CN111388880B - Arc radiotherapy calibration method, device, equipment and storage medium - Google Patents
Arc radiotherapy calibration method, device, equipment and storage medium Download PDFInfo
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- CN111388880B CN111388880B CN202010200878.5A CN202010200878A CN111388880B CN 111388880 B CN111388880 B CN 111388880B CN 202010200878 A CN202010200878 A CN 202010200878A CN 111388880 B CN111388880 B CN 111388880B
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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
- A61N5/1071—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan
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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
- A61N5/1071—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan
- A61N2005/1072—Monitoring, verifying, controlling systems and methods for verifying the dose delivered by the treatment plan taking into account movement of the target
Abstract
The embodiment of the application discloses a method, a device, equipment and a storage medium for checking arc radiotherapy. The method comprises the following steps: acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in an arc treatment process; reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; image displacement of the three-dimensional patient actual image and the three-dimensional patient planning image is determined as a first error. According to the embodiment of the application, two-dimensional treatment image data which are acquired when a radiotherapy plan is executed and comprise beam information and user information are acquired, the two-dimensional plan beam image data corresponding to the radiotherapy plan are used as the beam information, the actual image of a three-dimensional patient carrying the user information is calculated reversely, the change condition of the user information when the radiotherapy plan is executed and the radiotherapy plan is made is determined, and the change condition is used for indicating medical staff to adjust the radiotherapy plan or optimize the radiotherapy process, so that more accurate treatment is guided.
Description
Technical Field
The embodiment of the application relates to the field of medical treatment, in particular to an arc radiotherapy calibration method, an arc radiotherapy calibration device, an arc radiotherapy calibration equipment and a storage medium.
Background
During radiation therapy, the precision requirements for treatment location, dose delivery, and patient throughput are very high. During the treatment process of a tumor patient, the distribution of radiotherapy dose and the image of a treatment plan are finally influenced by the influence of machine precision, daily positioning errors, physiological changes of the tumor and normal organs, other random factors and the like.
In the prior art, before a tumor patient is treated, two-dimensional and three-dimensional image data are generally acquired, and then are registered with image data acquired during planning, and the positioning condition of the patient during treatment is corrected through deviation generated by registration so as to achieve the purpose of accurate and repeated positioning during planning and actual treatment of the patient.
However, during the treatment of the tumor patient, due to the physiological motion of respiration, etc., the positioning error, the tumor variation and other random factors, there may be a certain deviation between the actual implementation situation and the theoretical situation of the radiotherapy plan.
In view of the above, how to effectively verify the execution situation of the radiotherapy plan becomes an urgent problem to be solved.
Disclosure of Invention
The application provides an arc radiotherapy monitoring method, an arc radiotherapy monitoring device, an arc radiotherapy monitoring equipment and a storage medium, so that the difference between the execution condition and the theoretical condition of a radiotherapy plan in the radiotherapy process can be effectively verified, and more accurate treatment can be guided.
In a first aspect, an embodiment of the present application provides an arc radiotherapy verification method, including:
acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in an arc treatment process;
reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose;
and determining the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image, and taking the image displacement as a first error.
In a second aspect, an embodiment of the present application provides an arc radiotherapy calibration apparatus, including:
the two-dimensional treatment image data acquisition module is used for acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process;
the three-dimensional patient actual image reconstruction module is used for reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose;
and the first error determination module is used for determining the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image and taking the image displacement as a first error.
In a third aspect, an embodiment of the present application further provides a medical imaging apparatus, including:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method of arc radiation treatment verification as provided in an embodiment of the first aspect.
In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements an arc radiation therapy verification method as provided in an embodiment of the first aspect.
