WO2022140986A1 - Method and apparatus for determining arcing start and end angles for multi-target treatment, and electronic device - Google Patents

Abstract

A method and apparatus for determining arcing start and end angles for multi-target treatment, and an electronic device. The method comprises: according to an objective arcing start angle, an objective arcing end angle and a rack arcing frequency corresponding to an ith target to be treated among N targets to be treated, determining a rack stop angle corresponding to the ith target to be treated (S201); and according to the rack stop angle corresponding to the ith target to be treated and an angle interval between an original arcing start angle and an original arcing end angle corresponding to an (i+1)th target to be treated, determining an objective arcing start angle and an objective arcing end angle corresponding to the (i+1)th target to be treated (S202). On the basis of the present method, an objective arcing start angle corresponding to an (i+1)th target to be treated can be made to be close to a rack stop angle corresponding to an ith target to be treated, thereby shortening a rack rotation time when two adjacent targets to be treated are switched during a radiation treatment process, shortening the whole treatment duration, and reducing leaked radiation dosage received by a patient.

Description

Arc start and stop angle determination method, device and electronic equipment for multi-target therapy technical field

The embodiments of the present application relate to the field of radiotherapy, and in particular, to a method, a device, and an electronic device for determining an arc start and stop angle for multi-target therapy.

Background technique

Radiation therapy is an effective means of treating tumors in patients and is widely used in clinical practice. With the continuous development of radiotherapy technology, many current radiotherapy systems can achieve automatic treatment, that is, in the case of multi-target irradiation in one treatment, the radiotherapy system can automatically start the treatment after the completion of the treatment of one target to be treated. A target to be treated.

However, in the related art, when the radiotherapy system performs automatic treatment, each target to be treated is treated in sequence according to the targets planned in the treatment plan. Due to various reasons such as the back-and-forth arc drawing of the gantry during the treatment process, simply automatically switching the target points to be treated according to such a target point sequence may lead to excessively long switching time when switching between target points, resulting in the entire patient's entire life cycle. The treatment duration was longer and more missed doses were received.

SUMMARY OF THE INVENTION

In view of this, one of the technical problems solved by the embodiments of the present application is to provide a method, device, electronic device and computer storage medium for determining the arc start and stop angle for multi-target therapy, so as to overcome all or some of the above-mentioned defects. .

In the first aspect, the embodiments of the present application provide a method for determining the starting and stopping angles of arcs for multi-target therapy, including:

Determine the machine corresponding to the ith target to be treated according to the target arc starting angle, the target arc ending angle and the number of rack arcs corresponding to the ith target to be treated among the N targets to be treated The stand stop angle, where i is an integer between 1 and N-1, and N is an integer greater than 1, and where, when i=1, the target arc starting corresponding to the i-th target to be treated The angle and the target arc ending angle are respectively the original arc starting angle and the original arc ending angle corresponding to the i-th target to be treated;

According to the angular interval between the gantry stop angle corresponding to the i-th target to be treated and the original arc-drawing start angle and original arc-drawing end angle corresponding to the i+1-th target to be treated, determine the The target arc start angle and target arc end angle corresponding to the i+1 target points to be treated.

Optionally, in an embodiment of the present application, according to the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated and the angular interval between the original arc end angle, determine the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, including:

If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the point and the original arc termination angle corresponding to the i+1 th target to be treated, then the original arc corresponding to the i+1 th target to be treated The starting angle is determined as the target arc end angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the ith +1 target arc starting angle corresponding to the target to be treated.

Optionally, in an embodiment of the present application, according to the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated and the angular interval between the original arc end angle, determine the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, including:

If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is not greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the target point and the original arc end angle corresponding to the i+1 th target to be treated, then the original pull corresponding to the i+1 th target to be treated is The arc start angle is determined as the target arc starting angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the The target arc end angle corresponding to the i+1th target to be treated.

Optionally, in an embodiment of the present application, according to the target arc starting angle, the target arc ending angle and the rack pull corresponding to the i-th target to be treated among the N targets to be treated Arc times, determine the gantry stop angle corresponding to the i-th target to be treated, including:

If the number of arcs of the gantry corresponding to the i-th target to be treated is an even number, the target arc-pulling start angle corresponding to the i-th target to be treated is determined as the i-th target to be treated Corresponding rack stop angle.

Optionally, in an embodiment of the present application, according to the target arc starting angle, the target arc ending angle and the rack pull corresponding to the i-th target to be treated among the N targets to be treated Arc times, determine the gantry stop angle corresponding to the i-th target to be treated, including:

If the number of arcs of the rack corresponding to the i-th target to be treated is an odd number, the target arc-pulling termination angle corresponding to the i-th target to be treated is determined as the corresponding to the i-th target to be treated the rack stop angle.

Optionally, in an embodiment of the present application, according to the target arc starting angle, the target arc ending angle and the rack pull corresponding to the i-th target to be treated among the N targets to be treated The number of arcs, before determining the gantry stop angle corresponding to the i-th target to be treated, also includes:

The N targets to be treated are sorted according to the gamma angles corresponding to the N targets to be treated, so that the targets to be treated with the same gamma angle are adjacent to each other.

Optionally, in an embodiment of the present application, before the sorting of the N targets to be treated according to the gamma angles corresponding to the N targets to be treated, the method further includes: acquiring the patient's location The positioning method of the patient includes invasive positioning and non-invasive positioning;

Correspondingly, the sorting of the N targets to be treated according to the gamma angles corresponding to the N targets to be treated includes: when it is determined that the positioning mode of the patient is invasive positioning, according to the N targets The N to-be-treated targets are sorted by gamma angles corresponding to the N to-be-treated targets.

Optionally, in an embodiment of the present application, the method further includes: when it is determined that the positioning mode of the patient is non-invasive positioning, executing the i-th to-be-treated according to the N targets to be treated The step of determining the gantry stop angle corresponding to the i-th target point to be treated by determining the target arc starting angle, the target arc ending angle and the number of times of the gantry arc corresponding to the target point.

