CN108096720A - Multi-diaphragm collimator initial method and radiotherapy system - Google Patents
Multi-diaphragm collimator initial method and radiotherapy system Download PDFInfo
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- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1042—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head
- A61N5/1045—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head using a multi-leaf collimator, e.g. for intensity modulated radiation therapy or IMRT
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Abstract
The present invention provides a kind of multi-diaphragm collimator initial method, and the multi-diaphragm collimator includes babinet and is arranged side by side in the in vivo blade of case, including：The transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values is corrected using correction switch, including：Successively moving blade to trigger it is described correction switch position, record the corresponding main encoder value of triggering moment and auxiliary encoder values, according to the transformational relation between the position of triggering moment blade and corresponding main encoder value correction leaf position and corresponding main encoder value, according to the transformational relation between the position of triggering moment blade and corresponding auxiliary encoder values correction leaf position and corresponding auxiliary encoder values.The leaf position that multi-diaphragm collimator initial method proposed by the present invention determines is more accurate.The present invention also provides a kind of radiotherapy system and computer readable storage mediums.
Description
Technical field
The present invention relates to field of medical technology more particularly to a kind of initial method of multi-diaphragm collimator, radiotherapy systems
System and computer readable storage medium.
Background technology
Multi-diaphragm collimator is the important composition component of the radiation head of medical radiotherapy instrument.Multi-diaphragm collimator generally includes
The babinet that is oppositely arranged and the in vivo two groups of blades of case are arranged at, pass through the radiation of the mobile formation given shape of two groups of blades
Open country, so as to carry out radiotherapy to tumor region.Therefore, whether leaf position accurately influences radiotherapy very big.
Absolute position of the blade in radiotherapy system depend on absolute position of the babinet in radiotherapy system with
And the relative position of blade opposite case.In order to ensure that blade can accurately be moved to desired position, in control multi-diaphragm collimator
, it is necessary to initialization operation be carried out to multi-diaphragm collimator, so that it is determined that the initial starting point of babinet and each blade before each component movement
Initial starting point.
In the initialization operation of multi-diaphragm collimator, when babinet is located at initial starting point, the corresponding encoder of babinet is returned
Zero, so as to which position of the babinet in radiotherapy system can be controlled by corresponding encoder；When blade is located at initial starting point
When, the corresponding encoder of blade is zeroed, can be controlled so as to the distance of blade opposite case by encoder.Pass through babinet
The encoder of encoder and blade can control absolute position of the blade in radiotherapy system.
During conventional initialization, all initialization procedures must be carried out serially, i.e. after the completion of a blade initialization
Next blade initialization can be carried out, is taken longer.
The content of the invention
Based on this, it is necessary to for above-mentioned technical problem, provide a kind of initialization side for taking shorter multi-diaphragm collimator
Method, radiotherapy system and computer readable storage medium.
On the one hand the application proposes a kind of multi-diaphragm collimator initial method, the multi-diaphragm collimator is including babinet and simultaneously
Row is arranged in the in vivo blade of case, the described method includes：
The blade is moved to after triggering and move backward a distance after corresponding leaf switch along opening direction successively
Stop, during the blade is moved along closing direction, record the blade described in when triggering corresponding leaf switch
The corresponding main encoder value of blade and auxiliary encoder values and the blade when stopping the corresponding main encoder value of the blade and
Auxiliary encoder values；
Using the blade when triggering corresponding leaf switch the corresponding main encoder value of blade and auxiliary encoder
The corresponding main encoder value of blade and auxiliary encoder values, calculate the corresponding master of the blade when value and the blade stop
The initial value of the initial value of encoder and auxiliary encoder.
Optionally, the method, which is further included along closing direction, makes the babinet stop after moving a distance, described in record
The babinet corresponding main encoder value of babinet and auxiliary encoder values and babinet when triggering corresponding box body switch stop
The corresponding main encoder value of babinet and auxiliary encoder values when only；
Using the babinet when triggering corresponding box body switch the corresponding main encoder value of babinet and auxiliary encoder
The corresponding main encoder value of babinet and auxiliary encoder values, calculate the corresponding master of the babinet when value and the babinet stop
The initial value of the initial value of encoder and auxiliary encoder.
Optionally, the method further includes the mobile babinet to corresponding first predeterminated position, and the babinet is located at pair
During the first predeterminated position answered, corresponding box body switch is triggered.
Optionally, the method further includes the mobile blade to corresponding first predeterminated position, and the blade is located at pair
During the first predeterminated position answered, corresponding leaf switch is not triggered.
Optionally, the method further includes the position of adjustment multi-diaphragm collimator to level.
Optionally, the speed that the blade is moved along opening direction is more than the speed that the blade is moved along closing direction.
Optionally, the babinet and the blade move parallel.
Optionally, the method is further included using correction switch to leaf position and corresponding main encoder value and auxiliary coding
Transformational relation between device value is corrected.
Optionally, using correction switch to the conversion between leaf position and corresponding main encoder value and auxiliary encoder values
Relation be corrected including：
Successively along closing direction moving blade to the position for triggering the correction switch, the corresponding chief editor of triggering moment is recorded
Code device value and auxiliary encoder values,
According to the position of triggering moment blade and corresponding main encoder value correction leaf position and corresponding main encoder
Transformational relation between value, according to the position of triggering moment blade and corresponding auxiliary encoder values correction leaf position with it is corresponding
Transformational relation between auxiliary encoder values.
Optionally, the method is further included is moved to corresponding second predeterminated position, the babinet by each blade and babinet
During positioned at corresponding second predeterminated position, the babinet does not trigger the correction switch, and it is pre- that the blade is located at corresponding second
If during position, the front end face of the blade and the distance of the correction switch are less than 2cm.
Optionally, the leaf position moves for the vertex in vane nose face relative to the babinet front end face along the blade
The distance in direction.
Optionally, the method is additionally included in during babinet or blade move, according to corresponding main encoder value and
Auxiliary encoder values judge whether multi-diaphragm collimator is abnormal.
On the other hand the application also proposed a kind of multi-diaphragm collimator initial method, the multi-diaphragm collimator includes babinet
Be arranged side by side in the in vivo blade of case, the described method includes：
Along opening direction moving parts to trigger continue to move to a distance after corresponding switch after stop, recording the portion
The part corresponding main encoder value of component and auxiliary encoder values and component when triggering corresponding switch stop when institute
The corresponding main encoder value of component and auxiliary encoder values are stated, the component is blade or babinet；
Using the component when triggering corresponding switch the corresponding main encoder value of component and auxiliary encoder values with
And the component corresponding main encoder value of component and auxiliary encoder values when stopping, calculating the corresponding main coding of the component
The initial value of the initial value of device and auxiliary encoder.
