CN117462856A

CN117462856A - Treatment planning system, radiotherapy system and computer readable storage medium

Info

Publication number: CN117462856A
Application number: CN202311370306.1A
Authority: CN
Inventors: 程宏; 赵喜康
Original assignee: Our United Corp
Current assignee: Our United Corp
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-01-30

Abstract

The present application relates to a treatment planning system, a radiotherapy system and a treatment planning method, wherein the treatment planning system comprises one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to: acquiring a target volume image; obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360; acquiring prescription dose information, wherein the dose information comprises target radiation doses of different areas; a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information. Since the arc drawing information of the treatment plan indicates that the total arc length of the continuous arc drawing of the radiation source in the first direction from the start point to the end point is greater than or equal to 360, i.e. the continuous arc drawing of the radiation source in the first direction from the start point until the end point is stopped, the total arc length is greater than or equal to 360, i.e. when the radiation delivery of the arc drawing irradiation of greater than 360 degrees is performed, the continuous rotation of the radiation source does not need to be rotated in the opposite direction, thereby improving the treatment efficiency.

Description

Treatment planning system, radiotherapy system and computer readable storage medium

Technical Field

The present application relates to the field of radiation therapy, and in particular, to a treatment planning system, a radiation therapy system, and a computer readable storage medium.

Background

Radiation therapy is a common way of treating tumors, and can be used to kill tumor lesions using high energy radiation generated by radiotherapy equipment.

Generally, when radiation treatment is performed on a tumor of a patient, a radiation treatment plan is first formulated according to the condition of the tumor of the patient, and then the radiation device applies a desired radiation dose to the tumor of the patient according to the treatment plan, so as to achieve treatment of the tumor of the patient.

The arc discharge irradiation is used as a radiation treatment mode, and by enabling a radiation source to rotate around the isocenter of a radiation device, rays penetrate through healthy tissues from a non-fixed path, the irradiation dose of the healthy tissues is more dispersed, the healthy tissues are protected, and the focus in the isocenter is irradiated with the maximum dose.

Disclosure of Invention

The embodiment of the application provides a treatment planning system, a radiotherapy system and a computer readable storage medium, wherein the treatment planning system and the radiotherapy system are matched to realize arc irradiation of more than 360 degrees, so that the radiotherapy time is reduced, and the radiotherapy efficiency is improved.

In a first aspect, embodiments of the present application provide a treatment planning system comprising one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor: acquiring a target volume image; obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360; taking prescribed dose information, the dose information including target radiation doses for different regions; a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information.

Illustratively, in the treatment planning system, the processor performs the following operations: acquiring arc discharge mode information; wherein the arc-drawing mode comprises continuous arc drawing or reciprocating arc drawing along a single direction.

For example, if the arc striking information indicates that the radiation source continuously strikes an arc in a single direction or indicates that the total arc length of the radiation source continuously strikes an arc is greater than or equal to 360, the arc striking mode is continuous arc striking in a single direction.

For example, the obtaining the arc discharge information includes: taking starting point information of arc discharge; total arc length information is obtained, wherein the total arc length is greater than or equal to 360.

For example, the obtaining the arc discharge information includes: acquiring the number of turns of arc discharge; acquiring starting point information of arc discharge; acquiring the information of the end point of the arc discharge; wherein, the total arc length based on the starting point, the ending point and the number of turns of the arc pulling is more than or equal to 360.

Illustratively, the treatment planning system further comprises a display device, and the processor is further configured to: and the direction of unidirectional arc drawing and/or the number of arc drawing turns are/is displayed on the display device.

Illustratively, the treatment plan includes a plurality of control points having a total arc length of 360 or more for continuous arc discharge in a first direction from a start point to an end point;

In a second aspect, embodiments of the present application provide a radiation therapy system comprising a gantry that is continuously rotatable, a radiation source disposed on the gantry, and a control system, wherein the gantry drives the radiation source to rotate about a patient for arc discharge; the control system is used for receiving a treatment plan, and the treatment plan is generated according to a target volume image, arc drawing information and prescription dose information, wherein the arc drawing information indicates that the total arc length of a radiation source continuously drawn in one direction from a starting point to an ending point is more than or equal to 360; the treatment plan includes a plurality of control points; the control system is further configured to control the radiation source to rotate in a single direction from the start point to the end point in accordance with the treatment plan; the control system is configured to control the radiation source to emit a beam of radiation toward the target.

Illustratively, the processor is further configured to: during continuous rotational arc discharge of the radiation source, the radiation source is controlled to deliver radiation to the patient.