According to the embodiment of the application, two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process are acquired; reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-position plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to the planning radiation dose; and determining the influence displacement of the two-dimensional patient actual image and the three-dimensional patient plan image, and taking the influence displacement as a first error. According to the technical scheme, the two-dimensional treatment image data which are acquired when the radiotherapy plan is executed on the patient and comprise the beam information and the user information are acquired, the two-dimensional plan beam image data corresponding to the radiotherapy plan are used as the beam information, the three-dimensional patient actual image carrying the user information is calculated reversely, the change condition of the user information when the radiotherapy plan is executed and the radiotherapy plan is made is determined, and the medical staff is instructed to adjust the radiotherapy plan or optimize the radiotherapy process according to the change condition, so that more accurate treatment can be guided.
Drawings
FIG. 1 is a flow chart of an arc radiation therapy verification method in accordance with one embodiment of the present application;
FIG. 2 is a flowchart of an arc radiation therapy verification method according to a second embodiment of the present application;
FIG. 3 is a flow chart of an arc radiation therapy calibration method according to a third embodiment of the present application;
FIG. 4 is a block diagram of an arc radiation therapy calibration apparatus according to a fourth embodiment of the present application;
fig. 5 is a structural diagram of a medical imaging apparatus according to a fifth embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of an arc radiotherapy verification method in an embodiment of the present application, which is suitable for verifying an arc radiotherapy process after a radiotherapy plan is executed on a patient by using a radiotherapy device. The method is performed by an arc radiotherapy verification device, which is implemented by software and/or hardware and is specifically configured in a medical imaging apparatus, which may be a radiotherapy apparatus including a CBCT (Cone beam computed tomography).
A method of arc radiation therapy verification, as illustrated in figure 1, comprising:
s110, acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process.
The two-dimensional treatment image data is the original data acquired by CBCT when the radiotherapy plan is executed to the patient.
For example, the two-dimensional treatment image data may be stored in a local storage device of the medical imaging device, another storage device associated with the medical imaging device, or a cloud end in advance, and accordingly, when the two-dimensional treatment image data needs to be acquired, the two-dimensional treatment image data is acquired from the local storage device of the medical imaging device or the other storage device associated with the medical imaging device, or the cloud end.
Or alternatively, the CBCT may scan the patient in real time when the radiotherapy plan is performed, to obtain scan data, and the obtained scan data is used as two-dimensional treatment image data.
It can be understood that the two-dimensional treatment image data carries beam current information and user information, which are used for representing beam current conditions and user states in the radiation treatment process.
S120, reconstructing according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan to obtain a three-dimensional patient actual image; the two-dimensional planning beam image data is beam intensity corresponding to the planning radiation dose.
The two-dimensional plan beam image data corresponding to the radiotherapy plan can be understood as beam current which is determined by the radiotherapy plan and irradiates different positions of the target area, the beam current acts on corresponding positions of the mold body respectively, and beam current intensity data obtained by CBCT scanning is simulated.
In an optional implementation manner of the embodiment of the present application, the reconstructing to obtain the three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional planning beam image data corresponding to the radiotherapy plan may be: subtracting the two-dimensional treatment image data from the two-dimensional plan beam image data corresponding to the radiotherapy plan to obtain two-dimensional patient actual image data; and reconstructing the actual image data of each two-dimensional patient corresponding to different arc angles to obtain the actual image of the three-dimensional patient.
It can be understood that the two-dimensional planning beam image data corresponding to the radiotherapy plan only carries beam information and does not contain any user information, and therefore, the beam information in the two-dimensional treatment image data is deducted by making a difference between the two-dimensional treatment image data and the two-dimensional planning beam image data, and the user information capable of representing the current state of the user can be obtained.
Since the cone beam is used for the rotational scanning, after the difference is made between the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan, only the two-dimensional data of the patient volume data, that is, the two-dimensional patient actual image data, can not reflect the state of the patient as a whole when the scanning plan is executed, and therefore, the actual image data of each two-dimensional patient corresponding to different arc angles need to be reconstructed, and the three-dimensional image data of the patient obtained by reconstruction is used as the three-dimensional patient actual image.
S130, determining image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image, and taking the image displacement as a first error.
A three-dimensional patient planning image is understood to be a CT image of the patient prior to the radiation treatment or during the planning of the treatment.
