A method, system and device for transmitting the status of a subfield support device in radiotherapy

Abstract

This invention discloses a method, system, and device for transferring the status of a support device at different locations during radiotherapy, relating to the field of medical radiotherapy technology. The method includes: generating a baseline status dataset; verifying whether the support status during CT positioning matches the baseline status dataset; quantifying the overall deviation of the current support status from the baseline status dataset; and using whether the deviation meets the standard as a criterion for allowing beam delivery. This invention solves the problem of inconsistent support status transfer in existing processes by digitizing the mechanical status of the support device and performing mandatory verification at each key stage.

Description

Technical Field

[0001] This invention relates to the field of medical radiotherapy technology, and more specifically to a method, system, and device for transmitting the status of a segmented support device during radiotherapy. Background Technology

[0002] In radiotherapy, proper positioning is crucial for ensuring treatment accuracy. For large patients (such as obese or broad-shouldered patients), standard monolithic fixation devices (such as one-piece body membranes) are often insufficient to cover or completely enclose them. Therefore, in clinical practice, modular fixation devices (such as head, neck, and shoulder membranes combined with abdominal and pelvic vacuum pads or leg support modules) are commonly used for combined fixation.

[0003] However, in existing radiotherapy procedures, simulation positioning, CT scanning, treatment planning, and treatment execution are all independent processes. The relative position, shape, and support strength of the site-specific support devices are easily altered after each assembly and disassembly. Due to the lack of technical means to accurately and consistently transmit the support status to the planning and imaging verification stages, problems often arise where the planning geometry is based on one support status, the imaging verification on another, and the support status drifts again during actual treatment, leading to risks such as target area deviation and mis-irradiation of normal organs.

[0004] Therefore, how to provide a method, system, and device for transmitting the status of a segmented support device during radiotherapy is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a method, system and device for transmitting the status of a segmented support device during radiotherapy, which solves the problem in the prior art that the status of the segmented support device cannot be transmitted consistently throughout the entire process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A method for transmitting the status of a site-specific support device during radiotherapy, comprising: During the simulation positioning phase, the initial spatial coordinate set of multimodal reference points fixed on the sub-part support device is obtained, and the initial morphological parameter vector of each support component is obtained through sensors and bound and stored as a reference state dataset. During CT simulation positioning, the current spatial coordinate set of the multimodal reference points is obtained, the rigid registration error is calculated, and it is determined whether to execute the planned design. Before treatment, the current spatial coordinate set and current morphological parameter vector of the multimodal reference point are obtained in real time, and the support state deviation index is calculated. The support status deviation index is judged, and based on the judgment result, the treatment device is unlocked to allow the beam to exit, or it is kept locked.

[0007] Preferably, each of the multimodal reference points is uniquely identified in CT images, MRI images, and optical surface scan images.

[0008] Preferably, the initial morphological parameter vector of the support components includes: the support height, tilt angle, and vacuum pad negative pressure value of the head, neck and shoulder support, chest and abdomen support, and lower limb support.

[0009] Preferably, the expression for rigid registration error is:

[0010] in For the first The spatial coordinates of a multimodal reference point in a CT image. For the first The initial spatial coordinates of the multimodal reference points during the simulation positioning phase. It is a three-dimensional Euclidean distance.

[0011] Preferably, the expression for the support state deviation index is:

[0012] in For the first Spatial coordinates of a multimodal reference point during real-time tracking and The weighting coefficients are preset and satisfy α+β=1. Let be the Euclidean norm of the difference between the morphological parameter vectors, and and Before calculation, it is normalized to a dimensionless vector.

[0013] Preferably, the method involves judging the support state deviation index and, based on the judgment result, unlocking the treatment device to allow beam delivery or maintaining the lockout, including: The support state deviation index is compared with the second preset threshold. If the support state deviation index is less than or equal to the second preset threshold, it is determined that the deviation between the current support state and the baseline state dataset is within the allowable range, and the treatment device is unlocked to allow beam output. Otherwise, the lock remains engaged, and the system prompts the user to adjust the support device to match the baseline state dataset.

[0014] A status transmission system for a segmented support device during radiotherapy includes: Baseline State Establishment Module: During the simulation positioning phase, the initial spatial coordinate set of multimodal reference points fixed on the sub-part support device is obtained, and the initial morphological parameter vectors of each support component are obtained through sensors and bound and stored as a baseline state dataset. Initial forced verification module: During CT simulation positioning, it acquires the current spatial coordinate set of the multimodal reference points, calculates the rigid registration error, and determines whether to execute the plan design; Real-time comparison module: Before treatment, it acquires the current spatial coordinate set and current morphological parameter vector of the multimodal reference point in real time and calculates the support state deviation index. Beam output control module: It judges the support status deviation index and, based on the judgment result, unlocks the treatment device to allow beam output or keeps it locked.