Illustratively, the radiation therapy system further includes a multi-leaf collimator for beamshaping the beam emitted by the radiation source; the multi-blade grating comprises two blade groups which are oppositely arranged, and each blade group comprises a plurality of blades which can move independently;

The processor is further configured to: the blades of the multi-blade grating are controlled to move continuously while the radiation source delivers radiation to the patient.

Illustratively, the radiation therapy system further includes a multi-leaf collimator for beamshaping the beam emitted by the radiation source; the multi-blade grating comprises two blade groups which are oppositely arranged, and each blade group comprises a plurality of blades which can move independently; the processor is further configured to: during continuous rotary arc discharge of the radiation source, the blade is controlled to move to any position of the blade stroke.

In a third aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program to be loaded by a processor to perform the following operations: acquiring a target volume image; obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360; acquiring prescription dose information, wherein the dose information comprises target radiation doses of different areas; a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information.

The present application relates to a treatment planning system, a radiotherapy system and a treatment planning method, wherein the treatment planning system comprises one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to: acquiring a target volume image; obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360; acquiring prescription dose information, wherein the dose information comprises target radiation doses of different areas; a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information. Since the arc-pulling information of the treatment plan indicates that the total arc length of the radiation source continuously pulling the arc in the first direction from the start point to the end point is greater than or equal to 360, i.e. the radiation source continuously pulls the arc in the first direction from the start point to the end point, the total arc length is greater than or equal to 360, i.e. when delivering radiation for arc-pulling irradiation of greater than 360 degrees, the radiation source continuously rotates the arc without reverse rotation, thereby improving the treatment efficiency.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the application.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

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

FIG. 2 is a flow chart of a treatment plan formulation according to an embodiment of the present application;

FIG. 3 is a schematic drawing of arc discharge information according to an embodiment of the present application;

FIG. 4 is a schematic diagram of arc discharge information according to an embodiment of the present application;

fig. 5 is a flow chart of a treatment plan formulation according to an embodiment of the present application.

Description of the drawings:

a radiation therapy system 100, a radiation delivery device 110, a source 111, a rotating gantry 112, a couch 113, a radiation beam 114, an imaging source 115, a detector 116, a master control system 120, a slave control system 130, a treatment planning system 140, and a memory 150.

Detailed Description

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

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

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

It should be noted that, since the method in the embodiment of the present application is executed in a computer device, the processing object of each computer device exists in the form of data or information, for example, time, which is essentially time information, it can be understood that in the subsequent embodiment, if the size, the number, the position, etc. are all corresponding data exist, so that the computer device can process the data, which is not described herein in detail.

The present application relates to radiation therapy technology, and radiation beams for radiation therapy may include particle beams (e.g., neutron beams, proton beams, electron beams, etc.), photon beams (e.g., X-rays, gamma rays), etc., or combinations thereof. The application provides a treatment planning system, radiotherapy system and computer readable storage medium, treatment planning system and radiotherapy system cooperation realize being greater than 360 degrees and draw the arc and shine, reduce the radiotherapy time, improve radiotherapy efficiency.

Fig. 1 schematically illustrates a radiation therapy system 100 according to some embodiments of the present application, the radiation therapy system 100 comprising: a radiation delivery device 110, a master control system 120, a slave control system 130, a treatment planning system (Treatmeng Planing System, TPS) 140, a memory 150. In some embodiments, radiation delivery device 110, master control system 120, slave control system 130, treatment planning system 140, memory 150 may be connected to and/or communicate with each other via a wireless connection (e.g., a network connection), a wired connection, or a combination thereof.

In some embodiments, radiation delivery device 110 may be a device that delivers radiation therapy. The radiation delivery device 110 can include a radiation source 111, a rotating gantry 112, a treatment couch 113.

The radiation source 111 is capable of generating or emitting a radiation beam 114. The radiation source 111 may comprise a linear accelerator, a treatment head loaded with a radioisotope source (e.g., a cobalt 60 radiation source). The number of the radiation sources 111 may be one or a plurality, for example two.

The rotating gantry 112 is configured to support the radiation source 111 and is capable of rotating the radiation source 111 about a rotational axis, which intersects a central axis of the radiation beam 114 at an isocenter. According to the radiation equipment provided by the embodiment of the application, the rack can continuously rotate along one direction by 360 degrees. For example, the housing may be connected by slip rings to control and/or power so that the housing may be rotated 360 degrees continuously in a clockwise direction or in a counter-clockwise direction.

