WO2022140997A1

WO2022140997A1 - Radiation field monitoring method, radiotherapy device, display apparatus and system

Info

Publication number: WO2022140997A1
Application number: PCT/CN2020/140407
Authority: WO
Inventors: 闫浩; 李金升
Original assignee: 西安大医集团股份有限公司
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-07
Also published as: CN116867547A

Abstract

Disclosed are a radiation field monitoring method, a radiotherapy device, a display apparatus and a system. The radiation field monitoring method comprises: acquiring a planned radiation field image, which is provided, at a target moment, for a multi-leaf collimator during a preset user treatment plan; acquiring an actual radiation field image corresponding to the multi-leaf collimator at the target moment; and outputting, according to the planned radiation field image and the actual radiation field image, an observed image to a display apparatus, so as to display, in a stacked manner, a plurality of radiation field images on the display apparatus, and monitoring the radiation field image deviation of the multi-leaf collimator at the target moment. By means of the present application, an operator can conveniently observe treatment dose deviation in real time, thereby increasing the efficacy of treatment.

Description

Field monitoring method, radiotherapy equipment, display device and system

technical field

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

Background technique

With the development of new radiotherapy technology, the accuracy of tumor localization and the precision of radiotherapy are also gradually improved. However, during the entire radiotherapy process, the target volume often deviates from the irradiation field due to the influence of factors such as positioning error, patient breathing motion, and changes in the shape and position of the treatment area. Therefore, the biggest difficulty in radiotherapy at present is how to ensure that the tumor target area receives an accurate radiation dose.

Dose-guided Radiation Therapy (DGRT) as a cutting-edge radiotherapy technology has been widely used at home and abroad. If the deviation of the dose is detected, the radiotherapy plan should be modified in time, so as to ensure that the treatment dose accurately matches the planned dose.

technical problem

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

technical solutions

The present application provides a field monitoring method, radiotherapy equipment, display device and system. By superimposing and displaying the actual planned field image and the actual field image of the blade, the operator can more objectively reflect the motor feedback of the blade at this moment. Check whether there is a deviation between the actual position and the planned position, and monitor the deviation in real time, so that the operator can easily observe the deviation of the treatment dose in real time and improve the treatment efficiency.

In one aspect, the present application provides a method for monitoring a portal, which is applied to a radiotherapy device, the radiotherapy device includes an electronic portal imaging device, and the method includes: acquiring a multi-leaf collimator at a target moment in a preset user treatment plan the set planned field image; obtain the actual field image corresponding to the multi-leaf collimator at the target moment; output the observation image to the display device according to the planned field image and the actual field image, so as to The display device superimposes and displays a plurality of portal images, and monitors the deviation of the portal images of the multi-leaf collimator at the target moment, and the plurality of portal images includes a planned portal image.

On the other hand, the present application also provides a method for monitoring a field, the method comprising: displaying a field monitoring interface of a multi-leaf collimator; superimposing and displaying a planned field image at a target moment and all data on the field monitoring interface. The actual field image at the target moment is used to monitor the field image deviation of the multi-leaf collimator at the target moment; wherein, the actual field image includes the motor feedback of the multi-leaf collimator. and/or, a portal image captured by the electronic portal imaging device, and the planned portal image is a portal image pre-planned for the multi-leaf collimator in the user's treatment plan.

On the other hand, the present application also provides a portal monitoring device, which is applied to radiotherapy equipment. The radiotherapy device includes an electronic portal imaging device, and the portal monitoring device includes: a first acquisition module for acquiring a preset user The planned field image set for the multi-leaf collimator at the target moment in the treatment plan; the second acquisition module is used to acquire the actual field image corresponding to the multi-leaf collimator at the target moment; the output module is used for Output the observation image to the display device according to the planned portal image and the actual portal image, so as to superimpose and display multiple portal images on the display device, and monitor the radiation of the multi-leaf collimator at the target moment. The deviation of the field images, the plurality of field images include the planned field images.

On the other hand, the present application also provides a field monitoring device, the field monitoring device includes: a display module for displaying a field monitoring interface of a multi-leaf collimator; a target is superimposed and displayed on the field monitoring interface The planned portal image at the moment and the actual portal image at the target moment to monitor the deviation of the portal image of the multi-leaf collimator at the target moment; wherein, the actual portal image includes the multi-leaf collimator The field image fed back by the motor of the collimator, and/or the field image captured by the electronic field imaging device, the planned field image is the field pre-planned for the multi-leaf collimator in the user's treatment plan image, the portal image captured by the electronic portal imaging device is the imaging contour formed after the treatment beam emitted by the treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area.

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

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

One or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the steps in the method for monitoring the field on the display device side.

On the other hand, the present application also provides a radiotherapy system, the radiotherapy system includes a radiotherapy device and a display device, the radiotherapy device and the display device are connected in communication, the radiotherapy device is the above radiotherapy device, the radiotherapy device is The display device is the above-mentioned display device.

On the other hand, the present application also provides a computer-readable storage medium on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the method for monitoring a field.

beneficial effect

In the present application, by acquiring the planned field image and the actual field image at the pre-target time, the observed image is output to the display device, so as to display multiple field images in a superimposed manner on the display device, and monitor the multi-leaf collimator on the target. The deviation of the field image at time, because in the process of superimposing the planned field image and the actual field image, the operator can intuitively monitor the deviation of the field image, and display the actual planned field image and the actual field image of the blade by superimposing. , it can more objectively reflect for the operator whether there is a deviation between the real position of the blade motor feedback and the planned position at this moment, and monitor the deviation in real time, so that the operator can easily observe the deviation of the treatment dose in real time and improve the treatment efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic diagram of a scene of a radiation therapy system provided by an embodiment of the present application;

2 is a schematic flowchart of an embodiment of a method for monitoring a field provided by an embodiment of the present application;

3 is a schematic flowchart of an embodiment of step 203 in the embodiment of the present application;

4 is a schematic diagram of an embodiment of superimposing and displaying a planned portal image and an actual portal image in an embodiment of the present application;

FIG. 5 is a schematic flowchart of an embodiment of step 201 in its own embodiment;

6 is a schematic structural diagram of an embodiment of a field monitoring device in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an embodiment of the radiotherapy apparatus in the embodiment of the present application.

Embodiments of the present application

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation shown in the drawings Or the positional relationship is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" 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 present application. In the following description, details are set forth for the purpose of explanation. It is to be understood that one of ordinary skill in the art can realize that the present application may be practiced without the use of these specific details. In other instances, well-known structures and procedures have not been described in detail so as not to obscure the description of the present application with unnecessary detail. Therefore, this 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.

The following first introduces some basic concepts involved in the embodiments of the present application:

Dose-guided radiotherapy: Dose-guided radiotherapy is a cutting-edge radiotherapy technology that monitors the actual dose deviation of the tumor and surrounding normal tissues between or in divided treatments, and corrects the radiotherapy plan in time to ensure that the therapeutic dose matches the planned dose accurately. .

Dose Bias: In general, radiosurgery and radiotherapy treatments consist of several phases. First, an accurate three-dimensional (3D) map of the anatomy in the region of interest (head, body, etc.) is constructed to determine the exact coordinates of the target within the anatomy, ie to locate the target within the body Tumor or abnormality and define its exact shape and size. Second, the motion path for the radiation beam is calculated to deliver a dose distribution that the surgeon considers acceptable, taking into account various medical constraints. During this phase, a team of experts uses special computer software to develop a treatment plan 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 the radiation therapy plan is performed. During this phase, the radiation dose is delivered to the patient according to a prescribed treatment plan 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 multi-leaf collimator (MLC) equipped radiation therapy systems such as linear accelerators (linacs) by delivering prescribed radiation doses (X-rays, gamma rays, electrons, protons) to the pathological anatomy and/or ions) to treat pathological anatomy (tumors, lesions, vascular malformations, neurological disorders, etc.) while minimizing radiation exposure to surrounding tissues and critical anatomical structures.

There are a number of factors that contribute to the discrepancy between the prescribed radiation dose distribution and the actual dose delivered (ie, the actual dose delivered to the target during radiation therapy). One such factor is the uncertainty of the patient's position in the radiation therapy system. Other factors include uncertainty introduced by changes that can occur during the course of a patient's treatment. Such changes may include random errors (such as small differences in patient setting positions). Other sources are attributed 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 movements can be more random and unpredictable, while others can be more regular, movements can overlap with either category. There are many other sources of uncertainty, such as wrong patient, mechanical failure/calibration error/change in radiation output, corrupted data (protocol does not match calculated dose), wrong treatment equipment (eg, in the original treatment In the event that the device is not functioning at the moment, the patient may be treated on another treatment device). These uncertainties can affect the quality of treatment for the patient and the actual radiation dose delivered to the target, resulting in dose bias.

Electronic Portal Imaging System: Also known as Electronic Portal Imaging Device, the full English name is Electronic Portal Imaging Device, or EPID for short. EPID based on amorphous silicon flat panel detector can obtain better imaging with less dose, and has the advantages of small size, high resolution, high sensitivity, and wide influence range, etc., and is a fast two-dimensional dose measurement system. The size, shape, position and patient setup of the field can be verified offline, and the dose in the field can be measured directly.

Embodiments of the present application provide a field monitoring method, radiotherapy equipment, display device, and system, which will be described in detail below.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a scene of a radiotherapy system provided by an embodiment of the present application. The radiotherapy system may include a radiotherapy apparatus 100 and a display device 200. The radiotherapy apparatus 100 and the display apparatus 200 are connected in communication, and the radiotherapy apparatus 100 may To transmit data to the display device, the radiotherapy apparatus 100 is integrated with a portal monitoring device, an electronic portal imaging device, etc. As shown in the radiotherapy apparatus in FIG. 1 , the radiotherapy apparatus 100 can collect medical images or portal images of the human body and output them to the display device 200.

In the embodiment of the present application, the radiotherapy device 100 may be a CT device, a CBCT device, or other medical imaging devices, such as an ultrasound device (such as a B-ultrasound device or a color ultrasound device), a magnetic resonance imaging (Magnetic Resonance Imaging, MRI) device, etc. There are no restrictions.

In the embodiment of the present application, the radiotherapy equipment may also be a kV or MV energy intensity modulated radiotherapy (IMRT) equipment. The radiation therapy device is delivered with a multi-leaf collimator (MLC), which may be a computer-controlled mechanical beam shaping device attached to the head (treatment head) of the linac and including metal fingers ) or components of the blade. The MLC may for example be made of 120 movable blades with blade widths of 0.5 and/or 1.0 cm. An optimized intensity profile is achieved by sequentially delivering shape and weight optimized various subfields for each beam direction. From one subfield to the next, the vanes can move when the radiation beam is on (i.e. dynamic multi-leaf collimation (DMLC)) or when the radiation beam movement is off (i.e. segmented multi-leaf collimation (SMLC)) .

In this embodiment of the present application, the display apparatus 200 may be a device including receiving and transmitting hardware, that is, a device having receiving and transmitting hardware capable of performing two-way communication on a two-way communication link. Such devices may include cellular or other communication devices with a single-line display or a multi-line display or a cellular or other communication device without a multi-line display. The specific display device 200 may be a desktop terminal or a mobile terminal, and the display device 200 may also be a display screen, or one of devices with a display screen such as a mobile phone, a tablet computer, and a notebook computer.

Those skilled in the art can understand that the application environment shown in FIG. 1 is only one application scenario of the solution of the present application, and does not constitute a limitation to the application scenario of the solution of the present application. Other application environments may also include more than those shown in FIG. More or less display devices are shown, or the network connection relationship of radiotherapy equipment. For example, only one display device is shown in FIG. 1. It is understood that the radiotherapy system may also include one or more other display devices. Specifically, this There are no restrictions.

In addition, as shown in FIG. 1 , the radiotherapy system may further include a memory 300 for storing data, such as medical image data, for example, medical image data collected by the radiotherapy apparatus 100 .

It should be noted that the schematic diagram of the scene of the radiotherapy system shown in FIG. 1 is only an example, and the radiotherapy system and the scene described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute any For the limitations of the technical solutions provided in the embodiments of the present application, those of ordinary skill in the art know that with the evolution of radiotherapy systems and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

First, an embodiment of the present application provides a field monitoring method, including: acquiring a planned field image set for a multi-leaf collimator at a target time in a preset user treatment plan; acquiring the multi-leaf collimator at the target time The actual field image corresponding to the straightening device; output the observation image to the display device according to the planned field image and the actual field image, so as to superimpose and display multiple field images on the display device, and monitor the multi-leaf collimator. The deviation of the portal image of the straightener at the target moment, the plurality of portal images include the planned portal image.

As shown in FIG. 2, it is a schematic flowchart of an embodiment of a field monitoring method in an embodiment of the present application. The field monitoring method includes the following steps 201-203:

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

Before radiotherapy is performed on the user, a treatment plan will be set for the user in advance. The user's treatment plan can be formulated through a treatment planning system (TPS), and the user's treatment plan includes the plan set for the multi-leaf collimator at each moment. Field image.

202. Acquire an actual field image corresponding to the multi-leaf collimator at the target moment.

Wherein, 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 captured by the electronic portal imaging device. The planned portal image is the portal image pre-planned by the multi-leaf collimator in the user's treatment plan, and the portal image captured by the electronic portal imaging device is the treatment beam emitted by the treatment head of the radiotherapy equipment passing through Imaging contour formed after multi-leaf collimator and target volume.

203. Output an observation image to a display device according to the planned portal image and the actual portal image, so as to superimpose and display multiple portal images on the display device, and monitor the multi-leaf collimator at the target time The deviation of the portal images, the plurality of portal images include the planned portal images.