In the second aspect, the embodiments of the present application provide a device for determining the starting and stopping angles of arcs for multi-target therapy, which is characterized in that it includes:

The first determination module is used to determine the i-th target to be treated according to the target arc starting angle, the target arc ending angle and the number of rack arcs corresponding to the ith target to be treated among the N targets to be treated. The stop angle of the gantry corresponding to the target point, where i is an integer between 1 and N-1, and N is an integer greater than 1, and where, when i=1, the target pulls the i-th target to be treated. The arc starting angle and the target arc ending angle are the original arc starting angle and the original arc ending angle corresponding to the i-th target to be treated;

The second determination module is used to determine the angular interval between the gantry stop angle corresponding to the ith target to be treated and the original arc starting angle and the original arc ending angle corresponding to the i+1 target to be treated , determine the target arc start angle and target arc end angle corresponding to the i+1th target to be treated.

Optionally, in an embodiment of the present application, the second determining module is specifically configured to:

If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is greater than the gantry stop corresponding to the i-th target to be treated The absolute value of the difference between the angle and the original arc end angle corresponding to the i+1th target to be treated, then the original arc start angle corresponding to the i+1th target to be treated is determined as the i+1th The target arc end angle corresponding to the target to be treated is determined, and the original arc end angle corresponding to the i+1 th target to be treated is determined as the target arc start angle corresponding to the i+1 target to be treated.

Optionally, in an embodiment of the present application, the second determining module is specifically configured to:

If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is not greater than the gantry corresponding to the i-th target to be treated The absolute value of the difference between the stop angle and the original arc end angle corresponding to the i+1th target to be treated, then the original arc start angle corresponding to the i+1th target to be treated is determined as the i+1th target arc starting angle corresponding to each target to be treated, and the original arc ending angle corresponding to the i+1 target to be treated is determined as the target arc ending angle corresponding to the i+1 target to be treated .

Optionally, in an embodiment of the present application, the second determining module is specifically configured to:

If the number of arcs of the gantry corresponding to the ith target to be treated is an even number, the starting angle of the arc of the gantry corresponding to the ith target to be treated is determined as the stop angle of the gantry corresponding to the ith target to be treated .

Optionally, in an embodiment of the present application, the second determining module is specifically configured to:

If the number of arcs of the gantry corresponding to the i-th target to be treated is an odd number, the target arc-drawing termination angle corresponding to the i-th target to be treated is determined as the gantry stop angle corresponding to the i-th target to be treated.

Optionally, in an embodiment of the present application, a sorting module is further included, configured to sort the N targets to be treated according to the gamma angles corresponding to the N targets to be treated, so that the gamma The same targets to be treated are adjacent to each other.

Optionally, in an embodiment of the present application, an acquisition module is further included for acquiring a positioning mode of the patient, where the positioning mode of the patient includes invasive positioning and non-invasive positioning;

Correspondingly, the sorting module is specifically configured to: when it is determined that the positioning mode of the patient is invasive positioning, sorting the N targets to be treated according to the gamma angles corresponding to the N targets to be treated .

Optionally, in an embodiment of the present application, the first determination module is further configured to: when it is determined that the positioning mode of the patient is non-invasive positioning, according to the i-th target to be treated in the N targets to be treated The starting angle of the target arc drawing, the target arc drawing ending angle and the number of times of the gantry arc drawing corresponding to the treatment target point are used to determine the gantry stop angle corresponding to the i-th target point to be treated.

In a third aspect, an embodiment of the present application provides an electronic device, which includes a memory and a processor, where program instructions are stored in the memory, and the processor is configured to call the program instructions in the memory to execute the process as described in the third aspect. The method for determining an arc start and stop angle for multi-target therapy according to any one of the aspects.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program, the computer program including program instructions, and the program instructions are configured to cause the processor to cause the processor to execute the program instructions when executed by the processor. The method for determining an arc start and stop angle for multi-target therapy according to any one of the first aspects is performed.

The method for determining the starting and ending angles of arcs for multi-target therapy according to the embodiment of the present application is based on the target arc starting angle and the target arc ending angle corresponding to the ith target to be treated among the N targets to be treated. Determine the gantry stop angle corresponding to the ith target to be treated and the number of arcs of the gantry, and according to the gantry stop angle corresponding to the ith target to be treated and the original pull corresponding to the i+1 target to be treated. The angular interval between the arc start angle and the original arc end angle determines the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, which can make the i+1th target to be treated The target arc starting angle corresponding to the point is close to the gantry stop angle corresponding to the i-th target to be treated, so that the starting angle of the gantry is close to the i-th target to be treated when treating the i+1 target to be treated. The stop angle of the gantry corresponding to the target point shortens the rotation time of the gantry when the two adjacent target points to be treated are switched during the radiotherapy process, thereby shortening the entire treatment time and reducing the leakage dose received by the patient.

Description of drawings

Hereinafter, some specific embodiments of the embodiments of the present application will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

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

2 is a flow chart of a method for determining the starting and stopping angles of arcs for multi-target therapy provided by an embodiment of the present application;

3 is a flowchart of another method for determining the starting and stopping angles of arcs for multi-target therapy provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a starting angle of arc drawing for multi-target therapy according to Embodiment 4 of the present application; and

FIG. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed ways

Implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time.

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The embodiments described above are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application should fall within the protection scope of the embodiments of the present application.

FIG. 1 is a schematic frame diagram of a radiation therapy system provided by an embodiment of the present application. As shown in FIG. 1 , the radiation therapy system 10 may include an upper computer 101 , a lower computer 102 and a radiation therapy equipment 103 . The radiotherapy apparatus 103 includes a radiotherapy apparatus 1031 and a patient support apparatus 1032 . The radiation therapy device 1031 can generate a rotating focused beam, and the focused focal point is used to irradiate the target to be treated. The patient support 1032 is used to carry the patient and align the patient's target to be treated with the beam focal position. The upper computer 101 may be a control device of the radiation therapy system, and the lower computer 102 may be a device that can directly control the radiation device and obtain the working state of the radiation device. Generally, the upper computer 101 obtains the operation command, and then sends the operation command to the lower computer 102, and the lower computer 102 controls the operation of the radiation equipment according to the manipulation command. It should be understood that the radiation therapy system shown in FIG. 1 is only an exemplary framework for explaining the radiation therapy system to which the method for determining the arc start and stop angle of multi-target therapy provided by the embodiment of the present application is applied, and the present embodiment is not limited thereto.

The upper computer 101 and the lower computer 102 in the radiation therapy system shown in FIG. 1 have the function of automatically starting the treatment of the next target to be treated after the treatment of one target to be treated is completed. However, due to the gantry of the radiation device 1031 Due to reasons such as round-trip arc drawing, the stop position of the gantry after the treatment of the previous target to be treated is completed is too far from the starting position of the gantry corresponding to the next target, so that the switching time is too long when switching between targets. had longer overall treatment duration and received more missed doses.