The treatment couch 113 is configured to carry a patient P, and the treatment couch 113 is translatable in one or more of three orthogonal directions (shown as X, Y and Z-directions in fig. 1). In some embodiments, the treatment couch 113 may also be rotatable about any one or more of the three axes X, Y and Z.

The position of the radiation source 111 relative to the patient, the orientation of the radiation beam 114 relative to the patient, may be achieved by controlling the movement of the rotating gantry 112 and/or the couch 113.

In some embodiments, the radiation delivery device 110 may further include an image-guiding device (including an imaging source 115 and a detector 116) configured to provide a medical image for determining at least a portion of a patient (e.g., a region of interest). In some embodiments, the image directing device may be, for example, a CT device, a cone-beam CT device, a PET device, a volumetric CT device, an MRI device, or the like, or a combination thereof.

In some embodiments, the master control system 120 may be used to generate control instructions for one or more components of the radiation treatment system 100 (e.g., slave control system 130, treatment planning system 140, memory 150). For example: the master control system 120 may send instructions to the slave control system 130 to control the radiation delivery device 110 to initiate an image guidance or treatment process. Another example is: the master control system 120 may send instructions to the treatment planning system 140 and obtain a treatment plan. In some embodiments, the instructions may be entered by a user (e.g., a physician) via a user interface of the main control system 120.

In some embodiments, the slave control system 130 may be used to control the radiation delivery device 110 to perform corresponding actions in response to control instructions generated by the master control system 120. For example: the slave control system 130 may control the movement of the treatment couch 113 of the radiation delivery apparatus 110 to complete the positioning according to the positioning instructions issued by the master control system 120. Another example is: the slave control system 130 may control the movement of the rotating gantry 112 of the radiation delivery device 110 in accordance with radiation delivery instructions issued by the master control system 120 to effect radiation delivery. And the following steps: the slave control system 130 may control the image guidance device of the radiation delivery device 110 to perform image guidance on the patient and generate a medical image of the patient according to the image guidance instructions issued by the master control system 120.

In some embodiments, treatment planning system 140 is configured to determine a treatment plan based on a planning image of a patient (the planning image being an image of the patient acquired with an imaging device prior to treatment) and/or based on at least a portion of an object (e.g., a tumor) represented in an image acquired by an image-guided device.

In some embodiments, the master control system 120 and the treatment planning system 140 may each be a computer device having a graphical user interface (Graphical User Interface, GUI) that includes: one or more processors, memory, and one or more applications. For example: one or more applications in treatment planning system 140 are stored in memory and configured to be executed by a processor to implement the treatment plan generation methods described herein. In some embodiments, the graphical user interface of the treatment planning system 140 is used to interact with the user to make treatment plans.

In some embodiments, the master control system 120 and the treatment planning system 140 may be separate servers, or may be a network or cluster of servers, such as the computer devices described in embodiments of the present application, including but not limited to computers, network hosts, a single network server, a set of multiple network servers, or a cloud server of multiple servers. Wherein the Cloud server is composed of a large number of computers or web servers based on Cloud Computing (Cloud Computing).

In some embodiments, the main control system 120 and the treatment planning system 140 may be one general purpose computer device or one special purpose computer device. In a specific implementation, the computer device may be a desktop, a portable computer, a network server, a palm computer (Personal Digital Assistant, PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, etc., and the embodiment is not limited to the type of computer device.

In some embodiments, the slave control system 130 may be a computer device, which may include a processor, a memory device, an input/output (I/O), and a communication port, and the processor 310 may include a microcontroller, a microprocessor, a Reduced Instruction Set Computer (RISC), an Application Specific Integrated Circuit (ASIC), an application specific instruction set processor (ASIP), a Central Processing Unit (CPU), a Graphics Processor (GPU), a Physical Processor (PPU), a single chip microcomputer, a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), an advanced reduced instruction set system (ARM), a Programmable Logic Device (PLD), any circuit or processor capable of performing at least one function, or the like, or any combination thereof.

The radiation device 100 provided in this embodiment, when performing radiation therapy, the main control system 120 obtains a treatment plan for tumor treatment of a patient from the treatment planning system 130, and issues the obtained treatment plan and control instructions to the slave control system 130, and the slave control system 130 controls the radiation delivery apparatus 110 to deliver radiation therapy to the tumor of the patient according to the treatment plan information and the control instructions.

In some embodiments, the irradiation apparatus 100 can also include one or more other computer devices capable of processing data. For example: a tumor information management system (Oncology Information System, OIS) configured to schedule a treatment plan for the patient and store treatment data (e.g., image data for the patient, treatment plan data, radiation delivery information, etc.).

