CN105636330B - Accelerating tube and its control method accelerate tube controller and radiotherapy system - Google Patents
Accelerating tube and its control method accelerate tube controller and radiotherapy system Download PDFInfo
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- CN105636330B CN105636330B CN201410608487.1A CN201410608487A CN105636330B CN 105636330 B CN105636330 B CN 105636330B CN 201410608487 A CN201410608487 A CN 201410608487A CN 105636330 B CN105636330 B CN 105636330B
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Abstract
Accelerating tube and its control method accelerate tube controller and radiotherapy system.The accelerating tube includes at least three accelerating cavities, it is of coupled connections by coupler between each adjacent accelerating cavity, first switch component is provided at least one coupler, the first switch component is suitable for opening or closing the coupler, and it is provided between the adjacent acceleration cavities that are connected of the coupler for being provided with first switch component suitable for penetrating through the adjacent acceleration cavities for the power coupling channel that direct-coupling transmits between the adjacent acceleration cavities, the coupling channel is parallel to the beam channel of the accelerating tube, it is differed with the position of the coupler and relative to the accelerating cavity non-centrosymmetry being connected to, second switch component is provided on the coupling channel, the second switch component is suitable for opening or closing the coupling channel.Using said program, the electron beam of different-energy can be obtained, and simple in structure.
Description
Technical field
The present invention relates to field of medical device, and in particular to a kind of accelerating tube and its control method, accelerate tube controller and
Radiotherapy system.
Background technology
Accelerating tube is the critical component of accelerator, its handle is accelerated to from electron gun injected electrons under rf electric field effect
High energy finally practices shooting and generates sigmatron.According to the difference for the mode for accelerating electronics, accelerating tube is divided into travelling wave accelerating tube and stays
Two kinds of wave accelerating tube.
Image-guided radiotherapy (Image Guide Radiation Therapy, IGRT) is a kind of radiotherapy skill
Art has a wide range of applications in field of radiation therapy.Using accelerator, that is, IGRT accelerators of IGRT technologies.
IGRT accelerator generally use resident wave accelerating pipes accelerate electronics.At work, KV level can both be generated
Electron beam, the electron beam of megavolt grade can also be generated.The electron beam of the wherein described KV level is beaten in the IGRT accelerators
It is imaged on target, the X-ray for imaging can be generated.The electron beam of described megavolt of grade can be used for the lesion of patient's body into
Row radiotherapy.Wherein, the electron beam of the KV level and the electron beam of described megavolt of grade both can be by putting with same
The i.e. homologous IGRT accelerators generation of the IGRT accelerators in source is penetrated, can also be produced by the IGRT accelerators with different radioactive sources
It is raw.
Therefore, the IGRT accelerators can be not only used for radiotherapy, can also be right before the treatment or in therapeutic process
The lesion or normal organ of patient's body are monitored, by the image of generation come guided radiation treatment, it is possible to reduce due to
The error of radiotherapy caused by the reasons such as lesion movement.
Currently, some homologous IGRT accelerating tubes, although can reach certain image quality, implementation method is more complex.
In general, existing accelerating tube is difficult to obtain the electron beam of different-energy by simple structure.
Invention content
The embodiment of the present invention solves the problems, such as to include one of following：How to realize that a kind of structure is simpler and energy
The more extensive or big energy level distributed area accelerating tube of distribution.
To solve the above problems, the embodiment of the present invention provides a kind of accelerating tube, the accelerating tube includes at least three acceleration
Chamber is of coupled connections between each adjacent accelerating cavity by coupler, first switch component, institute is provided at least one coupler
It states first switch component to be suitable for opening or closing the coupler, and the coupler for being provided with the first switch component is connected
Adjacent acceleration cavities between be provided with it is straight between the adjacent acceleration cavities for power suitable for penetrating through the adjacent acceleration cavities
The coupling channel that coupling is transmitted is connect, the coupling channel is parallel to the beam channel of the accelerating tube, the position with the coupler
It sets and differs and relative to the accelerating cavity non-centrosymmetry being connected to, second switch component is provided on the coupling channel,
The second switch component is suitable for opening or closing the coupling channel.
Specifically, when the first switch component opens the coupler being arranged between each adjacent accelerating cavity, and described
When two switch blocks close the coupling channel being arranged between each accelerating cavity, generated in the accelerating cavity of arbitrary neighborhood in the accelerating tube
The electric field of field strength reverse phase, and when the second switch component opens a coupling channel, and first switch component closing
When the coupler being arranged between two accelerating cavities of the coupling channel perforation, generated in the accelerating cavity of the coupling channel perforation
Electric field of the field strength with phase.
