig. 11, 801A specifically includes:

and S1, connecting one end of the reference measuring bar with a pre-selected position on the treatment head.

Wherein the preselected locations may be randomly selected.

And S2, calibrating the reference measuring bar from the pre-selected position to the target position by using the calibration measuring meter.

Exemplarily, referring to fig. 12, S2 specifically includes:

and S21, measuring a first jumping amount of the reference measuring rod in a plane perpendicular to the beam axis by using the calibration measuring meter, and adjusting the reference measuring rod to a first position in the plane according to the first jumping amount so that the jumping amount of the reference measuring rod in the plane is smaller than a first threshold value.

And S22, measuring a second runout amount of the rotating body in the beam axis direction by using the calibration measuring meter, and adjusting the reference measuring bar to a second position in the beam axis direction according to the second runout amount so as to enable the runout amount of the rotating body in the beam axis direction to be smaller than a second threshold value.

And S23, determining the target position as a position which meets the requirement of the first position on the reference measuring bar and the requirement of the second position on the rotating body.

Specifically, the step S23 may be performed all the time in practice, and for example, after the step S211-S213 corresponding to the step S21 is performed, the step S221-S224 corresponding to the step S22 is performed to establish the target position, that is, the second position is determined based on the first position determination; of course, S221-S224 may be executed first, and then S211-S213 may be executed, that is, the first position may be determined based on the second position determination.

Exemplarily, referring to fig. 13, S21 includes:

s211, the calibration measuring meter is arranged at a first preset position of the radiotherapy equipment.

When the calibration measuring meter is positioned at the first preset position, the calibration measuring meter is static relative to the treatment head when the treatment head rotates around the beam axis; the measuring head of the calibration measuring gauge is in contact with the calibration point on the outer surface of the preset part of the reference measuring bar, and the central axis of the calibration measuring gauge is perpendicular to the central axis of the reference measuring bar.

For example, the first preset position may be somewhere on the treatment couch, and is not limited herein; the connection mode of the calibration measuring meter and the first preset position of the radiotherapy equipment is not particularly limited, and the calibration measuring meter can be matched with a bolt and a screw hole or matched with a clamping groove in a buckling mode.

Specifically, the calibration measuring meter may be a digital display dial indicator or a digital display dial indicator, which is determined according to actual requirements and is not specifically limited herein.

For example, when step S211 is completed, the positional relationship between the calibration gauge 21 and the reference measuring bar 11 in the precision measuring system is shown in fig. 16, and the calibration point is any point on the outer surface of the portion of the reference measuring bar 11 near the rotating body 13.

S212, in the process that the treatment head rotates around the beam axis, updating the preselected position according to the first jumping amount of the reference measuring rod measured by the calibration measuring meter, so that the first jumping amount of the reference measuring rod measured by the calibration measuring meter is reduced.

Illustratively, when a three-dimensional sliding table exists in the precision measurement system, S212 specifically includes: controlling the therapeutic head to rotate around a beam axis, and reducing the first jumping amount of the reference measuring rod measured by the calibration measuring meter by adjusting an X-axis sliding table and a Y-axis sliding table of the three-dimensional sliding table; at the moment, the position of the X-axis sliding table and the Y-axis sliding table in the three-dimensional sliding table is changed so as to achieve the purpose of changing the position of the reference measuring rod.

Specifically, the decrease of the first runout amount of the reference measuring bar means that the central axis of the reference measuring bar and the beam axis of the treatment head tend to coincide more and more in the process of being driven to rotate, and when the central axis of the reference measuring bar and the beam axis of the treatment head decrease to be below a certain tiny value, the central axis and the beam axis can be considered to coincide.

And S213, when the first jumping amounts of the reference measuring rod measured by the calibration measuring meter in the first preset time period are all smaller than the first threshold value, determining the updated preselected position at the current moment as the first position.

Illustratively, when a three-dimensional sliding table exists in the precision measurement system, S213 is specifically: and when the jumping values of the reference measuring rod measured by the calibration measuring meter in a first preset time period are smaller than a first threshold value, the X-axis sliding table and the Y-axis sliding table are locked, and the rotation of the treatment head is stopped.

Illustratively, the first threshold may be 0.01 mm; the specific numerical value can be determined according to actual requirements, which is only an example, however, when the numerical values of the first threshold are different, the division values of the adopted calibration dial indicators are different; for example, if the first threshold value is 0.01mm, the calibration meter can only be a dial meter or a meter with a smaller graduation value.

