CN116907345B - Device and method for verifying consistency between imaging center and mechanical center of imaging system - Google Patents
Device and method for verifying consistency between imaging center and mechanical center of imaging systemInfo
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- CN116907345B CN116907345B CN202310994596.0A CN202310994596A CN116907345B CN 116907345 B CN116907345 B CN 116907345B CN 202310994596 A CN202310994596 A CN 202310994596A CN 116907345 B CN116907345 B CN 116907345B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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Abstract
The application relates to a device and a method for verifying consistency between an imaging center and a mechanical center of an imaging system, which relate to the technical field of auxiliary equipment of the imaging system and comprise an operation platform, wherein a mechanical center indicating assembly, a mechanical center marking assembly and an imaging center indicating assembly are arranged on the operation platform, the imaging center indicating assembly is connected with an imaging center adjusting mechanism, the mechanical center in a space is found by using the mechanical center indicating assembly, the mechanical center is marked by using the mechanical center marking assembly, the position of the imaging center indicating assembly is adjusted to enable the positions marked by the imaging center indicating assembly and the mechanical center marking assembly to coincide, an imaging object is imaged by using an imaging system at the moment, errors between the imaging center and the mechanical center are the errors of the imaging system, and in the follow-up image guided radiotherapy by using the imaging system, the imaging of the imaging system can be corrected by using the errors obtained by verification, so that the imaging errors of the imaging system are effectively reduced.
Description
Technical Field
The application relates to the technical field of auxiliary equipment of an image system, in particular to a device and a method for verifying consistency of an imaging center and a mechanical center of the image system.
Background
Image Guided Radiotherapy (IGRT), which is a four-dimensional radiotherapy technique, adds a concept of time factors on the basis of three-dimensional radiotherapy, monitors tumors and normal organs in real time by using various advanced image equipment before and during treatment of patients, can correct errors caused by positioning, organ movement and tumor volume change during radiotherapy, and can adjust treatment conditions according to the change of organ positions to enable an irradiation field to closely follow a target area, so that truly accurate treatment can be achieved.
Along with the application of the image guided radiotherapy technology in clinic, the accuracy of the imaging position of the image system is particularly important, the error of the imaging position of the image system mainly comes from the deviation between the imaging center and the mechanical center, the verification of the imaging center and the mechanical center is carried out by aligning a die body or a tool by an indoor laser line at present, then imaging is carried out, the imaged image center is the deviation between the imaging center and the mechanical center, then the deviation value is added in a configuration file of the image system, imaging is carried out again until the coordinate of the image center is the origin coordinate, the deviation of the laser line is introduced by the method, and a user always has the existence of the deviation when using the image guidance, and the accuracy of imaging and the therapeutic effect of radiotherapy are influenced.
Disclosure of Invention
In order to reduce imaging errors of an imaging system, the application provides a device and a method for verifying consistency between an imaging center and a mechanical center of the imaging system.
The application provides a consistency verification device for an imaging center and a mechanical center of an image system, which adopts the following technical scheme:
The utility model provides an imaging system imaging center and machinery center consistency verifying attachment, includes operation platform, be provided with on the operation platform and be used for instructing the interior machinery center of space mechanical center instruct the subassembly, be used for marking out the machinery center mark subassembly and be used for instructing imaging system imaging center's imaging center instruct the subassembly, imaging center instruct the subassembly to connect be provided with be used for adjusting imaging center instructs the imaging center adjustment mechanism of subassembly position.
Through adopting above-mentioned technical scheme, utilize the mechanical center to instruct the subassembly to find the mechanical center in the space earlier, and mark it as the origin of coordinates, utilize the mechanical center mark subassembly to mark out the mechanical center in the space, adjust the position that imaging center adjustment mechanism and then adjust imaging center and instruct the subassembly, make imaging center instruct the subassembly to overlap with the position that mechanical center marks the subassembly mark out, use image system to image the formation of image object this moment, the error between the coordinate of imaging center and the origin of coordinates is image system's error, in follow-up image guidance radiotherapy that utilizes image system, can utilize the error that this verification obtained to revise image system's, image system's error has effectively been reduced.
Optionally, the mechanical center indicating component is configured as a laser tracking measurement component, and the laser tracking measurement component comprises a reflecting mirror for indicating the mechanical center and a laser tracker;
the laser tracker is also connected with a computer in a data way, and the spatial position information of the reflector is output to the computer.
