CN115920255A - Quality control die body structure and quality detection method - Google Patents
Quality control die body structure and quality detection method Download PDFInfo
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- CN115920255A CN115920255A CN202211588476.2A CN202211588476A CN115920255A CN 115920255 A CN115920255 A CN 115920255A CN 202211588476 A CN202211588476 A CN 202211588476A CN 115920255 A CN115920255 A CN 115920255A
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Abstract
The present disclosure provides a quality control mold structure and a quality detection method, wherein the quality control mold structure comprises: the support comprises three rotating shafts which respectively correspond to different rotational degrees of freedom and are used for realizing rotation in any angle and direction in a three-dimensional space; and the mechanical precision detection die body is used for rotating to a central axis perpendicular to a beam of quality control equipment of the non-coplanar digital radiological image guidance system under the driving action of the three rotating shafts, and performing mechanical precision detection on the quality control equipment of the non-coplanar digital radiological image guidance system based on a vernier caliper principle. And the image quality detection die body is used for rotating to a central axis which is vertical to a beam of the quality control equipment of the non-coplanar digital radiological image guiding system under the driving action of the three rotating shafts so as to detect the image quality of the quality control equipment of the non-coplanar digital radiological image guiding system. The quality control die body structure and the quality detection method can clearly detect the error result of the detected equipment, and the reliability of the detection result is higher.
Description
Technical Field
The disclosure relates to the technical field of quality detection of radiotherapy devices, in particular to a quality control module structure and a quality detection method.
Background
Radiation therapy is a discipline for the treatment of tumors using radiation. Before treatment, various imaging devices are required to perform Image guidance, so as to realize Image Guide Radiotherapy (IGRT) to irradiate a target region more accurately. Currently, electronic Portal Imaging Devices (EPIDs), cone Beam CT (CBCT), slide rail CT (CT-on-rail), digital Radiography (DR), and the like are used in IGRT. Wherein the DR equipment mainly uses fixed or mobile orthogonal coplanar equipment.
In daily clinical work, the DR equipment is used, quality control and quality assurance work are required to be carried out, so that the mechanical precision and the image quality of the equipment can meet clinical requirements, and the treatment safety of patients is guaranteed. The specific inspection items comprise translation and rotation of DR equipment, including position movement of a central shaft of an X ray, translation and rotation precision of an image detection plate; image quality, such as spatial resolution, high contrast resolution, low contrast resolution, etc. The quality control device of coplanar DR generally adopts a cubic mold body, so that X-rays can vertically enter the mold body and form images on a detection plate to perform quality control measurement.
However, some radiotherapy devices, such as the Syberknife, novalis, some proton or heavy ion treatment rooms, employ non-coplanar DR devices. The term "coplanar" means that the beam center axis of the X-ray tube of the DR apparatus and the gantry rotation plane for treatment are on the same plane, and is called non-coplanar if the beam center axis of the X-ray tube of the DR apparatus and the gantry rotation plane for treatment are not on the same plane. Non-coplanar DR devices cannot use such a phantom because the beam angle of the non-coplanar DR device is different for each treatment room, and the Source Axial Distance (SAD) and Source Image Distance (SID) are different for each treatment room. Using standard phantoms of a cube taken at different angles does not allow for a usable image.
Disclosure of Invention
In view of the above technical problems, the present disclosure provides a quality control mold structure and a quality detection method, which are used to at least partially solve the above technical problems.
Based on this, the first aspect of the present disclosure provides a quality control phantom structure, which is used for a quality control device of a non-coplanar digital radiographic image guidance system, and includes: the support comprises three rotating shafts, and the three rotating shafts correspond to different rotational degrees of freedom respectively and are used for realizing rotation in any angle and direction in a three-dimensional space; and the mechanical precision detection die body is used for rotating to a central axis perpendicular to a beam of the quality control equipment of the non-coplanar digital radiological image guiding system under the driving action of the three rotating shafts so as to detect the mechanical precision of the quality control equipment of the non-coplanar digital radiological image guiding system based on the vernier caliper principle.