Optionally, the first switch component and second switch component at least one be short bar.
Optionally, the coupler is side-coupled cavity.
Optionally, the position of the coupling channel is configured to associated with energy needed for the accelerating tube acceleration is arranged.
Optionally, the coupling channel is arranged in described two accelerating cavity cavity walls apart from nearest position.
To solve the above problems, the embodiment of the present invention additionally provides a kind of radiotherapy system, the system comprises acceleration
Device and the controller coupled with the accelerator, wherein：
The accelerator includes：Electron gun and the accelerating tube being connect with the electron gun, the accelerating tube are above-mentioned implementation
Any accelerating tube described in example；
The controller is suitable for, according to the instruction of the control accelerating tube operating mode received, controlling corresponding position
The field strength phase of accelerating cavity internal electric field.
Optionally, the controller is suitable for when receiving the instruction accelerating tube and being operated in the instruction of first mode, control
The first switch component and second switch component are made, to open the coupler being arranged between each adjacent accelerating cavity, is closed each
The coupling channel being arranged between accelerating cavity so that generate the electricity of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood
；And suitable for when receiving the instruction accelerating tube and being operated in the instruction of second mode, control the first switch component and
Second switch component, to open a coupling channel, and be arranged between two accelerating cavities of the closing coupling channel perforation
Coupler so that generate electric field of the field strength with phase in the accelerating cavity of the coupling channel perforation.
To solve the above problems, the embodiment of the present invention additionally provides a kind of acceleration tube controller, the accelerating tube is above-mentioned
Any accelerating tube described in the embodiment of the present invention, the acceleration tube controller include：
Instruction reception unit is suitable for receiving the instruction for controlling the accelerating tube operating mode；
First control unit, suitable for when receiving the instruction accelerating tube and being operated in the instruction of first mode, controlling institute
First switch component and the second switch component are stated, to open the coupler being arranged between each adjacent accelerating cavity, is closed each
The coupling channel being arranged between accelerating cavity so that generate the electricity of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood
；
Second control unit, suitable for when receiving the instruction accelerating tube and being operated in the instruction of second mode, controlling institute
First switch component and the second switch component are stated, to open a coupling channel, and closes the coupling channel perforation
The coupler being arranged between two accelerating cavities so that generate electric field of the field strength with phase in the accelerating cavity of the coupling channel perforation.
To solve the above problems, the embodiment of the present invention additionally provides a kind of accelerating tube control method, the accelerating tube is upper
Any accelerating tube described in the embodiment of the present invention is stated, the control method includes：
Receive the instruction for controlling the accelerating tube operating mode；
When receiving the instruction accelerating tube and being operated in the instruction of first mode, the first switch component and institute are controlled
Second switch component is stated, to open the coupler being arranged between each adjacent accelerating cavity, closes the coupling being arranged between each accelerating cavity
Close channel so that generate the electric field of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood；
When receiving the instruction accelerating tube and being operated in the instruction of second mode, the first switch component and institute are controlled
Second switch component is stated, to open a coupling channel, and is arranged between two accelerating cavities of the closing coupling channel perforation
Coupler so that electric field of the field strength with phase is generated in the accelerating cavity of coupling channel perforation.
Compared with prior art, the technical solution of the embodiment of the present invention has the following advantages：
By between the different accelerating cavities in accelerating tube, choosing coupler or coupling channel as needed, and pass through
Set switch block controls opening or closing for corresponding coupler or coupling channel in coupler or coupling channel, to control
The field strength phase of electric field in the adjacent acceleration cavities that the coupler or coupling channel are connected to, and then pass through in control electric field
The state of the acceleration or deceleration of electron beam may finally obtain the electron beam of different-energy as needed, to be added using one
Fast pipe can meet the different demands of user.Also, compared to existing accelerating tube, above-mentioned accelerating tube structure is simpler, more
It is user-friendly.
Description of the drawings
Fig. 1 is cross-sectional view when accelerating tube in the embodiment of the present invention is in the first operating mode；
Fig. 2 is cross-sectional view when accelerating tube in the embodiment of the present invention is in the second operating mode；
Fig. 3 is that the accelerating tube in the embodiment of the present invention is in distribution map of the electric field when the first operating mode in each accelerating cavity；
Fig. 4 is that the accelerating tube in the embodiment of the present invention is in distribution map of the electric field when the second operating mode in each accelerating cavity；
Fig. 5 is the structural schematic diagram of the radiotherapy system in the embodiment of the present invention；
Fig. 6 is the accelerating tube controller architecture schematic diagram in the embodiment of the present invention；
Fig. 7 is the accelerating tube control method flow chart in the embodiment of the present invention.