Optionally, the multi-diaphragm collimator initial method further includes moves each blade triggering along the opening direction successively
Correction switch, to be corrected to the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values.
On the other hand the application also proposed a kind of computer-readable storage medium for being used to store processor-executable instruction
Matter, which is characterized in that be used to perform method described in any one of the above embodiments when described instruction is executed by processor.
On the other hand the application also proposed a kind of radiotherapy system, including：
Multi-diaphragm collimator including babinet and is arranged side by side in the in vivo blade of case；
Multi-diaphragm collimator drive component, including：
Drive module, for the babinet and the blade to be driven to move,
Position feedback module, including main encoder and auxiliary encoder, for monitoring the babinet and the blade in real time
Position,
Control module initializes for the zero-bit to the component, and the component includes blade or babinet, feature
It is, the drive module moves backward one afterwards for moving the component along opening direction successively to corresponding switch is triggered
Segment distance, during the component is moved along closing direction, the control module is used to record the component in triggering pair
Component when the corresponding main encoder value of component and auxiliary encoder values and the component stop during the leaf switch answered
Corresponding main encoder value and auxiliary encoder values, and using the component when triggering corresponding switch the corresponding master of the component
The corresponding main encoder value of component and auxiliary encoder values, meter when encoder values and auxiliary encoder values and the component stop
Calculate the initial value of the corresponding main encoder of the component and the initial value of auxiliary encoder.
Another aspect of the present invention also proposed a kind of multi-diaphragm collimator initial method, and the multi-diaphragm collimator includes babinet
Be arranged side by side in the in vivo blade of case, the described method includes：
Using correction switch to the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values into
Row correction, including：
Moving blade is to the position for triggering the correction switch successively, the corresponding main encoder value of record triggering moment and auxiliary
Encoder values,
According to the position of triggering moment blade and corresponding main encoder value correction leaf position with it is corresponding
Transformational relation between main encoder value is corrected according to the position of triggering moment blade and corresponding auxiliary encoder values
Transformational relation between leaf position and corresponding auxiliary encoder values.
Optionally, the multi-diaphragm collimator initial method does not include initializing the zero-bit of the blade.
Optionally, switched using correction to turning between leaf position and corresponding main encoder value and auxiliary encoder values
The relation of changing further includes before being corrected：Obtain the location information of the relatively described babinet of each blade.
Optionally, switched using correction to turning between leaf position and corresponding main encoder value and auxiliary encoder values
The relation of changing further includes before being corrected：Each blade is moved to the position of mechanical position limitation.
Optionally, switched using correction to turning between leaf position and corresponding main encoder value and auxiliary encoder values
The relation of changing further includes before being corrected：The zero-bit of the babinet is initialized.
Optionally, switched using correction to turning between leaf position and corresponding main encoder value and auxiliary encoder values
The relation of changing further includes before being corrected：The zero-bit of the blade is initialized.
Another aspect of the present invention also proposed a kind of multi-diaphragm collimator initial method, and the multi-diaphragm collimator includes case
Body and the in vivo blade of case is arranged side by side in, including：
The zero-bit of the blade is initialized,
Using correction switch to the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values into
Row correction,
When the zero-bit to the blade initializes and to leaf position and corresponding main encoder value and auxiliary volume
When transformational relation between code device value is corrected, the moving direction of the blade is identical.
The another aspect of the application also proposed a kind of radiotherapy system, including：
Multi-diaphragm collimator including babinet and is arranged side by side in the in vivo blade of case；
Multi-diaphragm collimator drive component, including：
Drive module, for the babinet and the blade to be driven to move,
Position feedback module, including main encoder and auxiliary encoder, for monitoring the babinet and the blade in real time
Position,
Control module, for the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values into
Row correction.
Optionally, the multi-diaphragm collimator includes correction switch, is installed on the support construction of the multi-diaphragm collimator, described
Control module corrects each leaf position using the correction switch and turns between corresponding main encoder value and auxiliary encoder values
Change relation.
Optionally, the drive module is for moving blade successively to the position for triggering the correction switch, the control
Module is for recording the corresponding main encoder value of triggering moment and auxiliary encoder values, and according to the position of triggering moment blade and right
Transformational relation between the main encoder value correction leaf position answered and corresponding main encoder value, according to triggering moment blade
Transformational relation between position and corresponding auxiliary encoder values correction leaf position and corresponding auxiliary encoder values.
Optionally, the correction switch is positioned at the absolute zero position of the multi-diaphragm collimator coordinate system.
Optionally, the multi-diaphragm collimator includes box body switch, and the box body switch is installed on the multi-diaphragm collimator
Support construction, the control module are additionally operable to initialize the zero-bit of the babinet.
Optionally, the multi-diaphragm collimator includes leaf switch, and the leaf switch is installed on the babinet, the control
Molding block is additionally operable to initialize the zero-bit of the blade.
Optionally, the multi-diaphragm collimator does not include the leaf switch initialized for the zero-bit to the blade.
Compared with the prior art, a kind of multi-diaphragm collimator initial method provided by the present invention, radiotherapy system and
Computer readable storage medium can simultaneously initialize the multiple blades and babinet of multi-diaphragm collimator so that during initialization
Between it is shorter；
In initialization procedure, multi-diaphragm collimator is horizontally situated, so as to reduce the influence of gravity；
In initialization procedure, the direction of motion of babinet and blade in one direction, avoids introducing between machine driving always
The error that gap is brought；
In correction course, using absolute reference position of the blade in radiotherapy system to leaf position and encoder
When the relation of value is determined, since the relative position error and the babinet of blade opposite case are absolute in radiotherapy system
Site error is cancelled out each other, and there is no need to absolute position error of the babinet in radiotherapy system is corrected, you can
To accurate absolute position of the blade in radiotherapy system.