By adopting the technical scheme, the reflector is placed on the surface of an object, the glass mirror of the reflector is rotated to enable the glass mirror of the reflector to receive the laser line sent by the laser tracker, the coordinate value of the center point of the reflector can be displayed on a computer connected with the laser tracker in real time, and when the coordinate value displayed by the computer is (0, 0), the center of the reflector is overlapped with the mechanical center, and then the reflector is positioned to the mechanical center point.
Optionally, the mechanical center marking component comprises a first laser marking piece and a second laser marking piece, and laser emitted by the first laser marking piece and the second laser marking piece intersect and form a laser marking point;
The mechanical center marking assembly further comprises two groups of three-dimensional adjusting mechanisms, wherein the two groups of three-dimensional adjusting mechanisms are respectively arranged below the first laser marking piece and the second laser marking piece and are used for adjusting the positions of the first laser marking piece and the second laser marking piece in a three-dimensional space.
Through adopting above-mentioned technical scheme, the three-dimensional adjustment mechanism that sets up through first laser marking piece and second laser marking piece below carries out the accurate regulation to the position of two laser marking pieces, and then carries out the accurate regulation to the laser marking point position, ensures that the position of laser marking point and the mechanical center point that the mechanical center instruction subassembly pointed out overlap as far as, marks the mechanical center in the space as far as possible accurately, makes things convenient for the follow-up operation.
Optionally, the three-dimensional adjustment mechanism includes a three-dimensional fine adjustment platform, and a first direction adjustment knob, a second direction adjustment knob, and a third direction adjustment knob are disposed on the three-dimensional fine adjustment platform.
Through adopting above-mentioned technical scheme, adjust the knob of three direction can the accurate motion axis of adjusting on the three-dimensional fine setting platform to fine setting first laser marking piece and second laser marking piece send laser in three ascending position and gesture, with the accurate location and the alignment of realization laser marking point, satisfy the application demand that image system precision verified high accuracy, high requirement.
Optionally, the imaging center indication assembly includes an indication member, a pointer and a pointer base, where the pointer is arranged along a vertical direction and connects the indication member and the pointer base;
The pointer is connected with the pointer base through a threaded connection section, a threaded connection groove is formed in the pointer base, and the pointer is in threaded connection with the pointer base;
The pointer base is connected with the imaging center adjusting mechanism.
Through adopting above-mentioned technical scheme, can adjust the degree of pointer screw in pointer base through the mode of rotatory pointer, and then adjust the pointer in the ascending height of vertical direction for the indicator on pointer top can nimble, finely adjust the height, in order to make things convenient for the accurate indication imaging center.
Optionally, the indicator is spherical, the pointer is conical, and the indicator is arranged at the vertex of the pointer;
a unidirectional adjusting mechanism is further arranged between the pointer base and the imaging center adjusting mechanism, and a horizontal adjusting knob is arranged on the unidirectional adjusting mechanism.
Through adopting above-mentioned technical scheme, because the indicator is spherically, when rotatory adjustment pointer height, can not influence the central point of indicator put, avoid adjusting repeatedly, the one-way adjustment mechanism that sets up between pointer base and the imaging center adjustment mechanism cooperatees with the screw thread adjustment of pointer bottom, can adjust the position of pointer especially indicator in three-dimensional space, realizes the accurate positioning and the instruction to imaging center.
Optionally, imaging center adjustment mechanism includes the base that slides, be provided with the guide bar on the base that slides, the slip is worn to be equipped with the slip table on the guide bar, be provided with on the slip table and be used for adjusting the slip adjust knob of slip table position on the base that slides, the slip table is connected with speculum base, pointer base.
Through adopting above-mentioned technical scheme, can make the slip table slide along the setting direction of guide bar on the slip base through rotatory adjust knob that slides, adjust the position of slip table to adjust the position of speculum, pointer on the slip table.
Optionally, the sliding base is provided with scale marks for marking the position of the sliding table on the sliding base.
Through adopting above-mentioned technical scheme, the position of slip table on the base is slided in the convenient mark of scale mark when measuring each time, when repeated test verifies machinery center and imaging center deviation, reduces the operation of repeated debugging verification, improves the efficiency of central point consistency test.