Specific implementation mode
As previously mentioned, existing accelerating tube is difficult to obtain the electron beam of different-energy by simple structure.For example, mesh
Before, in some homologous accelerators, accelerating tube is divided into two parts, a portion is another for obtaining best electron beam
Adjustable phase shifter and power attenuator are set in part, for changing the energy of the best electron beam, so as to reach
Certain image quality, but due to the increase of adjustable phase shifter and power attenuator so that the homologous IGRT accelerators are realized
It is more complex.
In view of the above-mentioned problems, an embodiment of the present invention provides a kind of accelerating tube, the accelerating tube can be as needed, work
In different operating modes.Specifically, by between the different accelerating cavities in accelerating tube, coupler is chosen as needed
Or for the power coupling channel that direct-coupling transmits between the adjacent acceleration cavities, and by coupler or coupling channel
Set switch block controls opening or closing for corresponding coupler or coupling channel, logical to control the coupler or coupling
The field strength phase of electric field in the adjacent acceleration cavities that road is connected to, and then control the acceleration or deceleration of the electron beam passed through in electric field
State, the electron beam of different-energy may finally be obtained as needed, meet the corresponding demand of user.Such as：Described it will add
Speed pipe by multistage in IGRT accelerators, in the case where the accelerating tube is operated in lasting acceleration pattern, accelerating, can obtain million
The electron beam of grade is lied prostrate, radiotherapy is used for；And when under deceleration mode after the accelerating tube works formerly acceleration, then it can obtain
The electron beam of KV level leads to for before the treatment or in therapeutic process, being monitored to the lesion or normal organ of patient's body
Cross the image generated and carry out guided radiation treatment, reduce due to lesion movement etc. caused by radiotherapy error.It can be with
Understand, as needed, the accelerating tube there can also be other operating modes, for example, being realized by the way that multigroup switch is arranged
First accelerate intermediate reduction gear finally acceleration etc..
In specific implementation, the accelerating tube includes at least three accelerating cavities.Wherein, each adjacent accelerating cavity passes through coupling
Chamber is of coupled connections, and the adjacent accelerating cavity of any two can be used as one group of accelerating cavity, and in embodiments of the present invention, at least one set adds
It is additionally provided with coupling channel between fast chamber.
To make the accelerating tube that there is different operating modes, first switch portion can be set at least one coupler
Part, and the is provided on the coupling channel between the adjacent acceleration cavities for the coupler connection for being provided with first switch component described
Two switch blocks.In other words, the first switch component and second switch component are separately positioned between two adjacent accelerating cavities,
It is arranged in the different and asymmetric positions of two accelerating cavity.In this way, by controlling first switch component and second switch portion
Part, you can opening or closing for coupler and coupling channel is determined respectively, to control the electric field strength phase in corresponding accelerating cavity
Position, and then the energy of the electron beam of process can be changed, to obtain the electron beam of required energy.Also, the present invention is implemented
For accelerating tube in example in the electron beam of energy required for acquisition, structure is simpler, thus cost is lower, more convenient user
Use.
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment explain in detail.
Sectional structure chart of the accelerating tube in the embodiment of the present invention shown in -2 under different working modes referring to Fig.1, with
And each accelerating cavity internal electric field distribution map of different working modes is corresponded to shown in Fig. 3-4.Wherein, Fig. 3 is in the embodiment of the present invention
Accelerating tube operating mode shown in Fig. 1 under distribution map of the electric field, in Fig. 3 and Fig. 4, abscissa indicate on beam direction respectively plus
The physical length of fast chamber, ordinate indicate the electric field strength in each accelerating cavity.Wherein, the electric-field intensity distribution in each accelerating cavity
Related to the position in accelerating cavity, the electric field intensity value in each accelerating cavity at entrance and exit is 0.If adjacent two add
In fast chamber, the electric field intensity value in one of accelerating cavity is more than or equal to 0, and the electric field intensity value in another accelerating cavity is less than etc.
In 0, then the direction of an electric field reverse phase in adjacent two accelerating cavity.
As shown in Figs 1-4, the embodiment provides a kind of accelerating tubes 10.In an IGRT accelerators, accelerating tube
10 can couple with the electron gun (not shown) for generating electron beam.In specific implementation, the accelerating tube 10 may include at least
Three accelerating cavities are connected by coupler between the adjacent accelerating cavity of any two.Pass through electromagnetic coupling between the accelerating cavity
Form beam channel 130.It is exported after the beam channel 130 formed between the accelerated chamber of electron beam that electron gun generates.Specific
In implementation, the position of the coupler can be arranged as required to.More preferably, as shown, the coupler can be side coupling
Close chamber.
