CN116867547A

CN116867547A - Portal monitoring method, radiotherapy equipment, display device and system

Info

Publication number: CN116867547A
Application number: CN202080108423.9A
Authority: CN
Inventors: 闫浩; 李金升
Original assignee: Our United Corp
Current assignee: Our United Corp
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2023-10-10
Also published as: WO2022140997A1

Abstract

The application discloses a portal monitoring method, radiotherapy equipment, a display device and a system. Acquiring a planned portal image set for a multi-leaf collimator at a target moment in a preset user treatment plan; and acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment, namely outputting an observed image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition manner on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment. The application can enable operators to observe the deviation of the therapeutic dosage conveniently in real time, and improve the effective therapeutic rate.

Description

Portal monitoring method, radiotherapy equipment, display device and system

Technical Field

The application relates to the technical field of medical treatment, in particular to a portal monitoring method, radiotherapy equipment, a display device and a system.

Background

With the development of new radiotherapy technology, the tumor positioning accuracy and the radiotherapy accuracy are gradually improved. However, during the whole radiotherapy process, the target area is often deviated from the irradiation field due to the influence of factors such as positioning errors, respiratory movements of the patient, and changes in the shape and position of the treatment area. Thus, the greatest difficulty in radiation therapy is currently how to ensure that the tumor target receives an accurate dose of radiation.

Dose-guided radiotherapy (Dose-guided Radiation Therapy, DGRT) is widely used at home and abroad as a leading edge radiotherapy technique, and the radiotherapy plan is modified in time by monitoring the deviation of the actual received Dose and the planned Dose of the tumor and surrounding normal tissues in the split treatment or split treatment, so that the accurate coincidence of the treatment Dose and the planned Dose is ensured.

Technical problem

The prior upper computer of the radiotherapy equipment simulates and displays a portal image formed by the movement of a Multi-leaf Collimator (MLC) in an animation mode according to the received data of a treatment planning system (Treatment Planning System, TPS). Although existing methods can monitor dynamic portal images formed by the MLC during treatment, the bias conditions cannot be monitored in real time. Therefore, how to objectively and truly reflect the movement of MLC leaves, so that an operator can observe the deviation of therapeutic dose in real time is a technical problem to be solved.

Technical solution

The application provides a radiation field monitoring method, a radiotherapy device, a display device and a system, wherein by superposing and displaying an actual planned radiation field image and an actual radiation field image of a blade, whether deviation exists between the actual position fed back by a motor of the blade at the moment and the planned position or not can be more objectively reflected for an operator, and the deviation condition is monitored in real time, so that the operator can conveniently observe the treatment dosage deviation condition in real time, and the treatment effective rate is improved.

In one aspect, the present application provides a method for monitoring a field of view, applied to a radiotherapy apparatus, the radiotherapy apparatus including an electronic field imaging device, the method comprising: acquiring a planned portal image set for a multi-leaf collimator at a target moment in a preset user treatment plan; acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment; and outputting an observation image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment, wherein the plurality of portal images comprise the planned portal image.

In another aspect, the present application further provides a method for monitoring a portal, the method including: displaying a portal monitoring interface of the multi-leaf collimator; overlapping and displaying a planned portal image at a target moment and an actual portal image at the target moment on the portal monitoring interface so as to monitor portal image deviation of the multi-leaf collimator at the target moment; the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and/or a portal image shot by the electronic portal image device, and the planned portal image is a portal image planned in advance for the multi-leaf collimator in a treatment plan of a user.

In another aspect, the present application further provides a portal monitoring device applied to a radiotherapy apparatus, where the radiotherapy apparatus includes an electronic portal imaging device, and the portal monitoring device includes: the first acquisition module is used for acquiring a planned portal image set for the multi-leaf collimator at a target moment in a preset user treatment plan; the second acquisition module is used for acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment; and the output module is used for outputting an observed image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment, wherein the plurality of portal images comprise the planned portal image.

In another aspect, the present application also provides a portal monitoring device, including: the display module is used for displaying a field monitoring interface of the multi-leaf collimator; overlapping and displaying a planned portal image at a target moment and an actual portal image at the target moment on the portal monitoring interface so as to monitor portal image deviation of the multi-leaf collimator at the target moment; the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and/or a portal image shot by the electronic portal image device, wherein the planned portal image is a portal image planned in advance for the multi-leaf collimator in a treatment plan of a user, and the portal image shot by the electronic portal image device is an imaging contour formed after a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and a target area.

In another aspect, the present application further provides a radiotherapy apparatus, the radiotherapy apparatus including an electronic portal imaging device, the radiotherapy apparatus including: one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps in the radiotherapy device side-field monitoring method described above.

In another aspect, the present application also provides a display apparatus, including: one or more processors; a memory; and

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps in the portal monitoring method on the display device side.

On the other hand, the application also provides a radiation therapy system, which comprises a radiation therapy device and a display device, wherein the radiation therapy device is in communication connection with the display device, the radiation therapy device is the radiation therapy device, and the display device is the display device.

In another aspect, the present application also provides a computer readable storage medium having stored thereon a computer program, the computer program being loaded by a processor to perform the steps of the portal monitoring method.

Advantageous effects

According to the application, the planned field image and the actual field image at the pre-target moment are acquired, the observed image is output to the display device, so that a plurality of field images are displayed in a superposition mode on the display device, the field image deviation of the multi-leaf collimator at the target moment is monitored, and because the deviation of the field image can be intuitively monitored by an operator in the superposition display process of the planned field image and the actual field image, whether the deviation exists between the actual position fed back by the motor of the blade at the moment and the planned position can be more objectively reflected for the operator through superposition display of the actual planned field image and the actual field image of the blade, and the deviation condition is monitored in real time, so that the operator can conveniently observe the treatment dose deviation condition in real time, and the treatment efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a radiation therapy system provided in an embodiment of the present application;

FIG. 2 is a flowchart of an embodiment of a method for monitoring a portal provided by an embodiment of the present application;

FIG. 3 is a flow chart of one embodiment of step 203 in an embodiment of the present application;

FIG. 4 is a schematic diagram of an embodiment of the present application in which a planned portal image and an actual portal image are superimposed;

FIG. 5 is a schematic flow chart of one embodiment of step 201 in the own embodiment;

FIG. 6 is a schematic structural diagram of an embodiment of a portal monitoring device in accordance with the present application;

fig. 7 is a schematic structural view of an embodiment of the therapeutic apparatus in the embodiment of the present application.

Embodiments of the application

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

Some basic concepts involved in the embodiments of the present application will be first described below:

dose-guided radiation therapy: dose-guided radiation therapy is a frontier radiation therapy technique that monitors the actual dose deviation of tumors and surrounding normal tissues during fractional treatment or fractional treatment, and corrects the radiation therapy plan in time, thereby ensuring that the therapeutic dose and the planned dose coincide accurately.

Dose deviation: in general, radiation surgery and radiotherapy treatments include several phases. First, an accurate three-dimensional (3D) map (map) of an anatomical structure in a region of interest (head, body, etc.) is configured to determine the exact coordinates of a target within the anatomical structure, i.e., to locate a tumor or abnormality within the body and define its exact shape and size. Second, a path of motion for the radiation beam is calculated to deliver a dose distribution that is deemed acceptable by the surgeon taking into account a variety of medical constraints. During this phase, an expert panel developed a treatment plan using special computer software to optimally irradiate the tumor by designing the radiation beam and minimize the dose to surrounding normal tissue to converge on the target area from different angles and planes. The third stage is where radiation treatment planning is performed. During this phase, radiation doses are delivered to the patient according to a treatment plan prescribed using radiation therapy techniques, such as, for example, intensity Modulated Radiation Therapy (IMRT) and Volume Modulated Arc Therapy (VMAT). These techniques are commonly used with radiotherapy systems equipped with multi-leaf collimators (MLC), such as linear accelerators (linacs), to treat pathological anatomies (tumors, lesions, vascular malformations, neurological disorders, etc.) by delivering prescribed radiation doses (X-rays, gamma rays, electrons, protons, and/or ions) to the pathological anatomy while minimizing radiation exposure to surrounding tissues and critical anatomy.

There are many factors that cause a discrepancy between the prescribed radiation dose distribution and the actual dose delivered (i.e., the actual dose delivered to the target during radiation therapy). One such factor is uncertainty in the patient's position in the radiation therapy system. Other factors include uncertainties introduced by changes that may occur during the course of patient treatment. Such changes may include random errors (such as small differences in patient setup positions). Other sources are due to physiological changes that may occur if the patient's tumor regresses or if the patient loses weight during treatment. Another category of uncertainty includes motion. Because some actions may be more random and unpredictable, while other movements may be more regular, the movements may overlap with either category. There are many other sources of uncertainty such as a wrong patient, mechanical failure/calibration error/change is radiation output, corrupted data (the protocol does not agree with the calculated dose), a wrong treatment device (e.g., where the original treatment device is not operational at the moment, the patient may be treating on another treatment device). These uncertainties can affect the quality of treatment of the patient and the actual radiation dose delivered to the target, resulting in dose bias.

An electronic portal imaging system: also called an electronic field imaging device, english full name Electronic Portal Imaging Device, EPID for short, is a tool for acquiring images in the ray emitting direction by adopting an electronic technology when a ray beam irradiates a target area. The EPID based on the amorphous silicon flat panel detector can obtain better imaging with less dosage, has the advantages of small volume, high resolution, high sensitivity, wide influence range and the like, is a rapid two-dimensional dosage measurement system, and can not only correct and verify the size, shape, position and patient position of the field off-line, but also directly measure the dosage in the field.

The embodiment of the application provides a method for monitoring a radiation field, a radiotherapy device, a display device and a system, which are respectively described in detail below.

Referring to fig. 1, fig. 1 is a schematic view of a scenario of a radiotherapy system provided by an embodiment of the present application, where the radiotherapy system may include a radiotherapy apparatus 100 and a display device 200, where the radiotherapy apparatus 100 is in communication connection with the display device 200, the radiotherapy apparatus 100 may transmit data to the display device, a portal monitoring device, an electronic portal imaging device, etc. are integrated in the radiotherapy apparatus 100, such as the radiotherapy apparatus in fig. 1, and the radiotherapy apparatus 100 may collect a medical image or a portal image of a human body and output the medical image or the portal image to the display device 200.

In the embodiment of the present application, the radiotherapy apparatus 100 may be a CT apparatus, a CBCT apparatus or other medical imaging apparatuses, for example, an ultrasound apparatus (such as a B-ultrasound apparatus or a color ultrasound apparatus), a magnetic resonance imaging (Magnetic Resonance Imaging, MRI) apparatus, etc., which are not limited herein.

In embodiments of the application, the radiotherapy apparatus may also be a kV or MV energy Intensity Modulated Radiotherapy (IMRT) apparatus. The radiotherapy apparatus is delivered with a multi-leaf collimator (MLC), which may be a computer controlled mechanical beam shaping apparatus attached to the head of a linac (treatment head) and comprises an assembly of metal fingers (fingers) or leaves. MLC could be made, for example, of 120 movable leaves with leaf widths of 0.5 and/or 1.0 cm. For each beam direction, an optimized intensity profile is achieved by sequentially delivering various subfields optimized in shape and weight. From one subfield to the next, the leaves can be moved when the radiation beam is on (i.e., dynamic multi-leaf collimation (DMLC)) or when the radiation beam is moving off (i.e., segmented multi-leaf collimation (SMLC)).

In an embodiment of the present application, the display apparatus 200 may be a device including receiving and transmitting hardware, i.e., a device having receiving and transmitting hardware capable of performing bi-directional communication over a bi-directional communication link. Such a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display. The display device 200 may be a desktop terminal or a mobile terminal, and the display device 200 may be a display screen, or one of devices with display screens, such as a mobile phone, a tablet computer, and a notebook computer.

It will be appreciated by those skilled in the art that the application environment shown in fig. 1 is merely an application scenario of the present application, and is not limited to the application scenario of the present application, and other application environments may further include more or fewer display devices than those shown in fig. 1, or a network connection relationship of radiotherapy apparatuses, for example, only 1 display device is shown in fig. 1, and it will be appreciated that the radiotherapy system may further include one or more other display devices, which is not limited herein in particular.

In addition, as shown in fig. 1, the radiation therapy system can also include a memory 300 for storing data, such as medical image data, for example medical image data acquired by the radiation therapy device 100.

It should be noted that, the schematic view of the scenario of the radiation therapy system shown in fig. 1 is only an example, and the radiation therapy system and scenario described in the embodiment of the present application are for more clearly describing the technical solution of the embodiment of the present application, and do not constitute a limitation on the technical solution provided by the embodiment of the present application, and those skilled in the art can know that, with the evolution of the radiation therapy system and the appearance of a new service scenario, the technical solution provided by the embodiment of the present application is equally applicable to similar technical problems.

First, in an embodiment of the present application, a method for monitoring a portal is provided, including: acquiring a planned portal image set for a multi-leaf collimator at a target moment in a preset user treatment plan; acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment; and outputting an observation image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment, wherein the plurality of portal images comprise the planned portal image.

Referring to fig. 2, a flowchart of an embodiment of a method for monitoring a field according to the present application includes the following steps 201 to 203:

201. and acquiring a planned portal image set for the multi-leaf collimator at the target moment in a preset user treatment plan.

A treatment plan is pre-set for the user prior to delivering radiation treatment to the user, which may be by a Treatment Planning System (TPS), including a planned portal image set for the multi-leaf collimator at each instant.

202. And acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment.

In the embodiment of the present application, the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator, and/or a portal image shot by the electronic portal image device. The projection field image is a projection field image which is planned in advance for the multi-leaf collimator in a user treatment plan, and the projection field image shot by the electronic projection field imaging device is an imaging contour formed after a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area.

203. And outputting an observation image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment, wherein the plurality of portal images comprise the planned portal image.

Wherein the plurality of portal images includes a planned portal image.

It should be noted that, in the embodiment of the present application, since the function of the electronic portal imaging device in the prior art can directly measure the dose in the portal image area based on the portal image, the dose deviation can be directly estimated when determining the portal image deviation, so that the following process is not described in detail. In addition, the portal image described in the embodiment of the present application refers to only a portal image or an image corresponding to a portal region, and does not include a corresponding background region.

Since the accuracy of delivering a predicted radiation dose to a target volume based on a predetermined treatment plan plays an important role in the ultimate success or failure of radiation treatment, inaccurate dose delivery may result in insufficient radiation or excessive radiation to nearby healthy tissue and risky Organs (OAR). Too high a dose of radiation may result in serious damage to healthy tissue surrounding the tumor and to adjacent organs, while too low a dose may jeopardize the likelihood of healing.

Therefore, in this embodiment, by acquiring the planned portal image and the actual portal image at the pre-target time, and outputting the observed images to the display device, so as to display a plurality of portal images in a superimposed manner on the display device, and monitor the portal image deviation of the multi-leaf collimator at the target time.

In step 201, the observed images are output to the display device according to the planned portal image and the actual portal image, so that the display device displays a plurality of portal images in a superimposed manner, and various implementations are possible to monitor the portal image deviation of the multi-leaf collimator at the target moment, wherein the two aspects are divided according to the source of the portal image, and the following are respectively exemplified:

(1) Only acquiring the planned portal image and the portal image fed back by the motor

At this time, a plurality of field images, that is, a planned field image and a field image fed back by the motor, are superimposed and displayed on the display device. In the step 202, obtaining the actual field image corresponding to the multi-leaf collimator at the target time includes: and acquiring a field image fed back by a motor corresponding to the multi-leaf collimator at the target moment, wherein the field image fed back by the motor is a field image fed back by the motor of the multi-leaf collimator.

In the embodiment of the application, the MLC blade is fed back by a motor, so that the actual position of the blade motion can be obtained, and the field image fed back by the motor is the position reached by the blade angle and the self-measurement.

And at the moment, the observation images can be output to a display device according to the planned portal image and the portal image fed back by the motor so as to display a plurality of portal images in a superposition manner on the display device, the portal image deviation of the multi-leaf collimator at the target moment is monitored, and only one display mode is adopted, namely a single display window is adopted to display the planned portal image and the portal image fed back by the motor in a superposition manner.

Specifically, outputting an observation image to a display device according to a planned field image and the actual field image so as to display a plurality of field images superimposed on the display device, and monitoring a field image deviation of the multi-leaf collimator at a target time, the method including: and outputting an observation image to a display device according to the planned field image and the field image fed back by the motor so as to display the planned field image and the field image fed back by the motor in a superposition manner on the display device, and monitoring the field image deviation of the multi-leaf collimator at the target moment.

(2) The method comprises the steps of collecting and acquiring a planned portal image and a portal image shot by an electronic portal imaging device

At this time, the actual portal image includes a portal image shot by the electronic portal image device;

the outputting, according to the planned portal image and the actual portal image, an observation image to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including: and outputting an observation image to a display device according to the planned portal image and the portal image fed back by the motor so as to display the portal image shot by the planned portal image and the electronic portal image device in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.

(3) Acquiring a planned portal image, a portal image fed back by a motor and a portal image shot by an electronic portal imaging device

At this time, the embodiment of the application further acquires the portal image shot by the electronic portal image device at the target moment on the basis of acquiring the portal image fed back by the motor, namely, the portal monitoring method further comprises the following steps: and acquiring a portal image shot by the electronic portal imaging device corresponding to the multi-leaf collimator at the target moment.

Correspondingly, the outputting, by the display device, the observed image according to the planned portal image and the portal image captured by the electronic portal imaging device, so as to display a plurality of portal images in a superimposed manner on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including: and outputting an observation image to a display device according to the planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor so as to display a plurality of portal images in a superposition way on the display device and monitor the portal image deviation of the multi-leaf collimator at the target moment.

Because three portal images are collected, a plurality of implementation modes are displayed by overlapping the portal images, and the portal images can be selected according to actual application scenes during specific implementation, and the following examples are provided for illustration:

1) Simultaneously displaying three portal images in a superimposed manner

At this time, the outputting of the observation image to the display device according to the planned portal image, the portal image captured by the electronic portal imaging device and the portal image fed back by the motor, so as to display a plurality of portal images superimposed on the display device, and the monitoring of the portal image deviation of the multi-leaf collimator at the target time, includes: and outputting an observation image to a display device according to the planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor, so as to display the planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor in a superposition manner on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment. The planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor are overlapped together at the same time.

Since in the established portal monitoring method, if the measured radiation is different from the expected radiation after being monitored by the portal, the treatment may be stopped. In fact, however, in some examples, the field of radiation is intentionally made larger than the target. For example, in arc therapy treatment, tangential fields are more likely to occur because all radial directions in a plane are used. Thus, when all points irradiated by the beam are used for real-time evaluation of the treatment, the established dose evaluation method may falsely detect a dose error and trigger stopping of the radiation treatment. Therefore, the single comparison of the two portal images may cause some comparison errors, in this embodiment, the portal image deviation of the multi-leaf collimator at the target moment is monitored through the superposition display of the three portal images, so that the accuracy of the deviation can be further verified based on the comparison of the multidimensional dimensions, the errors caused by the single comparison of the two portal images with other interference factors are avoided, and the judgment accuracy of portal monitoring is improved.

2) Three portal images are acquired, and partial images are actually and selectively overlapped

In practical application, because the size of the EPID is limited, it is difficult to meet the requirement of large portal imaging, the edge of the leaf in the portal image shot by the electronic portal image device formed by the MLC is not displayed on the EPID, that is, when the portal image shot by the electronic portal image device (i.e. the portal image shot by the EPID) is larger than the maximum portal range (size) of the EPID, the edge of the leaf cannot be displayed on the EPID.

To improve the defect in this case, in some embodiments of the present application, as shown in fig. 3, the outputting of the observed image to a display device according to the planned portal image and the actual portal image to display a plurality of portal images superimposed on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target time, includes the following steps 301 to 302:

301. and judging whether the shot field image shot by the electronic field imaging device exceeds the maximum field range of the electronic field imaging device.

If the field image shot by the electronic field imaging device has an area exceeding the maximum field range, step 302 is executed, and if the field image shot by the electronic field imaging device does not have an area exceeding the maximum field range, step 303 is executed.

302. And outputting an observation image to a display device according to the planned portal image and the portal image fed back by the motor so as to display the planned portal image and the portal image fed back by the motor in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.

If the field image shot by the electronic field imaging device has an area exceeding the maximum field range, that is, the edge of the blade representing the field image shot by the electronic field imaging device cannot be displayed on the EPID, so that the field image shot by the electronic field imaging device can be displayed without being overlapped, the situation that the field image is not displayed is avoided, and an observation image is output to a display device only according to the planned field image and the field image fed back by the motor, so that the planned field image and the field image fed back by the motor are displayed in an overlapped mode on the display device.

Further, in some embodiments of the present application, the outputting, according to the planned portal image and the actual portal image, an observation image to a display device so as to display a plurality of portal images in a superimposed manner on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, further includes the following step 303:

303. And outputting an observation image to a display device according to the planned portal image and the portal image shot by the electronic portal image device so as to display the portal image shot by the planned portal image and the electronic portal image device in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.

At this time, if the field image shot by the electronic field imaging device does not have an area exceeding the maximum field range, that is, the edge of the blade representing the field image shot by the electronic field imaging device may be displayed on the EPID, and the field images shot by the electronic field imaging device may be displayed in a superimposed manner, so that the planned field image and the field image shot by the electronic field imaging device may be displayed in a superimposed manner on the display device, and the field image deviation of the multi-leaf collimator at the target time may be monitored, specifically, the planned field image and the field image shot by the electronic field imaging device may be displayed in a superimposed manner, as shown in fig. 4.

By superposing and displaying the portal image and the planned portal image shot by the electronic portal image device, whether deviation exists between the actual position and the planned position of the blade at the moment can be more objectively reflected for an operator, and the deviation condition is monitored in real time, so that the operator can conveniently observe the treatment dosage deviation condition in real time.

The plurality of portal images must be synchronized in time. For example, related data of a portal image (planned portal image) formed by the MLC is issued by the TPS at a frequency of 3 times/S, and is displayed in the form of animation at a frequency of 5 frames/S through interpolation improvement, and the EPID is displayed in real time at a frequency of 5 frames/S to extract the outline shape of the target area, and is displayed in the form of an image (portal image captured by the electronic portal imaging device), and at the same time, the planned portal image and the portal image captured by the electronic portal imaging device extracted by the EPID are synchronized in time.

Therefore, when the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator, the acquiring the actual portal image corresponding to the multi-leaf collimator at the target time may include: acquiring a portal image fed back by a motor at a first moment; and interpolating on a time line of the field image fed back by the motor according to the field image fed back by the motor at the first moment, and determining the field image fed back by the motor at the target moment.

Further, the obtaining the portal image fed back by the motor at the first moment includes: acquiring motor feedback positions of each blade of the multi-blade collimator at a first moment, wherein the motor feedback positions of each blade can comprise a position reached by the blade through self-measurement and/or a position reached by the blade through a position feedback system, wherein the position reached by the blade through self-measurement is a position determined by an angle of a motor of the motor, the position reached by the blade through the position feedback system represents an actual movement position of the blade, and compared with the position reached by the blade through self-measurement, the position reached by the blade through the position feedback system is more accurate; determining the actual position of each blade of the multi-blade collimator according to the motor feedback position of each blade of the multi-blade collimator; and drawing the positions of the blades of the multi-blade collimator according to the actual positions of the blades of the multi-blade collimator to obtain a portal image fed back by the motor at the first moment.

In addition, when the actual portal image includes a portal image captured by an electronic portal imaging device, the acquiring the actual portal image corresponding to the multi-leaf collimator at the target time includes: acquiring a portal image shot by the electronic portal image device at a second moment; and interpolating on a time line of the actual portal image according to the actual portal image at the second moment to determine the portal image shot by the electronic portal image device.

Further, the obtaining the portal image captured by the electronic portal image device at the second moment includes: when a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area at the second moment, acquiring an imaging pattern of the treatment beam after passing through the multi-leaf collimator and the target area by the electronic portal imaging device; and determining the outline of the imaging pattern as an actual portal image of the multi-leaf collimator at a second moment.

In an embodiment of the present application, as shown in fig. 5, when the actual portal image includes a portal image captured by an electronic portal imaging device, the acquiring an actual portal image corresponding to the multi-leaf collimator at the target time may further include the following steps 501 to 503:

501. And when the treatment beam emitted by the treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area at the second moment, acquiring an imaging pattern of the treatment beam after passing through the multi-leaf collimator and the target area by the electronic portal imaging device.

It should be noted that the target area described in the embodiments of the present application may be a certain tissue or organ of a human body, for example, a skull, or an organ such as a lung, a liver, etc.

502. And determining the outline of the imaging pattern as a portal image shot by the electronic portal imaging device of the multi-leaf collimator at the second moment.

503. And interpolating on a time line of the portal image shot by the electronic portal image device according to the portal image shot by the electronic portal image device at the second moment, and determining the portal image shot by the electronic portal image device.

In some embodiments of the present application, the display interface of the display device may be one display window, or may include a plurality of display windows.

In one specific embodiment, the display device includes a first display window, and the plurality of portal images includes the planned portal image and a portal image fed back by the motor; and the planned portal image and the portal image shot by the electronic portal image device are displayed on a first display window of the display device in a superposition mode.

In another specific embodiment, the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator and a portal image shot by the electronic portal imaging device; the outputting, according to the planned portal image and the actual portal image, an observation image to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including: outputting an observation image to a display device according to the planned portal image and the actual portal image, so as to display the planned portal image and the target portal image in a superposition manner on a first display window of the display device, and display the planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor in a superposition manner on a second display window of the display device;

the target portal image is a portal image fed back by a motor of the multi-leaf collimator or a portal image shot by the electronic portal image device.

Further, the first display window and the second display window are different, and the first display window and the second display window can be vertically juxtaposed or horizontally juxtaposed, and the sizes of the first display window and the second display window can be the same or different, and can be specifically set according to actual application scenes. For example, the layout manner of the first display window and the second display window on the display interface of the display device may be a vertically parallel bisecting display interface, or may be a horizontally parallel bisecting display interface, which may be understood that, in practical application, the first display window and the second display window may be further laid out on the display interface according to a preset area ratio, for example, the area ratio of the first display window to the second display window is 2:1, etc., may be specifically set as needed, and is not limited herein.

In addition, it should be noted that, in the foregoing embodiment, the two display windows are displayed on the portal monitoring interface of the display device by way of example only, and it is understood that a plurality of display windows may be displayed in practical application, for example, the first display window, the second display window, and the third display window described in the foregoing embodiment may be displayed simultaneously.

In some embodiments of the present application, in addition to the overlapping display, a plurality of portal images may also be displayed alternately on a display device, for example, a planned portal image and an actual portal image, where the outputting, according to the planned portal image and the actual portal image, an observation image to the display device to overlap display the plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time includes: and outputting an observation image to a display device according to the planned portal image and the portal image shot by the electronic portal image device so as to alternately display the planned portal image and the portal image shot by the electronic portal image device in a superimposed manner on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment.

Specifically, the planned field image and the field image captured by the electronic field imaging device are alternately displayed in a superimposed manner on the display device, and the planned field image and the field image captured by the electronic field imaging device are displayed in a superimposed manner, but are alternately displayed above at a predetermined time interval, for example, the planned field image is displayed in a superimposed manner on the field image captured by the electronic field imaging device at time point 1, and the field image captured by the electronic field imaging device is displayed in a superimposed manner on the planned field image at time point 2.

The observation image may be a dynamic image formed by combining the planned portal image and the portal image captured by the electronic portal image device, where each frame of image included in the dynamic image is an image formed by combining the planned portal image and the portal image captured by the electronic portal image device, taking the planned portal image as an image 1, the portal image captured by the electronic portal image device as an example, the dynamic image is formed by combining three frames of images (image 12, image 21, and image 12), where image 12 is a composite image formed by superimposing image 1 on image 2, and image 21 is a composite image formed by superimposing image 2 on image 1.

For example, the observed image may be a currently existing dynamic image format, such as a GIF image, or a new dynamic image format in the future, where only the dynamic image is needed, and the method is not limited in particular

In one embodiment, a "time setting" button may be set on the portal monitoring interface of the display device, for example, after a sliding bar for adjusting transparency of a medical image is set, when the "time setting" button is triggered, a drop-down list is displayed, where a plurality of options of 0.25 seconds, 0.5 seconds, or 1 second for selectable time intervals are displayed in the drop-down list, for example, after an operator selects an interval time, the operator starts to display a dynamic image under the image output interval in the portal monitoring interface, and in another embodiment, a "time setting" checkbox may be set on the portal monitoring interface of the display device, and after the checkup, the dynamic image may start to be displayed in the portal monitoring interface. The image output time interval may be a default value, or may be set by means of a "switching time" adjustment progress bar, a "switching time setting" button, or the like. In the embodiment of the present application, the interface display mode for setting the image output time interval may be various, and is not limited.

Further, in order to distinguish different portal images when different portal images are superimposed, the different portal images may be displayed with lines of different colors. Specifically, in some embodiments of the present application, a contour line corresponding to the planned portal image in the observed image is a first color, and a contour line of the actual portal image in the observed image is a second color, where the first color and the second color are different. Further, in the case that the actual portal image includes a portal image fed back by the motor of the multi-leaf collimator and a portal image captured by the electronic portal imaging device, a contour line of the portal image fed back by the motor is a third color, a contour line of the portal image captured by the electronic portal imaging device is a fourth color, and the first color, the third color, the fourth color, and the like are different.

For example, a planned portal image is displayed by red lines, a portal image captured by an electronic portal imaging device is displayed by green lines, and a portal image fed back by a motor is displayed by blue lines.

In the present application, in order to facilitate acquisition of a planned portal image, before the acquisition of the planned portal image set for the multi-leaf collimator at the target time in the preset user treatment plan, the method may further include: setting a control point for each treatment moment when making the user treatment plan, wherein each control point corresponds to the current frame rotation angle of the electronic portal imaging device;

at this time, the step 201 of obtaining the planned portal image set for the multi-leaf collimator at the target time in the preset user treatment plan includes: acquiring a planned portal image at a third moment; and interpolating on a time line of the planned portal image according to the planned portal image at the third moment to determine the planned portal image.

In some embodiments of the present application, before the acquiring the planned portal image set for the multi-leaf collimator at the target time in the preset user treatment plan, the method further includes: when the user treatment plan is formulated, a control point is set for each treatment moment, and each control point corresponds to the current frame rotation angle of the electronic portal imaging device.

At this time, the acquiring the planned portal image at the third time includes: determining a target control point at a third moment; and according to the target control point at the third moment, the positions of the blades of the multi-blade collimator are sketched, and a planned portal image at the third moment is obtained.

It should be noted that, in some embodiments of the present application, the first time may be a time when a time line of a field image fed back by the motor is closest to the target time, the second time may be a time when a time line of an actual field image is closest to the target time, and the third time may be a time when a time line of an actual field image is closest to the target time. In other embodiments of the present application, the target time may be one of the first time, the second time, or the third time. Taking the target time as a third time as an example, the first time can be the time of actually collecting the field image fed back by the motor when the target time responds to the field image fed back by the motor; the second time may be a time when the field image captured by the electronic field imaging device is actually captured when the target time is in response to capturing the field image captured by the electronic field imaging device, for example, the target time is 5s, the field image fed back by the motor when the target time is 5s needs to be captured, but the first time when the field image fed back by the motor is captured is 5.3s due to external factors such as equipment delay.

In addition, in other embodiments of the present application, since the planned portal image is predetermined, the planned portal image may be used as a reference, for example, the time of the planned portal image is used as the target time, no interpolation is needed on the planned portal image, it is assumed that the portal image captured by the electronic portal image device is at 5.3 seconds (the second time), the portal image fed back by the motor is at 5.1 seconds (the first time), the planned portal image is at 5 seconds (the target time), the target time is 5s, the portal image captured by the electronic portal image device is acquired by the motor, and the actual acquisition time is 5.1s,5.3s, respectively, after interpolation is performed on the respective time lines of the portal image captured by the electronic portal image device and the portal image captured by the electronic portal image device, the portal image fed back by the motor at 5s and the portal image captured by the electronic portal image device may be determined.

In an embodiment of the present application, after outputting an observation image to a display device according to the planned portal image and the portal image captured by the electronic portal image device, a portal deviation of the planned portal image and the portal image captured by the electronic portal image device may be determined, so that a treatment plan for the next time is adjusted according to the deviation existing after the superimposition to compensate for the portal deviation, so further, after outputting the observation image to the display device according to the planned portal image and the portal image captured by the electronic portal image device, the method may further include: acquiring a request of a user to adjust the user treatment plan; and according to the request, adjusting a planned portal image set for the multi-leaf collimator at a fourth moment in the user treatment plan, wherein the fourth moment is a moment after the target moment.

For example, under an extreme condition, assuming that the MLC motion of the radiotherapy apparatus is slow at each gantry rotation angle, and the upper computer does not check the time delay, the problem can be found by superimposing the planned portal image displayed and the portal image captured by the electronic portal imaging device (which is monitoring of the angle of the independent third party), and checking the leaf motors of the MLC in time.

Further, the adjusting the planned portal image set for the multi-leaf collimator at the fourth moment in the user treatment plan according to the request includes: calculating the actual deviation amount of the planned portal image and the actual portal image according to the request; and adjusting a planned portal image set for the multi-leaf collimator at a fourth moment in the user treatment plan based on the actual deviation amount.

In some embodiments of the present application, the target observation images in each adjustment process in the portal monitoring may be saved, so that each dose adjustment verification has evidence to be saved, which is convenient for the subsequent use in the situations where medical disputes occur or other situations where the portal images need to be traced back.

Specifically, in some embodiments of the present application, the method for monitoring the portal may further include: after each time a request for a user to adjust the user treatment plan is acquired, collecting time information of the current request; and storing the target observation images corresponding to the time information to form a target observation image set with different times. The method comprises the steps of storing target observation images during current wild monitoring when the wild monitoring is adjusted, forming a target observation image set on a time axis, and facilitating subsequent backtracking and viewing of the wild monitoring record.

Further, the method for monitoring the portal may further include a backtracking step, and specifically, the method for monitoring the portal may further include: acquiring a portal monitoring history backtracking instruction aiming at a user, wherein the portal monitoring history backtracking instruction comprises backtracking time information; acquiring a backtracking target observation image corresponding to the backtracking time information in the target observation image set; and outputting the backtracking target observation image to the display device for display. Specifically, a backtracking control may be displayed on a portal monitoring interface of the display device, after a user clicks the backtracking control, a backtracking time input box or a selection box may be displayed, the backtracking time is determined, and after the user determines the backtracking time, a portal monitoring history backtracking instruction is generated, and based on the backtracking time information, a backtracking target observation image in the target observation image set stored in the above embodiment may be obtained.

In addition, the application also provides a portal monitoring method, which is applied to a display device, and comprises the following steps: displaying a portal monitoring interface of the multi-leaf collimator; overlapping and displaying a planned portal image at a target moment and an actual portal image at the target moment on the portal monitoring interface so as to monitor portal image deviation of the multi-leaf collimator at the target moment; the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and/or a portal image shot by the electronic portal image device, wherein the planned portal image is a portal image planned in advance for the multi-leaf collimator in a treatment plan of a user, and the portal image shot by the electronic portal image device is an imaging contour formed after a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and a target area.

In some embodiments of the application, the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator, and the portal monitoring interface comprises a first display window; the step of superposing and displaying the planned field image of the target moment and the actual field image of the target moment on the field monitoring interface so as to monitor the field image deviation of the multi-leaf collimator at the target moment comprises the following steps: and superposing and displaying a planned portal image at a target moment and a portal image fed back by a motor at the target moment on the first display window so as to monitor portal image deviation of the multi-leaf collimator at the target moment.

Further, the actual portal image further comprises a portal image shot by the electronic portal image device, and the portal monitoring interface further comprises a second display window; at this time, the method further includes:

and superposing and displaying a planned portal image at the target moment and a portal image shot by the electronic portal image device at the target moment on the second display window so as to monitor the portal image deviation of the multi-leaf collimator at the target moment.

The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.

In order to better implement the portal monitoring method according to the embodiment of the present application, on the basis of the portal monitoring method, the embodiment of the present application further provides a portal monitoring device, which is applied to a radiotherapy apparatus, where the radiotherapy apparatus includes an electronic portal imaging device, as shown in fig. 6, and the portal monitoring device 600 includes:

a first obtaining module 601, configured to obtain a planned portal image set for a multi-leaf collimator at a target time in a preset user treatment plan;

a second obtaining module 602, configured to obtain an actual portal image corresponding to the multi-leaf collimator at the target moment;

and an output module 603, configured to output an observed image to a display device according to the planned portal image and the actual portal image, so as to display a plurality of portal images in a superimposed manner on the display device, and monitor a portal image deviation of the multi-leaf collimator at the target time, where the plurality of portal images includes the planned portal image.

In this embodiment, the first acquiring module 601 and the second acquiring module 602 acquire the planned portal image and the actual portal image at the pre-target moment, the output module 603 outputs the observed image to the display device, so as to display a plurality of portal images in a superimposed manner on the display device, monitor the portal image deviation of the multi-leaf collimator at the target moment, and because in the process of superposing and displaying the planned portal image and the actual portal image, an operator can intuitively monitor the deviation of the portal image, and by superposing and displaying the actual planned portal image and the actual portal image of the leaf, whether the deviation exists between the actual position and the planned position of the leaf at the moment can be reflected for the operator more objectively, and the deviation condition is monitored in real time, so that the operator can observe the treatment dose deviation condition conveniently in real time, and the treatment efficiency is improved.

In some embodiments of the present application, the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator, and/or a portal image captured by the electronic portal imaging device.

In some embodiments of the application, the actual portal image comprises a motor fed-back portal image of a multi-leaf collimator;

the output module 603 is specifically configured to:

and outputting an observation image to a display device according to the planned portal image and the portal image fed back by the motor so as to display the planned portal image and the portal image fed back by the motor in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.

In some embodiments of the present application, the second obtaining module 602 is specifically configured to:

acquiring a portal image fed back by a motor at a first moment;

and interpolating on a time line of the field image fed back by the motor according to the field image fed back by the motor at the first moment, and determining the field image fed back by the motor at the target moment.

acquiring motor feedback positions of all blades of the multi-blade collimator at a first moment, wherein the motor feedback position of each blade comprises a position reached by the self-measurement of the blade and/or a position reached by the blade measured by a position feedback system;

Determining the actual position of each blade of the multi-blade collimator according to the motor feedback position of each blade of the multi-blade collimator;

and drawing the positions of the blades of the multi-blade collimator according to the actual positions of the blades of the multi-blade collimator to obtain a portal image fed back by the motor at the first moment.

In some embodiments of the present application, the actual portal image includes a portal image captured by an electronic portal imaging device;

the output module 603 is specifically configured to:

and outputting an observation image to a display device according to the planned portal image and the portal image fed back by the motor so as to display the portal image shot by the planned portal image and the electronic portal image device in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.

acquiring a portal image shot by the electronic portal image device at a second moment;

and interpolating on a time line of the actual portal image according to the actual portal image at the second moment to determine the portal image shot by the electronic portal image device.

when a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area at the second moment, acquiring an imaging pattern of the treatment beam after passing through the multi-leaf collimator and the target area by the electronic portal imaging device;

and determining the outline of the imaging pattern as an actual portal image of the multi-leaf collimator at a second moment.

In some embodiments of the present application, the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator and a portal image captured by the electronic portal imaging device;

the output module 603 is specifically configured to:

and if the field image shot by the electronic field imaging device has an area exceeding the maximum field range, outputting an observation image to a display device according to the planned field image and the field image fed back by the motor so as to display the planned field image and the field image fed back by the motor in a superposition manner on the display device, and monitoring the field image deviation of the multi-leaf collimator at the target moment.

In some embodiments of the present application, the output module 603 is specifically further configured to:

And if the field image shot by the electronic field imaging device does not have an area exceeding the maximum field range, outputting an observation image to a display device according to the planned field image and the field image shot by the electronic field imaging device so as to display the planned field image and the field image shot by the electronic field imaging device in a superposition manner on the display device, and monitoring the field image deviation of the multi-leaf collimator at the target moment.

the output module 603 is specifically further configured to:

outputting an observation image to a display device according to the planned portal image and the actual portal image, so as to display the planned portal image and the target portal image in a superposition manner on a first display window of the display device, and display the planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor in a superposition manner on a second display window of the display device;

In some embodiments of the present application, the output module 603 is specifically configured to:

and outputting an observed image to a display device according to the planned portal image and the actual portal image so as to alternately display the planned portal image and the actual portal image in a superimposed mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment.

In some embodiments of the present application, the first obtaining module 601 is specifically configured to:

acquiring a planned portal image at a third moment;

and interpolating on a time line of the planned portal image according to the planned portal image at the third moment to determine the planned portal image.

In some embodiments of the present application, the apparatus further includes a setting module, where the setting module is specifically configured to:

before a planned portal image set for a multi-leaf collimator at a target moment in a preset user treatment plan is acquired, setting a control point for each treatment moment when the user treatment plan is formulated, wherein each control point corresponds to the current frame rotation angle of the electronic portal imaging device;

the first obtaining module 601 is specifically configured to:

determining a target control point at a third moment;

And according to the target control point at the third moment, the positions of the blades of the multi-blade collimator are sketched, and a planned portal image at the third moment is obtained.

In some embodiments of the present application, the outline corresponding to the planned portal image in the observed image is a first color, the outline of the actual portal image in the observed image is a second color, and the first color and the second color are different.

In some embodiments of the present application, when the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator and a portal image captured by the electronic portal image device, a contour line of the portal image fed back by the motor is a third color, and a contour line of the portal image captured by the electronic portal image device is a fourth color.

In some embodiments of the present application, the apparatus further comprises an adjustment module, specifically configured to:

after the observed images are output to a display device according to the planned portal image and the actual portal image, acquiring a request of a user for adjusting the user treatment plan;

and according to the request, adjusting a planned portal image set for the multi-leaf collimator at a fourth moment in the user treatment plan, wherein the fourth moment is a moment after the target moment.

In some embodiments of the present application, the adjustment module is specifically configured to:

calculating the actual deviation amount of the planned portal image and the actual portal image according to the request;

and adjusting a planned portal image set for the multi-leaf collimator at a fourth moment in the user treatment plan based on the actual deviation amount.

Correspondingly, the application also provides a portal monitoring device which is applied to the display device, and the portal monitoring device comprises:

the display module is used for displaying a field monitoring interface of the multi-leaf collimator; overlapping and displaying a planned portal image at a target moment and an actual portal image at the target moment on the portal monitoring interface so as to monitor portal image deviation of the multi-leaf collimator at the target moment;

the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and/or a portal image shot by the electronic portal image device, wherein the planned portal image is a portal image planned in advance for the multi-leaf collimator in a treatment plan of a user, and the portal image shot by the electronic portal image device is an imaging contour formed after a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and a target area.

In some embodiments of the application, the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator, and the portal monitoring interface comprises a first display window;

the display module is specifically used for:

and superposing and displaying a planned portal image at a target moment and a portal image fed back by a motor at the target moment on the first display window so as to monitor portal image deviation of the multi-leaf collimator at the target moment.

In some embodiments of the present application, the portal monitoring interface further comprises a second display window;

the display module is specifically further configured to:

and superposing and displaying a planned portal image at a target moment and a portal image shot by the electronic portal image device at the target moment on the second display window so as to monitor the portal image deviation of the multi-leaf collimator at the target moment.

The embodiment of the application also provides a radiotherapy device, which integrates any of the portal monitoring devices provided by the embodiment of the application, wherein the radiotherapy device comprises an electronic portal imaging device, and the radiotherapy device further comprises:

one or more processors;

a memory;

and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to perform the steps of the portal monitoring method described in any of the portal monitoring method embodiments on the radiotherapy device side described above.

The present application also provides a display device including:

one or more processors;

a memory; and

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement steps in the portal monitoring method as described above on the display device side.

In addition, the application also provides a radiation therapy system, which comprises a radiation therapy device and a display device, wherein the radiation therapy device is in communication connection with the display device, the radiation therapy device is the radiation therapy device described in any embodiment, and the display device is the display device described in any embodiment.

The embodiment of the application also provides a radiotherapy device which integrates any of the portal monitoring devices provided by the embodiment of the application. As shown in fig. 7, a schematic structural diagram of a radiotherapy apparatus according to an embodiment of the present application is shown, specifically:

the radiotherapy apparatus may comprise one or more processors 701 of a processing core, one or more memories 702 of a computer readable storage medium, a power supply 703, an input unit 704, etc. It will be appreciated by those skilled in the art that the radiotherapy apparatus structure shown in fig. 7 is not limiting of the radiotherapy apparatus and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components. Wherein:

The processor 701 is a control center of the radiotherapy apparatus, and connects various parts of the whole radiotherapy apparatus with various interfaces and lines, and executes various functions and processing data of the radiotherapy apparatus by running or executing software programs and/or modules stored in the memory 702 and calling data stored in the memory 702, thereby performing overall monitoring of the radiotherapy apparatus. Optionally, processor 701 may include one or more processing cores; preferably, the processor 701 may integrate an application processor and a modem processor, wherein the application processor primarily handles operating systems, user interfaces, applications, etc., and the modem processor primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 701.

The memory 702 may be used to store software programs and modules, and the processor 701 executes various functional applications and data processing by executing the software programs and modules stored in the memory 702. The memory 702 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created from the use of the radiotherapy apparatus, etc. In addition, the memory 702 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 volatile solid-state storage device. Accordingly, the memory 702 may also include a memory controller to provide access to the memory 702 by the processor 701.

The radiotherapy apparatus further comprises a power supply 703 for supplying power to the various components, and preferably the power supply 703 may be logically connected to the processor 701 by a power management system, so that functions such as charge, discharge, and power consumption management may be implemented by the power management system. The power supply 703 may also include one or more of any component, such as a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

The radiotherapy apparatus may further comprise an input unit 704, the input unit 704 being operable to receive input digital or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

Although not shown, the radiotherapy apparatus may further include a display unit or the like, which is not described here. In particular, in this embodiment, the processor 701 in the radiotherapy device loads executable files corresponding to the processes of one or more application programs into the memory 702 according to the following instructions, and the processor 701 executes the application programs stored in the memory 702, so as to implement various functions as follows:

acquiring a planned portal image set for a multi-leaf collimator at a target moment in a preset user treatment plan;

Acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment;

and outputting an observation image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment, wherein the plurality of portal images comprise the planned portal image.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.

To this end, an embodiment of the present application provides a computer-readable storage medium, which may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like. On which a computer program is stored, which is loaded by a processor to perform the steps of any of the method for portal monitoring provided by the embodiments of the present application. For example, the loading of the computer program by the processor may perform the steps of:

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.

In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may refer to the foregoing method embodiment and will not be repeated herein.

The above describes in detail a method, a radiotherapy device, a display device and a system for monitoring a portal provided by the embodiments of the present application, and specific examples are applied to illustrate the principles and implementation of the present application, where the above description of the embodiments is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims

A portal monitoring method for a radiotherapy apparatus, the radiotherapy apparatus comprising an electronic portal imaging device, the method comprising:

acquiring a planned portal image set for a multi-leaf collimator at a target moment in a preset user treatment plan;

acquiring an actual portal image corresponding to the multi-leaf collimator at the target moment;

and outputting an observation image to a display device according to the planned portal image and the actual portal image so as to display a plurality of portal images in a superposition mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment, wherein the plurality of portal images comprise the planned portal image.
The portal monitoring method of claim 1, wherein the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and/or a portal image captured by the electronic portal imaging device.
The portal monitoring method of claim 2, wherein the actual portal image comprises a motor fed-back portal image of a multi-leaf collimator;

the outputting, according to the planned portal image and the actual portal image, an observation image to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including:

And outputting an observation image to a display device according to the planned portal image and the portal image fed back by the motor so as to display the planned portal image and the portal image fed back by the motor in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.
The method of claim 3, wherein the acquiring the actual field image corresponding to the multi-leaf collimator at the target time comprises:

acquiring a portal image fed back by a motor at a first moment;

and interpolating on a time line of the field image fed back by the motor according to the field image fed back by the motor at the first moment, and determining the field image fed back by the motor at the target moment.
The portal monitoring method of claim 2, wherein the actual portal image comprises a portal image captured by an electronic portal imaging device;

the outputting, according to the planned portal image and the actual portal image, an observation image to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including:

And outputting an observation image to a display device according to the planned portal image and the portal image fed back by the motor so as to display the portal image shot by the planned portal image and the electronic portal image device in a superposition way on the display device, and monitoring the portal image deviation of the multi-leaf collimator at the target moment.
The method of claim 5, wherein the acquiring the actual field image corresponding to the multi-leaf collimator at the target time comprises:

acquiring a portal image shot by the electronic portal image device at a second moment;

and interpolating on a time line of the actual portal image according to the actual portal image at the second moment to determine the portal image shot by the electronic portal image device.
The method of claim 6, wherein the acquiring the portal image captured by the electronic portal imaging device at the second moment comprises:

when a treatment beam emitted by a treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area at the second moment, acquiring an imaging pattern of the treatment beam after passing through the multi-leaf collimator and the target area by the electronic portal imaging device;

And determining the outline of the imaging pattern as an actual portal image of the multi-leaf collimator at a second moment.
The portal monitoring method of claim 2, wherein the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and a portal image captured by the electronic portal imaging device;

the outputting, according to the planned portal image and the actual portal image, an observation image to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including:

and if the field image shot by the electronic field imaging device has an area exceeding the maximum field range, outputting an observation image to a display device according to the planned field image and the field image fed back by the motor so as to display the planned field image and the field image fed back by the motor in a superposition manner on the display device, and monitoring the field image deviation of the multi-leaf collimator at the target moment.
The portal monitoring method of claim 8, wherein the outputting of the observation image to a display device based on the planned portal image and the actual portal image to superimpose and display a plurality of portal images on the display device, monitors a portal image deviation of the multi-leaf collimator at the target time, further comprises:

And if the field image shot by the electronic field imaging device does not have an area exceeding the maximum field range, outputting an observation image to a display device according to the planned field image and the field image shot by the electronic field imaging device so as to display the planned field image and the field image shot by the electronic field imaging device in a superposition manner on the display device, and monitoring the field image deviation of the multi-leaf collimator at the target moment.
The portal monitoring method of claim 2, wherein the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and a portal image captured by the electronic portal imaging device;

the outputting, according to the planned portal image and the actual portal image, an observation image to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, including:

outputting an observation image to a display device according to the planned portal image and the actual portal image, so as to display the planned portal image and the target portal image in a superposition manner on a first display window of the display device, and display the planned portal image, the portal image shot by the electronic portal image device and the portal image fed back by the motor in a superposition manner on a second display window of the display device;

The target portal image is a portal image fed back by a motor of the multi-leaf collimator or a portal image shot by the electronic portal image device.
The portal monitoring method of claim 1, wherein the outputting of the observation image to a display device based on the planned portal image and the actual portal image to superimpose and display a plurality of portal images on the display device, and monitoring a portal image deviation of the multi-leaf collimator at the target time, comprises:

and outputting an observed image to a display device according to the planned portal image and the actual portal image so as to alternately display the planned portal image and the actual portal image in a superimposed mode on the display device, and monitoring portal image deviation of the multi-leaf collimator at the target moment.
The portal monitoring method of claim 1, wherein the acquiring the planned portal image set for the multi-leaf collimator at the target time in the preset user treatment plan comprises:

acquiring a planned portal image at a third moment;

and interpolating on a time line of the planned portal image according to the planned portal image at the third moment to determine the planned portal image.
The portal monitoring method of claim 12, wherein prior to the acquiring the planned portal image for the multi-leaf collimator setting at the target time in the preset user treatment plan, the method further comprises: setting a control point for each treatment moment when making the user treatment plan, wherein each control point corresponds to the current frame rotation angle of the electronic portal imaging device;

the obtaining the planned portal image at the third moment includes:

determining a target control point at a third moment;

and according to the target control point at the third moment, the positions of the blades of the multi-blade collimator are sketched, and a planned portal image at the third moment is obtained.
The portal monitoring method of claim 1, wherein the outline of the planned portal image in the observed image is a first color, and the outline of the actual portal image in the observed image is a second color, and the first color and the second color are different.
The method according to claim 14, wherein, in the case that the actual portal image includes a portal image fed back by a motor of the multi-leaf collimator and a portal image captured by the electronic portal image device, a contour line of the portal image fed back by the motor is a third color, and a contour line of the portal image captured by the electronic portal image device is a fourth color.
The portal monitoring method of claim 1, wherein after the outputting of the observation image to a display device according to the planned portal image and the actual portal image, the method further comprises:

acquiring a request of a user to adjust the user treatment plan;

and according to the request, adjusting a planned portal image set for the multi-leaf collimator at a fourth moment in the user treatment plan, wherein the fourth moment is a moment after the target moment.
A method of portal monitoring, the method comprising:

displaying a portal monitoring interface of the multi-leaf collimator;

overlapping and displaying a planned portal image at a target moment and an actual portal image at the target moment on the portal monitoring interface so as to monitor portal image deviation of the multi-leaf collimator at the target moment;

the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator and/or a portal image shot by the electronic portal image device, and the planned portal image is a portal image planned in advance for the multi-leaf collimator in a treatment plan of a user.
A radiotherapy apparatus, characterized in that the radiotherapy apparatus comprises an electronic portal imaging device, the radiotherapy apparatus further comprising:

One or more processors;

a memory; and

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps in the portal monitoring method of claim 1.
A display device, characterized in that the display device comprises:

one or more processors;

a memory; and

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps in the portal monitoring method of claim 17.
A radiation therapy system, comprising a radiation therapy device and a display device, wherein the radiation therapy device is a radiation therapy device according to claim 18, and the display device is a display device according to claim 19, and the radiation therapy device is in communication with the display device.