Exemplarily, referring to fig. 13, S22 includes:

and S221, adjusting the position of the reference measuring rod to enable the central axis of the rotating body to be parallel to the rotation axis of the rack.

Since it is necessary to adjust the center axis of the rotating body to coincide with the rotation axis of the gantry next, step S221 needs to be present.

And S222, setting the calibration measuring meter at a second preset position of the radiotherapy equipment.

When the calibration measuring meter is located at the second preset position and the rack rotates around the rotation axis of the rack, the calibration measuring meter is static relative to the rack, a measuring head of the calibration measuring meter is in contact with one point on the outer surface of the rotating body, and the central axis of the measuring head of the calibration measuring meter is parallel to the central axis of the reference measuring rod; and the central axis of the measuring head of the calibration measuring meter is perpendicular to and intersected with the central axis of the rotating body.

For example, the second preset position may be somewhere on the treatment couch, and is not limited herein; the connection mode of the calibration measuring meter and the second preset position of the radiotherapy equipment is not particularly limited, and the calibration measuring meter can be matched with a bolt and a screw hole or matched with a clamping groove in a buckling mode.

For example, when step S222 is completed, the positional relationship between the calibration gauge 21 and the rotator 13 in the precision measuring system is shown in fig. 17.

And S223, in the process that the frame rotates around the rotation axis of the frame, updating the preselected position according to the second jumping amount of the rotating body measured by the calibration measuring meter, so that the second jumping amount of the rotating body measured by the calibration measuring meter is reduced.

Illustratively, when a three-dimensional sliding table exists in the precision measurement system, S223 specifically includes: the control frame rotates around the rotation axis of the control frame, and the second jumping quantity of the rotating body measured by the calibration measuring meter is reduced by adjusting the Z-axis sliding table of the three-dimensional sliding table; at the moment, the position of the Z-axis sliding table in the three-dimensional sliding table is changed to achieve the purpose of changing the position of the reference measuring rod.

Specifically, the reduction of the second bounce amount of the rotating body means that the central axis of the rotating body and the revolving axis of the rack tend to coincide more and more in the process that the rotating body is driven to rotate, and when the central axis of the rotating body and the revolving axis of the rack are reduced to be below a certain tiny value, the central axis and the revolving axis can be considered to coincide.

And S224, when the second jumping quantities of the rotating body measured by the calibration measuring meter in the second preset time period are all smaller than a second threshold value, determining the updated preselected position at the current moment as a second position.

Illustratively, when a three-dimensional sliding table exists in the precision measurement system, S224 is specifically: and when the second jumping quantity of the rotating body measured by the calibration measuring meter in a second preset time period is smaller than a second threshold value, locking the Z-axis sliding table and stopping the rotation of the rack.

Illustratively, the second threshold may be 0.01 mm; the specific numerical value can be determined according to actual requirements, which is only an example, however, when the numerical values of the second threshold are different, the division values of the adopted calibration dial indicators are different; for example, if the second threshold is 0.01mm, the calibration meter can only be a dial meter or a meter with a smaller graduation value.

In embodiments provided by the present invention, the update of all positions (preselected position, first position, and second position) may be a manual movement update when a three-dimensional sliding table is not present in the precision measurement system.

Optionally, as shown in fig. 14, when steps S211 to S213 are executed first and then steps S221 to S224 are executed to complete step S2, in order to ensure that the calibration effect on the reference measuring stick does not change due to the second calibration, the step S224 further includes:

and S3, after the calibration measuring gauge is arranged at the first preset position of the radiotherapy equipment, the jitter value of the reference measuring rod is measured by using the calibration measuring gauge in the process that the treatment head rotates around the beam axis.

And S4, judging whether the jitter values of the reference measuring stick measured by the calibration measuring meter in the first preset time period in the rotation process of the treatment head are all smaller than a first threshold value.

When the jumping values of the reference measuring stick measured by the calibration measuring meter in the first preset time period in the rotation process of the treatment head are determined to be not smaller than the first threshold value, S1 is executed again; when the jump values of the reference measuring stick measured by the calibration measuring meter in the first preset time period in the rotation process of the treatment head are all determined to be smaller than the first threshold value, 801 is executed (not shown in fig. 14).

Further optionally, referring to fig. 14, when steps S221 to S224 are executed first and then steps S211 to S213 are executed to complete step S2, in order to ensure that the calibration effect on the reference measuring stick does not change due to the second calibration, step S213 further includes:

and S3, adjusting the position of the reference measuring bar so that the central axis of the rotating body is parallel to the rotation axis of the frame.

And S4, after the calibration measuring meter is arranged at the second preset position of the radiotherapy equipment, measuring the runout value of the rotating body by using the calibration measuring meter in the process that the rack rotates around the rotation axis of the rack.

And S5, judging whether the jumping values of the rotating body measured by the calibration measuring meter in a second preset time period in the rotating process of the rack are all smaller than a second threshold value.

When it is determined that the fluctuation value of the rotating body measured by the calibration measuring meter in the second preset time period during the rotation of the gantry is not uniform and is less than the second threshold value, re-executing S1; when it is determined that the runout values of the rotating body measured by the calibration measuring meter during the rotation of the gantry within the second preset time period are all smaller than the second threshold value, 801 is executed (not shown in fig. 14).

To sum up, the accuracy measurement system and the isocenter accuracy measurement method of radiotherapy equipment provided by the embodiment of the invention are characterized in that the accuracy system comprises: a reference measuring bar; the rotating body is arranged on the side surface of the reference measuring rod, and the central axis of the rotating body is perpendicular to and intersected with the central axis of the reference measuring rod; a measuring tool mounting base; the measuring tool comprises a measuring tool mounting seat, a radial measuring meter and an axial measuring meter, wherein the radial measuring meter and the axial measuring meter are arranged on the measuring tool mounting seat, and a central axis of a measuring head of the radial measuring meter is perpendicular to and intersected with a central axis of a measuring head of the axial measuring meter; the radial measuring meter is used for measuring the runout of the rotating body in the radial direction, and the axial measuring meter is used for measuring the runout of the rotating body in the axial direction. Therefore, when the accuracy of the isocenter of the radiotherapy equipment is measured based on the accuracy measuring system, the reference measuring rod and the measuring tool mounting seat are correspondingly mounted firstly, so that the central axis of the reference measuring rod is superposed with the beam axis of the treatment head, the central axis of the rotating body is superposed with the rotary axis of the rack of the radiotherapy equipment, measuring heads of the radial measuring meter and the axial measuring meter are both contacted with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body; after the arrangement, when the frame of the radiotherapy equipment is controlled to rotate around the rotation axis of the frame, the jumping values (radial jumping value and axial jumping value) generated by the rotating body in the whole process can be measured in real time, and the jumping value obtained by measurement can accurately reflect the accuracy of the isocenter of the radiotherapy equipment because the isocenter of the radiotherapy equipment is positioned near the intersection point of the central axis of the reference measuring rod and the central axis of the rotating body; after the radial runout data of the rotating body and the axial movement data of the rotating body are obtained, the accuracy of the isocenter of the radiotherapy equipment can be calculated according to the data. In the whole measuring process, because the error of the isocenter in the working process is converted into the jitter value of a partial structure by using a proper structure, the isocenter is suitable for measurement, and the measurement is carried out by using a measuring meter which is not the conventional manual visual measurement and cannot generate errors due to different reading modes of different people, the technical scheme provided by the embodiment of the invention is more accurate in accuracy measurement of the isocenter of radiotherapy equipment than the conventional pointing method on the whole.

Referring to fig. 18, an embodiment of the present invention further provides an isocenter accuracy measuring apparatus for a radiotherapy apparatus, which may be included in the isocenter accuracy measuring system for a radiotherapy apparatus. The measuring device comprises a memory 41, a processor 42, a bus 43 and a communication interface 44; the memory 41 is used for storing computer execution instructions, and the processor 42 is connected with the memory 41 through a bus 43; when the isocenter accuracy measuring apparatus of the radiotherapy equipment runs, the processor 42 executes computer-executable instructions stored in the memory 41, so that the isocenter accuracy measuring apparatus of the radiotherapy equipment performs the 803 and 804 steps (80411 and 80412 or 80421 and 80422) in the isocenter accuracy measuring method of the radiotherapy equipment provided in the above embodiments.

In particular implementations, processor 42(42-1 and 42-2) may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 4, for example, as one embodiment. And as an example, the isocenter accuracy measurement apparatus of the radiotherapy apparatus may include a plurality of processors 42, such as processor 42-1 and processor 42-2 shown in fig. 4. Each of the processors 42 may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). Processor 42 may refer herein to one or more devices, circuits, and/or processing cores that process data (e.g., computer program instructions).

The Memory 41 may be, but is not limited to, a read-only Memory 41 (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only Memory (EEPROM), a compact disc read-only Memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 41 may be self-contained and coupled to the processor 42 via a bus 43. The memory 41 may also be integrated with the processor 42.

In a specific implementation, the memory 41 is used for storing data in the present application and computer-executable instructions corresponding to software programs for executing the present application. The processor 42 may operate or execute software programs stored in the memory 41 and invoke the data stored in the memory 41 and various functions of a central accuracy measuring device, such as a radiotherapy device.

The communication interface 44 is any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and the like. The communication interface 44 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The bus 43 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus 43 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 4, but this does not indicate only one bus or one type of bus.

An embodiment of the present invention further provides a computer storage medium, where the computer storage medium includes a computer execution instruction, and when the computer execution instruction runs on a computer, the computer is enabled to execute the 803 and 804 steps (80411 and 80412 or 80421 and 80422) in the method for measuring isocenter accuracy of radiotherapy equipment provided in the foregoing embodiment.

The embodiment of the present invention further provides a computer program, where the computer program can be directly loaded into a memory and contains a software code, and after the computer program is loaded and executed by a computer, the steps 803 and 804 (80411 and 80412 or 80421 and 80422) in the method for measuring isocenter accuracy of radiotherapy equipment provided in the above embodiment can be implemented.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a module or a unit may be divided into only one logic function, and another division may be implemented in practice. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An accuracy measurement system, comprising:

a reference measuring bar;

the rotating body is arranged on the side surface of the reference measuring bar, and the central axis of the rotating body is perpendicular to and intersected with the central axis of the reference measuring bar;

a measuring tool mounting base;

the measuring tool comprises a measuring tool mounting seat, a radial measuring meter and an axial measuring meter, wherein the measuring tool mounting seat is arranged on the measuring tool mounting seat;

2. The precision measurement system of claim 1, wherein the number of the radial gauges is at least two, and the central axes of the measuring heads of at least two radial gauges are perpendicular to each other.

3. The accuracy measurement system of claim 2, wherein the radial gauges are all mounted in the same plane perpendicular to a central axis of a gauge head of the axial gauge.

4. The precision measurement system of claim 1, wherein the gauge mount is provided with a through hole; when the rotating body penetrates through the through hole, the measuring head of the radial measuring meter and the measuring head of the axial measuring meter are both in contact with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body, a gap exists between the rotating body and the through hole.

5. The accuracy measurement system of claim 1, further comprising: an adjustment device;

one end of the reference measuring bar is connected with the adjusting device;

the adjusting device is used for enabling the reference measuring bar to move along at least one direction of an X-axis direction, a Y-axis direction and a Z-axis direction; the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other, and the Z-axis direction is parallel to the central axis of the reference measuring rod.

6. The accuracy measurement system of claim 5, wherein the adjustment device comprises a three-dimensional slide;

one end of the reference measuring rod is connected with the three-dimensional sliding table;

the three-dimensional sliding table comprises an X-axis sliding table, a Y-axis sliding table and a Z-axis sliding table; the X-axis sliding table is used for enabling the reference measuring rod to move along the X-axis direction, the Y-axis sliding table is used for enabling the reference measuring rod to move along the Y-axis direction, and the Z-axis sliding table is used for enabling the reference measuring rod to move along the Z-axis direction.

7. The precision measurement system of claim 1, further comprising an acquisition device;

the radial measuring meter and the axial measuring meter are provided with wireless communication modules for sending measured data to the acquisition device.

8. The precision measurement system of claim 1, wherein the radial measurement gauge and the axial measurement gauge are any one of: dial indicator and dial indicator.