It should be noted that the radiotherapy equipment can be a "Gamma Knife" as shown in Figure 1, and correspondingly, the radiotherapy device can be understood as a "Gamma Knife" treatment head, and the "Gamma Knife" treatment head at least includes a radiation source, followed by Nested shield, source carrier and collimator. Among them, the carrier body carries the radiation source, and the collimator body has a collimation channel. When the radiation source is aligned with the collimation channel, the Gamma Knife is open source, and the radiation source emits a focused beam that is focused on the focal point through the collimation channel. When the collimation channel is staggered, the Gamma Knife turns off the source, and the shield is used to shield the beam emitted by the radioactive source. In addition, when the Gamma Knife is open source, the carrier and the collimator can also be wound around the shield. The rotation axis draws the arc back and forth. In this way, the rack can be understood as a source carrier and a collimator that are nested together.

Of course, the radiotherapy device can be a separate radiotherapy head, which can be set on a gantry, and the rotation of the gantry drives the radiotherapy head to reciprocate and rotate around the rotation axis. Here, the gantry can be a ring frame, a C-arm frame, a drum shaped rack, etc.

In the embodiment of the present application, the i-th target to be treated is determined according to the target arc starting angle, the target arc ending angle and the number of rack arcs corresponding to the ith target to be treated among the N targets to be treated. The gantry stop angle corresponding to the point, and according to the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle and original arc-ending angle corresponding to the i+1 target to be treated The angle interval determines the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, so that the target arc start angle corresponding to the i+1th target to be treated is close to the ith target. The stop angle of the gantry corresponding to the target to be treated makes the starting angle of the gantry close to the stop angle of the gantry corresponding to the ith target to be treated when the i+1 target to be treated is treated, which shortens the time required for radiation treatment. During the treatment process, the rotation time of the gantry when two adjacent target points to be treated are switched, thereby shortening the entire treatment time and reducing the leakage dose received by the patient.

The specific implementation of the embodiments of the present application is further described below with reference to the accompanying drawings of the embodiments of the present application.

FIG. 2 is a flowchart of a method for determining an arc start and stop angle for multi-target therapy according to an embodiment of the present application. The method can be executed by the host computer 101 in the radiotherapy system, or can be executed by the arc start and stop angle determination device for multi-target therapy connected to the host computer 101 in the radiotherapy system. Not limited. As shown in Figure 2, the method for determining the start and stop angle of the arc drawing includes the following steps:

S201, according to the target arc starting angle, the target arc ending angle and the rack arc drawing times corresponding to the i-th target to be treated among the N targets to be treated, determine the corresponding to the i-th target to be treated The stop angle of the gantry is determined, and the stop angle of the gantry corresponding to the i-th target to be treated is determined.

Among them, i is an integer between 1 and N-1, and N is an integer greater than 1. And wherein, when i=1, the target arc starting angle and target arc ending angle corresponding to the i-th target to be treated are respectively the original arc-drawing start corresponding to the i-th target to be treated. The angle and the original arc end angle.

In this embodiment, the target to be treated is a target position that needs to be treated planned in the treatment plan. This embodiment is applicable to a scenario where multiple targets are irradiated in one treatment. The number N of targets to be treated is predetermined in the treatment plan according to the actual situation, and it can be 2, 3, 4, 5 or more. This embodiment does not limit this. The i th target to be treated is the i th target to be treated planned in the treatment plan and arranged in the order of treatment among the N targets to be treated. In this step, i is 1, which represents the first target to be treated among the N targets to be treated.

When formulating a treatment plan, due to differences in the position of the organ where the target to be treated is located and the total planned irradiation dose, and under the condition of uniform dose distribution, a different arc-drawing range of the rack is usually set for each target to be treated. Among them, the arc drawing range of the rack includes the original arc drawing starting angle and the original arc drawing ending angle. The original arc drawing starting angle and the original arc drawing ending angle respectively refer to the first arc drawing in the rack for each target to be treated. The start and end position of the rack in the process. For example, if the arcing range of the rack corresponding to a target to be treated is -180 degrees to 180 degrees, the original arcing starting angle corresponding to the target to be treated is -180 degrees, and the original arcing ending angle is 180 degree. For another example, if the arc-drawing range of a certain target to be treated is 90 degrees to -90 degrees, the original arc-drawing start angle corresponding to the to-be-treated target point is 90 degrees, and the original arc drawing ending angle is -90 degrees. . It should be understood that the arc-drawing range of the gantry of the target to be treated may be any other angular range, and the specific arc-drawing range of the gantry is not limited in this embodiment.

In this embodiment, in order to shorten the switching time of the gantry between adjacent targets to be treated during the treatment process, the original arc starting angle and the original arc ending angle will be adjusted to target each target to be treated. Redetermine the arc start angle and arc end angle. In this embodiment, for the convenience of description, the finally determined arc-drawing start angle and arc-drawing end angle are respectively referred to as the target arc-drawing start angle and the target arc-drawing end angle.

In addition, when making a treatment plan, according to the different dose requirements of the target to be treated, the number of times of arc drawing of the rack is usually set for each target to be treated. The number of gantry arcs refers to the number of times the gantry travels back and forth within the corresponding gantry arcing range for each target to be treated. For example, the number of arcs of the gantry corresponding to a target to be treated is 3, and the arc of the gantry ranges from -90 degrees to 90 degrees. When performing radiotherapy on the target to be treated, the gantry needs to be drawn from -90 degrees to 90 degrees. Rotate from 90 degrees to 90 degrees, then from 90 degrees to -90 degrees, and finally from -90 degrees to 90 degrees, thus completing the radiation therapy to the target to be treated.

In this embodiment, the determination of the target arc starting angle and the target arc ending angle corresponding to each target to be treated depends on the stop angle of the gantry corresponding to the adjacent previous target to be treated. The gantry stop angle refers to the position where the gantry stops when the treatment of a certain target to be treated is completed. The gantry stop angle of each target to be treated depends not only on its corresponding target arc starting angle and target arc ending angle, but also on its corresponding gantry arc drawing times. The arc-drawing rack has different arc-drawing times, and the corresponding rack stop angle can be the target arc-drawing start angle or the target arc-drawing end angle. For example, if the number of gantry arcs corresponding to the i-th target to be treated is 1, and the corresponding target arc start angle and target arc end angle are -90 degrees and 90 degrees, respectively, during the radiation therapy , the gantry is rotated from -90 degrees to 90 degrees to perform an arc drawing, so the gantry stop angle corresponding to the i-th target to be treated is 90 degrees. For another example, if the number of arcs of the gantry corresponding to the i-th target to be treated is 2, and the corresponding target arc start angle and target arc end angle are still -90 degrees and 90 degrees, respectively, then in the radiation During the treatment, the gantry rotates from -90 degrees to 90 degrees to perform the first arc drawing, and then the gantry rotates from 90 degrees to -90 degrees to perform the second arc drawing. Therefore, the machine corresponding to the i-th target to be treated. The stand stop angle is 90 degrees.