Memory 150 may store data, instructions, and/or any other information. In some embodiments, memory 150 may store data obtained from treatment planning system 140. In some embodiments, the memory 150 may store data and/or instructions used by the master control system 120 to perform the exemplary methods described herein. In some embodiments, memory 150 may include mass storage, removable storage, volatile read-write memory, read-only memory (ROM), and the like, or any combination thereof. Exemplary mass storage may include magnetic disks, optical disks, solid state drives, and the like. Exemplary removable storage may include flash drives, floppy disks, optical disks, memory cards, compact disks, tape, and the like. Exemplary volatile read-write memory can include Random Access Memory (RAM). Exemplary RAM may include Dynamic Random Access Memory (DRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), static Random Access Memory (SRAM), thyristor random access memory (T-RAM), zero capacitance random access memory (Z-RAM), and the like. Exemplary ROMs may include Mask ROM (MROM), programmable ROM (PROM), erasable Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), compact disk ROM (CD-ROM), and digital versatile disk ROM, among others. In some embodiments, the memory 150 may be implemented on a cloud platform. For example only, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-layer cloud, or the like, or any combination thereof.

In some embodiments, the memory 150 may be connected to a network to communicate with one or more other components of the radiation apparatus 100 (e.g., the master control system 120, the treatment planning system 140, the tumor information management system). One or more components of the radiation device 100 may access data or instructions stored in the memory 150 via a network. In some embodiments, the memory 150 may be directly connected to or in communication with one or more other components of the radiation device 100 (e.g., the main control system 120, the treatment planning system 140, the tumor information management system). In some embodiments, the memory 150 may be part of the main control system 120, the treatment planning system 140, and the tumor information management system.

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

The present application provides a treatment planning system comprising one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor, as shown in fig. 2, comprising:

s101: a target volume image is acquired. The target volume image may be an image comprising a tumor or lesion, or further the target volume image may comprise an image of a tumor or lesion and surrounding tissue, for example. By way of example, the target volume image is typically a three-dimensional image, including CT, MR, PET, or the like, and may be a treatment planning system that imports a volumetric image of the target into the treatment apparatus. The treatment planning system can also fuse and register different images, so as to accurately position a patient planning structure, determine the boundary of a tumor, the shape of the tumor, the distribution characteristics and the position and shape of healthy tissues by means of the characteristics of different image forms, and provide basis for accurately determining a treatment target area, accurately treating a scheme and avoiding sensitive organs.

S102: arc striking information is acquired, wherein the arc striking information indicates that the total arc length of continuous arc striking of the radiation source from a starting point to an ending point along a first direction is greater than or equal to 360.

By way of example, in embodiments of the present application, the first direction may be a clockwise direction or a counter-clockwise direction. The total arc length of successive arc pulling in the first direction is the total arc length of the end point at which rotation in the clockwise or counterclockwise direction directly stops from the start point. It should be noted that, in the existing radiotherapy system, because the rotating gantry is coupled with a large-volume power transmission cable, the transmission is generally performed by adopting a drag chain, according to different lengths of the drag chain, the rotation angle of the gantry is different, and the continuous rotation of more than 360 degrees cannot be realized by adopting the drag chain for transmission. According to the radiation therapy system provided by the embodiment of the invention, the stand can be connected with control and/or power supply through the slip ring, so that the stand can continuously rotate 360 degrees in the clockwise direction or in the anticlockwise direction, and therefore the total arc length of continuous arc drawing of the radiation source from the starting point to the ending point in the first direction is more than or equal to 360 degrees in the embodiment of the invention, and the treatment time and the treatment efficiency can be reduced.

By way of example, the arc discharge information may include a plurality of different parameters. The plurality of different parameters may directly indicate that the total arc length of the continuous arc drawn by the radiation source from the start point to the end point along the first direction is greater than or equal to 360, or may be calculated to obtain that the total arc length of the continuous arc drawn by the radiation source from the start point to the end point along the first direction is greater than or equal to 360.