Wherein, the plurality of portal images include planned portal images.

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, it is possible to determine the deviation of the portal image. The dose deviation is directly estimated, so it is not described in detail in the subsequent process. In addition, the portal image described in the embodiments of the present application only refers to the portal image or the image corresponding to the portal area, and does not include the corresponding background area.

Since the accuracy of the predicted radiation dose delivered to the target volume based on a predetermined treatment plan plays an important role in the ultimate success or failure of radiation therapy, inaccurate dose delivery may result in insufficient radiation to cure or damage nearby healthy tissue and Excessive Radiation of Organs at Risk (OAR). Radiation doses that are too high can cause severe damage to healthy tissue surrounding the tumor as well as adjacent organs, while doses that are too low can jeopardize the possibility of a cure.

Therefore, in this embodiment, the planned field image and the actual field image at the pre-target time are acquired, and the observation image is output to the display device, so as to display multiple field images in a superimposed manner on the display device, and monitor the multi-leaf collimator in The deviation of the field image at the target moment is due to the fact that in the process of superimposing and displaying the planned field image and the actual field image, the operator can monitor the deviation of the field image visually, and display the actual planned field image and the actual field image of the blade by superimposing. The field image can more objectively reflect for the operator whether there is a deviation between the real position of the blade motor feedback and the planned position at this moment, monitor the deviation in real time, and then determine the dose deviation from the field deviation, so as to make the operator more convenient. Real-time observation of treatment dose deviation to improve treatment efficiency.

Wherein, in step 201, the observation image is output to the display device according to the planned portal image and the actual portal image, so as to display multiple portal images in a superimposed manner on the display device, and monitor the deviation of the portal image of the multi-leaf collimator at the target time. There are various implementation methods, which are further divided into two aspects according to the source of the field image. The following examples are used to illustrate:

(1) Only the planned portal image and the motor feedback portal image are acquired

At this time, multiple portal images are superimposed and displayed on the display device, and the multiple portal images may include the planned portal image and the portal image fed back by the motor. The obtaining of the actual field image corresponding to the multi-leaf collimator at the target time in the above step 202 includes: obtaining the field image fed back by the motor corresponding to the multi-leaf collimator at the target time, the motor feedback The portal image of is the portal image of the motor feedback of the multi-leaf collimator.

In the embodiment of the present application, the MLC blade itself has motor feedback, so the actual position of the blade movement can be obtained, and the field image fed back by the motor is at the blade angle and the position reached by the blade self-measurement.

At this time, the observation image can be output to the display device according to the planned field image and the field image fed back by the motor, so as to superimpose and display multiple field images on the display device to monitor the multi-leaf collimator at the target time. There is only one way to display the field image deviation, that is, a single display window superimposes the planned field image and the motor feedback field image.

Specifically, the observation image is output to the display device according to the planned portal image and the actual portal image, so as to display multiple portal images in a superimposed manner on the display device, and monitor the portal image of the multi-leaf collimator at the target time. The deviation includes: outputting an observation image to a display device according to the planned portal image and the motor-feedback portal image, so as to superimpose and display the planned portal image and the motor-feedback portal image on the display device, and monitor the multi-leaf collimation The deviation of the field image of the transmitter at the target moment.

(2) Collect and acquire the planned portal image and the portal image captured by the electronic portal imaging device

In this case, the actual portal image includes a portal image captured by an electronic portal imaging device;

the outputting the observation image to the display device according to the planned portal image and the actual portal image, so as to superimpose and display a plurality of portal images on the display device, and monitor the multi-leaf collimator at the target time The deviation of the portal image includes: 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 superimpose and display the planned portal image and the electron beam on the display device. A field image captured by a field imaging device is used to monitor the field image deviation of the multi-leaf collimator at the target moment.

(3) Collect and acquire the planned portal image, the portal image fed back by the motor, and the portal image captured by the electronic portal imaging device

At this time, the embodiment of the present application further collects the portal image captured by the electronic portal imaging device at the target moment on the basis of collecting the portal image fed back by the motor, that is, the portal monitoring method at this time It also further includes: acquiring a portal image captured by an electronic portal imaging device corresponding to the multi-leaf collimator at the target moment.

Correspondingly, outputting an observation image to a display device according to the planned portal image and the portal image captured by the electronic portal imaging device, so as to superimpose and display multiple portal images on the display device, and monitor the multiple portal images. The deviation of the portal image of the leaf collimator at the target moment includes: outputting an observation image 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 to a display device, so as to superimpose and display a plurality of portal images on the display device, and monitor the deviation of the portal images of the multi-leaf collimator at the target moment.

Since three types of field images are collected, there are many ways to realize the superimposed display of the field images. The specific implementation can be selected according to the actual application scenario. The following examples illustrate:

1) Simultaneously superimpose and display three field images

At this time, 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, the observed image is output to the display device for superimposed display on the display device. Multiple portal images, monitoring the deviation of the portal images of the multi-leaf collimator at the target moment, including: according to the planned portal images, the portal images captured by the electronic portal imaging device, and the motor feedback The projected field image outputs the observation image to the display device, so that the planned field image, the field image captured by the electronic field imaging device, and the field image fed back by the motor are superimposed and displayed on the display device. The field image deviation of the multi-leaf collimator at the target moment. That is, the planned portal image, the portal image captured by the electronic portal imaging device, and the portal image fed back by the motor are superimposed together at the same time.

As in the established portal monitoring method, if the measured radiation is different from the expected radiation after the portal monitoring, the treatment may be stopped. However, in fact, in some instances, the radiation field is intentionally made larger than the target volume. For example, in arc therapy treatments, tangential fields are more likely to occur because all radiation directions in the plane are used. Therefore, when all points irradiated by the beam are used for real-time evaluation of treatment, established dose evaluation methods may falsely detect dose errors and trigger cessation of radiotherapy. Therefore, the separate comparison of the two portal images may lead to some comparison errors. In this embodiment, the deviation of the portal images of the multi-leaf collimator at the target moment is monitored by the superimposed display of the three portal images, which can The comparison based on multi-dimensional dimensions further verifies the accuracy of the deviation, avoids the error caused by the separate comparison of the two field images with other interference factors, and improves the judgment accuracy of the field monitoring.

2) Three field images are collected, and some images are actually selectively superimposed

In practical applications, due to the limited size of the EPID, it is difficult to meet the requirements of large field imaging, and the edge of the blade in the field image captured by the electronic field imaging device formed by MLC cannot be displayed on the EPID, that is, the electronic field image. When the field image captured by the device (ie, the field image captured by the EPID) is larger than the maximum field range (size) of the EPID, the blade edge cannot be displayed on the EPID.

In order to improve the defects in this situation, in some embodiments of the present application, as shown in FIG. 3 , the observation image is output to the display device according to the planned portal image and the actual portal image, so as to display the image on the display device. The device superimposes and displays multiple field images, and monitors the field image deviation of the multi-leaf collimator at the target moment, including the following steps 301-302:

301. Determine whether the portal image captured by the electronic portal imaging device exceeds the maximum portal range of the electronic portal imaging device.

If the portal image captured by the electronic portal imaging device has an area that exceeds the maximum portal range, step 302 is executed, and if the portal image captured by the electronic portal imaging device does not have an area that exceeds the maximum portal range area, go to step 303.

302. Output an observation image to a display device according to the planned field image and the motor-feedback field image, so as to superimpose and display the planned field image and the motor-feedback field image on the display device, and monitor The deviation of the field image of the multi-leaf collimator at the target moment.

If the portal image captured by the electronic portal imaging device has an area that exceeds the maximum range of the portal, it means that the blade edge of the portal image captured by the electronic portal imaging device cannot be displayed on the EPID. Superimpose and display the portal image captured by the electronic portal imaging device to avoid the situation that cannot be displayed, and output the observation image to the display device only according to the planned portal image and the portal image fed back by the motor, so as to be superimposed on the display device The planned portal image and the motor feedback portal image are displayed.

Further, in some embodiments of the present application, the observation image is outputted to a display device according to the planned portal image and the actual portal image, so as to display multiple portal images in a superimposed manner on the display device to monitor all the images. The deviation of the field image of the multi-leaf collimator at the target moment further includes the following step 303:

303. Output an observation image to a display device according to the planned portal image and the portal image captured by the electronic portal imaging device, so as to superimpose and display the planned portal image and the portal image captured by the electronic portal imaging device on the display device. The field image is monitored, and the deviation of the field image of the multi-leaf collimator at the target moment is monitored.

At this time, if the portal image captured by the electronic portal imaging device does not have an area that exceeds the maximum range of the portal, it means that the blade edge of the portal image captured by the electronic portal imaging device can be displayed on the EPID. At this time, the portal image captured by the electronic portal imaging device can be superimposed and displayed. Therefore, the planned portal image and the portal image captured by the electronic portal imaging device can be superimposed and displayed on the display device at this time. The deviation of the portal image of the multi-leaf collimator at the target moment, specifically, the planned portal image and the portal image captured by the electronic portal imaging device are superimposed and displayed as shown in FIG. 4 .

By superimposing and displaying the field image captured by the electronic field imaging device and the planned field image, the operator can more objectively reflect whether there is a deviation between the actual position and the planned position of the blade at this moment, and monitor the deviation in real time, so as to make It is convenient for the operator to observe the deviation of the treatment dose in real time.

It should be noted that multiple portal images must be synchronized in time. Exemplarily, the relevant data of the portal image (planned portal image) formed by the MLC is sent by the TPS at a frequency of 3 times/S, and is displayed in the form of animation at a frequency of 5 Frame/S after interpolation, and the EPID is displayed at a frequency of 5 Frames/S. The frequency of /S is displayed in real time to extract the contour shape of the target area, and it is displayed in the form of an image (the portal image captured by the electronic portal imaging device). The wild images are synchronized in time.

Therefore, when the actual field image includes the field image fed back by the motor of the multi-leaf collimator, the acquiring the actual field image corresponding to the multi-leaf collimator at the target moment may include: acquiring the first field image. The field image fed back by the motor at a moment; according to the field image fed back by the motor at the first moment, interpolation is performed on the time line of the field image fed back by the motor to determine the field fed back by the motor at the target time image.

Further, the acquiring the field image of the motor feedback at the first moment includes: acquiring the motor feedback position of each blade of the multi-leaf collimator at the first moment, and the motor feedback position of each blade may include blade self-test. The position reached and/or the position reached by the blade measured by the position feedback system, where the blade self-measured arrival position is the position determined by the motor motor angle, and the position reached by the blade measured by the position feedback system represents the actual movement position of the blade , compared with the position reached by the blade self-measurement, the position of the blade reached by the position feedback system is more accurate; according to the motor feedback position of each blade of the multi-leaf collimator, each blade of the multi-leaf collimator is determined. According to the actual position of each blade of the multi-leaf collimator, delineate the blade position of the multi-leaf collimator, and obtain the field 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 the second time instant image. A portal image captured by the electronic portal imaging device; according to the actual portal image at the second moment, interpolation is performed on the timeline of the actual portal image to determine the portal image captured by the electronic portal imaging device.

Further, the acquiring the portal image captured by the electronic portal imaging device at the second moment includes: at the second moment, the treatment beam emitted by the treatment head of the radiotherapy apparatus passes through the multi-leaf collimator and the target. When the area is in the target area, the imaging pattern after the treatment beam passes through the multi-leaf collimator and the target area is acquired by the electronic portal imaging device; the outline of the imaging pattern is determined as the multi-leaf collimator at the second moment. the actual field image.

In a specific implementation manner 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 multi-leaf collimator corresponds to the acquisition time of the target. The actual field image of , may further include the following steps 501-503:

501. At the second moment, when the treatment beam emitted by the treatment head of the radiotherapy apparatus passes through the multi-leaf collimator and the target area, obtain through the electronic portal imaging device that the treatment beam passes through the multi-leaf collimation The imaging pattern after the detector and the target area.

It should be noted that the target area described in the embodiments of the present application may be a certain tissue or organ of the human body, such as the skull, or organs such as the lungs and the liver.

502. Determine the contour of the imaging pattern as the portal image captured by the electronic portal imaging device of the multi-leaf collimator at the second moment.

503. Perform interpolation on the time line of the portal image captured by the electronic portal imaging device according to the portal image captured by the electronic portal imaging device at the second moment, to determine the portal captured by the electronic portal imaging device image.

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

In a specific embodiment, the display device includes a first display window, and the plurality of portal images include the planned portal image and the motor feedback portal image; the planned portal image and the electronic The portal image captured by the portal imaging device is superimposed and displayed on the first display window of the display device.

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 captured by the electronic portal imaging device; The field image and the actual field image are outputted to the display device, so as to superimpose and display a plurality of field images on the display device, and monitor the field image deviation of the multi-leaf collimator at the target moment, Including: outputting an observation image to a display device according to the planned portal image and the actual portal image, so as to superimpose and display the planned portal image and the target portal image on the first display window of the display device, The second display window of the display device superimposes and displays the planned portal image, the portal image captured by the electronic portal imaging device, and the portal image fed back by the motor;

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

Further, the first display window and the second display window are different, the first display window and the second display window can be side-by-side or side-by-side, and the size of the first display window and the second display window can be the same or different. Set according to the actual application scenario. For example, the layout of the first display window and the second display window on the display interface of the display device may be that the upper and lower sides bisect the display interface, or the left and right side bisect the display interface. It can be understood that, in practical applications, it can also be The first display window and the second display window are arranged on the display interface according to a preset area ratio, for example, the area ratio of the first display window and the second display window is 2:1, etc., which can be set as required, which is not limited here.

In addition, it should be noted that in the above-mentioned embodiments, only two display windows are displayed on the field monitoring interface of the display device. It is understood that in practical applications, multiple display windows can be displayed. The first display window described in , the second display window, and the third display window are also displayed, which are not specifically limited here.

In some embodiments of the present application, in addition to being superimposed and displayed on the display device, the multiple portal images can also be displayed alternately at the same time. Taking the planned portal image and the actual portal image as an example, in this case, according to the The planned portal image and the actual portal image output the observed image to the display device, so as to display multiple portal images superimposed on the display device, and monitor the deviation of the portal image 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 portal image captured by the electronic portal imaging device, so as to alternately display the planned portal image and the electronic portal image on the display device. The field image captured by the field imaging device is used to monitor the field image deviation of the multi-leaf collimator at the target moment.

Specifically, the planned portal image and the portal image captured by the electronic portal imaging device are alternately displayed on the display device, indicating that the planned portal image and the portal image captured by the electronic portal imaging device are superimposed and displayed, However, they are alternately displayed at the top at preset time intervals. For example, at time point 1, the planned portal image is superimposed and displayed on the portal image captured by the electronic portal imaging device, and at time 2, the portal image captured by the electronic portal imaging device is displayed. Overlaid on top of the planned portal image.

The observation image can also be a dynamic image synthesized by the planned portal image and the portal image captured by the electronic portal imaging device, and each frame of the image included in the dynamic image is the superposition of the planned portal image and the portal image captured by the electronic portal imaging device. For the post-synthesized images, take the planned portal image as image 1 and the portal image captured by the electronic portal imaging device as the image, and the dynamic image is composed of three frames of images (image 12, image 21, and image 12). 12 is a composite image of image 1 superimposed on image 2, and image 21 is a composite image of image 2 superimposed on image 1.

For example, the observation image can be an existing dynamic image format, such as a GIF image, or it can be a new dynamic image format in the future. It only needs to be a dynamic image here, and there is no specific limitation.

The time interval between different frame images in the dynamic image can be set preferentially. In one embodiment, a "time setting" button can be set on the field monitoring interface of the display device. For example, it can be set to adjust the transparency of medical images. After the slider bar, when the "time setting" button is triggered, a drop-down list is displayed, and the drop-down list shows multiple options for the time interval that can be selected 0.25 seconds, 0.5 seconds or 1 second, etc. For example, the operator selects the interval time After that, the dynamic image under the image output interval will be displayed in the field monitoring interface. In another way, you can set the "time setting" check box in the field monitoring The dynamic image can be displayed in the field monitoring interface. The image output time interval can be the default value, or can be set through the "Switching Time" adjustment progress bar, the "Switching Time Setting" button, etc. It should be noted that, in the embodiment of the present application, the interface display manner for setting the image output time interval can be various, and is not limited.

Further, in order to distinguish different field images when superimposing different field images, different color lines can be used to display different field images. Specifically, in some embodiments of the present application, the outline corresponding to the planned field image in the observation image is a first color, and the outline of the actual field image in the observation image is a second color, The first color and the second color are different. Further, when the actual field image includes the field image fed back by the motor of the multi-leaf collimator and the field image captured by the electronic field imaging device, the size of the field image fed back by the motor is The contour line is the third color, the contour line of the portal image captured by the electronic portal imaging device is the fourth color, the first color, the third color and the fourth color are different, and so on.

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

In the present application, in order to facilitate the acquisition of the planned portal image, before the acquisition of the planned portal image set for the multi-leaf collimator at the target moment in the preset user treatment plan, the method may further include: During the user's treatment plan, a control point is set for each treatment moment, and each control point corresponds to the current gantry rotation angle of the electronic portal imaging device;

At this time, acquiring the planned portal image set for the multi-leaf collimator at the target time in the preset user treatment plan in the above step 201 includes: acquiring the planned portal image at the third time; according to the third time The planned portal image is interpolated on the time line of the planned portal image to determine the planned portal image.

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

At this time, the acquiring the planned field image at the third moment includes: determining the target control point at the third moment; delineating the blade position of the multi-leaf collimator according to the target control point at the third moment, and obtaining The planned field image at the third moment.

It should be noted that, in some embodiments of the present application, the first moment may be the moment when the time line of the field image fed back by the motor is closest to the target moment, and the second moment may be the moment in the actual field The time line of the image is the closest time to the target time, and the third time may be the time that the time line of the actual field image is closest to the target time. In other embodiments of the present application, the target moment may also be one of the first moment, the second moment, or the third moment. Taking the target time as the third time as an example, the first time can be the time when the field image fed back by the motor is actually collected when the field image fed back by the motor is collected at the target time; For the portal image captured by the portal imaging device, the actual acquisition time of the portal image captured by the electronic portal imaging device, for example, the target time is 5s, and the portal image fed back by the motor at 5s needs to be collected. factor, the actual first moment of collecting the field image fed back by the motor is 5.3s.

In addition, in other embodiments of the present application, since the planned portal image is predetermined, the planned portal image can be used as a reference, for example, the time of the planned portal image is the target time, and at this time there is no need for the planned portal image. The images are interpolated. It is assumed that the portal image captured by the electronic portal imaging device is at the 5.3 second (second time), the portal image fed back by the motor is at the 5.1 second (the first time), and the planned portal image is at the fifth Second (target time), the target time is 5s, and at 5s, the field image of the motor feedback and the field image captured by the electronic field imaging device are collected, and the actual acquisition time is 5.1s and 5.3s respectively. After interpolation is performed on the respective timelines of the field image and the field image captured by the electronic portal imaging device, the portal image fed back by the motor and the portal image captured by the electronic portal imaging device at the time of 5s can be determined.

In the embodiment of the present application, after the observation image is output to the display device according to the planned portal image and the portal image captured by the electronic portal imaging device, the planned portal image and the portal captured by the electronic portal imaging device can be determined. The field deviation of the superimposed images, therefore, according to the deviation existing after superposition, the next treatment plan is adjusted to compensate for the field deviation. Therefore, further, in the said according to said planned portal image and said electronic portal image After the portal image captured by the device outputs the observation image to the display device, the method may further include: acquiring a request from the user to adjust the user's treatment plan; For the planned field image set by the leaf collimator, the fourth time is the time after the target time.

For example, under an extreme condition, assuming that the MLC movement of the radiotherapy equipment is slow at each gantry rotation angle, and the upper computer does not detect the time delay, at this time, the planned portal image displayed by superimposing and the electronic The field image captured by the field imaging device (it is an independent third-party angle monitoring) can detect this problem and check and repair the MLC blade motor in time.

Further, according to the request, adjusting the planned portal image set for the multi-leaf collimator at the fourth moment in the user's treatment plan includes: according to the request, calculating the planned portal image and all the planned portal images. The actual deviation of the actual portal image is adjusted; based on the actual deviation, the planned portal image set for the multi-leaf collimator at the fourth moment in the user's treatment plan is adjusted.

In some embodiments of the present application, the target observation images in each adjustment process in the field monitoring can also be saved, so that each dose adjustment verification has evidence saved, which is convenient for subsequent medical disputes or other needs to retrospect the field images. used in the scene.

Specifically, in some embodiments of the present application, the field monitoring method may further include: collecting time information of the current request after obtaining a request from the user to adjust the user's treatment plan each time; saving the corresponding time information The target observation images are formed to form sets of target observation images at different times. That is, each time the field monitoring is adjusted, the target observation image of the current field monitoring is saved, forming a target observation image set on the time axis, which is convenient for subsequent retrospective viewing of the field monitoring records.

Further, the field monitoring method may further include the step of backtracking. Specifically, the field monitoring method may further include: acquiring a field monitoring history backtracking instruction for the user, where the field monitoring history backtracking instruction includes a backtracking time. information; acquiring the retrospective target observation image corresponding to the retrospective time information in the target observation image set; outputting the retrospective target observation image to the display device for display. Specifically, on the field monitoring interface of the display device, a backtracking control can be displayed. After the user clicks the backtracking control, a backtracking time input box or selection box can be displayed to determine the backtracking time. After the user determines the backtracking time, the field monitoring history is generated. The backtracking instruction, based on the backtracking time information, can obtain backtracking target observation images in the target observation image set saved in the above embodiment.

In addition, the present application also provides a field monitoring method, which is applied to a display device, and the method includes: displaying a field monitoring interface of a multi-leaf collimator; superimposing and displaying a target on the field monitoring interface The planned portal image at the moment and the actual portal image at the target moment to monitor the deviation of the portal image of the multi-leaf collimator at the target moment; wherein, the actual portal image includes the multi-leaf collimator The field image fed back by the motor of the collimator, and/or the field image captured by the electronic field imaging device, the planned field image is the field pre-planned for the multi-leaf collimator in the user's treatment plan image, the portal image captured by the electronic portal imaging device is the imaging contour formed after the treatment beam emitted by the treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area.

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 the portal monitoring interface includes a first display window; the monitoring on the portal The interface superimposes and displays the planned field image at the target moment and the actual field image at the target moment, so as to monitor the deviation of the field image of the multi-leaf collimator at the target moment, including: in the first display window The planned field image at the target time and the field image fed back by the motor at the target time are superimposed and displayed, so as to monitor the deviation of the field image of the multi-leaf collimator at the target time.

Further, the actual portal image further includes a portal image captured by the electronic portal imaging device, and the portal monitoring interface further includes a second display window; in this case, the method further includes:

The planned field image at the target time and the field image captured by the electronic portal imaging device at the target time are superimposed and displayed on the second display window, so as to monitor the field of the multi-leaf collimator at the target time Image bias.

For the specific implementation of the above operations, reference may be made to the foregoing embodiments, and details are not described herein again.

In order to better implement the portal monitoring method in the embodiments of the present application, on the basis of the portal monitoring method, the embodiments of the present application further provide a portal monitoring device, which is applied to radiotherapy equipment, and the radiotherapy equipment includes an electronic portal The imaging device, as shown in FIG. 6 , the field monitoring device 600 includes:

The first acquisition module 601 is used to acquire the planned field image set for the multi-leaf collimator at the target moment in the preset user treatment plan;

A second acquisition module 602, configured to acquire the actual field image corresponding to the multi-leaf collimator at the target moment;

The output module 603 is configured to output an observation image to a display device according to the planned portal image and the actual portal image, so as to superimpose and display multiple portal images on the display device, and monitor the multi-leaf collimator in The deviation of the portal images at the target moment, and the plurality of portal images includes the planned portal images.

In this embodiment, the first acquisition module 601 and the second acquisition module 602 acquire the planned field image and the actual field image at the pre-target time, and the output module 603 outputs the observed image to the display device, so as to superimpose and display multiple shots on the display device. field image, and monitor the field image deviation of the multi-leaf collimator at the target moment. Since the operator can visually monitor the field image deviation during the superimposed display process of the planned field image and the actual field image, By superimposing and displaying the actual planned field image and the actual field image of the blade, it is possible to more objectively reflect for the operator whether there is a deviation between the actual position of the blade and the planned position at this moment, and monitor the deviation in real time, so as to make the operator more convenient. Real-time observation of treatment dose deviation to improve treatment efficiency.

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 present application, the actual portal image includes a portal image fed back by a motor of a multi-leaf collimator;

The output module 603 is specifically used for:

Output the observation image to a display device according to the planned portal image and the motor-feedback portal image, so as to superimpose and display the planned portal image and the motor-feedback portal image on the display device, and monitor the The field 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:

Obtain the portal image of the motor feedback at the first moment;

According to the portal image fed back by the motor at the first moment, interpolation is performed on the time line of the portal image fed back by the motor to determine the portal image fed back by the motor at the target moment.

Obtaining the motor feedback position of each blade of the multi-leaf collimator at the first moment, the motor feedback position of each blade includes the position reached by the blade self-measurement and/or the position reached by the blade measured by the position feedback system;

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

According to the actual position of each blade of the multi-leaf collimator, the position of the multi-leaf collimator blade is delineated, and the field image fed back by the motor at the first moment is obtained.

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 used for:

The observation image is output 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 captured by the electronic portal imaging device in a superimposed manner on the display device. , monitoring the field image deviation of the multi-leaf collimator at the target moment.

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

According to the actual portal image at the second moment, interpolation is performed on the time line of the actual portal image to determine the portal image captured by the electronic portal imaging device.

When the treatment beam emitted by the treatment head of the radiotherapy apparatus passes through the multi-leaf collimator and the target area at the second moment, the electronic portal imaging device captures the treatment beam passing through the multi-leaf collimator and the target area. Imaging pattern behind the target area;

The contour of the imaging pattern is determined as the actual field image of the multi-leaf collimator at the 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 used for:

If the portal image captured by the electronic portal imaging device has an area that exceeds the maximum portal range, output the observation image to the display device according to the planned portal image and the portal image fed back by the motor, so as to be displayed on the display device. The display device superimposes and displays the planned field image and the field image fed back by the motor, and monitors 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 further used for:

If the portal image captured by the electronic portal imaging device does not have an area that exceeds the maximum range of the portal, the observation image is output to the following range according to the planned portal image and the portal image captured by the electronic portal imaging device. A display device is used to superimpose and display the planned portal image and the portal image captured by the electronic portal imaging device on the display device to monitor the deviation of the portal image of the multi-leaf collimator at the target moment.

The output module 603 is also specifically used for:

The observed image is output to the display device according to the planned portal image and the actual portal image, so that the planned portal image and the target portal image are superimposed and displayed on the first display window of the display device. The second display window of the device superimposes and displays the planned portal image, the portal image captured by the electronic portal imaging device, and the portal image fed back by the motor;

In some embodiments of the present application, the output module 603 is specifically used for:

Output the observation image to the 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 on the display device, and monitor the multi-leaf collimator. The deviation of the field image at the target moment.

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

Obtain the planned field image at the third moment;

According to the planned portal image at the third moment, interpolation is performed on the time line of the planned portal image to determine the planned portal image.

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

Before acquiring the planned field image set for the multi-leaf collimator at the target moment in the preset user treatment plan, when formulating the user treatment plan, a control point is set for each treatment moment, and each control point corresponding to the current gantry rotation angle of the electronic portal imaging device;

The first obtaining module 601 is specifically used for:

Determine the target control point at the third moment;

According to the target control point at the third moment, the blade position of the multi-leaf collimator is delineated to obtain the planned field image at the third moment.

In some embodiments of the present application, the outline corresponding to the planned field image in the observation image is a first color, the outline of the actual field image in the observation image is a second color, and the first color The first color is different from the second color.

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 imaging device, the motor feedback The contour line of the portal image of the device is the third color, and the contour line of the portal image captured by the electronic portal imaging device is the fourth color.

In some embodiments of the present application, the device further includes an adjustment module, and the adjustment module is specifically configured to:

After outputting the observation image to the display device according to the planned portal image and the actual portal image, acquiring a request from the user to adjust the user's treatment plan;

According to the request, adjust the planned field image set for the multi-leaf collimator at a fourth time in the user's treatment plan, where the fourth time is a time after the target time.

In some embodiments of the present application, the adjustment module is specifically used for:

According to the request, calculate the actual deviation between the planned portal image and the actual portal image;

The planned portal image set for the multi-leaf collimator at the fourth moment in the user's treatment plan is adjusted based on the actual deviation.

Correspondingly, the present application also provides a field monitoring device, which is applied to a display device, and the field monitoring device includes:

A display module, used for displaying the field monitoring interface of the multi-leaf collimator; the planned field image at the target moment and the actual field image at the target moment are superimposed and displayed on the field monitoring interface to monitor the multi-leaf collimator the field image deviation of the collimator at the target moment;

Wherein, 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, and the planned portal image is for user treatment The plan is the pre-planned portal image of the multi-leaf collimator, and the portal image captured by the electronic portal imaging device is formed after the treatment beam emitted by the treatment head of the radiotherapy equipment passes through the multi-leaf collimator and the target area. Imaging contours.

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 the portal monitoring interface includes a first display window;

The display module is specifically used for:

The planned field image at the target moment and the field image fed back by the motor at the target moment are superimposed and displayed on the first display window, so as to monitor the field image deviation of the multi-leaf collimator at the target moment.

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

The display module is also specifically used for:

The planned portal image at the target moment and the portal image captured by the electronic portal imaging device at the target moment are superimposed and displayed on the second display window, so as to monitor the multi-leaf collimator at the target moment. Portal image bias.

The embodiment of the present application further provides a radiotherapy device, which integrates any of the portal monitoring devices provided in the embodiments of the present application, the radiotherapy device includes an electronic portal imaging device, and the radiotherapy device further includes:

one or more processors;

memory;

and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to execute any one of the above embodiments of the radiation field monitoring method on the side of the radiotherapy device The steps in the method for monitoring the field described in .

The present application also provides a display device, the display device comprising:

one or more processors;

memory; and

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

In addition, the present application also provides a radiotherapy system, the radiotherapy system includes a radiotherapy device and a display device, the radiotherapy device and the display device are connected in communication, and the radiotherapy device is the radiotherapy described in any one of the above embodiments. equipment, the display device is the display device described in any one of the above embodiments.

The embodiments of the present application further provide a radiotherapy apparatus, which integrates any of the portal monitoring devices provided by the embodiments of the present application. As shown in FIG. 7 , it shows a schematic structural diagram of the radiotherapy equipment involved in the embodiment of the present application, specifically:

The radiotherapy apparatus may include a processor 701 of one or more processing cores, a memory 702 of one or more computer-readable storage media, a power supply 703 and an input unit 704 and other components. Those skilled in the art can understand that the structure of the radiotherapy apparatus shown in FIG. 7 does not constitute a limitation on the radiotherapy apparatus, and may include more or less components than those shown in the figure, or combine some components, or arrange different components. in:

The processor 701 is the control center of the radiotherapy equipment, using various interfaces and lines to connect various parts of the entire radiotherapy equipment, by running or executing the software programs and/or modules stored in the memory 702, and calling the stored in the memory 702. Data, perform various functions of radiotherapy equipment and process data, so as to conduct overall monitoring of radiotherapy equipment. Optionally, the 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 mainly processes the operating system, user interface, and application programs, etc. , the modem processor mainly deals with wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may also not be integrated into the processor 701 .

The memory 702 can be used to store software programs and modules, and the processor 701 executes various functional applications and data processing by running 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 required for at least one function (such as a sound playback function, an image playback function, etc.); Data created by the use of radiotherapy equipment, etc. Additionally, 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, memory 702 may also include a memory controller to provide processor 701 access to memory 702 .

The radiotherapy equipment also includes a power supply 703 for supplying power to each component. Preferably, the power supply 703 can be logically connected to the processor 701 through a power management system, so that functions such as charging, discharging, and power consumption management are implemented through the power management system. Power supply 703 may also include one or more DC or AC power sources, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and any other components.

The radiotherapy apparatus may also include an input unit 704, which may be used to receive input numerical or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

Although not shown, the radiotherapy apparatus may also include a display unit, etc., which will not be described here. Specifically, in this embodiment, the processor 701 in the radiotherapy apparatus loads the 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 them and stores them in the memory 702 . The application program in the memory 702, thereby realizing various functions, as follows:

Obtain the planned field image set for the multi-leaf collimator at the target moment in the preset user treatment plan;

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

Output the observation image to the display device according to the planned portal image and the actual portal image, so as to superimpose and display multiple portal images on the display device, and monitor the radiation of the multi-leaf collimator at the target moment. The deviation of the field images, the plurality of field images include the planned field images.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or completed by instructions that control relevant hardware, and the instructions can be stored in a computer-readable storage medium, and loaded and executed by the processor.

To this end, an embodiment of the present application provides a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc. . A computer program is stored thereon, and the computer program is loaded by the processor to execute the steps in any of the methods for monitoring a field provided by the embodiments of the present application. For example, the computer program being loaded by the processor may perform the following steps:

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the above detailed description of other embodiments, and details are not repeated here.

During specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of the above units or structures, reference may be made to the foregoing method embodiments. No longer.

A field monitoring method, radiotherapy equipment, display device and system provided by the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described with specific examples in this article. It is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation and application scope. The contents of the description should not be construed as limiting the application.