To this end, optionally, in a possible implementation manner of the present application, in a possible implementation manner of the present application, according to the target arc starting angle corresponding to the i-th target to be treated, the target When determining the stop angle of the gantry corresponding to the i-th target to be treated, if the arc-drawing times of the gantry corresponding to the i-th target to be treated is an even number, the i-th target The original arc starting angle corresponding to the target to be treated is determined as the stop angle of the gantry corresponding to the i-th target to be treated. If the number of arcs of the gantry corresponding to the ith target to be treated is an odd number, the original arc termination angle corresponding to the ith target to be treated is determined as the stop angle of the gantry corresponding to the first target to be treated.

It should be noted that, since the original arc starting angle and original arc ending angle corresponding to the first target to be treated do not need to be adjusted during the treatment process, in this embodiment, the first target to be treated is The corresponding target arc starting angle and target arc ending angle are the original arc starting angle and the original arc ending angle corresponding to the first target to be treated.

S202, according to the angular interval between the gantry stop angle corresponding to the i-th target to be treated and the original arc-drawing start angle and the original arc-drawing end angle corresponding to the i+1-th target to be treated, determine the i+th The target arc start angle and target arc end angle corresponding to a target to be treated.

After determining the gantry stop angle corresponding to the i-th target to be treated, based on the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated The angular interval between the original arc end angle and the original arc end angle to determine the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, so that the i+1th target to be treated corresponds to The starting angle of the target arc drawing is close to the stop angle of the gantry corresponding to the ith target to be treated, so that the starting angle of the gantry is close to the corresponding ith target to be treated when treating the i+1 target to be treated. The stop angle of the gantry shortens the rotation time of the gantry when the two adjacent target points to be treated are switched during the radiotherapy process, thereby shortening the entire treatment time and reducing the leakage dose received by the patient.

Based on the embodiment shown in FIG. 2 , and further, as shown in FIG. 3 , the embodiment of the present application provides another method for determining the starting and stopping angle of an arc for multi-target therapy. The difference between this embodiment and the embodiment shown in FIG. 2 is that a specific implementation manner for determining the gantry start angle and gantry stop angle corresponding to the i+1 th target to be treated is given. As shown in Figure 3, the method for determining the start and stop angle of the arc drawing includes:

S301. According to the target arc starting angle, the target arc ending angle and the rack arc drawing times corresponding to the i-th target to be treated among the N targets to be treated, determine that the i-th target to be treated corresponds to the target arc. The stop angle of the gantry is determined, and the stop angle of the gantry corresponding to the i-th target to be treated is determined.

Among them, i is an integer between 1 and N-1, and N is an integer greater than 1. And wherein, when i=1, the target arc starting angle and target arc ending angle corresponding to the ith target to be treated are the original arc starting angle and the corresponding ith target to be treated, respectively. The original arc end angle.

S302. Determine whether the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is greater than that of the i-th target to be treated If the absolute value of the difference between the gantry stop angle and the original arc termination angle corresponding to the i+1 th target point to be treated is greater than that, step S303 is performed; if not, step S304 is performed.

S303. Determine the original arc starting angle corresponding to the i+1 th target to be treated as the target arc ending angle corresponding to the i+1 th target to be treated, and set the i+1 th target to be treated as the target arc ending angle. The corresponding original arc end angle is determined as the target arc start angle corresponding to the i+1th target to be treated.

S304: Determine the original arc starting angle corresponding to the i+1 th target to be treated as the target arc starting angle corresponding to the i+1 th target to be treated, and set the i+1 th target to be treated as the target arc starting angle The original arc end angle corresponding to the point is determined as the target arc end angle corresponding to the i+1th target to be treated.

In this embodiment, the working principle and effect of step S301 are the same as those of step S201 in the embodiment shown in FIG. 1 . In order to avoid repetition, details are not repeated here.

In this embodiment, based on the principle that the arc drawing direction of the gantry does not affect the effect of radiation therapy, the gantry stop angle corresponding to the i-th target to be treated and the original arc-drawing start corresponding to the i+1-th target to be treated When the absolute value of the angle difference is greater than the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc end angle corresponding to the i+1-th target to be treated, replace the i+1-th The arc starting angle and arc ending angle corresponding to the target to be treated, that is, the original arc starting angle corresponding to the i+1 target to be treated as the target arc corresponding to the i+1 target to be treated Termination angle, take the original arc termination angle corresponding to the i+1th target to be treated as the target arc start angle. The absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is not greater than that of the machine corresponding to the i-th target to be treated When the absolute value of the difference between the stand stop angle and the original arc ending angle corresponding to the i+1 target to be treated, keep the arc starting angle and arc ending angle corresponding to the i+1 target to be treated different. The original arc starting angle and the original arc ending angle corresponding to the i+1 target to be treated are taken as the target arc starting angle and target arc ending corresponding to the i+1 target to be treated, respectively. horn. Through the above method, the target arc starting angle corresponding to the i+1 th target to be treated can be made close to the gantry stop angle corresponding to the i th target to be treated, thereby making it possible for the i+1 th target to be treated During the treatment, the starting angle of the gantry is close to the gantry stop angle corresponding to the i-th target to be treated, which shortens the gantry rotation time when switching between two adjacent targets to be treated during radiotherapy, thereby shortening the The entire duration of treatment reduces the missed dose received by the patient.

For better understanding, the following describes the method for determining the starting and stopping angles of arcs provided by the present application in detail with reference to Table 1 and Table 2 through two examples.

In the first example, as shown in Table 1, it is assumed that there are 5 targets to be treated, and a single arc draw is performed for each target to be treated, that is, the number of arc draws of the rack corresponding to each target to be treated Both are 1. The original arc starting angle and original arc ending angle corresponding to each target to be treated are the left and right boundary values of the rack arc range shown in Table 1, respectively. For example, the original arc starting angle and the original arc ending angle of target 1 to be treated are -180 degrees and 180 degrees, respectively, and other targets are similar to those shown in Figure 1, and will not be repeated here.

In this example, the target arc start angle and target arc end angle corresponding to the first target to be treated are -180 degrees and 180 degrees, respectively. Since the number of arcs of the rack is 1, the rack stop angle corresponding to the first target point is the end angle of the target arc, that is, 180 degrees.

Table 1

Target ordering	1	2	3	4	5
start angle to end angle	-180 to 180	180 to -180	90 to -90	-180 to 180	-180 to 180
Angle adjustment	constant	constant	-90 to 90	180 to -180	constant

As shown in Table 1, the original arc starting angle and original arc ending angle corresponding to the second target to be treated are 180 degrees and -180 degrees, respectively. Because the absolute value of the difference between the gantry stop angle (ie 180 degrees) corresponding to the first target to be treated and the original arc starting angle (ie 180 degrees) corresponding to the second target to be treated is not greater than the first The absolute value of the difference between the gantry stop angle (ie 180 degrees) corresponding to the target to be treated and the original arc termination angle (ie -180 degrees) corresponding to the second target to be treated. The original arc starting angle and original arc ending angle corresponding to the target point are used as the corresponding target arc starting angle and target arc ending angle, that is, the left and right boundary values of the rack arc range remain unchanged. (ie 180 degrees to -180 degrees). At this time, the starting angle of the gantry corresponding to the second target to be treated is 180 degrees. The starting angle of the target arc drawing of the second target to be treated coincides with the stop angle of the gantry of the first target to be treated, and the gantry can start the second target to be treated without any idling process The target is undergoing radiotherapy, that is, the gantry rotation time is 0 when switching between targets. In addition, since the number of arcs of the gantry is 1, the gantry stop angle corresponding to the second target to be treated is -180 degrees.

Continue as shown in Table 1, the original arc starting angle and original arc ending angle corresponding to the third target to be treated are 90 degrees and -90 degrees, respectively. Because the absolute value of the difference between the gantry stop angle (ie -180 degrees) corresponding to the second target to be treated and the original arc starting angle (ie 90 degrees) corresponding to the third target to be treated is greater than that of the second target The absolute value of the difference between the gantry stop angle (ie -180 degrees) corresponding to the target to be treated and the original arc termination angle (ie -90 degrees) corresponding to the third target to be treated. The original arc ending angle and the original arc starting angle corresponding to the treatment target are taken as the corresponding target arc starting angle and target arc ending angle, that is, the left and right boundary values of the rack arc range are exchanged ( i.e. -90 degrees to 90 degrees). At this time, the starting angle of the gantry corresponding to the third target to be treated is -90 degrees. The gantry only needs to be idling 90 degrees to start the treatment of the 3rd target to be treated, compared to the situation where the gantry needs 270 degrees to start the treatment of the 3rd target to be treated when no treatment is performed. The idle rotation angle of the gantry when switching from the second target to be treated to the third target to be treated is reduced, thereby shortening the rotation time of the gantry when switching between targets. In addition, since the number of arcs of the gantry is 1, the gantry stop angle corresponding to the third target to be treated is 90 degrees.

In the same manner as above, the gantry start angle and gantry stop angle corresponding to the fourth and fifth target points to be treated can be determined, so that when switching from the third target point to be treated to the fourth target point to be treated and from the third target point to be treated 4. The idle angle of the gantry when the target to be treated is switched to the fifth target to be treated is relatively small, thereby correspondingly shortening the rotation time of the gantry when switching between targets, thereby shortening the time required to complete the five targets to be treated. the duration of treatment and reduce the missed dose received by the patient.

In the second example, as shown in Table 2, it is also assumed that there are 5 targets to be treated, and the original arc starting angle and original arc ending angle corresponding to each target to be treated are shown in Table 2, respectively. The left and right boundary values of the rack draw arc range. Different from the first example, in the second example, the number of gantry arcs performed for each target to be treated is not exactly the same, for example, gantry arcs are performed twice for target 1 to be treated, Target 2 performs 3 arcs of the rack, and the arcs of other targets to be treated are shown in Table 2, which will not be repeated here.

In this example, the same as the first example, the target arc starting angle and the target arc ending angle corresponding to the first target to be treated are -180 degrees and 180 degrees, respectively. However, since the number of arcs of the gantry corresponding to the first target to be treated is 2, the stop angle of the gantry corresponding to the first target is the starting angle of the target arc, ie -180 degrees.

Table 2

Target ordering	1	2	3	4	5
start angle to end angle	-180 to 180	180 to -180	90 to -90	-180 to 180	-180 to 180
Number of arcs	2	3	2	1	1
rack stop angle	-180
Angle adjustment		-180 to 180
rack stop angle		180
Angle adjustment			constant
rack stop angle			90
Angle adjustment				180 to -180

rack stop angle				-180
Angle adjustment					constant

As shown in Table 2, the original arc starting angle and original arc ending angle corresponding to the second target to be treated are 180 degrees and -180 degrees, respectively. Because the absolute value of the difference between the gantry stop angle (ie -180 degrees) corresponding to the first target to be treated and the original arc starting angle (ie 180 degrees) corresponding to the second target to be treated is greater than the first The absolute value of the difference between the gantry stop angle (i.e. -180 degrees) corresponding to the target to be treated and the original arc termination angle (i.e. -180 degrees) corresponding to the second target to be treated. The original arc end angle and original arc start angle corresponding to the treatment target are taken as the corresponding target arc start angle and target arc end angle, that is, the left and right boundary values of the rack arc range are exchanged ( i.e. -180 degrees to 180 degrees). At this time, the starting angle of the gantry corresponding to the second target to be treated is -180 degrees. After adjustment, the starting angle of the gantry corresponding to the second target to be treated coincides with the stop angle of the gantry corresponding to the first target to be treated, and the gantry can start to treat the second target to be treated without any idling process. Compared with the situation where the gantry needs 360 degrees to start radiation therapy on the 2nd target to be treated when no treatment is performed, switching from the 1st target to be treated to the second target can be reduced. The idle rotation angle of the gantry when treating targets, thereby shortening the gantry rotation time when switching between targets. Since the number of arcs of the gantry corresponding to the second target to be treated is 3, the stop angle of the gantry corresponding to the second target is the end angle of the arc of the target, that is, 180 degrees.