For example, step S102 includes: acquiring starting point information of arc discharge; total arc length information is obtained, wherein the total arc length is greater than or equal to 360. By way of example, in the treatment planning system provided by the application, a user may input corresponding starting point or total arc length information as needed, and the treatment planning system obtains the arc discharge information input by the user. As shown in fig. 3, taking the clockwise arc direction as an example, the starting point and the ending point are 12 points, and the total arc length is 1000, the treatment planning system calculates the position of the ending point N according to the starting point M and the total arc length, and can be displayed on the display device. I.e. the target arc discharge information indicates that 2.78 revolutions of the arc discharge are completed starting from the start-stop point, i.e. the radiation device completes 2 complete revolutions of the arc discharge starting from the start point M and 0.78 revolutions of the arc discharge, stopping at the end point N. By way of example, the starting point may be a 1 o 'clock direction or a 3 o' clock direction, and the present application is not limited thereto. Fig. 3 illustrates only 12 points as the starting point M.

For example, step S102 includes: acquiring the number of turns of arc discharge; acquiring starting point information of arc discharge; acquiring the information of the end point of the arc discharge; and the total arc length of the arc starting point, the arc stopping point and the arc stopping point based on the number of the arc starting turns, the arc starting point and the arc stopping point is more than or equal to 360. By way of example, in the treatment planning system provided by the application, a user can input the number of times of arc discharge, the starting point of arc discharge and the ending point of arc discharge according to the requirement, and the treatment planning system acquires the arc discharge information input by the user. By way of example, as shown in fig. 4, taking the clockwise arc drawing direction as an example, the starting point is M point, the ending point is N point (seven eighth turns), the number of arc drawing turns is 2, namely 2 complete arc drawing turns and seven eighth turn arc drawing turns are completed, and the total arc length is 935. The starting point, the ending point and the number of arc drawing times can be set by a user according to the needs, and the application is not limited to this, for example, the starting point can be 3 o 'clock direction, the ending point can be 6 o' clock direction, and the number of arc drawing times can be 3. The starting point, the ending point and the number of arc discharge are not limited in the application.

The treatment planning system provided herein further includes a display device, the processor further configured to: the direction of the unidirectional arc drawing and/or the number of arc drawing turns on the display device. By way of example, as shown in fig. 3 or 4, the direction of arc discharge may be displayed by an arrow, but may be displayed in other manners, such as by a text display or a dynamic diagram display. The display device may also display the number of drawn arcs, as in fig. 3, the number of drawn arcs is shown as 2. The present application does not limit the manner of displaying the arc discharge direction and the number of arc discharge turns, and only the above examples are given as examples.

S103: prescription dose information is acquired, the dose information including target radiation doses for different regions. Illustratively, the prescribed dose includes: a prescription dose value, the prescription dose value being the size of the dose received by the tumor treatment area in the treatment target area. For example, the prescribed dose size varies depending on the cancer cell type and location, and the corresponding dose size is generally determined based on the specific characteristics of the tumor. The size of the prescribed dose may be generally input by the attending physician, or the size of the prescribed dose in the treatment target area may be selected according to various parameter values of the tumor, based on a pre-stored template.

S104: a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information.

The treatment planning system may generate a treatment plan based on the acquired target volume image, the arc discharge information, and the prescribed dose information. The radiation therapy system (apparatus) receives the treatment plan and performs in accordance with the treatment plan to achieve the radiation therapy objectives. In one example, the treatment plan includes a plurality of control points that have a sum of arc lengths that continuously arc in a first direction from a start point to an end point that is greater than an arc length of a preset arc. I.e. the radiation source is rotated in a clockwise or counter-clockwise direction from a starting point to a stopping point for continuous arc discharge, the total arc length (2 total radians of rotation as shown in fig. 3 or 4) being equal to or greater than 360.

A treatment planning system provided in an embodiment of the present application includes one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to: acquiring a target volume image; obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360; acquiring prescription dose information, wherein the dose information comprises target radiation doses of different areas; a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information. Since the arc drawing information of the treatment plan indicates that the total arc length of the continuous arc drawing of the radiation source from the starting point to the ending point along the first direction is greater than or equal to 360, i.e. when the radiation delivery of the arc drawing irradiation of more than 360 degrees is performed, the continuous rotation arc drawing of the radiation source does not need to be rotated reversely, thereby improving the treatment efficiency.

Illustratively, in the treatment planning system provided in the embodiments of the present application, as shown in fig. 5, the processor is further configured to execute step 105: and obtaining the arc discharge mode information. It should be noted that, there is no necessary sequence between the step 105 and other steps, and the entering may first obtain the information of the arc striking mode, or may first obtain the information of the arc striking. The present application is not limited thereto, and only the example shown in fig. 5 is used for illustration. Wherein, the arc-drawing mode comprises continuous arc drawing or reciprocating arc drawing along a single direction. For example, continuous arc discharge in a single direction may be continuous multiple rotations of arc discharge in a clockwise or counterclockwise direction. The back and forth arc discharge may be rotated in a clockwise direction by a certain angle and then rotated in a counterclockwise direction. According to the radiation therapy system provided by the embodiment of the application, multiple circles of continuous rotation can be realized, and then continuous arc discharge along a single direction can be that the total arc length of continuous arc discharge along a first direction from a starting point to an ending point of a radiation source is more than or equal to 360.