Claims

A method for monitoring a portal, characterized in that it is applied to radiotherapy equipment, wherein the radiotherapy device includes an electronic portal imaging device, and the method includes:

Obtain the planned field image set for the multi-leaf collimator at the target moment in the preset user treatment plan;

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

Output the observation image to the display device according to the planned portal image and the actual portal image, so as to superimpose and display multiple portal images on the display device, and monitor the radiation of the multi-leaf collimator at the target moment. The deviation of the field images, the plurality of field images include the planned field images.
The method for monitoring a portal according to claim 1, wherein the actual portal image comprises a portal image fed back by a motor of the multi-leaf collimator, and/or is captured by the electronic portal imaging device field image.
The portal monitoring method according to claim 2, wherein the actual portal image comprises a portal image fed back by a motor of a multi-leaf collimator;

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

Output the observation image to a display device according to the planned portal image and the motor-feedback portal image, so as to superimpose and display the planned portal image and the motor-feedback portal image on the display device, and monitor the The field image deviation of the multi-leaf collimator at the target moment.
The method for monitoring a field according to claim 3, wherein the acquiring the actual field image corresponding to the multi-leaf collimator at the target moment comprises:

Obtain the portal image of the motor feedback at the first moment;

According to the portal image fed back by the motor at the first moment, interpolation is performed on the time line of the portal image fed back by the motor to determine the portal image fed back by the motor at the target moment.
The portal monitoring method according to claim 2, wherein the actual portal image comprises a portal image captured by an electronic portal imaging device;

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

The observation image is output 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 captured by the electronic portal imaging device in a superimposed manner on the display device. , monitoring the field image deviation of the multi-leaf collimator at the target moment.
The method for monitoring a field according to claim 5, wherein the acquiring an actual field image corresponding to the multi-leaf collimator at the target moment comprises:

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

According to the actual portal image at the second moment, interpolation is performed on the time line of the actual portal image to determine the portal image captured by the electronic portal imaging device.
The portal monitoring method according to claim 6, wherein the acquiring the portal image captured by the electronic portal imaging device at the second moment comprises:

When the treatment beam emitted by the treatment head of the radiotherapy apparatus passes through the multi-leaf collimator and the target area at the second moment, the electronic portal imaging device captures the treatment beam passing through the multi-leaf collimator and the target area. Imaging pattern behind the target area;

The contour of the imaging pattern is determined as the actual field image of the multi-leaf collimator at the second moment.
The portal monitoring method according to 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 the observation image to the display device according to the planned portal image and the actual portal image, so as to superimpose and display a plurality of portal images on the display device, and monitor the multi-leaf collimator at the target time field image deviations, including:

If the portal image captured by the electronic portal imaging device has an area that exceeds the maximum portal range, output the observation image to the display device according to the planned portal image and the portal image fed back by the motor, so as to be displayed on the display device. The display device superimposes and displays the planned field image and the field image fed back by the motor, and monitors the field image deviation of the multi-leaf collimator at the target moment.
The portal monitoring method according to claim 8, wherein the observation image is outputted to a display device according to the planned portal image and the actual portal image, so as to display a plurality of shots in a superimposed manner on the display device. monitoring the field image deviation of the multi-leaf collimator at the target moment, further comprising:

If the portal image captured by the electronic portal imaging device does not have an area that exceeds the maximum range of the portal, the observation image is output to the following range according to the planned portal image and the portal image captured by the electronic portal imaging device. A display device is used to superimpose and display the planned portal image and the portal image captured by the electronic portal imaging device on the display device to monitor the deviation of the portal image of the multi-leaf collimator at the target moment.
The portal monitoring method according to 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 the observation image to the display device according to the planned portal image and the actual portal image, so as to superimpose and display a plurality of portal images on the display device, and monitor the multi-leaf collimator at the target time field image deviations, including:

The observed image is output to the display device according to the planned portal image and the actual portal image, so that the planned portal image and the target portal image are superimposed and displayed on the first display window of the display device. The second display window of the device superimposes and displays the planned portal image, the portal image captured by the electronic portal imaging device, and the portal image fed back by the motor;

The target portal image is a portal image fed back by a motor of the multi-leaf collimator or a portal image captured by the electronic portal imaging device.
The portal monitoring method according to claim 1, wherein the observation image is outputted to a display device according to the planned portal image and the actual portal image, so as to display a plurality of radiations in a superimposed manner on the display device. monitoring the field image deviation of the multi-leaf collimator at the target moment, including:

Output the observation image to the 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 on the display device, and monitor the multi-leaf collimator. The deviation of the field image at the target moment.
The method for monitoring a field according to claim 1, wherein the acquiring the planned field image set for the multi-leaf collimator at the target moment in the preset user treatment plan comprises:

Obtain the planned field image at the third moment;

According to the planned portal image at the third moment, interpolation is performed on the time line of the planned portal image to determine the planned portal image.
The portal monitoring method according to claim 12, wherein before acquiring the planned portal image set for the multi-leaf collimator at the target moment in the preset user treatment plan, the method further comprises: When formulating the user's treatment plan, a control point is set for each treatment time, and each control point corresponds to the current gantry rotation angle of the electronic portal imaging device;

The obtaining of the planned field image at the third moment includes:

Determine the target control point at the third moment;

According to the target control point at the third moment, the blade position of the multi-leaf collimator is delineated to obtain the planned field image at the third moment.
The method for monitoring the portal according to claim 1, wherein the contour line corresponding to the planned portal image in the observation image is a first color, and the contour line of the actual portal image in the observation image is a first color. is a second color, the first color and the second color are different.
The portal monitoring method according to claim 14, 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 In the case of , the contour line of the portal image fed back by the motor is the third color, and the contour line of the portal image captured by the electronic portal imaging device is the fourth color.
The portal monitoring method according to claim 1, characterized in that, after outputting the observed image to the display device according to the planned portal image and the actual portal image, the method further comprises:

obtaining a request from a user to adjust the user's treatment plan;

According to the request, adjust the planned field image set for the multi-leaf collimator at a fourth time in the user's treatment plan, where the fourth time is a time after the target time.
A field monitoring method, characterized in that the method comprises:

Display the field monitoring interface of the multi-leaf collimator;

The planned field image at the target time and the actual field image at the target time are superimposed and displayed on the field monitoring interface, so as to monitor the field image deviation of the multi-leaf collimator at the target time;

Wherein, 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, and the planned portal image is for user treatment A pre-planned portal image for the multi-leaf collimator.
A radiotherapy device, characterized in that the radiotherapy device includes an electronic portal imaging device, and the radiotherapy device further includes:

one or more processors;

memory; and

One or more application programs, wherein the one or more application programs 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;

memory; and

One or more application programs, wherein the one or more application programs 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 radiotherapy system, characterized in that the radiotherapy system comprises a radiotherapy device and a display device, the radiotherapy device and the display device are connected in communication, the radiotherapy device is the radiotherapy device according to claim 18, The display device is the display device according to claim 19 .