A consistency verification method for an imaging center and a mechanical center of an image system comprises the following steps:
confirming a mechanical center point in the space;
marking a mechanical center point within the space;
Placing the imaging object on a mechanical center point, so that characteristic points on the imaging object coincide with the mechanical center point;
And imaging the imaging object by using an imaging system, and verifying consistency of an imaging center and a mechanical center.
Optionally, the imaging object using the imaging system, verifying consistency of an imaging center and a mechanical center, includes:
reading the coordinates of a mechanical center point in the space;
imaging the imaging object by using an imaging system, and reading the coordinates of an imaging center point;
The difference between the coordinates of the imaging center point and the coordinates of the mechanical center point is the deviation between the imaging center and the mechanical center.
By adopting the technical scheme, the mechanical center in the space is found firstly and is marked as the coordinate origin, the mechanical center in the space is marked by means of laser marking and the like, an imaging object is placed on the marked mechanical center point, the specific method is that a certain characteristic point of the imaging object is overlapped with the mechanical center point, the characteristic point needs to be provided with the characteristic that can be highlighted in an image system, the imaging object is conveniently observed and recognized by an operator, the image system is used for imaging the imaging object, the coordinates of the characteristic point are the coordinates of the imaging center, the error between the coordinates of the imaging center and the coordinate origin is the error of the image system, and in the follow-up image guided radiotherapy by the image system, the imaging of the image system can be corrected by the error obtained by verification, so that the imaging error of the image system is effectively reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. Through imaging center and mechanical center consistency verifying device of image system, utilize mechanical center to instruct the subassembly to find the mechanical center in the space earlier, and mark it as the origin of coordinates, utilize mechanical center mark subassembly to mark the mechanical center in the space, adjust imaging center adjustment mechanism and then adjust imaging center and instruct the position of subassembly, make imaging center instruct the subassembly and overlap with the position that mechanical center mark subassembly marks out, use image system to image the formation of image object this moment, the error between imaging center's coordinate and the origin of coordinates is the error of image system, in the follow-up image guidance radiotherapy that utilizes image system, can utilize the error that this verification obtained to revise the formation of image system, effectively reduce the error that image system formed.
2. Through setting up multiunit adjustment mechanism, operating personnel can accurate adjustment indicator and speculum position in three-dimensional space to accurate verification imaging center and mechanical center's uniformity, and then carry out accurate correction to the imaging when follow-up operation.
Drawings
FIG. 1 is an overall schematic of the present application;
FIG. 2 is a schematic view of a first laser marking element and a three-dimensional adjustment mechanism of the present application;
FIG. 3 is an overall schematic of an imaging center indicating assembly and an imaging center adjustment mechanism of the present application;
FIG. 4 is an overall schematic of the pointer of the present application;
Fig. 5 is a flow chart of the steps of the present application.
Reference numeral 0, operating platform; the device comprises a mechanical center indicating assembly, 11 parts, a reflector, 12 parts, a laser tracker, 2 parts, a mechanical center marking assembly, 21 parts, a first laser marking part, 22 parts, a second laser marking part, 23 parts, a three-dimensional adjusting mechanism, 231 parts, a first direction adjusting knob, 232 parts, a second direction adjusting knob, 233 parts, a third direction adjusting knob, 3 parts, an imaging center indicating assembly, 31 parts, 32 parts, a pointer, 321 parts, a threaded connecting section, 33 parts, a pointer base, 34 parts, a one-way adjusting mechanism, 341 parts, a horizontal adjusting knob, 4 parts, an imaging center adjusting mechanism, 41 parts, a sliding base, 42 parts, a guide rod, 43 parts, a sliding table, 44 parts and a sliding adjusting knob.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. As part of this specification, some of the drawings of the present disclosure represent structures and devices in block diagram form in order to avoid obscuring the principles of the disclosure. In the interest of clarity, not all features of an actual implementation are necessarily described. Furthermore, the language used in the present disclosure has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter, resort to the requisite claims to determine such inventive subject matter. Reference in the present disclosure to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and multiple references to "one embodiment" or "an embodiment" should not be understood as necessarily all referring to the same embodiment.