The treatment planning system provided by the application, if the arc striking information indicates that the radiation source continuously strikes an arc along a single direction or the arc striking information indicates that the total arc length of the radiation source continuously strikes an arc is more than or equal to 360, the arc striking mode is continuous arc striking along the single direction. For example, if the arcing information indicates that the radiation source is continuously arcing in a single direction, the arcing manner is continuous arcing in a single direction. Or if the arc discharge information indicates that the total arc length of the continuous arc discharge of the radiation source is more than or equal to 360, the arc discharge mode is continuous arc discharge along a single direction.

By way of example, a user may select an arc-strike mode in the treatment planning system provided herein. Or, when the arc drawing information indicates that the radiation source continuously draws an arc along a single direction or the arc drawing information indicates that the total arc length of the radiation source continuously draws an arc is more than or equal to 360, the treatment planning system automatically selects to continuously draw an arc along the single direction according to the preset.

The radiation therapy system provided by the embodiment of the invention comprises a frame capable of continuously rotating, a radiation source arranged on the frame and a control system, wherein the frame drives the radiation source to rotate around a patient for arc discharge; the control system is used for receiving a treatment plan, and the treatment plan is generated according to the target volume image, the arc drawing information and the prescription dose information, wherein the arc drawing information indicates that the total arc length of the radiation source for continuously drawing arcs in one direction from the starting point to the ending point is more than or equal to 360; the treatment plan includes a plurality of control points, the control system further configured to control the radiation source to rotate in a single direction from the start point to the end point in accordance with the treatment plan; the control system is configured to control the radiation source to emit a beam of radiation toward the target.

By way of example, as with radiation therapy system 100 shown in fig. 1, radiation therapy system 100 includes: a radiation delivery device 110, a master control system 120, a slave control system 130, a treatment planning system (Treatmeng Planing System, TPS) 140, a memory 150. In some embodiments, radiation delivery device 110, master control system 120, slave control system 130, treatment planning system 140, memory 150 may be connected to and/or communicate with each other via a wireless connection (e.g., a network connection), a wired connection, or a combination thereof.

The radiation therapy system provided by the embodiment of the application, the control system comprises a master control system and a slave control system. For example, master control system 120 is a host computer that can send instructions to slave control system 130, the lower computer, to control radiation delivery device 110 treatment. Another example is: the master control system 120 may send instructions to the treatment planning system 140 and obtain a treatment plan.

The radiation therapy system acquires a treatment plan and controls the movement of each component of the radiation therapy system according to the treatment plan to fulfill the requirements of the treatment plan. By way of example, if the treatment plan indicates that the total arc length of the radiation source that continuously arcs in a single direction from the start point to the end point is greater than the arc length of the preset arc, the treatment plan includes a plurality of control points, and the control system is further configured to control the radiation source to rotate in the single direction from the start point to the end point, i.e., the radiation source continuously arcs in the single direction from the start point to the end point, with the total arc length being greater than or equal to 360. That is, when radiation delivery is performed with an arc of greater than 360 degrees, the radiation source continues to rotate the arc without counter rotation, thereby improving treatment efficiency.

By way of example, the present application provides a radiation therapy system, the processor further configured to: during continuous rotational arc discharge of the radiation source, the radiation source is controlled to deliver radiation to the patient.

For example, the control system may control the radiation source to deliver radiation to the patient during a longitudinal continuous rotational movement of the radiation source around the patient as required by the treatment plan. In some embodiments, when the radiation source's exposure range prescribed by the treatment plan includes a plurality of exposure arc segments, the control system may control the radiation source to emit treatment radiation to the patient for radiation delivery at the arc segments that require exposure by the radiation source; and controlling the radiation source to stop irradiating in an arc section which does not need to be irradiated by the radiation source. In some embodiments, when the irradiation range of the radiation source prescribed by the treatment plan is a continuous full revolution (e.g., 1 revolution, 2 revolutions, N revolutions), the control system may control the radiation source to emit radiation rays toward the patient for radiation delivery while continuously rotating about the longitudinal direction of the patient.