Description of the drawings
Fig. 1 is the schematic diagram of the radiotherapy system in one embodiment of the invention；
Fig. 2 is the floor map of multi-diaphragm collimator in one embodiment of the invention；
Fig. 3 is the structure diagram of multi-diaphragm collimator drive component in one embodiment of the invention；
Fig. 4 is the structure diagram of control module in one embodiment of the invention；
Fig. 5 is the flow chart of multi-diaphragm collimator initial method in one embodiment of the invention；
Fig. 6 is the flow chart initialized in one embodiment of the invention to the zero-bit of each blade and each babinet；
Fig. 7 is that the transformational relation between leaf position and corresponding encoder values is corrected in one embodiment of the invention
Flow chart；
Fig. 8 is the side schematic view of blade in one embodiment of the invention；
Fig. 9 is the flow chart of multi-diaphragm collimator initial method in another embodiment of the present invention；
Figure 10 is the floor map of multi-diaphragm collimator in another embodiment of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to the accompanying drawings and embodiments
Technical scheme is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
Technical scheme, the technical solution being not intended to limit the present invention.
Referring to Fig. 1, one embodiment of the invention provides a kind of radiotherapy system 100, the radiotherapy system 100
Including linear accelerator 10, bed component 20.The linear accelerator 10 is used to generate the beam (electricity of high level (such as megavolt grade)
Beamlet or X-ray) so as to be treated to target area (tumor region), including rack 11 and it is relatively arranged on controlling in rack 11
Treat first 12 and electronic portal image device 13 (Electronic Portal Imaging Device, abbreviation EPID).The machine
Frame 11 can be rotated around rotation axis A, so as to be treated in different angle to target area.The linear accelerator 10 is from this implementation
The disclosed limitation of example can also generate the beam of KV level for being imaged.
Patient 40 is moved to linear accelerator 10 by the bed component 20 for carrying patient 40.The bed component 20
Including pedestal 21 and bed board 22, the bed board 22 can be moved relative to the pedestal 21, and target area is moved to linear accelerator
10 isocenter point O.The beam centre axis that the isocenter point is substantially the rotation axis A of rack 11 and treatment head 12 is sent
The intersection point of (i.e. B in Fig. 1).The treatment head 12 sends beam (such as pencil-beam), electronic portal image device to patient 40
13 can receive the beam through patient 40 to generate the projected image in relation to 40 tissue density information of patient.
Since the shape of tumour when the shape of different type tumour is different or different angle is irradiated is also different, in order to protect target
Normal structure outside area and jeopardize organ from irradiation, and carry out the irradiation of high dose, the linear accelerating to target area as far as possible
Device 10 further includes multi-diaphragm collimator 14, and multi-diaphragm collimator 14 is installed to treatment head 12, for limiting radiation scope so that beam
Shape is matched with target area.The multi-diaphragm collimator 14 can be rotated around rotation axis B (beam centre axis), preferably to be fitted to target area
Shape.
Fig. 2 is the floor map of multi-diaphragm collimator in embodiment shown in FIG. 1.Referring to Fig. 2, multi-diaphragm collimator 14 is set
It is placed in support construction 15, and support construction 15 is rotatable in treatment head is rotated so as to fulfill multi-diaphragm collimator 14.In this reality
It applies in example, does not limit the concrete shape construction of support construction 15, such as it can be circular, square frame or other structures,
It can be driven, can also be driven otherwise by motor.Multi-diaphragm collimator 14 include babinet 141 and 142 and
Blade 143-i and multi-disc that multi-disc is arranged side by side in babinet 141 are arranged side by side in the blade 144-j in babinet 142, wherein i
It is integer with j, and 1≤i≤N1, 1≤j≤N2, N1And N2It represents respectively in the blade quantity and babinet 142 in babinet 141
Blade quantity.Preferably, N1Equal to N2.Babinet 141 and babinet 142 are oppositely arranged, and can independently be moved along the length direction of blade
Dynamic, two groups of blades 143-i and 144-j are oppositely arranged, and each blade can independently be moved along the length direction of blade, so as to
Realize the conformal of different target areas.
Conformal in order to which multi-diaphragm collimator 14 is driven to carry out, the radiotherapy system 100 further includes multi-diaphragm collimator driving
Component 30, for each babinet and each blade to be controlled to move, so as to be that different target areas are conformal.Fig. 3 is the more of one embodiment of the invention
The structure diagram of leaf collimator drive component.Referring to Fig. 3, multi-diaphragm collimator drive component 30 includes control module 31, driving
Module 32 and position feedback module 33.
Control module 31 can receive the target location for being input to drive component 30, and the information of target location is typically by driving
The host computer of component 30 provides.In other embodiments, control module 31 may include input unit, directly defeated for receiving user
The target position information entered.The target location is converted to control signal and is sent to drive module 32 by control module 31.It drives
Dynamic model block 32 includes motor, according to above-mentioned control signal each babinet and each blade is driven to be moved to target location.Feed back mould in position
Block 33 is used to monitor the current location of each babinet and each blade, and feeds back to control module 31.
Fig. 4 is the structure diagram of the control module of one embodiment of the invention.Referring to Fig. 4, the control module 31 includes
Initialization unit 311 and converting unit 312, the initialization unit 311 are used to initialize multi-diaphragm collimator 14, such as
The zero-bit of each babinet and each blade is set, corrects transformational relation between each encoder values and corresponding leaf position, described turn
Unit 312 is changed for the target location of the babinet received or blade to be converted to the desired value of corresponding main encoder, control
Module 31 sends control signal according to the desired value, and drive module 32 receives the control signal, drives corresponding motor operation, position
Feedback module 33 is put to monitor the current location of each babinet and each blade and fed back, for example, the actual value of motor encoder is anti-
Control unit 31 is fed to, when actual value reaches the desired value, control unit 31 stops drive case or blade movement.
Position feedback module 33 includes main encoder and auxiliary encoder, and the main encoder is arranged at motor side, described auxiliary
Encoder is arranged at cabinet end and blade end.Each babinet and each blade configure corresponding main encoder and auxiliary encoder.
In one embodiment, main encoder is the encoder with electric drilling match, and encoder is installed on motor shaft end, and motor leads to
The transmission mechanisms such as shaft coupling, screw are crossed to be connected with babinet or blade.When motor drives leading screw to drive babinet or leaf by shaft coupling
During the movement of piece, motor encoder can measure the rotation revolution of motor, and movement can be obtained according to the revolution that motor rotates
Displacement.Optionally, main encoder is mounted in the potentiometer of motor shaft end.Mechanical displacement can be converted into therewith by potentiometer
Into the resistance or voltage output of definite relation.When motor drives babinet or blade movement, motor also drives potentiometer mobile terminal
It moves, then the resistance variations of potentiometer.The variable quantity of resistance value reflects displacement, and the increase of resistance value still reduces, and shows leaf
The direction of piece movement.
In one embodiment, auxiliary encoder is multiple grating rule displacement sensors corresponding with each babinet and each blade.Light
Grid rule displacement sensor includes scale grating and grating reading head two parts.By taking blade end as an example, scale grating is arranged on blade
The side along length of blade direction on, grating reading head is arranged on the inner wall of babinet 141 towards being provided with scale grating
Blade side, and grating reading head is corresponding with scale stop position.Blade in the process of running, can drive scale grating together
Movement measures the displacement of blade operation by grating reading head.Optionally, position feedback unit 13 can be with each babinet and
The corresponding multiple magnetic displacement sensors of each blade, magnetic displacement sensor include multiple magnetic elements and with above-mentioned magnetic element one by one
Corresponding reading magnetic cell.By taking blade end as an example, magnetic element is arranged on the side along length of blade direction of blade, reads magnetic member
Part is arranged on 141 inner wall of babinet towards the blade side for being provided with magnetic element.Magnetic part in the present embodiment is bar shaped magnetic
Iron, reading magnetic cell are Hall sensor, when bar magnet as the opposite Hall sensor of blade is transported along bar magnet length direction
When dynamic, the magnetic field in Hall sensor can change, and Hall sensor can export pulse, certain magnetic according to the variation in magnetic field
Field variable quantity corresponds to a pulse.Since the Distribution of Magnetic Field of bar magnet has certain rule, changes of magnetic field amount and bar magnet
Displacement have definite relation, therefore, can according to Hall sensor export umber of pulse, obtain the displacement of blade movement.Auxiliary volume
Code device refer to the set-up mode of blade end, such as grating scale or magnetic element are arranged on babinet in the set-up mode of cabinet end
Side, grating reading head or read magnetic cell can be arranged in support construction 15, and with the grating scale or magnetic element position
Correspondence is put, so as to monitor the displacement of babinet.
Position feedback module 13 passes through main encoder and/or the displacement of each babinet of auxiliary encoders monitor and each blade.
In the case of initial position is known, the current location of each babinet and each blade can be obtained.
Before multi-diaphragm collimator progress is conformal, multi-diaphragm collimator is initialized by initialization unit 311 first.
Fig. 5 shows the flow chart of the multi-diaphragm collimator initial method in one embodiment of the invention.Refering to what is shown in Fig. 5, the method
Including：
Step 501, the zero-bit of each babinet and each blade is initialized.
It refers to shown in Fig. 2, the multi-diaphragm collimator 14 includes box body switch 1,2 and leaf switch 3,4.In the application
In, box body switch 1,2 and leaf switch 3,4 may be collectively referred to as switching.Box body switch 1,2 can be arranged at support construction 15
On, leaf switch 3,4 can be respectively arranged on babinet 141 and babinet 142.Box body switch 1,2 and leaf switch 3,4 can be with
Including transmitting terminal and receiving terminal for each in optoelectronic switch, such as each switch, the transmitting terminal is used to emit signal,
Receiving terminal is used to receive signal.In the present embodiment, transmitting terminal and receiving terminal are located at the both sides of blade (or babinet) moving direction.It can
Choosing, the line of transmitting terminal and receiving terminal is perpendicular to the moving direction of blade (or babinet).In other embodiments, transmitting terminal
The same side of blade (or babinet) moving direction can be arranged on receiving terminal.In other embodiments, the box body switch
1st, at least one in 2 can be mechanical switch.Make the position that each babinet is triggered corresponding box body switch by initialization unit 311
For the zero-bit of babinet, each blade is triggered to zero-bit of the position as blade of corresponding leaf switch.For example, using blade (or
Babinet) the corresponding leaf switch (box body switch) of triggering, according to the corresponding main encoder value of triggering moment and auxiliary encoder values with
And corresponding main encoder value and auxiliary encoder values initialize the zero-bit of blade (or babinet) when stopping.Detailed process please
Referring to Fig. 6.
In this example, it is assumed that box body switch 1,2 and leaf switch 3,4 are high level when being triggered, by babinet or
The rising edge of blade triggering high level and trailing edge moment are referred to as triggering moment.But the protection model of the present invention is not limited with this
It encloses, such as it can be low level to switch when being triggered, other form of presentation may be employed in rising edge time and trailing edge moment,
Within protection scope of the present invention.
Step 503, the transformational relation between leaf position and corresponding encoder values is corrected.
Multi-diaphragm collimator is used to carry out tumor region conformal, and whether depend on leaf position whether conformal accurate accurate,
Therefore initialization unit 311 is additionally operable to the transformational relation between correction leaf position and corresponding encoder values.
According to IEC (International Electrotechnical Commission, International Electrotechnical Commission) standard
Regulation, multi-diaphragm collimator coordinate system are the opposite static coordinate systems of multi-diaphragm collimator, and X-axis, Y-axis are as shown in Fig. 2, wherein, X-axis
Along blade moving direction, Y-axis is perpendicular to blade moving direction, and in this application, which is referred to as IEC coordinate systems.It is putting
In the operating with for the treatment of system, user is concerned about position of the blade in IEC coordinate systems.
Refer to shown in Fig. 2, multi-diaphragm collimator 14 further includes correction switch 5, for correct the position of each blade with it is corresponding
Encoder values between transformational relation.It is described correction switch 5 be located at the IEC coordinate systems in fixed positions, position not with
Babinet or moving for blade and change.Correction switch 5 can be arranged in support construction 15.In this application, by the school
The position of positive switch 5 is known as absolute position, and the origin of the coordinate system is known as absolute zero position.In the present embodiment, the correction
Switch 5 is located at the position of x=0, and the signal of transmitting is transmitted along Y direction, i.e., correction switch 5 is located in IEC coordinate systems along X-axis
The position of the absolute zero position in direction.
In the present embodiment, using in IEC coordinate systems absolute zero position correction leaf position and corresponding encoder values it
Between transformational relation.That is, at the time of blade triggering correction switch 5, control module 31 records the corresponding chief editor of the blade
Code device value and auxiliary encoder values.Initialization unit 311 determines two using main encoder value leaf position corresponding with the moment
Transformational relation between person determines that conversion between the two is closed using auxiliary encoder values leaf position corresponding with the moment
System.Detailed process refers to Fig. 7.
Fig. 6 is the flow chart initialized in one embodiment of the invention to the zero-bit of each blade and each babinet.It refers to
Fig. 6, the method initialized to the zero-bit of each blade and each babinet include the following steps：
601, the position of multi-diaphragm collimator is adjusted to level.