According to an embodiment of the present disclosure, the material of the scaffold is a low atomic number material.
According to an embodiment of the present disclosure, the low atomic number material comprises carbon fiber.
According to this disclosed embodiment, mechanical accuracy detects the die body and includes: the substrate material is marked with scale marks, and the scale marks are filled with high atomic number materials, wherein the atomic number of the high atomic number materials is greater than that of the substrate material.
According to the embodiment of the disclosure, the scale lines comprise two crossed straight line scale lines and an arc scale line taking the intersection point of the two straight lines as the center of a circle.
According to the embodiment of the disclosure, the section of the mechanical precision detection die body is square.
The second aspect of the present disclosure provides a quality detection method based on the quality control phantom structure, where the quality detection method is used for a quality control device of a non-coplanar digital radiographic image guidance system, and the quality detection method includes: after quality control equipment of the non-coplanar digital radiographic image guidance system is installed and debugged, three rotation angles of a beam central axis relative to a coordinate system of a treatment room are obtained; installing the support at a preset position, rotating the support according to three rotation angles, and rotating the mechanical precision detection die body to be vertical to a beam central axis; and detecting the mechanical precision of the quality control equipment of the non-coplanar digital radiographic image guidance system based on the vernier caliper principle.
According to this disclosed embodiment, carry out mechanical accuracy to the quality control equipment of non-coplane digital radiography image guide system based on slide caliper principle and detect, specifically include: under the condition that the mechanical precision detection die body rotates to be vertical to the central axis of the beam, shooting an image to obtain a test piece; and (3) coinciding the test piece with the center of a reference piece stored in advance, reading based on the scale marks on the test piece and the reference piece, and calculating the mechanical error of the quality control equipment of the non-coplanar digital radiographic image guidance system according to the read scale values.
The third aspect of the present disclosure provides a quality control phantom structure, where the quality control phantom structure is used in a quality control device of a non-coplanar digital radiographic image guidance system, and the quality control phantom structure includes: the support comprises three rotating shafts, and the three rotating shafts correspond to different rotational degrees of freedom respectively and are used for realizing rotation in any angle and direction in a three-dimensional space; and the image quality detection die body is used for rotating to a central axis which is vertical to a beam of the quality control equipment of the non-coplanar digital radiological image guiding system under the driving action of the three rotating shafts so as to detect the image quality of the quality control equipment of the non-coplanar digital radiological image guiding system.
The fourth aspect of the present disclosure provides a quality detection method based on the above quality control phantom structure, where the quality detection method is used for a quality control device of a non-coplanar digital radiographic image guidance system, and the quality detection method includes: after quality control equipment of the non-coplanar digital radiographic image guidance system is installed and debugged, three rotation angles of a beam central axis relative to a coordinate system of a treatment room are obtained; mounting the bracket at a preset position, rotating the bracket according to three rotation angles, and rotating the image quality detection die body to be vertical to a beam central axis; and performing image quality detection on the quality control equipment of the non-coplanar digital radiological image guidance system based on the image quality detection die body.
According to the quality control die body structure and the quality detection method provided by the embodiment of the disclosure, the method at least comprises the following beneficial effects:
the support is composed of three rotating shafts capable of rotating along different rotational degrees of freedom, can rotate to any spatial angle and direction, can further rotate the detection die body to a central shaft perpendicular to a beam, and can detect mechanical precision and image quality of equipment, and can guarantee that error results of the detected equipment can be detected clearly.
Furthermore, the mechanical detection die body is set to be of a structure that scale lines are carved on a base material, and the error value of translation or rotation of equipment is directly read from an image by using the principle of a vernier caliper, so that the error introduced when an image registration method is used for detection is avoided, and the reliability of the detection result is improved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:
fig. 1 schematically illustrates a structural view of a stent provided by an embodiment of the present disclosure.
Fig. 2 schematically illustrates a structural diagram of a mechanical precision detection mold body provided in an embodiment of the present disclosure.