The terms "a," "an," and "the" are not intended to refer to a singular entity, but rather include the general class of which a particular example may be used for illustration, unless clearly defined. Thus, the use of the terms "a" or "an" may mean any number of at least one, including "one", "one or more", "at least one", and "one or more than one". The term "or" means any of the alternatives and any combination of alternatives, including all alternatives, unless alternatives are explicitly indicated as mutually exclusive. The phrase "at least one of" when combined with a list of items refers to a single item in the list or any combination of items in the list. The phrase does not require all of the listed items unless specifically so defined. The embodiment of the application discloses a device for verifying consistency between an imaging center and a mechanical center of an image system, which is shown by referring to fig. 1, and comprises an operation platform 0, wherein the operation platform 0 is provided with a mechanical center indicating assembly 1, a mechanical center marking assembly 2 and an imaging center indicating assembly 3, the imaging center indicating assembly 3 is connected with an imaging center adjusting mechanism 4 which is used for adjusting the position of the imaging center indicating assembly 3, the mechanical center in a space is firstly found by using the mechanical center indicating assembly 1, the mechanical center is marked by using the mechanical center marking assembly 2, the imaging center adjusting mechanism 4 is adjusted to further adjust the position of the imaging center indicating assembly 3, so that the positions marked by the imaging center indicating assembly 3 and the mechanical center marking assembly 2 are overlapped, an imaging object is imaged by using an imaging system at the moment, the error between the coordinates of the imaging center and the coordinates of the mechanical center is the error of the imaging system, and in the follow-up image guiding radiotherapy by using the imaging system, the imaging of the imaging system can be corrected by using the error obtained by the verification, and the imaging error of the imaging system is effectively reduced.
In detail, as shown in fig. 1 in combination with fig. 3, in an embodiment of the present application, the mechanical center indicating assembly 1 is configured as a laser tracking measurement assembly comprising a laser tracker 12 and a mirror 11.
The laser tracker 12 is also connected with a computer, and outputs spatial position information of the reflecting mirror 11, namely coordinate values of the central position of the reflecting mirror 11, to the computer.
The reflecting mirror 11 is a spherical object, 3 mutually perpendicular glass lenses are arranged in the reflecting mirror 11, the reflecting mirror 11 is placed on the surface of the object when the reflecting mirror is used, the reflecting mirror 11 can rotate, the glass mirror of the reflecting mirror 11 receives a laser ray emitted by the laser tracker 12, the coordinate value of the central point of the reflecting mirror 11 can be displayed on a computer connected with the laser tracker 12 in real time through software, when the coordinate value displayed by the software is (0, 0), the center of the reflecting mirror 11 coincides with the mechanical central point, the device is placed on a treatment bed surface, the coordinate value of the central point of the reflecting mirror 11 is (0, 0) through moving the treatment bed and matching with the real-time display of the coordinate of the reflecting mirror 11, and the reflecting mirror 11 is positioned to the mechanical central point through the method.
When the laser tracker 12 is used, the center point of the reflecting mirror 11 is required to be marked, when laser irradiates the center point of the non-reflecting mirror 11, the laser can be reflected mutually among the three glass lenses, a plurality of laser lines appear, and when the laser irradiates the center point of the reflecting mirror 11, only one laser point is displayed on the reflecting mirror 11, so that the laser tracker 12 can conveniently and accurately mark the center point of the reflecting mirror 11 by rotating and adjusting the reflecting mirror 11.
As shown in fig. 1-2, the mechanical center marking assembly 2 includes a first laser marking element 21 and a second laser marking element 22, where the lasers emitted by the first laser marking element 21 and the second laser marking element 22 intersect at a certain angle and form a laser marking point, and in the embodiment of the present application, the first laser marking element 21 and the second laser marking element 22 are configured as a laser pen, which has advantages of high brightness, long range, and small size. Meanwhile, the laser beam emitted by the laser pen is a thin line and can be accurately directed to the target. The two laser pens are preferably arranged in an orthogonal mode, and an operator can observe and adjust the laser pens conveniently.
The mechanical center marking assembly 2 further comprises two groups of three-dimensional adjusting mechanisms 23, the two groups of three-dimensional adjusting mechanisms 23 are respectively arranged below the first laser marking piece 21 and the second laser marking piece 22, the positions of the first laser marking piece 21 and the second laser marking piece 22 in a three-dimensional space are adjusted, the three-dimensional adjusting mechanisms 23 are specifically configured as three-dimensional fine adjustment platforms, the three-dimensional fine adjustment platforms comprise bases and three-directional sliding platforms, and the three-dimensional fine adjustment platforms further comprise fine adjustment components composed of fine adjustment screws, worm gear mechanisms, piezoelectric ceramics and the like, and the three-dimensional fine adjustment mechanism has the advantages of high-precision positioning, multi-axis adjustment, stability, rigidity and the like and is suitable for applications requiring fine-size object positioning and fine adjustment.