And comparing the actual image of the three-dimensional patient with the planned image of the three-dimensional patient by means of difference making or quotient making and the like to obtain image displacement, and taking the image displacement as a first error for representing the user difference between the execution condition and the theoretical condition of the radiotherapy plan.
It can be understood that the value of the first error is affected by physiological changes, tumor changes, daily positioning errors, accelerator stability and other factors during radiotherapy of a patient. The medical personnel can adjust the radiotherapy plan or optimize the radiotherapy process according to the size and the actual condition of the first error.
According to the embodiment of the application, two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process are acquired; reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-position plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to the planning radiation dose; and determining influence displacement of the two-dimensional patient actual image and the three-dimensional patient planning image, and taking the influence displacement as a first error. According to the technical scheme, the two-dimensional treatment image data which are acquired when the radiotherapy plan is executed on the patient and comprise the beam information and the user information are acquired, the two-dimensional plan beam image data corresponding to the radiotherapy plan are used as the beam information, the three-dimensional patient actual image carrying the user information is calculated reversely, the change condition of the user information when the radiotherapy plan is executed and the radiotherapy plan is made is determined, and the medical staff is instructed to adjust the radiotherapy plan or optimize the radiotherapy process according to the change condition, so that more accurate treatment can be guided.
Example two
Fig. 2 is a flowchart of an arc radiotherapy verification method in the second embodiment of the present application, and the second embodiment of the present application is optimized and improved based on the technical solutions of the above embodiments.
Further, after the operation of reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan, additionally determining a three-dimensional actual dose distribution according to the two-dimensional treatment image data and the two-dimensional patient actual image data; and determining the dose error of the three-dimensional actual dose distribution and the three-dimensional planned dose distribution corresponding to the radiotherapy plan, and taking the determined dose error as a second error so as to perfect a radiotherapy inspection mechanism.
A method of arc radiation therapy verification, as illustrated in figure 2, comprising:
s210, acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process.
S220, reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to the planning radiation dose.
And S230, determining the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image, and taking the image displacement as a first error.
S240, determining three-dimensional actual dose distribution according to the two-dimensional treatment image data and the two-dimensional patient actual image data.
In an optional implementation manner of the embodiment of the present application, the determining a three-dimensional actual dose distribution according to the two-dimensional treatment image data and the two-dimensional patient actual image data may be: subtracting the two-dimensional treatment image data from the two-dimensional patient actual image data to obtain two-dimensional actual dose distribution; and determining three-dimensional actual dose distribution according to the corresponding two-dimensional actual dose distribution under different arc angles.
It can be understood that, during the execution of the radiotherapy plan, there may be some deviation between the radiation dose of the partial position in the target region and the radiation dose corresponding to the radiotherapy plan due to the problems of patient positioning and the like. Therefore, by removing the user information representing the radiotherapy plan execution process, namely the actual image data of the two-dimensional patient, from the two-dimensional treatment image data carrying the beam information and the user information, the two-dimensional data of the radiation dose without an arc angle in the radiotherapy plan execution process, namely the two-dimensional actual dose distribution can be back-calculated; accumulating the two-dimensional actual dose distribution of different positions in the target area under different arc angles, and determining the three-dimensional actual dose distribution corresponding to different positions of the target area when the radiotherapy plan is executed. At the moment, the determined three-dimensional actual dose distribution only carries beam information, so that medical personnel can effectively control the actually received radiation dose of a patient in the treatment process.
And S250, determining the dose error of the three-dimensional actual dose distribution and the three-dimensional planned dose distribution corresponding to the radiotherapy plan, and taking the determined dose error as a second error.
Comparing the three-dimensional actual dose distribution with the three-dimensional plan dose distribution corresponding to the radiotherapy plan by means of difference making or quotient making and the like to obtain a dose error between an actual condition and a theoretical condition of execution of the radiotherapy plan, and using the dose error as a second error for representing the dose difference between the execution condition and the theoretical condition of the radiotherapy plan so that medical personnel can adjust the radiotherapy plan or optimize the radiotherapy process according to the size and the actual condition of the second error.