As illustrated in fig. 1 and 2, the accelerating tube may include accelerating cavity 1101~1107, and with two institutes of arbitrary neighborhood
The coupler 1201~1206 of accelerating cavity connection is stated, coupler 1201~1206 here is side-coupled cavity.A and b points of arrow
Do not indicate the electric field strength phase at beam channel 130 in corresponding accelerating cavity, the field distribution of other positions can in accelerating cavity
With referring to the field distribution schematic diagram of each accelerating cavity in Fig. 3 and Fig. 4.
Wherein, first switch component is provided at least one coupler, as illustrated in fig. 1 and 2, in coupler 1203
First switch component 1207 is set, and the first switch component 1207 is suitable for opening or closing the coupler 1203.
And in embodiments of the present invention, the adjacent acceleration cavities that the coupler for being provided with first switch component is connected to it
Between be additionally provided with coupling channel, the coupling channel differs with the position of the coupler and relative to the accelerating cavity being connected to
Non-centrosymmetry.Second switch component is provided on the coupling channel, the second switch component is suitable for opening or closing
The coupling channel.As illustrated in fig. 1 and 2, coupling channel 11 is provided between the accelerating cavity 1103 and accelerating cavity 1104, it is described
The second switch component 140 of the coupling channel 11 can be opened or closed by being provided on coupling channel 11.
It describes in detail below in conjunction with the operation principle of the accelerating tube in Fig. 1-4 pairs of embodiment of the present invention：
It will be understood by those skilled in the art that can be changed entrained by electron beam by the electric field formed in accelerating cavity
Energy.For example, in an embodiment of the present invention, IGRT accelerators include power source (not shown).The power source is to acceleration
Feed-in power in pipe 10, and then electric field is formed in accelerating cavity, distribution of the electric field in accelerating cavity can change electron beam and be taken
The energy of band.
Under normal conditions, all cavitys all resonance is in a frequency in synchronization, accelerating tube, adjacent two accelerating cavity
Interior electric field phase differs 180 °, i.e., the electric field strength reverse phase in adjacent acceleration cavities, the time that electronics is leaped in a chamber is t=
D/v, wherein v is flying speed, and t is equal to the half period of electromagnetism field oscillation in accelerating tube, and the distance between adjacent acceleration cavities is D, electricity
The flight time and acceleration fields of son replace accelerated when direction time consistency makes electronic beam current reach each cavity, realization electricity
Beamlet persistently accelerates along beam direction.
In an embodiment of the present invention, by controlling first switch component and second switch component, can make each adjacent
The coupler being arranged between accelerating cavity is opened, and the coupling channel being arranged between each accelerating cavity is closed, so that appointing in accelerating tube
The electric field strength reverse phase anticipated in two adjacent accelerating cavities, as shown in figure 3, the field distribution in accelerating cavity can generate electron gun
Electron beam persistently accelerate along beam direction.For example, the time of electron transit accelerating tube unit accelerating gap is equal to microwave resonance
Half period, when electronics is on the acceleration field phase (such as 0, π) of accelerating cavity, adjacent electric field direction is on the contrary, electricity in accelerating cavity
Son is acted on by lasting accelerating field, and final accelerating cavity can generate the electron beam of megavolt grade.
In order to obtain the lower electron beam of energy, such as the preferable KV level electricity of acquisition image quality using the accelerating tube
The coupling channel that second switch component is provided in accelerating tube can be opened, the coupling channel is penetrated through by beamlet
Two accelerating cavities between be provided with first switch component coupler close so that energy passes through open coupling channel
To front transfer, since the coupling channel directly penetrates through described two adjacent accelerating cavities so that the two generally forms one
A accelerating cavity, therefore the electric field between two accelerating cavities of script electric field reverse phase for being of coupled connections of the coupling channel opened becomes
For same phase, for convenience of description, the two adjacent accelerating cavities are known as one group of accelerating cavity, and pass through after electron beam with described one
Electric field strength phase in the adjacent accelerating cavity of group accelerating cavity, connection is coupled between accelerating cavity shown in FIG. 1 by coupler
State compare, sequence invert, and with the electric field reverse phase in adjacent acceleration cavities.When electron beam passes through the accelerating tube, by
Electric field between the adjacent accelerating cavity initially passed through is reverse phase, therefore can persistently be accelerated under the action of electric field,
But when two accelerating cavities of the coupling channel perforation Jing Guo the opening, due to the same phase of electric field in the two accelerating cavities,
It can reduce speed now, and continued deceleration under the action of subsequent inverter electric field, it is hereby achieved that the lower electron beam of energy level.