Fig. 3 schematically shows a flow chart of a quality detection method provided by an embodiment of the present disclosure.
Fig. 4 schematically shows an effect diagram of overlapping the reference patch with the test patch after the reference patch is horizontally flipped, which is provided by the embodiment of the present disclosure.
Fig. 5 schematically shows an effect diagram provided by the embodiment of the disclosure, in which the reference patch is horizontally flipped and then coincides with the center of the test patch.
FIG. 6 is a schematic diagram illustrating the effect of the coincidence of the X-axis of the test strip with the reference strip provided by the embodiment of the disclosure.
FIG. 7 is a schematic diagram illustrating the effect of the embodiment of the present disclosure on coincidence of the Y-axis of the test patch and the reference patch.
FIG. 8 schematically illustrates a graph of distance relationships between a source to a phantom and an image provided by an embodiment of the disclosure.
Fig. 9 schematically shows a flow chart of a quality detection method provided by another embodiment of the present disclosure.
Detailed Description
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings. It is to be understood that the described embodiments are only a few, and not all, of the disclosed embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the description of the present disclosure, it is to be understood that the terms "longitudinal," "length," "circumferential," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present disclosure and for simplicity in description, and are not intended to indicate or imply that the referenced subsystems or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present disclosure.
Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure. And the shapes, sizes and position relations of all parts in the drawing do not reflect the real sizes, proportions and actual position relations. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Similarly, in the above description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. Reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
The disclosure provides a quality control module structure, which is suitable for quality control equipment of a non-coplanar DR image guidance system. The quality control die body structure comprises a support and a die body loaded on the support, and the die body is rotated to the central axis of a beam of quality control equipment of the non-coplanar DR image guidance system through the support so as to perform quality detection. The following detailed description is to be read in connection with specific embodiments.
A first embodiment of the present disclosure provides a quality control mold structure, which may include, for example:
the support comprises three rotating shafts, the three rotating shafts correspond to different rotational degrees of freedom respectively, and the support is used for realizing rotation of any angle and direction in a three-dimensional space.
And the mechanical precision detection die body is used for rotating to a central axis which is perpendicular to a beam of the quality control equipment of the non-coplanar digital radiological image guidance system under the driving action of the three rotating shafts so as to detect the mechanical precision of the quality control equipment of the non-coplanar digital radiological image guidance system based on the vernier caliper principle.
Fig. 1 schematically shows a structural diagram of a bracket provided in an embodiment of the present disclosure.
As shown in FIG. 1, the stand may include a base and three rotational axes corresponding to three rotational degrees of freedom, respectively
A high-precision electronic angle indicator may be mounted on each of the rotation axes for indicating the angle of the respective rotation axis.
In the embodiment of the present disclosure, the material of the support is a low atomic number material, and the low atomic number material needs to ensure very small beam attenuation under KV level X-ray fluoroscopy and has a sufficiently small deformation amount. For example, the low atomic number material comprises carbon fiber. Generally, in order to improve the contrast of the image, the equivalent atomic number of the low atomic number material is about 10, for example, the equivalent atomic number of carbon is 6, the equivalent atomic number of pmma is 6.5, and the equivalent atomic number of water is about 7.5.
Mechanical accuracy detects die body includes: the substrate material is marked with scale lines, and the scale lines are filled with high atomic number materials, wherein the atomic number of the high atomic number materials is larger than that of the substrate material. The higher the atomic number of the high atomic number material, the better, for example, lead is chosen with an atomic number of 82.
Fig. 2 schematically illustrates a structural diagram of a mechanical precision detection mold body provided in an embodiment of the present disclosure.
As shown in fig. 2, the mechanical precision inspection mold body is made of a low atomic number substrate material, and the scale marks are marked, and are filled with a high atomic number material. The cross section of the mechanical accuracy inspection phantom may be, for example, a square, and for example, a mechanical accuracy inspection phantom having a side length of 100mm and a thickness of 5mm is selected.