Rotary frame 11 or rotation multi-diaphragm collimator 14 so that multi-diaphragm collimator 14 is horizontally situated, so as to reduce weight
The influence of power.In the present embodiment, blade thinks leafy collimation parallel to horizontal plane along the either side of blade moving direction
Device 14 is horizontally situated." parallel " in the present embodiment can be understood as substantially parallel.That is, in the present embodiment
" parallel " is not limited to absolute parallel in mathematical meaning, i.e., multi-diaphragm collimator 14 and horizontal plane can have a smaller angle
Under the angle, the influence of gravity can be neglected in degree.Such as the coordinate system according to specified in IEC standard, by rack rotate to 0 ° it is attached
Closely or near 180 °, in this state, multi-diaphragm collimator 14 is parallel to horizontal plane.Optionally, 0 ° nearby can be [- 5 °,
5 °] or other acceptable numerical value, 180 ° can be nearby [175 °, 185 °] or other acceptable numerical value.At rack 11
In 90 ° or 270 °, multi-diaphragm collimator 14 is gone near 90 ° or 270 °, it is believed that multi-diaphragm collimator 14 is parallel to horizontal plane.It is optional
, 90 ° can be nearby [85 °, 95 °], and 270 ° can be nearby [265 °, 275 °].
603, each blade and babinet are moved to corresponding first predeterminated position.
In order to shorten the initialization time of blade and babinet, first each babinet and each blade can be respectively moved to corresponding
First predeterminated position, first predeterminated position are close to the position of inductive switch, such as along babinet or blade moving direction, institute
The first predeterminated position is stated with being less than 2cm, 1cm, 5mm, 3mm, 2mm or 1mm to the distance between inductive switch.By blade and babinet phase
It is known as closing direction to the direction of movement, is known as opening direction backwards to the direction of movement.
For example, when babinet is located at the first predeterminated position, babinet 141 and 142 triggers corresponding box body switch 1,2 respectively.
If according to the left side (or right side of babinet 142) of Fig. 2 middle cases 141 along babinet moving direction and box body switch 1 (or case
Whether body switch Distance Judgment babinet 141 (or 142) 2) is moved to the first predeterminated position, the distance less than 2cm, 1cm, 5mm,
It is believed that babinet 141 (or 142) is moved to the first predeterminated position when 3mm, 2mm or 1mm.By setting babinet corresponding first in advance
If position, can to avoid in initialization procedure two groups of blades collide when moving.
For example, when blade is located at the first predeterminated position, any blade is without triggering leaf switch 3 and 4.If according to
The left side (right side of blade 144-j) of blade 143-i is along blade moving direction and leaf switch 3 (or leaf switch in Fig. 2
4) whether Distance Judgment blade 143-i (or 144-j) is moved to the first predeterminated position, the distance be less than 2cm, 1cm, 5mm,
It is believed that blade 143-i (or 144-j) is moved to the first predeterminated position when 3mm, 2mm or 1mm.
Each blade is moved to corresponding first predeterminated position using mechanical position limitation.Such as each blade is simultaneously toward opening side
To movement, after blade bumps against mechanical position limitation, motor rotation blockage, electric current increase, control module 31 detects current of electric, if electric current
More than predetermined threshold value, and the duration is more than preset time, then it is assumed that blade bumps against mechanical position limitation.Mechanical position limitation can be case
Body, or other fixed mechanisms in opposite case position.After all blades bump against mechanical position limitation, all blades are controlled
A distance to a declared goal, which is moved, along closing direction reaches the first predeterminated position.For example, all blades are along closing direction displacement distance Dlaser
Reach the first predeterminated position.In the present embodiment, the position of mechanical position limitation is the medial surface 141IN of babinet 141 and babinet 142
Medial surface 142IN.
Each blade is moved to corresponding first predeterminated position using auxiliary sensor.Such as each blade is simultaneously toward closure side
To movement, until reach the maximum or minimum value of auxiliary sensor measurement range, then by each blade toward negative direction (i.e. opening side
To) move to the first predeterminated position.
Above example is for reference only, but is not limited with this in the present invention babinet or blade being moved to the first default position
The mode put.In the present embodiment, corresponding first predeterminated position of babinet the first predeterminated position corresponding from blade is different.
605, the zero-bit of each blade and each babinet is initialized.
Since each babinet and each blade can be moved independently, the zero-bit of each babinet and each blade is carried out respectively initial
Change.It is introduced exemplified by being initialized along closing direction, but protection scope of the present invention is not limited with this.
By taking blade 143-1 initialization as an example, blade 143-1 is moved to triggering blade with the first blade velocity along opening direction
Behind the position of switch 3, stop movement, then blade 143-1 is moved with the second blade velocity along closing direction, as blade 143-1
During the signal that blocking vane switch 3 emits just, i.e. when blade 143-1 triggers leaf switch 3, control module 31 records blade
143-1 is in the moment corresponding main encoder value E143-1_latched_primaryWith auxiliary encoder values E143-1_latched_secondary, blade
143-1 continues to move to a distance, and control module 31 is recorded in corresponding main encoder value after blade 143-1 stops
E143-1_current_primaryWith auxiliary encoder values E143-1_current_secondary, so that it is determined that main encoder and auxiliary encoder is initial
Value is as follows respectively：
The zero-bit of blade 143-1 can be initialized using above-mentioned formula (1), main encoder that will be current and auxiliary
The numerical value of encoder uses E respectively143-1_init_primaryAnd E143-1_init_secondaryIt is updated, so that when 143-1, blade
When zero-bit, corresponding main encoder and auxiliary encoder values are zero.
Each blade can be initialized successively in the manner described above.In order to shorten the initialization time of blade as far as possible,
Preferably, above-mentioned first blade velocity is more than second blade velocity, so as to be protected on the basis of blade traveling time is shortened
Demonstrate,prove the accuracy of zero-bit initialization；Any blade 143-i and any blade 144-j can be carried out at the same time initialization, with further
Shorten initialization time.
The initialization procedure of babinet is similar with the initialization procedure of blade.By babinet 141 initialization exemplified by, babinet 141 with
One speed is moved along closing direction, when babinet 141 trigger box body switch 1 when, i.e., when box body switch 1 be optoelectronic switch, babinet 141
Just do not stop that babinet 141 departs from babinet and opens just during the signal that box body switch 1 emits or when box body switch 1 is mechanical switch
When closing 1, control module 31 records babinet 141 in the moment corresponding main encoder value E141_latched_primaryWith auxiliary encoder values
E143_latched_secondary, babinet 141 continues to move to a distance, and initialization unit 311 receives right after the stopping of babinet 141
The main encoder value E answered141_current_primaryWith auxiliary encoder values E141_current_secondary, so that it is determined that main encoder and auxiliary
The initial value difference of encoder is as follows：
The zero-bit of babinet 141 can be initialized using above-mentioned formula (2), main encoder that will be current and auxiliary volume
The numerical value of code device uses E respectively141_init_primaryAnd E141_init_secondaryIt is updated, so that when babinet 141 is located at zero-bit
When, corresponding main encoder value and auxiliary encoder values are zero.
In initialization procedure is carried out respectively to the zero-bit of blade and babinet, babinet 141 and babinet 142 can be carried out at the same time
Initialization, babinet 141, babinet 142 and any blade can be carried out at the same time initialization；Any blade 143-i and any blade
144-j can be initialized simultaneously, further to shorten zero-bit initialization time；When blade or babinet do not stop corresponding open just
When closing the signal of transmitting, blade or babinet continue to move to a distance, and leaf switch or box body switch can be prevented to be in critical
State increases the accuracy of measurement, is further ensured that the accuracy of zero-bit initialization.
The process that the above-mentioned zero-bit to each babinet and each blade is initialized can be parallel, i.e. babinet and blade can be simultaneously
Row movement.In the above-described embodiments, step 603 can be omitted.
The embodiment of Fig. 6 describes a kind of method that zero-bit to blade and babinet is initialized.But the present invention is unlimited
In this, other methods initialized to zero-bit can also be used for the embodiment of alternate figures 6, such as in order to for the sake of simplicity, can be with
Stop moving blade (or babinet) at the time of the state directly switched in blade (or babinet) changes, and will blade at this time
(or babinet) corresponding main encoder and auxiliary encoder values are updated to zero, so as to fulfill the initialization to multi-diaphragm collimator.Example again
Such as, leaf switch can be arranged on the centre of two groups of blades to be initialized or be switched using correction the zero-bit of 5 pairs of blades
It is initialized.
After the zero-bit to each blade and each babinet initializes, can according to main encoder value and leaf position or
Relation control babinet and blade between box location are respectively moved to desired position, so as to form desired launched field.
For example, be introduced so that motor encoder replaces main encoder as an example, if component k represents blade or babinet, then portion
Relation between the corresponding motor encoder values of part k and the position of component k is：
EnCk=Posk×Gaink+Offsetk (3)
Wherein, EnckRepresent the value of the corresponding motor encoders of component k, GainkThe corresponding motor gains of component k are represented,
With the line number, register ratio, component k setting height(from bottom)s of motor encoder to etc. central planes projection ratio it is related, PoskFor
The position of component k, OffsetkFor constant.The central planes such as described were isocenter point and the plane vertical with beam centre axis.
Each blade and babinet can be moved to by desired position according to formula (3), so as to form desired launched field.Blade-shaped
Into absolute position of the launched field shape with the front end face of blade in radiotherapy system it is related, depending on babinet is controlled in radiation
The relative position of absolute position and blade opposite case in treatment system, if there are error and/or blade phases for box location
To the position of babinet there is also error, then can influence the positional precision of blade, thus the application also to leaf position with it is corresponding
Transformational relation between encoder values is corrected, to improve the precision of leaf position.
Absolute position of the blade in radiotherapy system can be indicated with the front end face position of blade.In order to
Convenience of calculation and the conversion of multiple position is avoided to introduce error, the present embodiment raising middle flask body position refers to the front end face of babinet with respect to IEC
Distance of the Y-axis of coordinate system along the babinet moving direction, the leaf position are the relatively described babinet front end in vane nose face
Distance of the face along the blade moving direction.The front end face is babinet or blade close to the end face of correction switch 5, such as Fig. 2
The left side 144-jL of the right side 143-iR of middle blade 143-i, blade 144-j, the right side 141R of babinet 141, babinet 142
Left side 142L.Directly the position in vane nose face is corrected, it can be ensured that the accuracy for the launched field that blade is formed.
In other embodiments, box location can be distance of the babinet any part with respect to the Y-axis of IEC coordinate systems, and leaf position can be with
For blade any part relative vane zero point or the distance of other reference points, within the scope of the present invention.
Fig. 7 is that the transformational relation between leaf position and corresponding encoder values is corrected in one embodiment of the invention
Flow chart.Refering to what is shown in Fig. 7, the method bag being corrected to the transformational relation between leaf position and corresponding encoder values
It includes：
701, each blade and babinet are moved to corresponding second predeterminated position.
Mobile box 141 and 142 is respectively to corresponding second predeterminated position, during follow-up be corrected, babinet
141 and 142 can be motionless with holding position.For example, mobile box 141 makes the position that its front end face is located at y=-dcm in IEC coordinate systems
It puts, mobile box 142 makes the position that its front end face is located at y=dcm in IEC coordinate systems.
141 moving blade 143-i of opposite case and opposite case 142 moving blade 144-j to corresponding second is pre- respectively
If position so that the front end face of blade 143-i and 144-j are located at close to the position of correction switch 5.Second predeterminated position with
Correction switch 5 can be less than 2cm, 1cm, 5mm, 3mm, 2mm along the distance of Y direction.
In this step, babinet and blade can be with synchronizing movings.
703, triggering moment is recorded with third speed moving blade to the position for triggering correction switch along closing direction successively
Corresponding main encoder value and auxiliary encoder values.
In the present embodiment, it is corrected using the corresponding transformational relation of the same multiple blades of 5 pairs of correction switch, therefore
Synchronization can only there are one blade triggering correction switches 5.By taking blade 143-1 as an example, blade 143-1 is closed with third speed edge
After direction is moved to the position of triggering correction switch 5, stop movement.At the time of blade 143-1 triggers correction switch 5, control
Module 31 records the corresponding main encoder value E of the blade143-1_cali_latched_primaryWith auxiliary encoder values
E143-1_cali_latched_secondary.Then blade 143-1 retreats to the position for not stopping correction switch 5 along opening direction with fourth speed
It puts, while another blade 144-j or 143-i (i ≠ 1) is moved to the position of triggering correction switch 5, control module with third speed
31 record triggering moment main encoder values and auxiliary encoder values, and so on, each blade is moved to triggering along closing direction successively
It is described correction switch 5 position, control module 31 record each blade along closing direction move when triggering correction switch 5 at the time of
Corresponding main encoder value and auxiliary encoder values, initialization unit 311 is according to the corresponding main encoder of the triggering moment recorded
Value and the corresponding leaf position correction leaf position of auxiliary encoder values and triggering moment and corresponding main encoder value and auxiliary volume
Transformational relation between code device value.
Corresponding each parameter brings formula (3) into and obtains following formula at the time of blade k is triggered correction switch 5：
The corresponding Offset of each blade can be calculated according to formula (4)k_primaryAnd Offsetk_secondary, wherein
Offsetk_primaryFor the corresponding constant of main encoder, Offsetk_seccondarySupplemented by the corresponding constant of encoder, so as to complete
Correct leaf position and the relation between corresponding main encoder value and auxiliary encoder values.In the present embodiment, absolute zero is utilized
Position is to OffsetkIt is corrected, obtained OffsetkIn eliminate box location error and the relative position of blade opposite case
The influence of error, according to the OffsetkMoving blade can improve the accuracy of leaf position.
In other embodiments, can utilize in radiotherapy system along other absolute positions of X-direction to each blade
Corresponding OffsetkIt is corrected.Such as position of 5 installation of switch to x ≠ 0 will be corrected.In other embodiments, correction switch
The signal of 5 transmittings can have an angle with Y-axis, as long as the position of blade triggering correction switch 5 is accurately known.
In above-mentioned moving process, the translational speed of each blade can be identical, can not also be identical.Preferably, described
Four speed are more than the third speed, so as to reduce the time of blade operation, while ensure the accuracy of correction.Above-mentioned each blade
Correction course be synchronous progress.In the embodiment of Fig. 7, step 701 can be omitted.
In another embodiment, the front end face of blade is arc.Refering to what is shown in Fig. 8, the front end face of blade 143-i is arc
Shape, the position of triggering correction switch 5 and the vertex V1 of blades 143-i curved ends, but apart from the point of vertex certain distance
V2.Therefore the range difference e of V1 and V2 along X-direction is required supplementation withk.Therefore, with distance ekCorrection formula (4) can obtain following formula：
The Offset being calculated according to formula (5)kIt is more accurate, can be effectively ensured blade can be moved to it is desired
Position.
In the initialization procedure of the application, according to the zero-bit of 3,4 pairs of babinets or blade of box body switch 1,2 and leaf switch
When being corrected when being initialized and according to correction 5 pairs of transformational relations between leaf position and encoder values of switch, case
Body and blade are moved along closing direction, i.e., the movement of babinet and blade always in one direction, so in initialization procedure
It is not introduced into the error that mechanic transmission clearance is brought.
In the initialization procedure of the application, the conversion between leaf position and main encoder value is closed using absolute position
System is corrected, and blade can be allowd to be moved to accurate location, reduces error；Blade is absolute in radiotherapy system
Position depends on the relative position of absolute position and blade opposite case of the babinet in radiotherapy system, to the exhausted of blade
Position is corrected, then without being corrected to absolute position of the babinet in radiotherapy system, simplifies operation, reduces meter
Calculation amount.
During above-mentioned initialization, whether value of the auxiliary encoder values for two sets of encoders of verification has exception.
For example, representing blade or babinet with component k, during component k is moved, feedback module 33 Real-time Feedback in position is every
The main encoder value and auxiliary encoder values of a component, are denoted as E respectivelyk_current_primaryAnd Ek_current_secondary, two sets of codings
The corresponding gain of device is respectively Gaink_primaryAnd Gaink_secondary, then the alternate position spike PosDiff of two sets of encoder feedbackskFor：
If PosDiffkMore than predetermined threshold value, then control module 31 sends error signal, notifies user's multi-diaphragm collimator
Mobile appearance it is abnormal.Therefore, whether in presently filed embodiment, can monitor multi-diaphragm collimator in real time can normal work
Make.
In the above-described embodiments, the zero-bit of babinet and blade is initialized first, then to leaf position and chief editor
Transformational relation between code device value and auxiliary encoder values is corrected.In another embodiment, without the zero-bit progress to blade
Initialization, can directly correct the transformational relation between leaf position and main encoder value and auxiliary encoder values, with reference to figure 9.
Fig. 9 is the flow chart of multi-diaphragm collimator initial method in another embodiment of the present invention.Figure 10 is that the present invention is another
The floor map of multi-diaphragm collimator in embodiment.Refering to what is shown in Fig. 9, the described method includes：
Step 901, the zero-bit of each babinet is initialized.
Referring to Fig. 10, Figure 10's and Fig. 2 differs only in, leaf switch 3,4 can not be included in Figure 10.Mobile each case
Each babinet is triggered zero-bit of the position as babinet of corresponding box body switch by body.Detailed process can refer to retouching for Fig. 5 and Fig. 6
It states, details are not described herein.
903, each babinet and each blade are moved to corresponding second predeterminated position.
Each babinet and each blade are moved to the second predeterminated position respectively using formula (3), to shorten the stroke of blade, section
It makes an appointment.Second predeterminated position may be referred to the related statement of step 701.
905, triggering moment is recorded with third speed moving blade to the position for triggering correction switch along closing direction successively
Corresponding main encoder value and auxiliary encoder values.
In the present embodiment, correction 5 pairs of each leaf positions of switch and corresponding main encoder value and auxiliary encoder values are utilized
Between initial relation be corrected, specifically describe and can refer to the description of Fig. 7 and Fig. 8.
In the embodiment in fig. 9, before step 903, absolute encoder (such as potentiometer etc.) can be utilized to obtain each
Blade is moved to the described second default position by the location information of blade opposite case according to the location information and using formula (3)
It puts；, can be by the way that each blade be moved to reference position or before step 903, which can be mechanical position limitation
Position, such as can be the medial surface of babinet, the location information of blade and will using formula (3) during according to positioned at reference position
Blade is moved to second predeterminated position.The correlative detail of the embodiment of Fig. 9 refer to the description of foregoing any embodiment.
In above-described embodiment, leaf switch 3,4 is saved, simplifies the initialization flow of multi-diaphragm collimator, and ensures the standard of leaf position
True property helps to improve the validity for the treatment of.
In the embodiment of Fig. 6-9, multi-diaphragm collimator is initialized along closing direction.It is but in other embodiments, more
Leaf collimator can be initialized along opening direction.
Such as along opening direction carry out zero-bit initialization, only by taking blade as an example, drive module 32 drive successively each blade with
One blade velocity is moved to after triggering leaf switch along opening direction and continues to move to a distance, when the record of control module 31 triggers
Corresponding main encoder value and auxiliary encoder values and the main encoder value after blade stopping and auxiliary encoder values are carved, so as to
It determines the initial value of main encoder and auxiliary encoder, and then completes zero-bit initialization.It, can be quick after blade completes movement
(translational speed during opposite initialization is fast), which retreats to, does not influence the position that other blades are initialized.The zero-bit initialization of babinet
It is same as described above.