With reference to Fig. 2 and Fig. 4, control first switch component 1207 and second switch component 140, by accelerating cavity 1103 and therewith
Coupler 1203 between adjacent accelerating cavity 1104 is closed, while coupling channel 11 between the two being opened, you can is changed
Electric field strength phase in accelerating cavity 1104~1107, therefore change the acceleration direction of the electron beam passed through.
By taking the beam direction of electron beam is the directions a as an example.The electron beam that the electron gun generates is logical by line along the directions a
Road 130.When the electron beam passes through accelerating cavity 1101~1103, due to the field strength reverse phase of adjacent two electric field, electron transit accelerates
The time of pipe unit accelerating gap is equal to the half period of microwave resonance, therefore can carry out continuing acceleration to the electron beam, makes
The energy that the electron beam carries is obtained to increase.And the electron beam pass through the accelerating cavity 1104 when, due in accelerating cavity 1104
Phase and the electric field in accelerating cavity 1103 the same phase of field strength, thus passed through electron beam is caused to subtract since accelerating cavity 1104
Speed, in synchronization, each accelerating cavity internal electric field field strength distribution is as shown in figure 4, after autoacceleration chamber 1104, in adjacent two accelerating cavity
Electric field field strength reverse phase, thus can make continued deceleration after the electron beam autoacceleration chamber 1104.
It should be noted that when the coupling channel for being provided with second switch component is opened, along particle acceleration direction, can
Cause the same phase of field strength of the electric field in next adjacent accelerating cavity in communication, and causes follow-up adjacent each accelerating cavity therewith
In electric field strength reverse phase.
In an embodiment of the present invention, the energy for the electron beam that electron gun generates is 15keV, and speed is the 24% of the light velocity,
After accelerating cavity 1101 to accelerating cavity 1103, the speed of electron beam increases to 98% of the light velocity or more, at this time corresponding energy
For 2MeV or more, and after accelerating cavity 1104 to accelerating cavity 1107, the speed of electron beam is reduced to the 86% of the light velocity, right at this time
The energy answered is about 500keV, and energy can obtain preferable image quality for the electron beam within the scope of 500keV.
In an alternative embodiment of the invention, when electron beam injects accelerating cavity from electron gun, kinetic energy is about 10~40keV,
The speed of electronics is about v=0.17~0.37c, and c is the light velocity；After accelerating cavity 1101 to accelerating cavity 1103, electron beam can quilt
1~2MeV is accelerated to, velocity of electrons reaches v=0.94~0.98c；And after accelerating cavity 1104 to accelerating cavity 1107, electronics
The energy of beam is reduced to 200~500keV, and velocity of electrons is decelerated to v=0.69~0.86c, and energy is in keV magnitudes
Electron beam can obtain preferable image quality.
It is understood that in specific implementation, be used to be imaged in addition to can be used for generating KV level electronic beam current, and megavolt
Grade high energy beam current is used for radiotherapy, and the accelerator in above-described embodiment also can be used for generating the difference for being applicable to multi gear energy
The electronic beam current for the treatment of mode is suitable for middle energy treatment mode, generates for example, a kind of electronic beam current generated is 14 megavolts of grades
Another electron beam be 6 megavolts of grades or lower energy, be suitable for low energy treatment mode.
It should be noted that in specific implementation, it as needed, can also be between any other two adjacent accelerating cavities
The coupling channel for penetrating through the adjacent acceleration cavities is set, and setting is suitable for described in opening and closing in set coupling channel
The second switch component of coupling channel, while any one or more or all couplings between coupler 1201~1206
First switch component is arranged in intracavitary, using mode same as previous embodiment, is opened by controlling first switch component and second
Component is closed, the electron beam of required energy is generated, repeats no more.
As shown in the above, the accelerating tube in the embodiment of the present invention, according to the actual physics parameter of the accelerating tube with
And actual needs, by adjusting in the first switch component and corresponding coupling channel in the coupler between a certain group of accelerating cavity
The on off state of second switch component, can control the field strength phase of the electric field generated in accelerating cavity, and then can adjust acceleration
The energy that electron beam caused by device carries.For the IGRT accelerators in the embodiment of the present invention, according to accelerating cavity in accelerating tube
Quantity and each accelerating cavity in electric field strength, position of the coupling channel in entire accelerating tube is rationally set, you can with
The electron beam of energy needed for obtaining, realizes the various applications such as image supervisory control or treatment.