[0015] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement a method for transmitting the state of a segmented support device during radiotherapy.

[0016] As can be seen from the above technical solution, compared with the prior art, the present invention provides a method, system and equipment for transmitting the state of a segmented support device during radiotherapy, which solves the problem of the difficulty in unifying the coordinates of the segmented support device under different imaging modalities, establishes a physical spatial reference throughout the entire process, and transforms the support device adjustment process that originally relied on manual experience into digital closed-loop control through support state coding and automatic verification mechanism, fundamentally avoiding geometric deviations caused by inconsistent support states. It is suitable for large-sized patients and significantly improves the accuracy and repeatability of segmented combined positioning without sacrificing fixation comfort. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the method flow provided by the present invention; Figure 2 This is a schematic diagram of the system structure provided by the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] See Figure 1 This invention discloses a method for transmitting the state of a segmented support device during radiotherapy, comprising: During the simulation positioning phase, the initial spatial coordinate set of multimodal reference points fixed on the sub-part support device is obtained, and the initial morphological parameter vector of each support component is obtained through sensors and bound and stored as a reference state dataset. During CT simulation positioning, the current spatial coordinate set of the multimodal reference points is obtained, the rigid registration error is calculated, and it is determined whether to execute the planned design. Before treatment, the current spatial coordinate set and current morphological parameter vector of the multimodal reference point are obtained in real time, and the support state deviation index is calculated. The support status deviation index is judged, and based on the judgment result, the treatment device is unlocked to allow the beam to exit, or it is kept locked.

[0021] Specifically, the steps for establishing the baseline fingerprint are as follows: In the simulation positioning stage, the initial spatial coordinate set of at least three multimodal reference points fixed on the substrate of the sub-part support device is obtained by using an optical body surface scanning device. And obtain the support morphological parameter vector through sensors installed on each support component. ,Will and Binding storage as baseline state dataset ; Specifically, the verification steps during the planning phase are as follows: During CT simulation and localization, the current spatial coordinate set of the multimodal reference points is automatically identified from the CT images. ,calculate Compared to rigid registration error rigid registration error With the first preset threshold In comparison, if If the current support status is consistent with the baseline status dataset, the planned design can be executed; otherwise, the planned design is prohibited, and the support device must be readjusted until the conditions are met. Specifically, the real-time registration step before treatment involves acquiring the real-time spatial coordinate set of the multimodal reference points using an optical body surface tracking system before each treatment. And read the current shape parameter vector of each supporting component. Calculate the support state deviation index Δ, which is used to quantify the overall deviation between the current support state and the baseline state dataset. Specifically, the beam output control steps are as follows: the support state deviation index Δ is compared with the second preset threshold. If Δ is less than or equal to the second preset threshold, then... If the deviation between the current support state and the baseline state dataset is within the allowable range, the treatment device is unlocked to allow the beam to be released; otherwise, it remains locked, and a prompt is given to adjust the support device to match the baseline state dataset.

[0022] More specifically, the first preset threshold is 2mm, and the second preset threshold is 3mm or a corresponding dimensionless value.

[0023] More specifically, the number of multimodal reference points is at least three, and each reference point can be uniquely identified in CT images, MRI images, and optical surface scan images.

[0024] More specifically, the initial morphological parameter vector of the support components includes: the support height, tilt angle, and vacuum pad negative pressure value of the head, neck and shoulder support, chest and abdomen support, and lower limb support.

[0025] More specifically, the expression for rigid registration error is:

[0026] in For the first The spatial coordinates of a multimodal reference point in a CT image. For the first The initial spatial coordinates of the multimodal reference points during the simulation positioning phase. It is a three-dimensional Euclidean distance.

[0027] More specifically, the expression for the supporting state deviation index is:

[0028] in For the first Spatial coordinates of a multimodal reference point during real-time tracking and The weighting coefficients are preset and satisfy α+β=1. Let be the Euclidean norm of the difference between the morphological parameter vectors, and and Before calculation, it is normalized to a dimensionless vector.

[0029] More specifically, weighting coefficients and Based on the pre-set rigidity of the support devices in different parts, for rigid support devices Value greater than For flexible support devices Value greater than .

[0030] More specifically, the deviation index of the support state is judged, and based on the judgment result, the treatment device is unlocked to allow beam delivery, or locked in place, including: The support state deviation index is compared with the second preset threshold. If the support state deviation index is less than or equal to the second preset threshold, it is determined that the deviation between the current support state and the baseline state dataset is within the allowable range, and the treatment device is unlocked to allow beam output. Otherwise, the lock remains engaged, and the system prompts the user to adjust the support device to match the baseline state dataset.