The three-dimensional fine adjustment platform is provided with the first direction adjusting knob 231, the second direction adjusting knob 232 and the third direction adjusting knob 233, and the three direction adjusting knobs are respectively used for adjusting three directions of an X-axis and a Y-axis and can accurately adjust laser marking points by rotating the three direction adjusting knobs, so that the positions of the laser marking points are ensured to be overlapped with the mechanical center points indicated by the mechanical center indicating assembly 1 as much as possible, the mechanical center in the space is marked as much as possible accurately, and the follow-up operation is convenient, so that the application requirements of high precision and high requirement of the accuracy verification of an image system are met.
As shown in fig. 3-4, the imaging center indication assembly 3 includes an indication member 31, a pointer 32 and a pointer base 33, the pointer 32 is disposed along a vertical direction, the indication member 31 is connected with the pointer base 33, a threaded connection section 321 is disposed at one end of the pointer 32, which is connected with the pointer base 33, a threaded connection groove is disposed on the pointer base 33, the pointer 32 is in threaded connection with the pointer base 33, the degree of screwing the pointer 32 into the pointer base 33 can be adjusted by rotating the pointer 32, and then the height of the pointer 32 in the vertical direction is adjusted, so that the indication member 31 at the top end of the pointer 32 can flexibly and finely adjust the height.
The pointer base 33 is connected with the imaging center adjusting mechanism 4, and the spatial position of the imaging center indicating assembly 3 can be adjusted by adjusting the imaging center adjusting mechanism 4.
Specifically, as shown in fig. 4, the indicator 31 is spherical, the pointer 32 is conical, and is used for carrying the indicator 31, and the pointer 32 may also be in other shapes, such as a cylinder, a cube, and a hexahedron. It is particularly pointed out that the material density of the indicator 31 needs to be higher than the pointer 32 used to carry it, so that the coordinates of the centre point of this indicator 31 can be read out on the imaged image. In the embodiment of the present application, the ball indicator 31 is made of a metal material, or other materials with higher density may be selected.
The indicator 31 is arranged at the vertex of the pointer 32, and because the indicator 31 is spherical, the sphere center is the imaging center indicated by the indicator 31, and the central position of the indicator 31 is not affected when the height of the pointer 32 is adjusted in a rotating way, repeated adjustment is avoided, and verification efficiency is improved.
In other embodiments, the indicator 31 may be configured as an intersection formed by the intersection of two or more metal strip segments, so long as the imaging center position can be conveniently indicated in the imaging system.
As shown in fig. 3, a unidirectional adjustment mechanism 34 is further disposed between the pointer base 33 and the imaging center adjustment mechanism 4, the unidirectional adjustment mechanism 34 is configured as a unidirectional fine adjustment platform, a horizontal adjustment knob 341 is disposed on the unidirectional fine adjustment platform, so that the precise positions of the pointer 32 and the indicator 31 in the linear direction can be adjusted, and the precise positioning and indication of the imaging center can be realized by combining the height adjustment of the pointer 32.
As shown in fig. 3, the imaging center adjusting mechanism 4 comprises a sliding base 41, a guide rod 42 is arranged on the sliding base 41, a sliding table 43 is arranged on the guide rod 42 in a sliding way, a sliding adjusting knob 44 for adjusting the position of the sliding table 43 on the sliding base 41 is arranged on the sliding table 43, and the sliding table 43 is connected with the base of the reflecting mirror 11 and the pointer base 33. The sliding table 43 can slide on the sliding base 41 along the setting direction of the guide rod 42 by rotating the sliding adjustment knob 44, and the position of the sliding table 43 is adjusted, so that the positions of the reflecting mirror 11 and the pointer 32 on the sliding table 43 are adjusted.
In order to reduce repeated debugging and verification operations when the repeated test verifies the deviation between the mechanical center and the imaging center and improve the efficiency of the center point consistency test, the sliding base 41 is provided with scale marks for marking the positions of the sliding table 43 on the sliding base 41, the scale marks facilitate marking the positions of the sliding table 43 on the sliding base 41 during each measurement, and recording is also facilitated during each verification of consistency.