Continue as shown in Table 2, the original arc starting angle and original arc ending angle corresponding to the third target to be treated are 90 degrees and -90 degrees, respectively. Because the absolute value of the difference between the gantry stop angle (ie 180 degrees) corresponding to the second target to be treated and the original arc starting angle (ie 90 degrees) corresponding to the third target to be treated is not greater than the second The absolute value of the difference between the gantry stop angle (ie, 180 degrees) corresponding to the target to be treated and the original arc termination angle (ie -90 degrees) corresponding to the third target to be treated. The original arc starting angle and original arc ending angle corresponding to the target point are used as the corresponding target arc starting angle and target arc ending angle, that is, the left and right boundary values of the rack arc range remain unchanged. (ie 90 degrees to -90 degrees). At this time, the starting angle of the gantry corresponding to the third target to be treated is 90 degrees. The gantry only needs to be idling 90 degrees to start the treatment of the third target to be treated. In addition, since the number of arcs of the gantry corresponding to the third target to be treated is 2, the stop angle of the gantry corresponding to the second target to be treated is 90 degrees.

In the same manner as above, the gantry start angle and gantry stop angle corresponding to the fourth and fifth target points to be treated can be determined, so that when switching from the third target point to be treated to the fourth target point to be treated and from the third target point to be treated 4. The idle angle of the gantry when the target to be treated is switched to the fifth target to be treated is small, thereby correspondingly shortening the rotation time of the gantry when switching between targets, thereby shortening the time required to complete the five targets to be treated. the duration of treatment and reduce the missed dose received by the patient.

In addition, since radiation therapy technology uses rays to treat lesions, and the structure of the human body is complex, it is particularly important to ensure the consistency of the position of the rays and the position of the lesions during the treatment process. In order to ensure that the lesion is in a fixed position relative to the radiation during the treatment, the patient needs to be fixed before the treatment. At present, the immobilization of patients is mainly completed by non-invasive positioning technology or invasive positioning technology. When non-invasive positioning technology is used, the gamma angles corresponding to each target to be treated are the same. Directly using the method for determining the starting and stopping angles of arcs for multi-target therapy shown in Figures 1 and 2 can effectively shorten the entire treatment time. Reduce the missed dose to the patient. However. When using invasive positioning technology, the gamma angle corresponding to each target to be treated may be different. When the gamma angles corresponding to the targets to be treated are different, the radiotherapy equipment needs to temporarily adjust the patient position according to the gamma angle corresponding to the next target to be treated after completing the treatment of one target to be treated. The more adjustments, the longer the overall treatment time and the greater the missed dose to the patient.

In order to reduce the number of adjustments, further shorten the entire treatment duration, and reduce the leakage dose received by the patient, based on the embodiment shown in FIG. 2 or FIG. 3 , optionally, in an embodiment of the present application, in the execution of FIG. 2 Before step S201 in the embodiment shown or step S301 in the embodiment shown in FIG. 3 , the method further includes: sorting the N targets to be treated according to the gamma angles corresponding to the N targets to be treated, so that the gamma The same targets to be treated are adjacent to each other.

In a specific implementation manner, before the N targets to be treated are sorted according to the gamma angles corresponding to the N targets to be treated, the positioning modes of the patients are obtained, and the positioning modes of the patients include invasive positioning and non-invasive positioning. When it is determined that the positioning mode of the patient is non-invasive positioning, step S201 in the embodiment shown in FIG. 2 or step S301 in the embodiment shown in FIG. 3 is performed in the order of the initial target points planned in the treatment plan. When it is determined that the positioning mode of the patient is invasive positioning, the N targets to be treated are sorted according to the gamma angles corresponding to the N targets to be treated, so that the targets to be treated with the same gamma angle are adjacent to each other.

For example, the targets to be treated with the same gamma angle may be mentioned above on the basis of the initial ordering of the targets planned in the treatment plan. For ease of understanding, the process is described in detail below with reference to Table 1.

As shown in Table 1, in the initial ranking of targets, the gamma angles corresponding to targets 1 to 5 to be treated are 80 degrees, 90 degrees, 80 degrees, 90 degrees, and 100 degrees, respectively. When sorting, the target to be treated that is the same as the gamma angle of the target to be treated 1 in the initial sorting of the targets is advanced. As shown in Table 1, the target to be treated 3 is advanced. Then, the target to be treated that is the same as the gamma angle of the target to be treated 2 in the initial ordering of the targets is advanced, as in Table 1, the target to be treated 4 is advanced. In a sequential manner, the target points to be treated with the same gamma angle are adjacent to each other in the adjusted target point ordering (also referred to as target point target ordering), thereby reducing the number of adjustments to the patient's position during radiotherapy. , thereby shortening the overall treatment time. After that, the method shown in Fig. 2 or Fig. 3 is used to determine the target arc starting angle and target arc ending angle corresponding to each target to be treated based on the target ordering of the target points, so as to shorten the gantry rotation time when switching between targets. , thereby further shortening the entire treatment time and reducing the missed dose received by the patient.

Corresponding to the method for determining the starting and stopping angles of arcs for multi-target therapy provided by the above-mentioned embodiments, with reference to FIG. The arc start and stop angle determination device 40 includes:

The first determination module 401 is configured to determine the i-th arc-drawing starting angle, the target arc-drawing ending angle, and the rack arc-drawing times corresponding to the i-th target point to be treated among the N target points to be treated. The gantry stop angle corresponding to the target to be treated, wherein i is an integer between 1 and N-1, N is an integer greater than 1, and wherein, when i=1, the i-th target to be treated The target arc starting angle and the target arc ending angle corresponding to the point are respectively the original arc starting angle and the original arc ending angle corresponding to the i-th target point to be treated;

The second determination module 402 is configured to determine the distance between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle and the original arc-ending angle corresponding to the i+1 target to be treated The angle interval is determined, and the target arc starting angle and the target arc ending angle corresponding to the i+1 th target point to be treated are determined.

Optionally, in an embodiment of the present application, the second determining module 402 is specifically configured to:

If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the point and the original arc termination angle corresponding to the i+1 th target to be treated, then the original arc corresponding to the i+1 th target to be treated The starting angle is determined as the target arc end angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the ith +1 target arc starting angle corresponding to the target to be treated.

Optionally, in an embodiment of the present application, the second determining module 402 is specifically configured to:

If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is not greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the target point and the original arc end angle corresponding to the i+1 th target to be treated, then the original pull corresponding to the i+1 th target to be treated is The arc start angle is determined as the target arc starting angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the The target arc end angle corresponding to the i+1th target to be treated.