It should be noted that in specific implementation, the position of the set coupling channel between two adjacent acceleration cavities
Set can as needed needed for energy level size be configured, that is to say, that the position of the coupling channel may be configured to
The accelerating tube, which is arranged, accelerates required energy to be associated.For example, can be formed in parallel on the side wall of two adjacent accelerating cavities
The through-hole of beam channel, as coupling channel.In an embodiment of the present invention, the maximum field in accelerating cavity is arranged in coupling channel
Near position, that is, it is arranged in adjacent acceleration cavities cavity wall near nearest position.The pore size of through-hole can also be according to adding
Fast pipe frequency and the size of required energy are configured.For example, as needed, the shape in the through-hole aperture section can be set
It is set to round, ellipse or " kidney type " etc. toward some recess of side.In an embodiment of the present invention, the coupling channel is logical
The pore size in hole can be 3~6mm.Length is between 20~60 degree.It is understood that coupling channel is located proximate to electricity
Sub- rifle (line inlet), the output energy of final line will be lower；The position of coupling channel is far from electron gun (stream outlet
Place), the final beam energy of line can be higher.For the accelerating tube of a N number of accelerating cavity in total, average energy gain E adds
The acquisition energy of fast pipe exit line is then E (N-2N1), and wherein N1 is the number of the accelerating cavity after the coupling channel.
In specific implementation, it may be other structures that the first switch component 1207, which can be short bar, as long as institute
The coupler at place can be connected to or disconnect by stating first switch component 1207.
In specific implementation, it may be other structures that the second switch component 140, which can be short bar, as long as described
Second switch component 140 can open or close coupling channel.
As shown in figure 5, the embodiments of the present invention also provide a kind of radiotherapy system, the system comprises above-mentioned to add
Fast device 510 and the controller 520 coupled with the accelerator 510.The accelerator 510 may include：Electron gun and with
The accelerating tube of the electron gun connection.Wherein, the accelerating tube in above-described embodiment may be used in the accelerating tube.
In specific implementation, it is referred to the above-mentioned description to Fig. 1 to accelerating tube shown in Fig. 2 and implements the accelerator
510, details are not described herein again.
In specific implementation, the controller 520 can both control the electron beam that the accelerator 510 generates KV level,
The electron beam that the accelerator 510 generates megavolt grade can be controlled again.
When the controller 520 controls the electron beam of the generation megavolt grade of the accelerator 510, the accelerating tube can be controlled
It is of coupled connections by coupler between the accelerating cavity of interior arbitrary neighborhood, so that the electric field strength in the accelerating cavity of arbitrary neighborhood
Reverse phase, as shown in Figure 3 so that the electron beam that the accelerating cavity can generate electron gun accelerates, and the electron beam obtains
After corresponding energy, it can be used for radiotherapy.
When the controller 520, which controls the accelerator 510, generates the electron beam of KV level, the controller 520 can
Two adjacent accelerating cavities to control the accelerating tube generate the electric field with phase.It is generated with phase electric field due to being removed in accelerating tube
Accelerating cavity outside two accelerating cavities, therefore can be according to accelerating cavity in accelerating tube with the direction of an electric field reverse phase in adjacent accelerating cavity
Quantity and each accelerating cavity in electric field strength, adjustment generates position of two accelerating cavities in entire accelerating tube with phase electric field
It sets, to obtain the preferable electron beam of the lower image quality of energy, the electron beam exported in such cases can be used to improve
Image quality.
In an embodiment of the present invention, it is provided with first switch component at least one coupler, is provided with described
The coupling suitable for penetrating through the two accelerating cavities is provided between two adjacent acceleration cavities that the coupler of first switch component is connected to
Channel, and suitable for opening and closing the second switch component of the coupling channel, according to the physical parameter of the accelerator 510
And actual demand, the controller 520 can control the first switch component in accelerator 510 in corresponding coupler and couple logical
Opening or closing for second switch component in road, generates the electron beam of appropriate energy.