The method for verifying consistency between the imaging center and the mechanical center of the imaging system is shown in fig. 5 and combined with fig. 1, and comprises the following steps:
S1, confirming a mechanical center point in the space. By the cooperation of the laser tracker 12 and the mirror 11, a mechanical center point in space is found and is noted as the origin of coordinates. Specifically, the mirror 11 is placed on the surface of an object, the mirror 11 is rotated, so that the glass mirror of the mirror 11 receives the laser beam emitted by the laser tracker 12, the coordinate value of the center point of the mirror 11 can be displayed on software of the laser tracker 12 in real time, when the coordinate value displayed by the software is (0, 0), the center of the mirror 11 is overlapped with the mechanical center point, the device is placed on the treatment bed surface, the mirror 11 center coordinate value is (0, 0) by moving the treatment bed and matching with the real-time display of the mirror 11 coordinate, and the mirror 11 is positioned to the mechanical center point on the treatment bed surface by the method.
S2, marking a mechanical center point in the space. The mechanical center point in the space is marked by means of laser marking or the like. The laser marking specifically uses two intersecting laser lines to reflect the spatial position of a mechanical center point, when the laser lines sent by two laser pens are on a glass mirror on the reflecting mirror 11, whether the laser lines are on the center of the reflecting mirror 11 can be judged through feedback of the laser points in the reflecting mirror 11, when the laser lines are not on the center of the reflecting mirror 11, 3 points are displayed on 3 glass mirrors of the reflecting mirror 11, and only when the laser lines are on the center of the reflecting mirror 11, one point is displayed, so that whether the laser lines are on the center of the reflecting mirror 11 is judged, the position of the laser pens can be regulated through regulating a three-dimensional fine-tuning platform, and the laser lines sent by the two laser pens can be on the center point of the reflecting mirror 11 through a first direction regulating knob 231, a second direction regulating knob 232 and a third direction regulating knob 233 on the three-dimensional fine-tuning platform, namely, the mechanical center point of S1 is found.
S3, placing the imaging object on the mechanical center point, so that the characteristic points on the imaging object are overlapped with the mechanical center point. In the embodiment of the application, the pointer 32 is an imaging object, the metal ball indicator 31 at the top end of the pointer 32 is a feature of the pointer 32, the X-axis direction can be adjusted through the sliding adjusting knob 44 of the sliding base 41, the Y-axis direction can be adjusted through the horizontal adjusting knob 341 of the unidirectional adjusting mechanism 34, the Z-axis direction can be adjusted through the threaded connecting section 321 of the rotating pointer 32, and the spherical center of the metal ball on the pointer 32 is adjusted to coincide with the mechanical center point.
Specifically, the metal ball on the pointer 32 is adjusted to the intersection point of the laser lines. The mirror 11 can be removed before adjustment, avoiding blocking the laser line.
S4, imaging the imaging object by using an imaging system, and verifying consistency of an imaging center and a mechanical center.
S4 specifically comprises the following steps:
s41, the coordinates of the mechanical center point in the space are read.
S42, imaging the imaging object by using an imaging system, and reading the coordinates of the imaging center point.
S43, the difference value between the imaging center point coordinates and the mechanical center point coordinates is the deviation between the imaging center and the mechanical center, and in the follow-up image guided radiotherapy by using the image system, the imaging of the image system can be corrected by using the error obtained by verification, so that the imaging error of the image system is effectively reduced.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.
Claims (7)
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| CN220288531U (en) * | 2023-08-08 | 2024-01-02 | 上海艾普强粒子设备有限公司 | Consistency verification device for imaging center and mechanical center of image system |
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| CN113804105B (en) * | 2021-08-17 | 2024-04-05 | 中科超精(南京)科技有限公司 | Accelerator field geometric and perspective imaging geometric coupling calibration device and method |
| CN116124002A (en) * | 2023-01-11 | 2023-05-16 | 苏州雷泰医疗科技有限公司 | Quality control system and method for medical electronic linear accelerator |
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| CN220288531U (en) * | 2023-08-08 | 2024-01-02 | 上海艾普强粒子设备有限公司 | Consistency verification device for imaging center and mechanical center of image system |
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