In some embodiments, the radiation therapy system provided by embodiments of the present application further comprises a multi-leaf collimator. Illustratively, in an embodiment of the present application, the control system is further configured to: the multi-leaf collimator leaf is controlled to move continuously while the radiation source delivers radiation to the patient.

The multi-blade grating comprises two blade groups which are oppositely arranged, each blade group comprises a plurality of blades which are arranged along the width direction of each blade, and each blade in the plurality of blades can independently move along the length direction of the blade. By independent movement of the leaves in the plurality of leaves, an aperture which is adapted to the shape of the tumor is formed by enclosing. Since the leaves of the multi-leaf collimator are made of a material (such as lead, tungsten, etc.) having a shielding effect on the therapeutic radiation, the multi-leaf collimator can shield the therapeutic radiation outside the aperture and deliver the radiation to the tumor area using the therapeutic radiation passing through the aperture, thereby realizing the beam shape of the therapeutic radiation.

In order to achieve a higher radiation dose to the tumor region while minimizing the radiation dose received by surrounding normal tissue, the processor provided by embodiments of the present application is further configured to: while the radiation source delivers radiation to the patient, the blades of the multi-leaf collimator are controlled to move continuously, i.e.: the radiation source emits beams while the multi-circle continuous rotation arc discharge is performed, and the blades of the multi-leaf collimator continuously move, so that the VMAT (volume rotation intensity) with multiple circles is realized.

Illustratively, the radiation treatment apparatus of the radiation treatment system further comprises a multi-leaf collimator for beaming the beam emitted by the radiation source; the multi-leaf collimator comprises two oppositely arranged leaf banks, each leaf bank comprising a plurality of independently movable leaves. The processor is further configured to: during continuous rotary arc discharge of the radiation source, the blade is controlled to move to any position of the blade stroke. For example, the maximum travel of the blade motion of the multi-blade grating is 24cm, and the blade can be stopped at any position within the maximum travel range (such as 10, 15, 18, 20 and the like, and the blade is controlled to stop according to the requirements of shape adaption and intensity adjustment specifically), so that rays are shielded by the blade to carry out intensity adjustment. For example, the maximum stroke of the multi-leaf collimator may be 15 or 28, etc., and the stroke of the multi-leaf collimator is not particularly limited in the present application, and the above description is merely given by way of example. By way of example, on the one hand, multiple turns of continuous arc drawing is performed, while the radiation source emits radiation rays, and simultaneously the multi-leaf grating blades move to perform shape adaptation and intensity adjustment, so that multiple turns of rotating volume intensity adjustment is realized.

In order to achieve a higher radiation dose to the tumor region while minimizing the radiation dose received by surrounding normal tissue, the control system provided by embodiments of the present application is further configured to: while the radiation source delivers radiation to the patient, the blades of the multi-leaf collimator are controlled to move continuously, i.e.: the blades of the multi-blade grating are continuously moving while the radiation source emits the beam.

In some examples, the control system provided by the embodiments of the present application is further configured to: the treatment couch is controlled to remain stationary during the delivery of radiation to the patient by the radiation source. Namely: the processor controls the couch to remain stationary and no movement occurs while the radiation source is emitting a beam.

In some examples, the control system provided by the embodiments of the present application is further configured to: during the delivery of radiation to the patient by the radiation source, the treatment couch is controlled to move in the longitudinal direction of the patient. Specifically, the control system controls the treatment couch to move unidirectionally or reciprocally at a constant or non-constant speed along the longitudinal direction (Y-direction) of the patient as the radiation source emits the beam.

In some embodiments, the radiotherapy apparatus of the radiotherapy system provided in the embodiments of the present application further comprises an imaging device for acquiring an image of the patient, the control system provided in the embodiments of the present application further configured to: the imaging device is controlled to acquire images of the patient during a continuous rotational movement of the radiation source about the longitudinal direction of the patient.

Wherein, as shown in fig. 1, the imaging device comprises an imaging source 115 and a detector 116 which are oppositely arranged, and imaging rays emitted by the imaging source 115 pass through a tumor part of a patient and are received by the detector 116 for generating an image of the tumor part of the patient. In some embodiments, the control system controls the imaging device to acquire images of the patient during a longitudinal continuous rotational movement of the radiation source around the patient, and the imaging device may be in an out-beam state or in a stop-out-beam state when performing image acquisition of the patient, i.e.: the patient image acquisition may be performed simultaneously with the radiation source beam exit or alternatively.