In specific implementation, the controller 520 is suitable for the finger according to the control accelerating tube operating mode received
It enables, controls the field strength phase of the accelerating cavity internal electric field of corresponding position.For example, in an embodiment of the present invention, the controller 520
Suitable for when receiving the instruction accelerator 510 and being operated in the instruction of first mode, controlling the first switch component and the
It is logical to close the coupling being arranged between each accelerating cavity to open the coupler being arranged between each adjacent accelerating cavity for two switch blocks
Road so that generate the electric field of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood；And receive instruction institute suitable for working as
When stating accelerator 510 and being operated in the instruction of second mode, the first switch component and second switch component are controlled, to open one
A coupling channel, and close the coupler being arranged between two accelerating cavities of the coupling channel perforation so that the coupling is logical
Electric field of the field strength with phase is generated in the accelerating cavity of road perforation.
For example, referring to Fig. 1 and 3, what the controller 520 can control in the coupler 1203 of accelerator 510 first opens
Close the second switch component 140 between component 1207 and coupling channel 11 so that coupler 1203 is opened, coupling channel 11
It closes, so that the electric field strength reverse phase generated in each adjacent accelerating cavity, so that flowing through the electron beam of beam channel 130
It is lasting to accelerate.Fig. 2 and 4 are referred again to, the controller 520 can also control the first switch component in coupler 1203 simultaneously
1207 and coupling channel 11 in second switch component 140 so that coupler 1203 close, coupling channel 11 open so that
The same phase of electric field strength in accelerating cavity 1103 and 1104, so that the electron beam for flowing through beam channel 130 first accelerates to slow down afterwards,
I.e. by accelerating when accelerating cavity 1101-1103, when by accelerating cavity 1104, and pass through accelerating cavity 1105-1107 later
When, acceleration direction is on the contrary, electron-beam sustainer slows down.In Fig. 1 and 2, arrow a and b indicate that accelerating cavity is in two different respectively
When operating mode, at a time, electric field strength phase of each accelerating cavity internal electric field at 130 position of beam channel.
In specific implementation, the first switch component and second switch component all can be short bars, or its
His structure, as long as the first switch component can open or close coupler, the second switch component can play on or off
Close coupling channel.
Radiotherapy system in the embodiment of the present invention, not only can by control accelerator 510 generate image quality compared with
The electron beam of good KV level carrys out guided radiation treatment, and generated error when reducing radiotherapy can also pass through control
The electron beam that accelerator 510 generates megavolt grade to carry out radiotherapy, and 510 knot of the accelerator to the lesion of patient's body
Structure is relatively simple, thus can be more user-friendly, and can reduce cost.
To make those skilled in the art more fully understand and realizing the present invention, the embodiment of the present invention additionally provides a kind of acceleration
Tube controller, the accelerating tube include at least three accelerating cavities, and the specific physical arrangement of the accelerating tube may refer to Fig. 1 and 2
And the description in above-mentioned accelerating tube embodiment, as shown in fig. 6, the acceleration tube controller may include：
Instruction reception unit 61 is suitable for receiving the instruction for controlling the accelerating tube operating mode；
First control unit 62, suitable for when receiving the instruction accelerating tube and being operated in the instruction of first mode, control
The first switch component and second switch component are closed and are respectively added to open the coupler being arranged between each adjacent accelerating cavity
The coupling channel being arranged between fast chamber so that generate the electric field of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood；
Second control unit 63, suitable for when receiving the instruction accelerating tube and being operated in the instruction of second mode, control
The first switch component and second switch component to open a coupling channel, and close the two of the coupling channel perforation
The coupler being arranged between a accelerating cavity so that generate electric field of the field strength with phase in the accelerating cavity of the coupling channel perforation.
The embodiment of the present invention additionally provides a kind of accelerating tube control method, and the accelerating tube includes at least three accelerating cavities,
Concrete structure and operation principle may refer to above-described embodiment and Fig. 1-4, and with reference to Fig. 7, the control method may be used as follows
Step：
S71 receives the instruction for controlling the accelerating tube operating mode.
S72 determines the operating mode of the accelerating tube according to the instruction of the control accelerating tube operating mode received, when
When described instruction instruction accelerating tube is operated in first mode, step S73 is executed；When described instruction instruction accelerating tube is operated in second
When pattern, step S74 is executed.
S73 controls the first switch component and the second switch component, is set between each adjacent accelerating cavity with opening
The coupler set closes the coupling channel being arranged between each accelerating cavity so that in the accelerating tube in the accelerating cavity of arbitrary neighborhood
Generate the electric field of field strength reverse phase；
S74 controls the first switch component and the second switch component, to open a coupling channel, and closes
The coupler being arranged between two accelerating cavities of the coupling channel perforation so that production in the accelerating cavity of the coupling channel perforation
Electric field of the raw field strength with phase.