In the embodiment of the present disclosure, the scale lines include straight line scale lines and arc scale lines, and for example, the scale lines may include two intersecting straight line scale lines and an arc scale line with an intersection of two straight lines as a center of a circle.
Illustratively, according to the Cartesian coordinate system, the scale lines in the positive directions of the X axis and the Y axis are 25 lattices, each lattice is 2mm, the scale lines in the negative directions of the X axis and the Y axis are 26 lattices, and each lattice is 1.923mm. During detection, an image shot during acceptance testing is used as a reference image, the reference image is horizontally or vertically turned and is overlapped with an image during quality control, and the difference between the scale marks on the two sides is 0.077mm (2 mm-1.923 mm), namely the minimum detectable precision. The circle-arc lines are marked, the first quadrant and the third quadrant are 31 lattices, each lattice is 2.903 degrees, the second quadrant and the fourth quadrant are 30 lattices, each lattice is 3 degrees, and the minimum detection precision is 0.097 degrees (3 degrees to 2.903 degrees).
The second embodiment of the present disclosure further provides a quality control mold structure, which may include, for example:
the support comprises three rotating shafts, the three rotating shafts correspond to different rotational degrees of freedom respectively, and the support is used for realizing rotation of any angle and direction in a three-dimensional space.
And the image quality detection die body is used for rotating to a central axis which is vertical to a beam of the quality control equipment of the non-coplanar digital radiological image guiding system under the driving action of the three rotating shafts so as to detect the image quality of the quality control equipment of the non-coplanar digital radiological image guiding system.
The support is the same as the structure shown in fig. 1, and the description is omitted here. The image quality detection phantom can adopt the existing mature detection phantom, and the description is omitted here.
Based on the quality control die body structure, a third embodiment of the present disclosure provides a quality detection method.
Fig. 3 schematically shows a flow chart of a quality detection method provided by an embodiment of the present disclosure.
As shown in fig. 3, the quality detection method may include, for example, operations S301 to S303.
In operation S301, three rotation angles of the central axis of the beam with respect to the coordinate system of the treatment room are acquired after the quality control device of the non-coplanar digital radiographic image guidance system is installed and debugged.
In operation S302, the holder is mounted at a preset position, the holder is rotated according to three rotation angles, and the mechanical accuracy detection phantom is rotated to be perpendicular to the beam center axis.
In operation S303, mechanical precision detection is performed on the quality control device of the non-coplanar digital radiographic image guidance system based on the vernier caliper principle.
Specifically, operation S303 may include, for example: and under the condition that the mechanical precision detection die body rotates to be vertical to the central axis of the beam, shooting an image to obtain a test piece. And (3) coinciding the test piece with the center of a reference piece stored in advance, reading based on the scale marks on the test piece and the reference piece, and calculating the mechanical error of the quality control equipment of the non-coplanar digital radiographic image guidance system according to the read scale value.
Illustratively, when the apparatus is tested for acceptance with the mechanical precision sensing phantom rotated perpendicular to the beam center axis, the mechanical precision sensing phantom is loaded onto a holder, an image is taken, and saved as a reference sheet.
During quality control detection, the mold body is inserted into the support, and an image is shot to serve as a test piece.
Fig. 4 schematically shows an effect diagram of overlapping the reference patch with the test patch after the reference patch is horizontally flipped, which is provided by the embodiment of the present disclosure. Fig. 5 schematically shows an effect diagram provided by the embodiment of the disclosure, in which the reference patch is horizontally flipped and then coincides with the center of the test patch. FIG. 6 is a schematic diagram illustrating the effect of the coincidence of the X-axis of the test strip with the reference strip provided by the embodiment of the disclosure. FIG. 7 schematically shows an effect diagram of coincidence of the Y axis of the test patch and the reference patch provided by the embodiment of the disclosure.
First, the reference sheet was horizontally inverted and overlapped with the test sheet for analysis, as shown in FIG. 4.
Next, the center of the test piece is shifted to coincide with the center of the reference piece, as shown in FIG. 5.
Then, reading is started from the positive direction of the Y axis of the reference sheet until the inner circle scale and the outer circle scale are superposed, and the difference of each small grid of the inner and outer scales is as follows: 3 ° -2.903 ° =0.097 °, and the inner and outer scales coincide at the 21 st graduation mark in fig. 5, so the rotation angle is 0.097 × 21=2.037 °, and since the rotation angle of the test strip relative to the reference strip is counterclockwise, it can be detected that the rotation angle of the image plate rotates clockwise from the standard position, and the rotation angle is 2.037 °.
Next, the reference piece is reopened, flipped horizontally and aligned with the test piece, the test piece is rotated clockwise by 2.037 and translated so that the X-axis coincides with the reference piece, as shown in FIG. 6, at which time the X-axis scale is read and the 18 th and upper and lower scale lines in FIG. 6 coincide. Because the phase difference of each grid of the upper and lower scale lines is 2-1.923=0.077mm, the 18 th scale line in the figure is superposed, and the translation distance in the X-axis direction is obtained as follows: 0.077 × 18=1.38mm.
Then, the reference piece is opened again, vertically turned over, and overlapped and compared with the test piece, the test piece is rotated clockwise by 2.037 degrees, and the test piece is translated to make the Y axis coincide with the reference piece, as shown in FIG. 7, at this time, the Y axis scale is read, and the upper and lower two scale marks of the 8 th scale mark coincide. Since the phase difference between the upper and lower scale marks per grid is 2-1.923=0.077mm, and the 8 th scale mark in fig. 7 coincides, but since the abscissa of the test piece exceeds the scale of one small grid of the reference piece, the translation distance in the Y-axis direction is 2+0.077 × 8=2.615mm.
FIG. 8 schematically illustrates a graph of distance relationships between a source to a phantom and an image provided by an embodiment of the disclosure.
As shown in fig. 8, when the distance SAD from the source to the phantom and the distance from the source to the image plate are SID, the above translation distance is SID/SAD times the calculated value. The rotation error does not change with the change of the SID and SAD distances. The translation of the image plate has 3 directions, the rotation has 3 directions, the mechanical precision detection die body in the disclosure can only detect errors of two translations and one rotation direction, and the other translation is the distance change direction of the image plate and the source, the slight movement of the direction has very little influence on the result of IGRT, and the rotation of the other two directions has little influence on IGRT, so that the detection can not be carried out in the daily quality control.
Based on the quality control die body structure, a fourth embodiment of the present disclosure provides a quality detection method.
Fig. 9 schematically shows a flow chart of a quality detection method provided by another embodiment of the present disclosure.
As shown in fig. 9, the quality detection method may include operations S901 to S903, for example.
In operation S901, three rotation angles of the central axis of the beam with respect to the coordinate system of the treatment room are acquired after the quality control device of the non-coplanar digital radiographic image guidance system is installed and debugged.
In operation S902, the holder is mounted at a preset position, the holder is rotated according to three rotation angles, and the mechanical accuracy detection phantom is rotated to be perpendicular to the beam central axis.
In operation S903, image quality detection is performed on the quality control device of the non-coplanar digital radiographic image guidance system based on the image quality detection phantom.
According to the quality control die body structure and the quality detection method provided by the embodiment of the disclosure, on one hand, the bracket can rotate to any angle in space, so that the detection die body is perpendicular to the central axis of the beam, and the error result of the detected equipment can be clearly detected. On the other hand, the mechanical precision phantom uses the principle of a vernier caliper, and can directly read out the error value of translation or rotation from the image, and if the error value is greater than the detection threshold, the equipment needs to be calibrated. Although the method of image registration may be used to detect translational and rotational errors between the reference image and the detection image, errors in the image registration algorithm may be introduced. Since other errors need to be excluded in quality control, the method of scale marks used in the present disclosure can exclude errors introduced by image registration algorithms, making inspection results more reliable.
The above-mentioned embodiments, objects, technical solutions and advantages of the present disclosure are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present disclosure, and should not be construed as limiting the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A quality control phantom structure, wherein the quality control phantom structure is used for a quality control device of a non-coplanar digital radiographic image guidance system, the quality control phantom structure comprising:
the support comprises three rotating shafts, and the three rotating shafts correspond to different rotational degrees of freedom respectively and are used for realizing rotation in any angle and direction in a three-dimensional space;
and the mechanical precision detection die body is used for rotating to a central axis which is perpendicular to a beam of the quality control equipment of the non-coplanar digital radiological image guiding system under the driving action of the three rotating shafts so as to detect the mechanical precision of the quality control equipment of the non-coplanar digital radiological image guiding system based on a vernier caliper principle.
2. The quality control phantom structure according to claim 1, wherein said scaffold material is a low atomic number material.
3. The control phantom structure according to claim 2, wherein said low atomic number material comprises carbon fiber.
4. The quality control phantom structure according to claim 1, wherein said mechanical precision detection phantom comprises:
the substrate material is characterized in that scale marks are carved on the substrate material, and high atomic number materials are filled in the scale marks, wherein the atomic number of the high atomic number materials is larger than that of the substrate material.
5. The quality control phantom structure according to claim 4, wherein the graduation lines comprise two intersecting straight graduation lines and a circular arc graduation line centered on the intersection of the two straight graduation lines.
6. The quality control phantom structure according to claim 1, wherein said mechanical precision detection phantom has a square cross section.
7. A quality detection method based on the quality control phantom structure according to any one of claims 1 to 6, wherein the quality detection method is used for the quality control equipment of a non-coplanar digital radiographic image guidance system, and the quality detection method comprises the following steps:
after quality control equipment of the non-coplanar digital radiographic image guidance system is installed and debugged, acquiring three rotation angles of a beam central axis relative to a coordinate system of a treatment room;
installing a support at a preset position, rotating the support according to the three rotation angles, and rotating the mechanical precision detection die body to be vertical to the central axis of the beam;
and detecting the mechanical precision of the quality control equipment of the non-coplanar digital radiographic image guidance system based on the vernier caliper principle.
8. The quality inspection method according to claim 7, wherein the mechanical precision inspection of the quality control device of the non-coplanar digital radiographic image guidance system based on the vernier caliper principle specifically comprises:
under the condition that the mechanical precision detection die body rotates to be vertical to the central axis of the beam, shooting an image to obtain a test piece;
and superposing the center of the test piece with the center of a pre-stored reference piece, reading based on the scale marks on the test piece and the reference piece, and calculating the mechanical error of the quality control equipment of the non-coplanar digital radiographic image guidance system according to the read scale value.
9. A quality control phantom structure, which is used for a quality control device of a non-coplanar digital radiographic image guidance system, the quality control phantom structure comprising:
the support comprises three rotating shafts, and the three rotating shafts correspond to different rotational degrees of freedom respectively and are used for realizing rotation in any angle and direction in a three-dimensional space;
and the image quality detection die body is used for rotating to a central axis which is vertical to a beam of quality control equipment of the non-coplanar digital radiological image guiding system under the driving action of the three rotating shafts so as to detect the image quality of the quality control equipment of the non-coplanar digital radiological image guiding system.
10. A quality detection method based on the quality control phantom structure according to claim 9, wherein the quality detection method is used for a quality control device of a non-coplanar digital radiographic image guidance system, and the quality detection method comprises:
after quality control equipment of the non-coplanar digital radiographic image guidance system is installed and debugged, acquiring three rotation angles of a beam central axis relative to a coordinate system of a treatment room;
installing a support at a preset position, rotating the support according to the three rotation angles, and rotating the image quality detection mold body to be vertical to the central axis of the beam;
and performing image quality detection on the quality control equipment of the non-coplanar digital radiological image guidance system based on the image quality detection die body.
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