CN106621075A - Radiotherapy device - Google Patents
Radiotherapy device Download PDFInfo
- Publication number
- CN106621075A CN106621075A CN201611197083.3A CN201611197083A CN106621075A CN 106621075 A CN106621075 A CN 106621075A CN 201611197083 A CN201611197083 A CN 201611197083A CN 106621075 A CN106621075 A CN 106621075A
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- radiotherapy
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- 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
- A61N5/1028—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy using radiation sources applied onto the body
-
- 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
- A61N2005/1094—Shielding, protecting against radiation
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention relates to the radiotherapy field, and provides a radiotherapy device comprising the following units: a main support; a therapy arm and a therapy head, wherein one end of the therapy arm is fixed on one side of the main support and the other end extends outwards, and the therapy head is fixed on the other end of the therapy arm and used for outputting a beam; an electromagnetic shielding unit at least partially located on the beam path, the electromagnetic shielding unit comprises a conductor and is used for shielding electromagnetic waves. The radiotherapy device can shield electromagnetic interferences, and can neglect radio field and light field influences in the same time.
Description
Technical field
The present invention relates to field of radiation therapy, more particularly to a kind of radiotherapy dress that electromagnetic radiation can be shielded
Put.
Background technology
With the development of linear accelerator, the increase of precision is treated, electron linear accelerator is played in treating cancer field
More and more important effect, it passes through to produce X-ray and electric wire, direct irradiation is carried out to the tumour in patient's body, so as to reach
To the purpose for eliminating or reducing tumour.The especially appearance of the electron linear accelerator of guide of magnetic resonant image so that lung, chest
Portion etc. is possibly realized with the accurate treatment of respirometric organ.
But whether being that electron linear accelerator or magnetic resonance equipment all have electromagnetic field, can cause to interfere with each other, example
High-intensity magnetic field such as magnetic resonance equipment may affect the normal work of the electronic component in electron linear accelerator, electronic line of sight to add
Electromagnetic field in fast device may affect the uniformity and stability of field strength distribution in magnetic resonance equipment.Accordingly, it would be desirable to seek one
Plant the electromagnetic interference that solution can be reduced effectively between electron linear accelerator and miscellaneous equipment.
The content of the invention
To overcome the deficiencies in the prior art, the invention provides a kind of radiotherapy unit, including：Main body rack；Treatment
The side of the main body rack is fixed in arm and treatment head, one end of the treated arms, and the other end stretches out, the treatment head
The other end of the treated arms is fixed on, the treatment head is used for output beam；Electromagnetic shielding unit, is at least partially disposed at described
On the path of beam.
Optionally, the electromagnetic shielding unit includes first area and second area, and the first area is located at described penetrating
On the path of beam, the second area is located at outside the path of the beam.
Optionally, the maximum launched field of the size correspondence radiotherapy unit of the first area.
Optionally, the electromagnetic shielding unit includes conductor, for shielding to electromagnetic wave.
Optionally, in the first area, there is interval between conductor.
Optionally, in the first area, conductor is distributed into grid.
Optionally, the first area inner conductor structure is different from the second area inner conductor structure.
Optionally, the radiotherapy unit also includes cross hair, and the conductor and the cross hair stagger setting.
Optionally, the cross hair and the conductor are integrated on a transparent substrate.
Optionally, the electromagnetic shielding unit includes the conductor of multiple layers of different materials.
Relative to prior art, the radiotherapy unit that the present invention is provided is also carried out electromagnetic screen in the beam window that goes out for the treatment of head
Cover, external environment or other devices not only can be reduced by electromagnetic interference of the window to radiotherapy unit, can also subtract
The electromagnetic interference that few radiotherapy unit passes through the window environment or other devices to external world；
Further, the radiotherapy unit that the present invention is provided to electromagnetic interference while shielding to launched field and light
Wild impact can be ignored；
Further, the radiotherapy unit that the present invention is provided not only can be in the premise for having little influence on launched field and light field
Under electromagnetic interference is shielded, and do not interfere with school carried out to the geometric center of imaging receiver system using crosshair
Just.
Description of the drawings
In order to be illustrated more clearly that technical scheme, below will be to wanting needed for embodiment or description of the prior art
The accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, right
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining it according to these accompanying drawings
Its accompanying drawing.
Fig. 1 is the structural representation of radiotherapy unit provided in an embodiment of the present invention；
Fig. 2 (a)-(b) is the structural representation of electromagnetic shielding unit provided in an embodiment of the present invention；
Fig. 3 is the schematic bottom view of electromagnetic shielding unit provided in an embodiment of the present invention；
Fig. 4 is the schematic bottom view of the electromagnetic shielding unit that another embodiment of the present invention is provided；
Fig. 5 is the bottom surface that unit is electromagnetically shielded in the embodiment of the present invention and the schematic diagram that cross hair is integrated.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
The radiotherapy unit that the present invention is provided is carried out in the case where launched field and light field is had little influence on to electromagnetic interference
Effectively shielding, is particularly suited for the radiotherapy unit of guide of magnetic resonant image.In order to preferably illustrate to technical scheme,
Here carries out clear, complete description by taking linear accelerator as an example to technical scheme, but with this does not limit this
Bright protection domain.
Fig. 1 is the structural representation of radiotherapy unit provided in an embodiment of the present invention.With reference to shown in Fig. 1, radiotherapy
Device includes linear accelerator 10, sick bed 20.The linear accelerator 10 is used to produce the beam of high level (such as megavolt level)
(electron beam or X-ray), so as to treat to target area (including tumour), it includes main stand 11, treated arms 12 and treatment head
13, the main stand 11 can be around the rotation (as shown in Figure 1) of rotary shaft A, so as to realize the treatment of different angles, the treatment
The side of main stand is fixed in one end of arm 12, and the other end stretches out, and inside has for electronics to be accelerated to into high energy
Accelerating tube, the treatment head 13 is fixed on the other end of treated arms 12, for carrying out Energy distribution regulation, conformal tune to beam
Section, dose monitoring etc..The linear accelerator 10 can also include (the Electronic Portal of electronic portal image device 14
Imaging Device, abbreviation EPID), it is imaged for receiving beam, such as in radiation therapy process, using EPID realities
When receive beam be imaged, such that it is able to real-time verification put position.The linear accelerator 10 is not by the disclosed limit of the present embodiment
System, its beam that can also produce KV level is used to be imaged target area.
The sick bed 20 is used to carry patient, and target area is moved to into the isocenter point O of linear accelerator 10 (such as Fig. 1 institutes
Show), the treatment head 13 to patient sends beam (such as pencil-beam, axle B is as shown in Figure 1 for beam centre), so as to enter to patient
Row treatment.
Accelerating tube is used to bag in high energy, treatment head 13 will be accelerated under microwave electric field effect from electron gun injected electrons
Containing multiple precise parts, such as example of primary collimator, expansion device, ionisation chamber, tungsten door, multi-leaf optical grating etc., for carrying out energy to beam
Amount profile adjustment, conformal regulation, dose monitoring etc..The built-in function for the treatment of head 13 is realized depending on the portions such as motor, electronic component
Part, and the part such as motor, electronic component is easily disturbed by electromagnetic wave, while electromagnetic interference itself is also produced, therefore in order to
The interference of the interference of environment or the electromagnetic wave of other devices to these electronic components to external world of these electronic components is reduced, this
The radiotherapy unit of bright proposition also includes electromagnetic shielding unit 15, and the electromagnetic wave for environment to external world or other devices is carried out
Shielding；And also can weaken or avoid electromagnetic interference of the radiotherapy unit to other electromagnetic susceptible devices.
Treatment head 13 includes the window for going out beam, does not consider to carry out electromagnetic screen to the window for going out beam in the prior art
Cover, cause electromagnetic wave to cause electromagnetic interference to electronic component in treatment head 13 or external environment by the window.Inventor
It has been investigated that, the window that treatment head 13 is used to beam is also carried out being electromagnetically shielded the effect that can be effectively improved electromagnetic shielding.
In the present embodiment, the electromagnetic shielding unit 15 surrounds accelerating tube and treatment head 13, surrounds herein and refers to
Treatment head 13 be used at the window of beam be also provided be electromagnetically shielded unit.Under normal circumstances, radiotherapy unit includes housing, electricity
Magnetic shield unit 15 can be arranged at the enclosure interior, and accelerating tube and treatment head 13 are surrounded.Preferably, will be electromagnetically shielded
Unit 15 is fixed on the enclosure interior, so as in radiation therapy process, even if main body rack 11 rotates around rotary shaft A, and electricity
Magnetic shield unit 15 will not also occur relative movement, it is to avoid collide with the part in accelerating tube and/or treatment head 13, it is to avoid
Produce unnecessary loss.Electromagnetic shielding unit 15 can be fixed on the enclosure interior by routine techniques means, and it is fixed
Mode is unrestricted in the present invention.In other embodiments, if the inner member for the treatment of head 13 need not carry out electromagnetism
Shielding, then being electromagnetically shielded unit 15 need to surround the part for needing shielding.
Electromagnetic shielding unit 15 includes conductor, for being electromagnetically shielded.Fig. 2 is electromagnetic screen provided in an embodiment of the present invention
Cover the structural representation of unit.With reference to shown in Fig. 2, electromagnetic shielding unit 15 is one layer of conductor, shown in such as Fig. 2 (a), such as electromagnetism
Screen unit 15 is metal screen layer or screening conductive paint, and the screening conductive paint is a kind of paint that can be used to spray, and is dried
Being formed can play the effect of conduction after paint film, so as to the function with shielding electromagnetic interference, the screening conductive paint can be sprayed
In shell inner surface, electromagnetic interference can be solved the problems, such as, and it is simple to operate, take up room it is little；Electromagnetic shielding unit 15
The conductor of multiple layers of different materials can be included, shield effectiveness can be strengthened, Fig. 2 (b) illustrate only electromagnetic shielding unit 15 to be included
The number of plies of conductor is not limited by the present embodiment disclosure in two-layer conductor 151 and 152, but the present invention.
In order to increase the stability of electromagnetic shielding unit 15, in other embodiments, electromagnetic shielding unit 15 can also be wrapped
Substrate is included, the conductor is fixed on the substrate.Conductor can be arranged on substrate side, it is also possible to be arranged on the both sides of substrate,
Or be arranged between two layers of substrate, as long as substrate can play the fixed effect that supports to conductor, the present invention is not to conductor and base
The relative position and combined process at bottom is defined.
In the present embodiment, electromagnetic screen 15 can be an entirety, or multiple independent sectors.In order to pacify
Dress is convenient, the preferably several independent sector of electromagnetic screen 15.Electromagnetic screen 15 install after, can be with abutment joint at
Processed, prevented the leakage of electromagnetic wave.
As can be seen here, the radiotherapy unit that the present embodiment is provided not only can reduce external environment or other devices to putting
The electromagnetic interference of therapeutic system is penetrated, the electromagnetic interference of radiotherapy unit environment or other devices to external world can also be reduced.
Because treatment head 13 is treated for output beam to patient, therefore it is required that electromagnetic shielding unit 15 is to electromagnetic wave
While shielding, the transmission of beam is not affected.
It will be seen from figure 1 that the beam for treatment is electromagnetically shielded unit 15 through part, the part is referred to as electricity by here
The bottom surface of magnetic shield unit 15.Fig. 3 is the schematic bottom view of the electromagnetic shielding unit that one embodiment of the invention is provided.With reference to Fig. 3
It is shown, the region being located on course of the beam in electromagnetic shielding unit 15 is referred to as into first area 15a, by electromagnetic shielding unit 15
Other regions are referred to as second area 15b (including non-base surface area).Because the beam for treatment is through first area 15a, it is
Cause first area 15a that the distribution of intensity of beam in launched field is not affected while effectively shielding is carried out on electromagnetic interference, if
The thickness for putting first area 15a is sufficiently thin so that its decay to intensity of beam is substantially negligible.Under the conditions of different application, first
Requirements of the region 15a to the attenuation rate of intensity of beam may be different, and first area 15a can require to arrange suitable according to specific
Thickness.
First area 15a is preferably dimensioned to be the size of correspondence beam, due in radiation therapy process, the shape of beam
May be continually changing with size, therefore the full-size of the size correspondence beam of first area 15a can be set, in this enforcement
In example, the maximum launched field of the size correspondence radiotherapy unit of first area 15a, that is to say, that first area 15a is at the center of grade
Projection size in plane is consistent with maximum launched field on central plane is waited.In other embodiments, first area 15a is in waiting
Projection size in heart plane is not less than the maximum launched field waited on central plane, is arranged such, in radiation therapy process,
No matter how the shape and size of beam change, beam will not be irradiated to second area all in the range of the 15a of first area
15b, therefore, the thickness of second area 15b is without the need for considering the impact to beam, as long as can weaken electromagnetic interference to expected
Degree.
First area 15a internal conductor materials can be with identical with the conductor material in second area 15b, it is also possible to differs,
Preferably, the material of first area 15a can be conductor material that is little to beam attenuation or not blocking beam, second area
The material of 15b is without the need for considering the impact to beam.
As can be seen here, the radiotherapy unit in the present embodiment while shielding to electromagnetic interference to the shadow of beam
Sound can be ignored, so as to the impact to the dosage distribution in patient's body can be ignored.
Because launched field directly cannot be concluded by visual observation, therefore general all sign using the light field consistent with launched field is penetrated
Open country, facilitates physics teacher to check and judge the accuracy of launched field.Therefore, in the present embodiment, first area 15a does not affect light field.
With continued reference to shown in Fig. 3, in the 15a of first area, there is interval 16 between conductor, for allowing visible light-transmissive.At the interval
16 can allow visible light-transmissive while need to meet the requirement that shields electromagnetic interference, the size and electromagnetism for being spaced 16 is done
The frequency disturbed is relevant, according to the size at the set of frequency of electromagnetic wave to be shielded interval 16 so that first area 15a can in transmission
The electromagnetic wave of the frequency can effectively be shielded while seeing light, if the electromagnetic wave with multiple frequencies, can basis
The most short electromagnetic wave of wavelength arranges the size at interval 16.
In the present embodiment, the distribution not to conductor is defined, and it can be distributed for grid, such as shown in Fig. 3, also may be used
Think other distributions, such as the dot matrix distribution in Fig. 4, as long as it meets first area 15a can carry out effectively to electromagnetic interference
Shielding.If also including the substrate for supporting conductor in the 15a of first area, base material is preferably transparent material,
Such as plastics, glass etc., so as to reduce the impact to light field as far as possible.
In the present embodiment, impacts of the second area 15b without the need for consideration to light field, therefore, second area 15b inner conductor structures
Can be with identical with first area 15a inner conductor structures, it is also possible to differ.For example, first area 15a inner wires along treatment head and
Treated arms extends, and treatment head and treated arms are surrounded into shielding so that in first area 15a and second area 15b adjacent conductor it
Between have interval；Or, there is interval in the 15a of first area between adjacent conductor, second area 15b inner wires are continuous distributed
Conductor.
As can be seen here, the radiotherapy unit in the present embodiment while shielding to electromagnetic interference to the shadow of light field
Sound can be ignored, consequently facilitating physics teacher checks and judge the accuracy of launched field.
In radiotherapy unit, cross hair can be installed in the bottom for the treatment of head 13, for imaging receiver system (for example
EPID geometric center) is corrected.The position of imaging receiver system geometric center need to keep one with the course of the beam of X-ray
Cause, i.e. the geometric center of the projection centre of cross hair and imaging receiver system is consistent, and radiotherapy position may be caused if inconsistent
Put and error occur, cause patient health tissue to be taken as the danger that tumor tissues receive larger dose.In order to not affect using fork
Silk is corrected to the geometric center of imaging receiver system, and the conductor and cross hair in the present embodiment staggers settings, i.e. when using pitching
When silk is corrected to the geometric center of imaging receiver system, the projection of conductor and cross hair on central plane is waited will not be overlapped,
Therefore still whether can be overlapped to imaging receiver system according to the geometric center of the projection centre of cross hair and imaging receiver system
Combination center be corrected.
The bottom surface of electromagnetic shielding unit 15 can integrate with cross hair.Cross hair has a various shapes, such as crosshair,
X-type cross hair, T-shaped cross hair, L-type cross hair etc., in the present embodiment, are introduced by taking crosshair as an example, but are not limited with this
Protection scope of the present invention.
Fig. 5 is the bottom surface that unit is electromagnetically shielded in the embodiment of the present invention and the schematic diagram that cross hair is integrated.With reference to shown in Fig. 5,
The bottom surface of electromagnetic shielding unit and cross hair are integrated on treatment head chassis, and by treatment head chassis radiotherapy unit is installed on
On.The electromagnetic shielding unit includes first area 25a and second area 25b, in wherein first area 25a, in transparent substrates
There is interval 26 between upper setting conductor grid 251 and crosshair 252, and adjacent conductor 251, it is saturating for beam and visible ray
Cross, so as to form launched field and light field on central plane is waited；Second area 25b need not consider beam and visible ray, can be to lead
Volume mesh, or the conductor of continuous distributed.As shown in figure 5, on a transparent substrate, the center of crosshair 252 is still located at
On beam centre axle B, and conductor grid 251 and crosshair 252 stagger setting, so as to while electromagnetic shielding, hardly
Affect the correction to imaging receiver system geometric center.
In other embodiments, being electromagnetically shielded the bottom surface of unit and cross hair can be not integrated into together, and both can be respectively
It is independently installed to treatment head chassis.
As can be seen here, the radiotherapy unit in the present embodiment not only can be in the premise for having little influence on launched field and light field
Under electromagnetic interference is shielded, and do not interfere with school carried out to the geometric center of imaging receiver system using crosshair
Just.
Above disclosed is only several preferred embodiments of the present invention, can not limit the present invention's with this certainly
Interest field, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (10)
1. a kind of radiotherapy unit, including
Main body rack；
The side of the main body rack is fixed in treated arms and treatment head, one end of the treated arms, and the other end stretches out, institute
The other end that treatment head is fixed on the treated arms is stated, the treatment head is used for output beam；
Electromagnetic shielding unit, is at least partially disposed on the path of the beam.
2. radiotherapy unit as claimed in claim 1, it is characterised in that the electromagnetic shielding unit include first area and
Second area, the first area is located on the path of the beam, and the second area is located at outside the path of the beam.
3. radiotherapy unit as claimed in claim 2, it is characterised in that the size correspondence radiotherapy of the first area
The maximum launched field of device.
4. radiotherapy unit as claimed in claim 2, it is characterised in that the electromagnetic shielding unit includes conductor, is used for
Electromagnetic wave is shielded.
5. radiotherapy unit as claimed in claim 4, it is characterised in that in the first area, between having between conductor
Every.
6. radiotherapy unit as claimed in claim 4, it is characterised in that in the first area, conductor is distributed into grid.
7. radiotherapy unit as claimed in claim 4, it is characterised in that the first area inner conductor structure and described
Two region inner conductor structures are different.
8. radiotherapy unit as claimed in claim 4, it is characterised in that also including cross hair, the conductor and the cross hair
Stagger setting.
9. radiotherapy unit as claimed in claim 8, it is characterised in that the cross hair and the conductor are integrated in transparent base
On bottom.
10. radiotherapy unit as claimed in claim 1, it is characterised in that the electromagnetic shielding unit includes that multilayer is different
The conductor of material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611197083.3A CN106621075B (en) | 2016-12-22 | 2016-12-22 | Radiotherapy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611197083.3A CN106621075B (en) | 2016-12-22 | 2016-12-22 | Radiotherapy device |
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|---|---|
| CN106621075A true CN106621075A (en) | 2017-05-10 |
| CN106621075B CN106621075B (en) | 2021-01-08 |
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|---|---|---|---|
| CN201611197083.3A Active CN106621075B (en) | 2016-12-22 | 2016-12-22 | Radiotherapy device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107315923A (en) * | 2017-08-14 | 2017-11-03 | 上海联影医疗科技有限公司 | A kind of system and method for adjusting Medical Devices |
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| CN106621075B (en) | 2021-01-08 |
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