[0031] This invention generates a unique baseline state dataset as a reference standard for the entire process. Using the baseline state dataset as a reference, it verifies whether the support state during CT positioning matches the dataset. Matching is a necessary condition for entering the planning and design phase. Using the baseline state dataset as a reference, it quantifies the overall deviation of the current support state from the dataset. Whether the deviation meets the standard is used as the sole criterion for allowing beam exit. This achieves closed-loop control that can be established once and reused throughout the entire process. By digitizing the mechanical state of the support device and performing mandatory verification at each key stage, it solves the problem of inconsistent transmission of support state in existing processes.

[0032] On the other hand, see Figure 2 The present invention also discloses a status transmission system for a segmented support device during radiotherapy, comprising: Baseline State Establishment Module: During the simulation positioning phase, the initial spatial coordinate set of multimodal reference points fixed on the sub-part support device is obtained, and the initial morphological parameter vectors of each support component are obtained through sensors and bound and stored as a baseline state dataset. Initial forced verification module: During CT simulation positioning, it acquires the current spatial coordinate set of the multimodal reference points, calculates the rigid registration error, and determines whether to execute the plan design; Real-time comparison module: Before treatment, it acquires the current spatial coordinate set and current morphological parameter vector of the multimodal reference point in real time and calculates the support state deviation index. Beam output control module: It judges the support status deviation index and, based on the judgment result, unlocks the treatment device to allow beam output or keeps it locked.

[0033] In another aspect, embodiments of the present invention also disclose an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement a state transmission method for a segmented support device during radiotherapy.

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for transmitting the state of a segmented support device during radiotherapy, characterized in that, include: During the simulation positioning phase, the initial spatial coordinate set of multimodal reference points fixed on the sub-part support device is obtained, and the initial morphological parameter vector of each support component is obtained through sensors and bound and stored as a reference state dataset. During CT simulation positioning, the current spatial coordinate set of the multimodal reference points is obtained, the rigid registration error is calculated, and it is determined whether to execute the planned design. Before treatment, the current spatial coordinate set and current morphological parameter vector of the multimodal reference point are obtained in real time, and the support state deviation index is calculated. The support status deviation index is judged, and based on the judgment result, the treatment device is unlocked to allow the beam to exit, or it is kept locked.

2. The method for transmitting the state of a segmented support device during radiotherapy according to claim 1, characterized in that, Each of the multimodal reference points is uniquely identified in CT images, MRI images, and optical surface scan images.

3. The method for transmitting the state of a segmented support device during radiotherapy according to claim 1, characterized in that, The initial morphological parameter vector of the support components includes: the support height, tilt angle, and vacuum pad negative pressure value of the head, neck and shoulder support, chest and abdomen support, and lower limb support.

4. The method for transmitting the state of a segmented support device during radiotherapy according to claim 1, characterized in that, The expression for rigid registration error is: in For the first The spatial coordinates of a multimodal reference point in a CT image. For the first The initial spatial coordinates of the multimodal reference points during the simulation positioning phase. It is a three-dimensional Euclidean distance.

5. The method for transmitting the state of a segmented support device during radiotherapy according to claim 1, characterized in that, The expression for the support state deviation index is: in For the first Spatial coordinates of a multimodal reference point during real-time tracking and The weighting coefficients are preset and satisfy α+β=1. Let be the Euclidean norm of the difference between the morphological parameter vectors, and and Before calculation, it is normalized to a dimensionless vector.

6. The method for transmitting the state of a segmented support device during radiotherapy according to claim 1, characterized in that, The support state deviation index is assessed, and based on the assessment result, the treatment device is unlocked to allow beam delivery, or the locking is maintained, including: The support state deviation index is compared with the second preset threshold. If the support state deviation index is less than or equal to the second preset threshold, it is determined that the deviation between the current support state and the baseline state dataset is within the allowable range, and the treatment device is unlocked to allow beam output. Otherwise, the lock remains engaged, and the system prompts the user to adjust the support device to match the baseline state dataset.

7. A status transmission system for a segmented support device during radiotherapy, characterized in that, include: Baseline State Establishment Module: During the simulation positioning phase, the initial spatial coordinate set of multimodal reference points fixed on the sub-part support device is obtained, and the initial morphological parameter vectors of each support component are obtained through sensors and bound and stored as a baseline state dataset. Initial forced verification module: During CT simulation positioning, it acquires the current spatial coordinate set of the multimodal reference points, calculates the rigid registration error, and determines whether to execute the plan design; Real-time comparison module: Before treatment, it acquires the current spatial coordinate set and current morphological parameter vector of the multimodal reference point in real time and calculates the support state deviation index. Beam output control module: It judges the support status deviation index and, based on the judgment result, unlocks the treatment device to allow beam output or keeps it locked.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements a method for transmitting the status of a radiotherapy site support device as described in any one of claims 1 to 6.

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