Optionally, in an embodiment of the present application, the first determining module 401 is specifically configured to:

If the number of arcs of the gantry corresponding to the i-th target to be treated is an even number, the target arc-pulling start angle corresponding to the i-th target to be treated is determined as the i-th target to be treated Corresponding rack stop angle.

Optionally, in an embodiment of the present application, the first determining module 401 is specifically configured to:

If the number of arcs of the rack corresponding to the i-th target to be treated is an odd number, the target arc-pulling termination angle corresponding to the i-th target to be treated is determined as the corresponding to the i-th target to be treated the rack stop angle.

Optionally, in an embodiment of the present application, the device 40 for determining the starting and stopping angles of an arc further includes: a sorting module 403 for, when the positioning mode of the patient is invasive positioning, according to the corresponding N target points to be treated The N target points to be treated are sorted by the gamma angle, so that the targets to be treated with the same gamma angle are adjacent to each other.

Optionally, in an embodiment of the present application, the device 40 for determining the starting and stopping angles of an arc further includes an acquisition module 404 for acquiring a positioning mode of a patient, where the positioning mode of the patient includes invasive positioning and non-invasive positioning; Correspondingly, the sorting module 403 is specifically configured to: when it is determined that the positioning mode of the patient is invasive positioning, classify the N to-be-treated targets according to the gamma angles corresponding to the N to-be-treated targets Targets are sorted.

Optionally, in an embodiment of the present application, the first determining module 401 is further configured to: when it is determined that the positioning mode of the patient is non-invasive positioning, according to the i-th target among the N targets to be treated The starting angle of the target arc drawing, the target arc drawing ending angle and the number of times of arc drawing of the gantry corresponding to the target point to be treated are used to determine the stop angle of the gantry corresponding to the i-th target point to be treated.

The device for determining the starting and stopping angles of arcs provided in this embodiment can be applied in a radiation therapy system to implement the corresponding methods for determining the starting and stopping angles of arcs for multi-target therapy in the foregoing method embodiments, and has a corresponding method. The beneficial effects of the embodiments are not repeated here. In addition, for the function realization of each module in the device for determining the starting and stopping angles of arcs in this embodiment, reference may be made to the descriptions of the corresponding parts in the foregoing method embodiments, and details are not repeated here.

Corresponding to the method for determining the arc start and stop angle for multi-target therapy provided by the above-mentioned embodiment, referring to FIG. 5 , the embodiment of the present application also provides an electronic device 50 for executing the method provided by any method embodiment of the present application. A method for determining the starting and stopping angles of arcs for multi-target therapy. As shown in FIG. 5 , the electronic device 50 provided in this embodiment may include a processor 501 and a memory 502, where program instructions are stored in the memory 502, and the processor 501 is configured to call the program instructions in the memory 502 to execute any method of the present application The embodiment provides a method for determining the starting and ending angles of arcs for multi-target therapy.

The processor 501 may include a central processing unit (CPU, single-core or multi-core), a graphics processing unit (GPU), a microprocessor, an application-specific integrated circuit (ASIC), a digital signal processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, or multiple integrated circuits used to control program execution.

Memory 502 may include Read-Only Memory (ROM) or other types of static storage devices that can store static information and instructions, Random Access Memory (RAM), or other types of information and instructions that can be stored The dynamic storage device can also include Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Access any other medium without limitation. The memory 502 can be set independently or integrated with the processor 501 .

In a specific implementation, as an embodiment, the processor 501 may include one or more CPUs. In a specific implementation, as an embodiment, the above-mentioned electronic device 70 may include multiple processors. Each of these processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

For the specific execution process of the electronic device 70, reference may be made to any method embodiment of the present application, and the implementation principle and technical effect thereof are similar, and details are not described herein again in this embodiment.

An embodiment of the present application provides a computer storage medium, where the computer storage medium stores a computer program, the computer program includes program instructions, and the program instructions are configured to, when executed by a processor, cause the processor to execute the functions provided by any method embodiment of the present application. Determination method of arc start and stop angle for multi-target therapy. Its working principle and effect are similar, and will not be repeated here.

As will be appreciated by those skilled in the art, embodiments of the present disclosure may be provided as a method, an apparatus (apparatus), or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. The computer program is stored/distributed in a suitable medium, provided with or as part of other hardware, or may take other forms of distribution, such as over the Internet or other wired or wireless telecommunication systems.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (apparatus) and computer program products of embodiments of the present disclosure. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (18)

1. A method for determining the starting and stopping angles of arcs for multi-target therapy, comprising:

   Determine the machine corresponding to the ith target to be treated according to the target arc starting angle, the target arc ending angle and the number of rack arcs corresponding to the ith target to be treated among the N targets to be treated The stand stop angle, where i is an integer between 1 and N-1, and N is an integer greater than 1, and where, when i=1, the target arc starting corresponding to the i-th target to be treated The angle and the target arc ending angle are respectively the original arc starting angle and the original arc ending angle corresponding to the i-th target to be treated;

   According to the angular interval between the gantry stop angle corresponding to the i-th target to be treated and the original arc-drawing start angle and original arc-drawing end angle corresponding to the i+1-th target to be treated, determine the The target arc start angle and target arc end angle corresponding to the i+1 target points to be treated.
2. The method for determining the starting and stopping angle of arc drawing according to claim 1, wherein the original drawing angle corresponding to the i+1th target point to be treated is based on the gantry stop angle corresponding to the ith target point to be treated. The angular interval between the arc start angle and the original arc end angle, determine the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, including:

   If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the point and the original arc termination angle corresponding to the i+1 th target to be treated, then the original arc corresponding to the i+1 th target to be treated The starting angle is determined as the target arc end angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the ith +1 target arc starting angle corresponding to the target to be treated.
3. The method for determining the starting and stopping angles of the drawing arc according to claim 2, wherein, according to the gantry stop angle corresponding to the i-th target to be treated and the original drawing corresponding to the i+1-th target to be treated The angular interval between the arc start angle and the original arc end angle, determine the target arc start angle and target arc end angle corresponding to the i+1th target to be treated, including:

   If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is not greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the target point and the original arc end angle corresponding to the i+1 th target to be treated, then the original pull corresponding to the i+1 th target to be treated is The arc start angle is determined as the target arc starting angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the The target arc end angle corresponding to the i+1th target to be treated.
4. The method for determining the starting and stopping angle of arc drawing according to claim 1, wherein the starting angle of arc drawing and the ending angle of target arc drawing corresponding to the i-th target point to be treated among the N target points to be treated and the number of arcs of the gantry to determine the gantry stop angle corresponding to the i-th target to be treated, including:

   If the number of arcs of the gantry corresponding to the i-th target to be treated is an even number, the target arc-pulling start angle corresponding to the i-th target to be treated is determined as the i-th target to be treated Corresponding rack stop angle.
5. The method for determining the starting and ending angles of arcing according to claim 4, wherein the starting angle of arcing and the ending angle of arcing according to the target point corresponding to the ith target point to be treated among the N target points to be treated and the number of arcs of the gantry to determine the gantry stop angle corresponding to the i-th target to be treated, including:

   If the number of arcs of the rack corresponding to the i-th target to be treated is an odd number, the target arc-pulling termination angle corresponding to the i-th target to be treated is determined as the corresponding to the i-th target to be treated the rack stop angle.
6. The method for determining the starting and stopping angle of arc drawing according to claim 1, wherein the starting angle of arc drawing and the ending angle of target arc drawing corresponding to the i-th target point to be treated among the N target points to be treated and the number of arcs of the gantry, before determining the gantry stop angle corresponding to the i-th target to be treated, it also includes:

   The N targets to be treated are sorted according to the gamma angles corresponding to the N targets to be treated, so that the targets to be treated with the same gamma angle are adjacent to each other.
7. The method for determining the starting and stopping angles of an arc according to claim 6, wherein before sorting the N targets to be treated according to the gamma angles corresponding to the N targets to be treated, the method further comprises: Obtain the positioning mode of the patient, the positioning mode of the patient includes invasive positioning and non-invasive positioning;

   Correspondingly, the sorting of the N targets to be treated according to the gamma angles corresponding to the N targets to be treated includes: when it is determined that the positioning mode of the patient is invasive positioning, according to the N targets The N to-be-treated targets are sorted by gamma angles corresponding to the N to-be-treated targets.
8. The method for determining the starting and stopping angles of an arc according to claim 7, further comprising: when it is determined that the positioning mode of the patient is non-invasive positioning, executing the i-th target to be treated according to the N target points to be treated. The step of determining the gantry stop angle corresponding to the i-th target point to be treated corresponds to the target arc starting angle, the target arc ending angle and the number of times of the gantry arc corresponding to the treatment target.
9. A device for determining the starting and stopping angles of arcs for multi-target therapy, comprising:

   The first determination module is configured to determine the i-th arc-drawing starting angle, the target arc-drawing ending angle, and the rack arc-drawing times corresponding to the i-th target point to be treated among the N target points to be treated. The gantry stop angle corresponding to the target to be treated, wherein i is an integer between 1 and N-1, and N is an integer greater than 1, and wherein, when i=1, the i-th target to be treated The corresponding target arc starting angle and target arc ending angle are respectively the original arc starting angle and the original arc ending angle corresponding to the i-th target to be treated;

   The second determination module is configured to determine the difference between the gantry stop angle corresponding to the ith target to be treated and the original arc starting angle and the original arc ending angle corresponding to the i+1 target to be treated The angle interval is to determine the target arc starting angle and the target arc ending angle corresponding to the i+1 th target point to be treated.
10. The arc start-stop angle determination device according to claim 9, wherein the second determination module is specifically used for:

    If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the point and the original arc termination angle corresponding to the i+1 th target to be treated, then the original arc corresponding to the i+1 th target to be treated The starting angle is determined as the target arc end angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the ith +1 target arc starting angle corresponding to the target to be treated.
11. The arc start-stop angle determination device according to claim 10, wherein the second determination module is specifically used for:

    If the absolute value of the difference between the gantry stop angle corresponding to the i-th target to be treated and the original arc starting angle corresponding to the i+1-th target to be treated is not greater than the i-th target to be treated The absolute value of the difference between the gantry stop angle corresponding to the target point and the original arc end angle corresponding to the i+1 th target to be treated, then the original pull corresponding to the i+1 th target to be treated is The arc start angle is determined as the target arc starting angle corresponding to the i+1th target to be treated, and the original arc end angle corresponding to the i+1th target to be treated is determined as the The target arc end angle corresponding to the i+1th target to be treated.
12. The arc start-stop angle determination device according to claim 10 or 11, wherein the first determination module is specifically used for:

    If the number of arcs of the gantry corresponding to the i-th target to be treated is an even number, the target arc-pulling start angle corresponding to the i-th target to be treated is determined as the i-th target to be treated Corresponding rack stop angle.
13. The arc start-stop angle determination device according to claim 10 or 11, wherein the first determination module is specifically used for:

    If the number of arcs of the rack corresponding to the i-th target to be treated is an odd number, the target arc-pulling termination angle corresponding to the i-th target to be treated is determined as the corresponding to the i-th target to be treated the rack stop angle.
14. The device for determining the starting and stopping angles of an arc drawing according to claim 9, further comprising: a sorting module, configured to perform a sorting operation on the N target points to be treated according to the gamma angles corresponding to the N target points to be treated Ordered so that the targets to be treated with the same gamma angle are adjacent.
15. The arc start-stop angle determination device according to claim 14, further comprising: an acquisition module for acquiring a positioning mode of a patient, wherein the positioning mode of the patient includes invasive positioning and non-invasive positioning;

    Correspondingly, the sorting module is specifically configured to: when it is determined that the positioning mode of the patient is invasive positioning, sorting the N targets to be treated according to the gamma angles corresponding to the N targets to be treated .
16. The arc starting and stopping angle determination device according to claim 15, wherein the first determination module is further configured to: when it is determined that the positioning mode of the patient is non-invasive positioning, according to the N target points to be treated The starting angle of the target arc drawing, the target arc drawing ending angle and the number of times of arc drawing of the gantry corresponding to the ith target point to be treated are determined, and the stop angle of the gantry corresponding to the ith target point to be treated is determined.
17. An electronic device, characterized in that the electronic device comprises a memory and a processor, wherein program instructions are stored in the memory, and the processor is configured to call the program instructions in the memory to execute the method according to claim 1- The method for determining the starting and stopping angle of arc drawing according to any one of 8.
18. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and the computer program includes program instructions configured to cause the processing when executed by a processor The device executes the method for determining the starting and stopping angles of arcing according to any one of claims 1-8.

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