In specific implementation, the first switch component and the second switch component all can be short bar, can also
For other structures, coupler and coupling channel are opened and closed as long as can be used as to switch.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (6)
1. a kind of acceleration tube controller for accelerating tube, which is characterized in that the accelerating tube includes at least three accelerating cavities, respectively
It is of coupled connections by coupler between adjacent accelerating cavity, is provided with first switch component at least one coupler, described
The phase that the coupler that one switch block is suitable for opening or closing the coupler, and being provided with the first switch component is connected
Be provided between adjacent accelerating cavity suitable for penetrate through the adjacent acceleration cavities for power the direct coupling between the adjacent acceleration cavities
The coupling channel transmitted is closed, the coupling channel is parallel to the beam channel of the accelerating tube, not with the position of the coupler
It is identical and relative to the accelerating cavity non-centrosymmetry being connected to, second switch component is provided on the coupling channel, it is described
Second switch component is suitable for opening or closing the coupling channel, and the acceleration tube controller includes：
Instruction reception unit is suitable for receiving the instruction for controlling the accelerating tube operating mode；
First control unit, suitable for when receiving the instruction accelerating tube and being operated in the instruction of first mode, control described the
One switch block and the second switch component close each acceleration to open the coupler being arranged between each adjacent accelerating cavity
The coupling channel being arranged between chamber so that generate the electric field of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood；
Second control unit, suitable for when receiving the instruction accelerating tube and being operated in the instruction of second mode, control described the
One switch block and the second switch component to open a coupling channel, and close two that the coupling channel penetrates through
The coupler being arranged between accelerating cavity so that generate electric field of the field strength with phase in the accelerating cavity of the coupling channel perforation.
2. as described in claim 1 accelerate tube controller, which is characterized in that the first switch component of the accelerating tube and
Second switch component at least one be short bar.
3. accelerating tube controller as described in claim 1, which is characterized in that the coupler of the accelerating tube couples for side
Chamber.
4. accelerating tube controller as claimed in claim 3, which is characterized in that the position of the coupling channel of the accelerating tube
It is configured to associated with energy needed for the accelerating tube acceleration is arranged.
5. accelerating tube controller as claimed in claim 4, which is characterized in that the coupling channel setting of the accelerating tube exists
The cavity wall of the adjacent accelerating cavity is apart from nearest position.
6. a kind of accelerating tube control method for accelerating tube, which is characterized in that the accelerating tube includes at least three accelerating cavities,
It is of coupled connections by coupler between each adjacent accelerating cavity, first switch component is provided at least one coupler, it is described
What the coupler that first switch component is suitable for opening or closing the coupler, and being provided with the first switch component was connected
It is provided between adjacent acceleration cavities direct between the adjacent acceleration cavities for power suitable for penetrating through the adjacent acceleration cavities
The coupling channel transmitted is coupled, the coupling channel is parallel to the beam channel of the accelerating tube, the position with the coupler
It differs and relative to the accelerating cavity non-centrosymmetry being connected to, second switch component, institute is provided on the coupling channel
It states second switch component to be suitable for opening or closing the coupling channel, the accelerating tube control method includes：
Receive the instruction for controlling the accelerating tube operating mode；
When receiving the instruction accelerating tube and being operated in the instruction of first mode, the first switch component and described the are controlled
It is logical to close the coupling being arranged between each accelerating cavity to open the coupler being arranged between each adjacent accelerating cavity for two switch blocks
Road so that generate the electric field of field strength reverse phase in the accelerating tube in the accelerating cavity of arbitrary neighborhood；
When receiving the instruction accelerating tube and being operated in the instruction of second mode, the first switch component and described the are controlled
Two switch blocks to open a coupling channel, and close the coupling being arranged between two accelerating cavities of the coupling channel perforation
Close chamber so that generate electric field of the field strength with phase in the accelerating cavity of the coupling channel perforation.
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| CN201410608487.1A CN105636330B (en) | 2014-11-03 | 2014-11-03 | Accelerating tube and its control method accelerate tube controller and radiotherapy system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106851958B (en) * | 2017-02-14 | 2019-02-12 | 上海联影医疗科技有限公司 | Accelerating tube |
| CN107333382B (en) * | 2017-08-07 | 2019-09-10 | 东软医疗系统股份有限公司 | A kind of side coupled standing wave accelerator tube and standing wave accelerator |
| CN109462932B (en) | 2018-12-28 | 2021-04-06 | 上海联影医疗科技股份有限公司 | Standing wave accelerating tube |
| CN112867221B (en) * | 2020-12-30 | 2022-08-05 | 中国原子能科学研究院 | Acceleration structure and linear accelerator with same |
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Address after: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |