CN105852901B - Electron linear accelerator, beam-defining clipper and lead leaf driving device, actuator - Google Patents
Electron linear accelerator, beam-defining clipper and lead leaf driving device, actuator Download PDFInfo
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- CN105852901B CN105852901B CN201610236662.8A CN201610236662A CN105852901B CN 105852901 B CN105852901 B CN 105852901B CN 201610236662 A CN201610236662 A CN 201610236662A CN 105852901 B CN105852901 B CN 105852901B
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- lead
- lead leaf
- leaf
- actuator
- defining clipper
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/12—Devices for detecting or locating foreign bodies
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/08—Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4064—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis specially adapted for producing a particular type of beam
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/22—Details of linear accelerators, e.g. drift tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
Abstract
The present invention provides a kind of electron linear accelerator, beam-defining clipper and its lead leaf driving device, actuator, it can be realized the independent driving of each lead leaf, and then by control lead leaf formation rule or irregular launched field, preferably match with the shape of lesion, reduces radiation injury of the beam to healthy position.The lead leaf actuator includes mounting base, the lead screw being connected with power source and the nut for being bolted in the lead screw, one of lead leaf of the mounting base and beam-defining clipper is connected, and be rotatably connected with the nut axial restraint, circumferential direction, to drive the lead leaf along the axial movement of the lead screw.The lead leaf driving device, for driving the two lead Ye Yundong for being in same layer, including the lead leaf actuator being connect respectively with the two lead leaves, each lead leaf actuator respectively drives and corresponding lead leaf self-movement, so that the two lead leaves are relatively close or separate, to adjust the launched field between the two lead leaves；The lead leaf actuator is above-mentioned lead leaf actuator.
Description
Technical field
The present invention relates to medical diagnosis therapeutic equipment technical fields, more particularly to a kind of beam-defining clipper and its lead leaf driving dress
It sets, lead leaf actuator, the electron linear accelerator with the beam-defining clipper.
Background technique
With electron linear accelerator function be continuously increased with it is perfect, entire electron linear accelerator system configuration EPID
When (Electronic Portal Imaging Device, electronic portal image device), needs to configure and examined similar to X-ray
Bulb and beam-defining clipper in disconnected equipment.
The working principle for being equipped with the clinac of beam-defining clipper is as follows: when the X-ray beam of generation passes through limit beam
When device device is formed by regular launched field and projects patient body lesions position, energy that X-ray beam generates on electronic plane
Amount information is converted into digital signal, for carrying out computer-internal logical signal processing, to form the lesion portion projected to patient
The imaging explanation of position, analyzes and diagnoses for doctor and related personnel.
Referring to FIG. 1, Fig. 1 is that a kind of lead leaf of typical beam-defining clipper opens and closes schematic diagram in the prior art.
As shown in Figure 1, beam-defining clipper used in existing x-ray diagnostic equipment mainly includes that upper layer and lower layer are handed in intersecting parallels
The lead leaf 1 ' of mistake arrangement, each layer of V-shaped arrangement of lead leaf 1 ', the center of intersecting parallels is the projection hole of X-ray.It is examined by X-ray
The design of such beam-defining clipper structure and the restriction of control mode, upper layer and lower layer lead leaf 1 ' used in disconnected equipment can only wait relatively
Center line M ' carries out symmetrical open and close movement, with the launched field of formation rule, that is to say, that two lead leaves 1 ' in every layer use
Same driving mechanism synchronizes driving.Although the open and close movement of this symmetrical expression can change the size of launched field, but not change
Become the center of photography, i.e. the center of projection of X-ray beam will not change.When the lesions position on patient body does not exist
When the lead leaf 1 ' of beam-defining clipper is formed by center of projection, the beam-defining clipper of this symmetrical structure can only be by expanding groined type center
The X-ray beam inspection to lesions position is realized in domain.
Since x-ray diagnostic equipment is for diagnosing using beam-defining clipper device, the dosage and energy of X-ray are smaller,
Expand also smaller to the damage at patient health position when launched field.But electron linear accelerator belongs to therapeutic equipment, can generate height
Energy X-ray beam treats lesion, and the dosage of X-ray reaches MV grades, hence it is evident that the X emitted higher than x-ray diagnostic equipment
Ray beam.If checking patient's by the equidistant while outside visual field for expanding beam-defining clipper using existing beam-defining clipper
Different lesions positions be easy to cause patient's lesions position to receive the X-ray beam of larger dose since swept area is bigger；
It so that the healthy position of patient is come to harm because receiving additional X-ray beam, and generate other immeasurable consequences.
Meanwhile the change of position may occur with the variation of time for lesion, each lesion due to the difference of mechanisms, shape not yet
Equally, this requires beam-defining clippers to be capable of forming various asymmetrical launched fields, with the shape close to lesions position, reduces
The amount of radiation of the received X-ray in patient health position.
Therefore, a kind of beam-defining clipper and its lead leaf driving device, lead leaf actuator how to be designed, with the beam-defining clipper function
Electron linear accelerator to realize the self-movement of each lead leaf, and then forms the launched field with patient's lesions position analogous shape, subtracts
The amount of radiation of few received ray in patient health position, the technical issues of becoming those skilled in the art's current urgent need to resolve.
Summary of the invention
The present invention provides a kind of lead leaf driving devices of beam-defining clipper, lead leaf actuator, can be realized the independence of each lead leaf
Driving, and then by control lead leaf formation rule or irregular launched field, preferably match with the shape of lesion.
The present invention also provides a kind of beam-defining clippers, have above-mentioned lead leaf driving device, are capable of forming and lesion shape phase
Similar launched field reduces radiation injury of the beam to healthy position.
Invention further provides a kind of electron linear accelerator, can according to the big minor adjustment dose of radiation of lesions position,
And then realize efficient diagnoses and treatment.
In order to solve the above technical problems, the lead leaf actuator of beam-defining clipper provided by the present invention, including mounting base and power source
One of lead leaf of connected lead screw and the nut for being bolted in the lead screw, the mounting base and beam-defining clipper is connected, and with institute
It states nut axial restraint, be circumferentially rotatably connected, to drive the lead leaf along the axial movement of the lead screw.
Lead leaf actuator of the invention, is moved axially by the rotate driving nut of lead screw along lead screw, so drive with
The mounting base of nut connection is mobile, since one of lead leaf of mounting base and beam-defining clipper is connected, lead leaf will be driven along lead screw
Axial movement, and then realize driving to lead leaf.Moreover, because such structure can be realized and some lead leaf by mounting base
Independent connection, can be realized the independent driving of lead leaf, so that the movement of each lead leaf is relatively independent, so that by each lead
The adjusting of launched field shape and size is realized in the motion control of leaf, and preferably to match with lesion, it is strong to patient to reduce beam
The radiation injury at health position.
The lead leaf driving device of beam-defining clipper provided by the present invention, for drive be in same layer two lead Ye Yundong, including
The lead leaf actuator connecting respectively with the two lead leaves, each lead leaf actuator respectively drive and corresponding lead leaf
Self-movement, so that the two lead leaves are relatively close or separate, to adjust the launched field between the two lead leaves；The lead leaf driving
Part is above-mentioned lead leaf actuator.
Lead leaf actuator is respectively set for the two lead leaves in same layer in lead leaf driving device of the invention, and each lead leaf drives
Moving part is relatively independent, can respectively drive each lead leaf and carry out self-movement, thus increase the adjustable range of launched field between two lead leaves,
So that two layers of lead leaf can cooperate more flexiblely, to form multiple rule or irregular launched field, it is particularly possible to according to disease
Stove changes the center of launched field, and then preferably matches with lesions position；It, not only can be more when launched field matches substantially with lesion
Diagnosing and treating is targetedly carried out, can also be avoided as much as in the healthy position merging launched field of patient, to reduce
Radiation injury of the beam to patient health position.
Beam-defining clipper provided by the present invention includes lead leaf and lead leaf driving device, and the lead leaf driving device is above-mentioned lead leaf
Driving device.
Electron linear accelerator provided by the present invention, including above-mentioned beam-defining clipper.
Since electron linear accelerator of the invention, beam-defining clipper include above-mentioned lead leaf driving device, therefore above-mentioned lead leaf
Technical effect caused by driving device is suitable for the invention electron linear accelerator and beam-defining clipper, and details are not described herein again.
Detailed description of the invention
Fig. 1 is that a kind of lead leaf of typical beam-defining clipper opens and closes schematic diagram in the prior art；
Fig. 2 is the schematic perspective view of lead leaf actuator provided by the present invention in a specific embodiment；
Fig. 3 is the top view of lead leaf actuator shown in Fig. 2；
Fig. 4 is the schematic perspective view of lead leaf actuator Position Sensor shown in Fig. 2；
Fig. 5 is the schematic diagram that lead leaf actuator shown in Fig. 2 carries out motion control to lead leaf；
Fig. 6 is the schematic perspective view of lead leaf driving device provided by the present invention in a specific embodiment；
Fig. 7 is the decomposition state schematic diagram of lead leaf driving device corresponding to two layers of lead leaf in beam-defining clipper provided by the present invention；
Fig. 8 is status diagram when lead leaf driving device corresponding to two layers of lead leaf shown in Fig. 7 is installed；
Fig. 9 is the launched field formation basic theory schematic diagram of beam-defining clipper provided by the present invention.
In Fig. 1:
Lead leaf 1 '；
In Fig. 2-9:
Mounting base 1, power source 2, lead screw 3, nut 4, lead leaf 5, auxiliary rod 6, sliding part 7, positioning region 71, locating part 8, position
Set sensor 9, control unit 11, the first detection piece 12, the second detection piece 13, input gear 14, transmission gear 15, mounting plate
16, connecting plate 17, lead leaf actuator 10, lead leaf driving device 20.
Specific embodiment
The present invention provides a kind of lead leaf driving devices of beam-defining clipper, lead leaf actuator, can be realized the independence of each lead leaf
Driving, and then by control lead leaf formation rule or irregular launched field, preferably match with the shape of lesion.
The present invention also provides a kind of beam-defining clippers, have above-mentioned lead leaf driving device, are capable of forming and lesion shape phase
Similar launched field reduces radiation injury of the beam to healthy position.
Invention further provides a kind of electron linear accelerator, can according to the big minor adjustment dose of radiation of lesions position,
And then realize efficient diagnoses and treatment.
Below in conjunction with attached drawing, to beam-defining clipper provided by the present invention and its lead leaf driving device 20, lead leaf actuator 10 and
Electron linear accelerator with the beam-defining clipper is specifically introduced, so as to those skilled in the art's accurate understanding skill of the invention
Art scheme.
Axial direction as described herein is reference with the lead screw 3 of lead leaf actuator 10, the extending direction of the axial direction, that is, lead screw 3；
It is circumferential to surround axially direction；The extending direction of the diameter of lead screw 3 is radial.
Using the use state of beam-defining clipper as reference above and below as described herein, beam-defining clipper is in use, with the side perpendicular to ground
Under being to the direction for up and down direction, close ground, the direction far from ground is upper.
As described herein first, second equal words, only for distinguishing different structure or the same or similar difference portion of structure
Part does not indicate certain particular determination to sequence.
Signal connection as described herein refers to, realizes a kind of connection type of signal transmitting in a wired or wireless manner.
Launched field as described herein also referred to as radiates open country, refers to the range for wishing the position irradiated on patient body-surface, herein
Refer to the visual field that permission beam passes through defined by lead leaf.
As shown in Figures 2 and 3, the present invention provides a kind of lead leaf actuators 10 of beam-defining clipper, for realizing in beam-defining clipper
The driving of one of lead leaf 5, the lead leaf actuator 10 include mounting base 1, lead screw 3 and nut 4, lead screw 3 and 2 phase of power source
Even, nut 4 is bolted in lead screw 3, and power source 2 drives lead screw 3 to rotate, so that lead screw 3 drives nut 4 to rotate along lead screw 3, nut
4 move axially while rotation along lead screw 3；Mounting base 1 is axially connected with nut 4, is circumferentially rotatably connected, and will installation
Seat 1 and one of lead leaf 5 of beam-defining clipper are connected, then while nut 4 is moved axially along lead screw 3, drive mounting base 1 along lead screw
3 axial movements realize the driving to lead leaf 5 to drive lead leaf 5 along the axial movement of lead screw 3 by mounting base 1；Moreover, by
It is circumferentially rotatably connected in mounting base 1 with nut 4, mounting base 1 will not be circumferentially rotated with nut 4, to limit lead leaf 5
Circumferential movement ensure that the direction of motion of lead leaf 5.
As it can be seen that 3 nut 4 of lead screw is realized and one of lead leaf by mounting base 1 using lead leaf actuator 10 of the invention
5 independent connection, and then realize and the independence of single lead leaf 5 is driven, so that the movement of each lead leaf 5 is relatively independent；Relative to existing
There is the lead leaf 5 of symmetrical folding in technology, lead leaf actuator 10 of the invention makes the movement of each lead leaf 5 relatively independent, is not necessarily to
Depend on another lead leaf 5 of same layer；It, can by controlling the movement of each lead leaf 5 when the movement of each lead leaf 5 is relatively independent
To change the shapes and sizes of formed launched field between two lead leaves 5, to form the launched field similar with lesion shape；Each lead leaf 5
When moving relatively independent, so that the combining form of each 5 present position of lead leaf is more various, it can also adjust in a wider context
Launched field, it is particularly possible to realize the adjusting to launched field center, it, will be sick without passing through expansion launched field to convert launched field center according to lesion
Stove is included in coverage field, and the position of launched field can be converted according to lesion, is carried out accurately diagnoses and treatment to lesions position, is subtracted
Few radiation injury to healthy position.
In one embodiment, hydraulic power source, wind regime, gas source can also can be used using direct current generator as power source 2
Deng being used as power source 2, when the power source 2 of selection is different, different connection types can choose, to realize the biography of driving force
It passs.To realize the effective control moved to lead leaf 5, power source 2 can also include speed reducer.
Mounting base 1 is specifically as follows bearing block, is set in nut 4, and the reliability with 4 axially position of nut can be improved,
It is also possible that nut 4 is more smooth along the rotation of lead screw 3.When mounting base 1 is bearing block, can be set outer with bearing block
The connector being fixedly connected is enclosed, it is connected with lead leaf 5 to be realized by connector；For example, the conducts such as connecting plate 17 can be set
Connector can specifically make the radially extending in lead screw 3 of connecting plate 17, to form the connecting pin that can be connected with lead leaf 5.
Certainly, all structures with 4 axial restraint of nut, being circumferentially rotatably connected that can be realized can be used as mounting base
1, it is not limited to bearing block.
It is fixedly connected to realize with lead leaf 5, lead leaf actuator 10 of the invention can also include auxiliary rod 6 and sliding part
7, auxiliary rod 6 can be extended in the same direction with lead screw 3, can be parallel to the setting of lead screw 3；Sliding part 7 is slidably connected to auxiliary rod
6, can be set with auxiliary rod 6, and there is slidable gap between auxiliary rod 6, in other words, sliding part 7 and auxiliary rod 6 can
To be slidably matched, sliding part 7 is slid axially along auxiliary rod 6；Sliding part 7 can be connected with mounting base 1, and can be with
With the positioning region 71 for positioning lead leaf 5, it is fixedly connected with realizing with lead leaf 5, by the fixation of lead leaf 5, then mounting base 1 passes through
Sliding part 7 realizes connected with lead leaf 5.
When mounting base 1 is moved axially along lead screw 3, it will drive sliding part 7 and slide axially along auxiliary rod 6, and then drive lead
Leaf 5 moves axially.Since sliding part 7 slides axially along auxiliary rod 6, auxiliary rod 6 can Auxiliary support sliding part 7, and then provide
To the Auxiliary support detent force of lead leaf 5, the reliability of the movement of lead leaf 5 not only can be improved, reduces lead leaf 5 during the motion
Trembling, can also fight the gravity of lead leaf 5, protect lead leaf 5, mounting base 1, sliding part 7 etc..Moreover, sliding part 7 is along auxiliary
Sliding axially for bar 6 is helped, auxiliary rod 6 can also play the role of guide rod, be oriented to the movement of lead leaf 5, improve lead leaf 5
Kinematic accuracy.
In a preferred embodiment, positioning region 71 can have certain development length in the axial direction of lead screw 3, so as to
Match with the development length of lead leaf 5 in the axial direction.The axial length of positioning region 71 can be set, so that positioning region 71 is in axial direction
On development length not less than the development length in the axial direction of lead leaf 5 half.It is connect at this point, on the one hand can increase with lead leaf 5
Contacting surface product, avoids stress from concentrating；On the other hand, the connection reliability of positioning region 71 Yu lead leaf 5 can be improved, realize to lead leaf 5
Reliable location；Furthermore when the axial direction of lead leaf 5 is more preferably positioned, the fatigue deformation of lead leaf 5 can be reduced, extends lead leaf 5
Service life.
In Fig. 2 and embodiment shown in Fig. 3, the development length of positioning region 71 in the axial direction can be equal to lead leaf 5 and exist
Development length in axial direction realizes the reliable location to lead leaf 5.Positioning region 71 can be connected with a side of lead leaf 5, specifically may be used
It is connected with being parallel to axial a side with lead leaf 5.
Lead leaf 5 can be set to various shapes, when there is variation radially in the axial length of lead leaf 5, the axis of lead leaf 5
Refer to the maximum axial development length of lead leaf 5 to extending length.At this point, lead leaf 5 be used for the side that connect with positioning region 71 can be with
With certain axial length, the not preferably less than half of 5 greatest axial length of lead leaf, the development length of positioning region 71 in the axial direction
The side that can be used to connect with positioning region 71 with lead leaf 5 matches.
When being equipped with sliding part 7, mounting base 1 can be specifically connected by connector with sliding part 7, as described above, even
Fitting can have connecting pin, and sliding part 7 can be fixed on to the connecting pin of connector.Meanwhile connector be also provided with
The hole that is slidably connected that auxiliary rod 6 cooperates, by connector and 6 slidable connection of auxiliary rod.
Sliding part 7 it is various informative, can be sliding block, the structures such as sleeve.Especially, the positioning region 71 of sliding part 7 has
When certain axial extension, sliding part 7 can be set to being set in the sleeve outside auxiliary rod 6, by auxiliary rod 6 into
Row positioning.
The structure type of auxiliary rod 6 is also not necessarily limited to rod-shaped, can also be axis；Those skilled in the art, which can according to need, to be set
The concrete form of auxiliary rod 6 is set, also can according to need and auxiliary rod 6 and the mating surface of sliding part 7 are lubricated.
In another preferred embodiment, lead leaf actuator 10 of the invention can also include locating part 8, for limiting
The amount of exercise that lead leaf 5 processed is moved upwards in diminution launched field side, avoids two lead leaves 5 of same layer from colliding when moving toward one another, mentions
High operational safety.
It can be seen from background technology that beam-defining clipper has two lead leaves 5 in same layer, by the phase for adjusting two lead leaves 5
Control to formed launched field between two lead leaves 5 is realized to movement.When one of lead leaf 5 towards another lead leaf 5 move and
When another lead leaf 5 is static, the launched field between two lead leaves 5 will reduce；Conversely, when one of lead leaf 5 is far from another
When a movement of lead leaf 5 and another static lead leaf 5, the launched field between two lead leaves 5 will expand.Consequently, to facilitate retouching
It states, diminution launched field direction as described herein and expansion launched field direction are to be determined with the movement of driven lead leaf 5 for reference
Justice, the motion conditions of another lead leaf 5 are not considered；In other words, in two lead leaves 5 in same layer, a lead leaf 5 is close
The direction of another lead leaf 5 movement is the diminution launched field direction of the lead leaf 5, the side which moves far from another lead leaf 5
To the expansion launched field direction for being the lead leaf 5.If being referring to definition inward-outward direction, close to launched field center with the center of launched field
Direction be it is interior, far from launched field center direction be it is outer, lead leaf 5 inwardly movement then for diminution launched field direction movement, to outward transport
Dynamic is to expand the movement of launched field direction.
" layer " is according to vertical definition herein, is horizontal plane with vertical perpendicular plane definition, then each level
Face is equivalent to one layer, and the lead leaf 5 in same level is in same layer.
For ease of description, hereinafter being said by specific structure of the inward-outward direction defined above to lead leaf actuator 10
It is bright.It is appreciated that since the center of launched field is variation, it is inside and outside also to change with the variation at launched field center.
In a preferred embodiment, locating part 8 can be the elastic component connected with auxiliary member, such as rubber block, barrier
In one end that sliding part 7 inwardly moves, i.e. sliding part 7 is towards one end of beam；When lead leaf 5 moves to inner terminal, sliding part 7
It keeps out and contacts with elastic component formation, and then limit slippage part 7 continues inwardly to move, to realize the limit to lead leaf 5.Moreover,
It when locating part 8 is set as elastic component, can be buffered by Elastic Contact, to prevent Contact from generating strong collision
Impact, and then avoid the components such as damage mounting base 1, lead screw 3 and power source 2.
Locating part 8 it is various informative, can also for can barrier in the baffle of mounting base 1 or the inside of sliding part 7, with limitation
The amount of exercise that lead leaf 5 inwardly moves.The component cooperated with locating part 8 can be sliding part 7, can also and lead equal for mounting base 1
The other component that leaf 5 is fixedly connected.
Specifically, locating part 8 is used to limit the position that inner terminal can reach when lead leaf 5 inwardly moves, to prevent
Two lead leaves 5 collision in same layer.Since another lead leaf 5 in same layer also may be at motion state, therefore limit
Part 8 can be set to the adjustable structure in position, so that lead leaf 5 to be limited to different positions as needed.
Lead leaf actuator 10 of the invention can also include the position sensor 9 connecting with 2 signal of power source, for detecting
The extreme position that lead leaf 5 is moved upwards in expansion launched field side；Expand launched field direction when position sensor 9 detects that lead leaf 5 reaches
Extreme position when, i.e., when lead leaf 5 moves to outermost end, position sensor 9 will test signal and pass to power source 2, to move
Power source 2 stops driving, and lead leaf 5 is avoided to go beyond the limit of position, improves operational safety.
Incorporated by reference to Fig. 4, position sensor 9 can be U-shaped detection block, and U-shaped detection block can be connected in the end of lead leaf 5
Portion can specifically realize being connected for U-shaped detection block using connectors such as screw, pins.The U-shaped detection block can built-in photoelectric transfer
The component for detection such as sensor, is then arranged the shading piece to match with U-shaped detection block, is by the light of photoelectric sensor
No be blocked judges whether lead leaf 5 moves outwardly to extreme position.In detail, can be arranged in the two sides inner wall of U-shaped detection block
The light projector point A of photoelectric sensor is located therein side inner wall by miniature photoelectric sensor, is set to other side inner wall by luminous point B,
Then feedback areas is constituted between the two sides inner wall of U-shaped detection block, in light projector point A and by the region between luminous point B；Can with
Shading piece is arranged in the corresponding position of the extreme position that lead leaf 5 moves out, should when lead leaf 5 is moved out to extreme position
Shading piece, which can correspond to, to be placed in the opening of U-shaped detection block, blocks light projector point A and by the optical path between luminous point B, so that photoelectricity
Sensor generates the variation of electric signal, and then this signal is transferred to power source 2, so that power source 2 carries out deceleration, and
Driving is tapered off, so as to the slowly stop motion of lead leaf 5.
Position sensor 9 can also be other structures form, be not limited to U-shaped detection block, it is all in the prior art can be real
The structure of existing position detection can be used as the position sensor 9, and details are not described herein again.
Referring to FIG. 5, on the basis of the above, lead leaf actuator 10 of the invention can also include control unit 11, first
Detection piece 12 and the second detection piece 13, the first detection piece 12 and the second detection piece 13 are connect with 11 signal of control unit, and first
Detection piece 12 is used to detect the driving signal of power source 2, and the second detection piece 13 is used to detect the turn signal of lead screw 3；First inspection
It surveys part 12 and the second detection piece 13 is connect with 11 signal of control unit, so that driving signal and turn signal are passed to control
Unit 11；Control unit 11 adjusts the control signal for being sent to power source 2 according to driving signal and turn signal, to guarantee to lead
The driving accuracy of leaf 5.
At the same time it can also which the third detection piece connecting with 11 signal of control unit is arranged, for detecting whether lead leaf 5 reaches
Then target position will test signal and pass to control unit 11, so that the adjusting of control unit 11 is sent to the control of power source 2
Signal further increases driving accuracy.
Specifically, control unit 11 can demarcate the target position of lead leaf 5 when driving, control is then sent
Signal is to power source 2, so that power source 2 drives lead leaf 5 to reach the target position；The driving signal detected of first detection piece 12
And the turn signal detected of the second detection piece 13 can be used as feedback signal, for feeding back the physical location of lead leaf 5, control
Unit 11 processed can be according to the two signals it can be concluded that the physical location of lead leaf 5 and the deviation of target position, and then adjust hair
The control signal of power source 2 is given, to be corrected to position deviation, guarantees the accuracy of 5 final position of lead leaf；Meanwhile
Third detection piece can detecte whether lead leaf 5 reaches target position, and will test signal and feed back to control unit 11, to avoid lead
Leaf 5 moves carry, and lead leaf 5 is accurately driven to target position.As it can be seen that by the first detection piece 12, the second detection piece 13 and
Third detection piece realizes triple position feedbacks, is reliably controlled the position of lead leaf 5.
Wherein, the first detection piece 12 can be the encoder being connected with power source 2, when using motor as power source 2,
The encoder that can be carried for motor, it is not necessary that the first detection piece 12 is separately provided.Second detection piece 13 can be potentiometer, current potential
The input terminal of meter can be equipped with input gear 14, and lead screw 3 can be connected transmission gear 15, and transmission gear 15 is nibbled with input gear 14
It closes；When lead screw 3 rotates, transmission gear 15 is rotated with lead screw 3, and input gear 14 is driven to rotate, and potentiometer can pass through
The turn signal for detecting input gear 14, then converts according to input gear 14 and the transmission ratio of transmission gear 15, with
To the turn signal of lead screw 3.Third detection piece can be close switch, to detect whether lead leaf 5 approaches and reach target position.
It is appreciated that the structure type multiplicity of the first detection piece 12, the second detection piece 13 and third detection piece, is not limited to
The signal supervisory instruments such as concrete form, such as photoelectric sensor are stated, can be configured according to the prior art.Wherein, due to
The structure type of three detection pieces and setting position are more flexible, are explained herein and not in the drawings.
Below in conjunction with Fig. 6-8, beam-defining clipper of the invention and its lead leaf driving device 20 are described in detail.
The present invention also provides a kind of lead leaf driving devices 20, for driving two lead leaves 5 for being in same layer to move, packet
The lead leaf actuator 10 connecting respectively with two lead leaves 5 is included, each lead leaf actuator 10 respectively drives to carry out with corresponding lead leaf 5
Self-movement so that two lead leaves 5 are relatively close or separate, and then adjusts the launched field between two lead leaves 5.Wherein, lead leaf drives
Part 10 can be above-mentioned lead leaf actuator 10.
As described above, using above-mentioned lead leaf actuator 10 independent driving can be carried out to each lead leaf 5, so that each lead leaf 5
Movement it is relatively independent, and then adjust two lead leaves 5 between launched field, it is particularly possible to as needed adjust launched field center, thus
Better adapt to the lesion that position converts at any time, formed with the more matched launched field of lesion, in the same of efficient diagnosis and treatment
When, reduce the radiation injury to healthy position.
As shown in fig. 6, two lead leaf actuators 10 can phase when two lead leaves 5 of same layer are equipped with lead leaf actuator 10
So that the space between two lead leaf actuators 10 forms the rest area of two lead leaves 5 two lead leaves 5 are set side by side setting
It sets.Moreover, because two lead leaves 5 may be at the two sides of launched field, the direction of motion is usually on the contrary, therefore two lead leaf actuators 10 can be anti-
To setting；Using the orientation in Fig. 6 as reference, the power source 2 of one of lead leaf actuator 10 be can be set in left side, another
Right side can be arranged in the power source 2 of lead leaf actuator 10, and the extreme position that one of lead leaf 5 moves out is in a left side
Side, the extreme position that another lead leaf 5 moves out are in right side, that is to say, that two lead leaf actuators 10 are oppositely arranged.
When two lead leaf actuators 10 are all provided with position sensor 9 and auxiliary rod 6, to be fixed on the U-shaped inspection of 5 end of lead leaf
For block is surveyed as position sensor 9, the U-shaped detection block of two lead leaf actuators 10 can be corresponding with the auxiliary rod 6 of opposite side respectively,
So that two lead leaf actuators 10 are placed in the opening of U-shaped detection block of other side with respective auxiliary rod 6.As described above, U
The detection devices such as photoelectric sensor can be set in type detection block, and set respectively by the light projector of photoelectric sensor point A and by luminous point B
In the two sides inner wall of U-shaped detection block, auxiliary rod 6 at this time is equivalent to shading piece, can block light projector point A to the light by luminous point B
Road；When lead leaf 5 does not reach the extreme position of outermost end, auxiliary rod 6 is placed in always in the opening of U-shaped detection block, and optical path is always
It is blocked, when lead leaf 5 is moved out to the extreme position of outermost end, the opening of U-shaped detection block is detached from auxiliary rod 6, so that auxiliary
Bar 6 is helped no longer to block optical path, photoelectric sensor at this time generates the variation of photosignal, and then detects the pole of 5 outermost end of lead leaf
Extreme position.
As it can be seen that auxiliary rod 6 herein is equivalent to shading piece above, it is not necessary that shading piece is separately provided for U-shaped detection block,
Auxiliary rod 6 whether can be detached from by U-shaped detection block to detect lead leaf 5 in the extreme position for expanding the movement of launched field direction, i.e., most
The extreme position of outer end.Other detection devices can also be arranged in U-shaped detection block, be not limited to photoelectric sensor, as long as being able to detect
The presence or absence of auxiliary rod 6.
Incorporated by reference to Fig. 7 and Fig. 8, the present invention also provides a kind of beam-defining clippers, including lead leaf 5 and above-mentioned lead leaf driving device
20, to drive each 5 self-movement of lead leaf, so that the adjusting to launched field is realized in the movement cooperation by two lead leaves 5.
Especially, beam-defining clipper may include upper layer and lower layer lead leaf 5, and the direction of motion of two layers of lead leaf 5 can intersect, specifically may be used
With substantially vertical, so that upper layer and lower layer lead leaf 5 mutually encloses, the shape and size of launched field are limited.As upper layer lead leaf 5 can be
Front-rear direction movement, lower layer's lead leaf 5 can move in left and right directions, and then are enclosed substantially by upper layer and lower layer lead leaf 5
Rectangular launched field.The front-rear direction and left and right directions using beam-defining clipper use state as reference, are mutually perpendicular in horizontal plane
Both direction.
For the lead leaf driving device 20 of upper layer and lower layer lead leaf 5, the structure of each lead leaf actuator 10 may each be phase
Same or similar, those skilled in the art can carry out the arrangement mode of lead leaf actuator 10 according to the direction of motion of lead leaf 5
It reasonably adjusts, to realize two layers of lead leaf 5 that the direction of motion can intersect.For the lead leaf driving device 20 of every layer of lead leaf 5,
Each lead leaf actuator 10 can be oppositely arranged, and also can be reversed arrangement, can be adjusted according to the needs each lead leaf actuator 10
Position.That is, beam-defining clipper can specifically include four lead leaf actuators 10, two lead leaves of driving same layer lead leaf 5 are driven
Moving part 10 can form a lead leaf driving device 20, and the lead leaf driving device 20 of the upper and lower cooperates, common to adjust
Shape, size and the position of launched field, preferably to be matched with lesion.
Moreover, in compared with the existing technology V-shape lead leaf, every layer of lead leaf 5 can be set to rectangular in the present invention
On the one hand tabular can preferably control the shape, size and position of launched field such as rectangle or square, on the other hand
The convenience that the driving of lead leaf 5 can also be improved, is better controlled the movement of lead leaf 5, and then the positioning for improving lead leaf 5 is quasi-
True property and precision, form, size matched launched field similar with lesion shape.
As shown in figure 8, the mounting plate 16 between upper layer and lower layer lead leaf 5 can also be arranged in beam-defining clipper, it is bilevel
Lead leaf 5 and lead leaf driving device 20 can be installed on the mounting plate 16, to realize positioning.Mounting plate 16 can be fixed on limit
Beam device, each lead leaf actuator 10 can be set the bracket of installation and positioning, on the one hand can fix power source 2, lead screw
3, the components such as auxiliary rod 6, on the other hand, can be realized by bracket with the connection of mounting plate 16, and then by each lead leaf actuator
10 are both secured to mounting plate 16, to form unified lead leaf driving structure.
Referring to FIG. 9, beam-defining clipper of the invention realizes the launched field of beam-defining clipper since the movement of each lead leaf 5 is relatively independent
Structure change, the size range of maximum launched field can achieve 50cm × 50cm, the size range of minimum launched field can for 2cm ×
2cm.With the center lines M such as maximum launched field division, using the direction of motion of upper layer lead leaf 5 as X-direction, the movement side of lower layer's lead leaf 5
It can according to need the center for changing launched field, according to arrow in Fig. 9 since the movement of each lead leaf 5 is relatively independent to for Y direction
Direction shown in head is moved；That is, beam-defining clipper of the invention, both may be implemented the symmetrical movement of lead leaf 5, it can also
To realize that the asymmetric of lead leaf 5 moves, the lead leaf 5 of both direction can be mobile or separate etc. simultaneously towards equal center lines M
Center is mobile, can also each 5 single movement of lead leaf be more than equal center lines M certain distance, such as 3.5cm.This structure design is not
Irregular field can be only formed, to meet the detection demand of different size lesions, can also be realized to 5 movement position of lead leaf
Accurate control.
The present invention also provides a kind of electron linear accelerators, have above-mentioned beam-defining clipper.When X-ray beam passes through limit beam
When device is irradiated to the lesions position of patient, using the lead leaf driving device 20 of beam-defining clipper, the lead leaf 5 for controlling beam-defining clipper is moved, with
The launched field with patient's lesions position analogous shape is formed, the lesions position of patient is enable to receive the x-ray dose of meet demand,
Avoid patient health position by the radiation injury of X-ray.
The component for including in view of electron linear accelerator and beam-defining clipper is more, and the structure of each component is also complex, herein
Only its lead leaf driving device, lead leaf actuator and associated components are illustrated, place does not please refer to existing skill to the greatest extent for other
Art, details are not described herein again.
Above to beam-defining clipper provided by the present invention and its lead leaf driving device, lead leaf actuator, with the electricity of the beam-defining clipper
Sub- linear accelerator is described in detail.Specific case used herein carries out the principle of the present invention and embodiment
It illustrates, the above description of the embodiments is only for helping to understand the core idea of the present invention.It should be pointed out that for the art
Those of ordinary skill for, without departing from the principle of the present invention, can also to the present invention carry out it is several improvement and repair
Decorations, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (14)
1. a kind of lead leaf actuator of beam-defining clipper, which is characterized in that including mounting base (1), the lead screw being connected with power source (2)
(3) and it is bolted in the nuts (4) of the lead screw (3), one of lead leaf (5) of the mounting base (1) and beam-defining clipper is connected, and
It with the nut (4) axial restraint, is circumferentially rotatably connected, to drive the lead leaf (5) to move along the axial direction of the lead screw (3)
It is dynamic；
Further include the position sensor (9) being connect with the power source (2) signal, is penetrated for detecting the lead leaf (5) in expansion
The extreme position of movement on wild direction drives the lead leaf (5) to exceed the extreme position to avoid the power source (2)；
The position sensor (9) includes the U-shaped detection block and shading piece for being fixed on lead leaf (5) end, by described U-shaped
Whether the lead leaf (5) described in the shading piece occlusion detection is expanding the limit that moves upwards of launched field side to the light that detection block issues
Position.
2. lead leaf actuator as described in claim 1, which is characterized in that further include auxiliary rod (6) and with the auxiliary rod (6)
The sliding part (7) being slidably connected, the auxiliary rod (6) extend in the same direction with the lead screw (3), and the sliding part (7), which has, to be used for
The positioning region (71) of the lead leaf (5) is positioned, the mounting base (1) and the sliding part (7) are connected.
3. lead leaf actuator as claimed in claim 2, which is characterized in that in the axial direction of the lead screw (3), the positioning region
(71) development length is not less than the lead leaf (5) in the half of direction development length.
4. lead leaf actuator as claimed in claim 2, which is characterized in that further include locating part (8), for limiting the lead leaf
(5) amount of exercise moved upwards in diminution launched field side.
5. lead leaf actuator as claimed in claim 4, which is characterized in that the locating part (8) is to be fixed on the auxiliary rod
(6) elastic component, barrier is in the sliding part (7) towards one end of beam.
6. lead leaf actuator as described in any one in claim 1-5, which is characterized in that further include control unit (11), first
Detection piece (12) and the second detection piece (13), first detection piece (12) and second detection piece (13) with the control
The connection of unit (11) signal, the two are respectively used to detect the rotation letter of the driving signal of the power source (2) and the lead screw (3)
Number, so that described control unit (11) is sent to the power source (2) according to the driving signal and turn signal adjusting
Control signal.
7. lead leaf actuator as claimed in claim 6, which is characterized in that first detection piece (12) be and the power source
(2) connected encoder；
And/or second detection piece (13) is potentiometer, the potentiometric input terminal is equipped with input gear (14), described
Lead screw (3) is fixed with transmission gear (15), and the transmission gear (15) is engaged with the input gear (14).
8. lead leaf actuator as claimed in claim 6, which is characterized in that further include being connect with described control unit (11) signal
Third detection piece, for detecting whether the lead leaf (5) reaches target position.
9. the lead leaf driving device of a kind of beam-defining clipper, for driving the two lead leaves (5) for being in same layer to move, which is characterized in that
Including the lead leaf actuator (10) being connect respectively with the two lead leaves (5), each lead leaf actuator (10) respectively drive with respectively
Self-corresponding lead leaf (5) self-movement, so that the two lead leaves (5) are relatively close or separate, to adjust the two lead leaves
(5) launched field between；The lead leaf actuator (10) is the described in any item lead leaf actuators (10) of the claims 1-8；
The two lead leaf actuators (10) are oppositely arranged, and each lead leaf actuator (10) all has in the same direction with the lead screw (3)
The auxiliary rod (6) of extension；
The two U-shaped detection blocks are corresponding with the auxiliary rod (6) of opposite side respectively, and by whether are detached from the auxiliary rod (6)
Detect the extreme position that the lead leaf (5) moves upwards in expansion launched field side.
10. lead leaf driving device as claimed in claim 9, which is characterized in that the U-shaped detection block is built-in with photoelectric sensing
Device, the light projector point of the photoelectric sensor and the two sides inner wall that the U-shaped detection block is respectively placed in by luminous point, the auxiliary rod
(6) the light projector point can be blocked to the optical path by luminous point.
11. a kind of beam-defining clipper, including lead leaf (5) and lead leaf driving device (20), which is characterized in that the lead leaf driving device
It (20) is the described in any item lead leaf driving devices (20) of the claims 9-10.
12. beam-defining clipper as claimed in claim 11, which is characterized in that including upper layer and lower layer lead leaf (5), and two layers of lead leaf
(5) direction of motion intersection.
13. beam-defining clipper as claimed in claim 12, which is characterized in that every layer of each lead leaf (5) is square tabular.
14. a kind of electron linear accelerator, which is characterized in that including the described in any item beam-defining clippers of the claims 11-13.
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| CN201610236662.8A CN105852901B (en) | 2016-04-15 | 2016-04-15 | Electron linear accelerator, beam-defining clipper and lead leaf driving device, actuator |
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| CN201610236662.8A CN105852901B (en) | 2016-04-15 | 2016-04-15 | Electron linear accelerator, beam-defining clipper and lead leaf driving device, actuator |
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