In some embodiments, the radiation treatment apparatus of the radiation treatment system of embodiments of the present application further comprises a slip ring for effecting unrestricted continuous rotation of the radiation source. The slip ring comprises a stator and a rotor, the stator and the rotor are communicated through a conductive loop, and the transmission of power, signals and the like of the radiation source is realized through the relative rotation between the stator and the rotor. The stator lead-out wire of the slip ring is illustratively connected to a power source/signal source, and the rotor lead-out wire is connected to a radiation source, which is powered/signal by the rotational movement of the radiation source, causing rotational contact between the stator and rotor.

By way of example, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program to be loaded by a processor to perform the following operations: acquiring a target volume image; obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360; acquiring prescription dose information, wherein the dose information comprises target radiation doses of different areas; a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information.

The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations of the present invention may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

It will be appreciated by those of ordinary skill in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device, or distributed over a network of computing devices, or they may alternatively be implemented in program code executable by a computer device, such that they are stored in a memory device and executed by the computing device, or they may be separately fabricated as individual integrated circuit modules, or multiple modules or steps within them may be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A treatment planning system comprising one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor:

acquiring a target volume image;

obtaining arc drawing information, wherein the arc drawing information indicates that the total arc length of continuous arc drawing of the radiation source from a starting point to an ending point along a first direction is more than or equal to 360;

acquiring prescription dose information, wherein the dose information comprises target radiation doses of different areas;

a treatment plan is generated from the target volume image, the arc discharge information, and the prescribed dose information.

2. The treatment planning system of claim 1, wherein the processor further performs the following:

acquiring arc discharge mode information; wherein the arc-drawing mode comprises continuous arc drawing or reciprocating arc drawing along a single direction.

3. The treatment planning system of claim 2 wherein,

and if the arc discharge information indicates that the radiation source continuously discharges arcs along one direction or indicates that the total arc length of the radiation source continuously discharges arcs is more than or equal to 360, the arc discharge mode is continuous arc discharge along one direction.

4. The treatment planning system of claim 1 wherein,

the obtaining the arc drawing information comprises the following steps:

acquiring starting point information of arc discharge;

total arc length information is obtained, wherein the total arc length is greater than or equal to 360.

5. The treatment planning system of claim 1 wherein the obtaining arc discharge information comprises:

acquiring the number of turns of arc discharge;

acquiring starting point information of arc discharge;

acquiring the information of the end point of the arc discharge;

and the total arc length of the arc starting point, the arc stopping point and the arc stopping point based on the number of the arc starting turns, the arc starting point and the arc stopping point is more than or equal to 360.

6. The treatment planning system of claim 1, wherein the system further comprises a display device, the processor further configured to:

and the direction of unidirectional arc drawing and/or the number of arc drawing turns are/is displayed on the display device.

7. The treatment planning system of claim 1 wherein the treatment plan comprises a plurality of control points having a total arc length of 360 or more for continuous arc discharge in the first direction from a start point to an end point.

8. The radiotherapy system is characterized by comprising a frame capable of continuously rotating, a radiation source arranged on the frame and a control system, wherein the frame drives the radiation source to rotate around a patient for arc discharge;

The control system is used for receiving a treatment plan, and the treatment plan is generated according to a target volume image, arc drawing information and prescription dose information, wherein the arc drawing information indicates that the total arc length of a radiation source continuously drawn in one direction from a starting point to an ending point is more than or equal to 360;

the treatment plan includes a plurality of control points;

the control system is further configured to control the radiation source to rotate in a single direction from the start point to the end point in accordance with the treatment plan;

the control system is configured to control the radiation source to emit a beam of radiation toward the target.

9. The radiation therapy system of claim 8, wherein said processor is further configured to:

during continuous rotational arc discharge of the radiation source, the radiation source is controlled to deliver radiation to the patient.

10. The radiation therapy system of claim 8, further comprising a multi-leaf collimator for beaming a beam emitted by the radiation source; the multi-blade grating comprises two blade groups which are oppositely arranged, and each blade group comprises a plurality of blades which can move independently;

11. The radiation therapy system of claim 8, further comprising a multi-leaf collimator for beaming a beam emitted by the radiation source; the multi-blade grating comprises two blade groups which are oppositely arranged, and each blade group comprises a plurality of blades which can move independently;

the processor is further configured to: during continuous rotary arc discharge of the radiation source, the blade is controlled to move to any position of the blade stroke.

12. A computer-readable storage medium, having stored thereon a computer program, the computer program being loaded by a processor to perform the following operations:

acquiring a target volume image;