9. An isocenter accuracy measurement method of a radiotherapy apparatus, applied to an accuracy measurement system according to any one of claims 1 to 8, comprising:

when the central axis of the reference measuring rod is superposed with the beam axis of the radiotherapy equipment, the central axis of the rotating body is superposed with the rotary axis of the rack of the radiotherapy equipment, the radial measuring meter and the measuring head of the axial measuring meter are both contacted with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body, the radial runout data of the rotating body measured by the radial measuring meter and the axial float data of the rotating body measured by the axial measuring meter are obtained in the rotating process of the rack of the radiotherapy equipment;

10. The method for measuring isocenter accuracy of a radiotherapy apparatus according to claim 9, wherein the acquiring radial runout data of the rotating body measured by the radial measuring gauge and axial play data of the rotating body measured by the axial measuring gauge during rotation of a gantry of the radiotherapy apparatus further comprises:

fixedly connecting the reference measuring bar with a target position on a treatment head of the radiotherapy equipment so as to enable the central axis of the reference measuring bar to coincide with a beam axis of the radiotherapy equipment and enable the central axis of the rotating body to coincide with a rotary axis of a rack of the radiotherapy equipment;

and fixing the measuring tool mounting seat at a fixed position, so that the measuring heads of the radial measuring meter and the axial measuring meter are in contact with the outer surface of the rotating body, and the central axis of the measuring head of the axial measuring meter is superposed with the central axis of the rotating body.

11. The method for measuring isocenter accuracy of a radiotherapy apparatus according to claim 10, wherein before the step of fixedly connecting the reference gauge bar to the target position on the treatment head of the radiotherapy apparatus, the method further comprises: the target location is determined.

12. The isocenter accuracy measurement method of a radiotherapy apparatus of claim 11, wherein the determining the target position comprises:

connecting one end of the reference measuring bar with a preselected position on the treatment head;

calibrating the reference gauge bar from the preselected position to the target position using a calibration gauge.

13. The isocentric accuracy measurement method of a radiotherapy apparatus of claim 12, wherein the calibrating the reference gauge bar from the pre-selected position to the target position using a calibration gauge comprises:

measuring a first jumping amount of the reference measuring rod in a plane perpendicular to the beam flow axis by using the calibration measuring meter, and adjusting the reference measuring rod to a first position in the plane according to the first jumping amount so that the jumping amount of the reference measuring rod in the plane is smaller than a first threshold value;

measuring a second runout amount of the rotating body in the beam axis direction by using the calibration measuring meter, and adjusting the reference measuring bar to a second position in the beam axis direction according to the second runout amount so as to enable the runout amount of the rotating body in the beam axis direction to be smaller than a second threshold value;

the target position is determined as a position that meets the requirement of the first position for the reference stick and the requirement of the second position for the rotating body.

14. The method of claim 9, wherein the calculating the accuracy of the isocenter of the radiotherapy apparatus from the radial run-out data and the axial float data comprises:

taking the difference value between the maximum value and the minimum value of all radial run-out values in the radial run-out data as a first target value, and taking the difference value between the maximum value and the minimum value of all axial run-out values in the axial run-out data as a second target value;

determining the diameter of a circumscribed circle of a target cube as the accuracy of the isocenter of the radiotherapy equipment; the values of the length and width of the target cube are both the first target value and the value of the height of the target cube is the second target value.

15. The isocenter accuracy measurement method of a radiotherapy apparatus of claim 9, wherein when the accuracy measurement system comprises at least two radial gauges, the calculating the accuracy of the isocenter of the radiotherapy apparatus from the radial run-out data and the axial float data comprises:

taking the difference value between the average value of the maximum values of the radial runout values measured by all the radial measuring meters and the average value of the minimum values of the radial runout values measured by all the radial measuring meters as a first target value; taking the difference value between the maximum value and the minimum value of all axial runout values in the axial runout data as a second target value;

determining the diameter of a circumscribed circle of a target cube as the accuracy of the isocenter of the radiotherapy equipment; the length and width values of the target cube are both the first target value, and the height value of the target cube is the second target value.

16. An isocenter accuracy measuring device of a radiotherapy apparatus, comprising: a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the radiotherapy apparatus isocenter accuracy measurement apparatus is in operation, the processor executes computer-executable instructions stored in the memory to cause the radiotherapy apparatus isocenter accuracy measurement apparatus to perform the radiotherapy apparatus isocenter accuracy measurement method of claim 9 or 14 or 15.

17. A computer storage medium comprising computer executable instructions which, when executed on a computer, cause the computer to perform the method of isocentric accuracy measurement of a radiotherapy apparatus of claim 9 or 14 or 15.