It can also be along opening direction moving blade so as to the transformational relation between leaf position and corresponding encoder values
It is corrected.Corresponding main encoder value and auxiliary encoder values carry out school at the time of triggering correction switch 5 also with each blade
Just.Detail can refer to the description of Fig. 6-9.
Predeterminated position (such as the first predeterminated position, second predeterminated position) in any embodiment of the present invention is mainly to be
Shorten displacement distance of the blade in initialization procedure, so as to shorten the time of initialization procedure.It the position can be according to need
It is configured, it might even be possible to be not provided with.
A kind of computer readable storage medium for storing processor-executable instruction is also provided in one embodiment of the invention,
The step of when described instruction is executed by processor for performing the method as described in foregoing any embodiment.
In several embodiments provided by the present invention, it should be understood that disclosed relevant apparatus and method, Ke Yitong
Other modes are crossed to realize.For example, device embodiment described above is only illustrative, for example, the module or unit
Division, be only a kind of division of logic function, can have other dividing mode, such as multiple units or group in actual implementation
Part may be combined or can be integrated into another system or some features can be ignored or does not perform.It is another, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be by some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can be located at a place or can also be distributed to multiple
In network element.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be employed in member is realized, can also be realized in the form of SFU software functional unit.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, in the embodiment of the present invention, described program can be stored in the storage medium of computer system, and by the computer system
In at least one processor perform, with realize include as above-mentioned each method embodiment flow.Wherein, the storage medium
Can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random
Access Memory, RAM) etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that come for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (15)
1. a kind of multi-diaphragm collimator initial method, the multi-diaphragm collimator includes babinet and is arranged side by side in the in vivo leaf of case
Piece, including：
School is carried out to the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values using correction switch
Just, including：
Moving blade records the corresponding main encoder value of triggering moment and auxiliary coding to the position for triggering the correction switch successively
Device value,
According to the position of triggering moment blade and corresponding main encoder value correction leaf position and corresponding main encoder value it
Between transformational relation, according to the position of triggering moment blade and corresponding auxiliary encoder values correction leaf position and corresponding auxiliary volume
Transformational relation between code device value.
2. multi-diaphragm collimator initial method as described in claim 1, which is characterized in that do not include the zero-bit to the blade
It is initialized.
3. multi-diaphragm collimator initial method as described in claim 1, which is characterized in that switched using correction to blade position
It puts before the transformational relation between corresponding main encoder value and auxiliary encoder values is corrected and further includes：
Obtain the location information of the relatively described babinet of each blade.
4. multi-diaphragm collimator initial method as described in claim 1, which is characterized in that switched using correction to blade position
It puts before the transformational relation between corresponding main encoder value and auxiliary encoder values is corrected and further includes：
Each blade is moved to reference position.
5. multi-diaphragm collimator initial method as described in claim 1, which is characterized in that switched using correction to blade position
It puts before the transformational relation between corresponding main encoder value and auxiliary encoder values is corrected and further includes：
The zero-bit of the babinet is initialized.
6. multi-diaphragm collimator initial method as described in claim 1, which is characterized in that switched using correction to blade position
It puts before the transformational relation between corresponding main encoder value and auxiliary encoder values is corrected and further includes：
The zero-bit of the blade is initialized.
7. multi-diaphragm collimator initial method as described in claim 1, which is characterized in that further include adjustment multi-diaphragm collimator
Position is to level.
8. a kind of multi-diaphragm collimator initial method, the multi-diaphragm collimator includes babinet and is arranged side by side in the in vivo leaf of case
Piece, including：
The zero-bit of the blade is initialized,
School is carried out to the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values using correction switch
Just,
When the zero-bit to the blade initializes and to leaf position and corresponding main encoder value and auxiliary encoder
When transformational relation between value is corrected, the moving direction of the blade is identical.
9. a kind of radiotherapy system, including：
Multi-diaphragm collimator including babinet and is arranged side by side in the in vivo blade of case；
Multi-diaphragm collimator drive component, including：
Drive module, for the babinet and the blade to be driven to move,
Position feedback module, including main encoder and auxiliary encoder, for monitoring the position of the babinet and the blade in real time,
Control module, for carrying out school to the transformational relation between leaf position and corresponding main encoder value and auxiliary encoder values
Just.
10. radiotherapy system as claimed in claim 9, which is characterized in that the multi-diaphragm collimator includes correction and switchs, peace
Support construction loaded on the multi-diaphragm collimator, the control module using the correction switch correct each leaf position with it is corresponding
Main encoder value and auxiliary encoder values between transformational relation.
11. radiotherapy system as claimed in claim 9, which is characterized in that the drive module is for moving blade successively
To the position for triggering the correction switch, the control module is used to record the corresponding main encoder value of triggering moment and auxiliary coding
Device value, and according to the position of triggering moment blade and corresponding main encoder value correction leaf position and corresponding main encoder value
Between transformational relation, according to the position of triggering moment blade and corresponding auxiliary encoder values correction leaf position with it is corresponding auxiliary
Transformational relation between encoder values.
12. radiotherapy system as claimed in claim 10, which is characterized in that the correction switch is located at the leafy collimation
The absolute zero position of device coordinate system.
13. radiotherapy system as claimed in claim 9, which is characterized in that the multi-diaphragm collimator includes box body switch, institute
State the support construction that box body switch is installed on the multi-diaphragm collimator, the control module be additionally operable to the zero-bit of the babinet into
Row initialization.
14. radiotherapy system as claimed in claim 9, which is characterized in that the multi-diaphragm collimator includes leaf switch, institute
It states leaf switch to be installed on the babinet, the control module is additionally operable to initialize the zero-bit of the blade.
15. radiotherapy system as claimed in claim 9, it is characterised in that the multi-diaphragm collimator does not include for described
The leaf switch that the zero-bit of blade is initialized.
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| CN115933770A (en) * | 2022-12-07 | 2023-04-07 | 江苏瑞尔医疗科技有限公司 | Automatic rapid switching collimator system for realizing precise motion control |
| CN115933770B (en) * | 2022-12-07 | 2023-11-14 | 江苏瑞尔医疗科技有限公司 | Automatic and rapid switching collimator system for realizing accurate motion control |
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