According to the embodiment of the application, after the three-dimensional patient actual image is obtained through reconstruction according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan, the three-dimensional actual dose distribution is determined according to the two-dimensional treatment image data and the two-dimensional patient actual image data; and determining the dose error of the three-dimensional actual dose distribution and the three-dimensional planned dose distribution corresponding to the radiotherapy plan, and taking the determined dose error as a second error, so that the difference between the execution condition of the radiotherapy plan and the theoretical condition is verified in the irradiated dose dimension, and more accurate treatment is guided.
EXAMPLE III
Fig. 3 is a flowchart of an arc radiotherapy verification method in the third embodiment of the present application, and the embodiment of the present application performs optimization and improvement on the technical solutions of the above embodiments.
A method of arc radiotherapy examination as shown in figure 3, comprising:
s310, acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process.
S320, reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to the planning radiation dose.
S330, determining the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image, and taking the image displacement as a first error.
S340, determining the dose error of the two-dimensional treatment image data and the two-dimensional planning beam image data under the same arc angle, and taking the determined dose error as a third error.
It can be understood that, since the two-dimensional planning beam image data is the beam which irradiates different positions of the target area determined by the radiotherapy plan, the beam intensity data obtained by simulating the CBCT scanning are respectively acted on the corresponding positions of the phantom. Therefore, when one simulation scan is performed, two-dimensional planned beam image data at a specific arc angle can be obtained.
And comparing the two-dimensional treatment image data under the same arc angle with the two-dimensional plan beam image number by means of difference making or quotient making and the like to obtain the dose error under the same arc angle, and taking the determined dose error as a third error.
It will be appreciated that by determining the dose error for the same arc angle, the analysis of the cause of the error can be performed on a finer granularity for the healthcare worker, thereby providing detailed data reference for the healthcare worker to adjust the radiotherapy plan or to optimize the radiotherapy process.
According to the embodiment of the application, after the two-dimensional treatment image data acquired when the radiotherapy plan is executed on a patient in the arc treatment process is acquired, the dose error between the two-dimensional treatment image data and the two-dimensional plan beam image data under the same arc angle is additionally determined, the determined dose error is used as a third error, so that the difference between the execution condition and the theoretical condition of the radiotherapy plan in the irradiated dose dimension is verified, the verification condition is refined to the two-dimensional data corresponding to the same arc angle, the verification with finer granularity is realized, and more accurate treatment is guided.
Example four
Fig. 4 is a structural diagram of an arc radiotherapy verification apparatus in a fourth embodiment of the present application, which is suitable for a case where a radiotherapy process is verified after a radiotherapy plan is executed on a patient by using a radiotherapy device. The apparatus is implemented by software and/or hardware, and is specifically configured in a medical imaging device, which may be a radiotherapy device including CBCT.
An arc radiotherapy calibration apparatus as shown in fig. 4, comprising: a two-dimensional treatment image data acquisition module 410, a three-dimensional patient actual image reconstruction module 420, and a first error determination module 430. Wherein the content of the first and second substances,
a two-dimensional treatment image data acquisition module 410 for acquiring two-dimensional treatment image data acquired when a radiotherapy plan is performed on a patient during an arc treatment process;
a three-dimensional patient actual image reconstruction module 420, configured to reconstruct a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose;
the first error determination module 430 is configured to determine an image displacement between the three-dimensional patient actual image and the three-dimensional patient planning image, and use the image displacement as a first error.
According to the embodiment of the application, the two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process is acquired through the two-dimensional treatment image data acquisition module; reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-position plan beam image data corresponding to the radiotherapy plan by using a three-dimensional patient actual image reconstruction module; the two-dimensional planning beam image data is beam intensity corresponding to the planning radiation dose; and determining the influence displacement of the two-dimensional patient actual image and the three-dimensional patient plan image through a first error determination module, and taking the influence displacement as a first error. According to the technical scheme, the two-dimensional treatment image data which are acquired when the radiotherapy plan is executed on the patient and comprise the beam information and the user information are acquired, the two-dimensional plan beam image data corresponding to the radiotherapy plan are used as the beam information, the three-dimensional patient actual image carrying the user information is calculated reversely, the change condition of the user information when the radiotherapy plan is executed and the radiotherapy plan is made is determined, and the medical staff is instructed to adjust the radiotherapy plan or optimize the radiotherapy process according to the change condition, so that more accurate treatment can be guided.
Further, the three-dimensional patient actual image reconstruction module 420 is specifically configured to:
subtracting the two-dimensional treatment image data from the two-dimensional plan beam image data corresponding to the radiotherapy plan to obtain two-dimensional patient actual image data;
and reconstructing the actual image data of each two-dimensional patient corresponding to different arc angles to obtain the actual image of the three-dimensional patient.
Further, the apparatus further comprises:
the three-dimensional actual dose distribution determining module is used for determining three-dimensional actual dose distribution according to the two-dimensional treatment image data and the two-dimensional patient actual image data;
and the second error determination module is used for determining the dose error of the three-dimensional actual dose distribution and the three-dimensional planned dose distribution corresponding to the radiotherapy plan and taking the determined dose error as a second error.
Further, the three-dimensional actual dose distribution determining module is specifically configured to:
subtracting the two-dimensional treatment image data from the two-dimensional patient actual image data to obtain two-dimensional actual dose distribution;
and determining three-dimensional actual dose distribution according to the corresponding two-dimensional actual dose distribution under different arc angles.
Further, the apparatus further comprises:
and the third error determination module is used for determining the dose error of the two-dimensional treatment image data and the two-dimensional planning beam image data under the same arc angle after acquiring the two-dimensional treatment image data acquired when the radiotherapy plan is executed on the patient in the arc treatment process, and taking the determined dose error as a third error.
The arc radiotherapy calibration device can execute the arc radiotherapy calibration method provided by any embodiment of the application, and has corresponding functional modules and beneficial effects for executing the arc radiotherapy calibration method.
EXAMPLE five
Fig. 5 is a block diagram of a medical imaging apparatus according to a fifth embodiment of the present application, where the apparatus includes: input device 510, output device 520, processor 530, and storage device 540.
Wherein, the input device 510 is used for acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in an arc treatment process;
an output device 520 for displaying the reconstructed three-dimensional patient actual image and/or the first error;
one or more processors 530;
In fig. 5, a processor 530 is taken as an example, the input device 510 of the medical imaging apparatus may be connected to the output device 520, the processor 530 and the storage device 540 through a bus or other means, and the processor 530 and the storage device 540 are also connected through a bus or other means, which is taken as an example in fig. 5.
In this embodiment, the processor 530 in the medical imaging apparatus may control the input device 510 to acquire two-dimensional treatment image data acquired when a radiotherapy plan is performed on a patient during an arc treatment; the three-dimensional patient actual image can be obtained through reconstruction according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose; the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image can be determined, and the image displacement is used as a first error; the output device can also be controlled to display the reconstructed three-dimensional patient actual image and/or the first error.
The storage device 540 of the medical imaging apparatus may be used as a computer-readable storage medium for storing one or more programs, such as software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the arc radiotherapy verification method in the embodiment of the present application (for example, the two-dimensional treatment image data acquisition module 410, the three-dimensional patient actual image reconstruction module 420, and the first error determination module 430 shown in fig. 4). The processor 530 executes software programs, instructions and modules stored in the storage device 540 to perform various functional applications and data processing of the medical imaging apparatus, i.e., to implement the arc radiotherapy verification method in the above-described method embodiment.
The storage device 540 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data and the like (such as the two-dimensional treatment image data, the two-dimensional planning beam image data, the three-dimensional patient actual image, the first error and the like in the above-described embodiments). In addition, the storage 540 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage 540 may further include memory located remotely from processor 530, which may be connected to a server over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
EXAMPLE six
A sixth embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by an arc radiation therapy verification apparatus, implements an arc radiation therapy verification method provided in the present application, and the method includes: acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in an arc treatment process; reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose; and determining the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image, and taking the image displacement as a first error.
From the above description of the embodiments, it is obvious for those skilled in the art that the present application can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (8)
1. An arc radiation therapy verification method, comprising:
acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in an arc treatment process; the two-dimensional treatment image data carries beam information and user information;
reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose;
determining image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image, and taking the image displacement as a first error;
wherein, according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan, reconstructing to obtain a three-dimensional patient actual image comprises:
subtracting the two-dimensional treatment image data from the two-dimensional plan beam image data corresponding to the radiotherapy plan to obtain two-dimensional patient actual image data;
and reconstructing the actual image data of each two-dimensional patient corresponding to different arc angles to obtain the actual image of the three-dimensional patient.
2. The method of claim 1, wherein after reconstructing a three-dimensional patient real image from the two-dimensional treatment image data and two-dimensional planning beam image data corresponding to the radiotherapy plan, the method further comprises:
determining three-dimensional actual dose distribution according to the two-dimensional treatment image data and the two-dimensional patient actual image data;
and determining the dose error of the three-dimensional actual dose distribution and the three-dimensional planned dose distribution corresponding to the radiotherapy plan, and taking the determined dose error as a second error.
3. The method of claim 2, wherein determining a three-dimensional actual dose distribution from the two-dimensional treatment image data and two-dimensional patient actual image data comprises:
subtracting the two-dimensional treatment image data from the two-dimensional patient actual image data to obtain two-dimensional actual dose distribution;
and determining three-dimensional actual dose distribution according to the corresponding two-dimensional actual dose distribution under different arc angles.
4. The method of any of claims 1-3, wherein after acquiring two-dimensional treatment image data acquired while performing a radiotherapy plan on a patient during an arc treatment, the method further comprises:
determining a dose error of the two-dimensional treatment image data and the two-dimensional planning beam image data at the same arc angle, and taking the determined dose error as a third error.
5. An arc radiation therapy calibration device, comprising:
the two-dimensional treatment image data acquisition module is used for acquiring two-dimensional treatment image data acquired when a radiotherapy plan is executed on a patient in the arc treatment process; the two-dimensional treatment image data carries beam information and user information;
the three-dimensional patient actual image reconstruction module is used for reconstructing to obtain a three-dimensional patient actual image according to the two-dimensional treatment image data and the two-dimensional plan beam image data corresponding to the radiotherapy plan; the two-dimensional planning beam image data is beam intensity corresponding to planning radiation dose;
the first error determination module is used for determining the image displacement of the three-dimensional patient actual image and the three-dimensional patient plan image and taking the image displacement as a first error;
wherein, the three-dimensional patient actual image reconstruction module is specifically configured to:
subtracting the two-dimensional treatment image data from the two-dimensional plan beam image data corresponding to the radiotherapy plan to obtain two-dimensional patient actual image data;
and reconstructing the actual image data of each two-dimensional patient corresponding to different arc angles to obtain the actual image of the three-dimensional patient.
6. The apparatus of claim 5, further comprising:
the three-dimensional actual dose distribution determining module is used for determining three-dimensional actual dose distribution according to the two-dimensional treatment image data and the two-dimensional patient actual image data;
and the second error determination module is used for determining the dose error of the three-dimensional actual dose distribution and the three-dimensional planned dose distribution corresponding to the radiotherapy plan and taking the determined dose error as a second error.
7. A medical imaging apparatus, comprising:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement an arc radiation therapy verification method as claimed in any one of claims 1-4.
8. A computer-readable storage medium, having stored thereon a computer program, which, when executed by a processor, implements an arc radiation therapy verification method as claimed in any one of claims 1-4.
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| CN202010200878.5A CN111388880B (en) | 2020-03-20 | 2020-03-20 | Arc radiotherapy calibration method, device, equipment and storage medium |
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| CN111388880A CN111388880A (en) | 2020-07-10 |
| CN111388880B true CN111388880B (en) | 2022-06-14 |
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