CN110193146A - Shield for Proton therapy system - Google Patents
Shield for Proton therapy system Download PDFInfo
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- CN110193146A CN110193146A CN201910649044.XA CN201910649044A CN110193146A CN 110193146 A CN110193146 A CN 110193146A CN 201910649044 A CN201910649044 A CN 201910649044A CN 110193146 A CN110193146 A CN 110193146A
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- rotary frame
- therapy system
- proton therapy
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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
- A61N5/103—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
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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
- A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
- A61N2005/1087—Ions; Protons
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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
- A61N2005/1092—Details
- A61N2005/1094—Shielding, protecting against radiation
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- Biomedical Technology (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Radiation-Therapy Devices (AREA)
Abstract
The present invention relates to a kind of shield for Proton therapy system, which is by the multi-chamber structure of shielding wall construction, including synchrotron room, rotary frame room；The synchrotron room and the rotary frame room are interconnected；The rotary frame room is divided into the upper rotary frame room on top and the lower rotary frame room of lower part, and frame slot is offered between the upper rotary frame room and the lower rotary frame room, and rotary frame is arranged through the frame slot；The upper rotary frame room and the synchrotron room are interconnected into a chamber.Rotary frame room and synchrotron room of the invention is interconnected, and is not provided with barrier shield, reduces shield construction cost.
Description
Technical field
The present invention relates to radiation protection technology field, especially a kind of shield for Proton therapy system.
Background technique
Proton therapeutic is known as that curative effect is best, the least tumor therapeuticing method of side effect by the whole world, and possesses 360 degree of rotations
Favourable turn frame can make proton beam in the case where patient does not move, and accurately bombard patient's from multiple angles according to optimal path
Knub position, it is time-consuming less, less to the injury of health tissues, while it is further types of so that proton therapeutic technology is applied to
Oncotherapy.
In the acceleration rotary course of proton, the particle radiation of a large amount of harmful public healths can be generated.Based on radiation protection
Optimization criteria, the builder of Proton therapy system should reduce radiation caused by Proton therapy system to the greatest extent, to reduce to public affairs
Many and environment influence.
In the prior art, with the Proton therapy system of rotary frame, it is generally disposed at the large size constructed by concrete
In building；But existing radiation shield can not all carry out conformal design according to the dose of radiation for the treatment of system, but use
Overprotection is radiated with shield as big as possible, as thick as possible to reduce, and space hold is big, and construction cost is also high.Shield
Material category and thickness determine cost, and with the miniaturization of synchrotron, commercial medical Proton therapy system is come
It says, designs that a kind of economic and practical and safely and effectively shield is extremely urgent.
Summary of the invention
The applicant provides a kind of structurally reasonable for proton therapeutic system for the disadvantage in above-mentioned existing production technology
The shield of system, so as to carry out specific aim shielding for the radiation of Proton therapy system, while reaching optimized protection
About cost reduces space hold.
The technical solution adopted in the present invention is as follows:
A kind of shield for Proton therapy system, the shield are the multi-chamber structure by shielding wall construction, including
Synchrotron room, rotary frame room；
The synchrotron room and the rotary frame room are interconnected；
The rotary frame room is divided into the upper rotary frame room on top and the lower rotary frame room of lower part, the upper whirler
Frame slot is offered between frame room and the lower rotary frame room, rotary frame is arranged through the frame slot；The upper rotation
Rack room and the synchrotron room are interconnected into a chamber.
As a further improvement of the above technical scheme:
The shield further includes therapeutic room, and divider wall is equipped between the upper rotary frame room and the therapeutic room.
The shield further includes labyrinth room, and the labyrinth room is set to the side of the upper rotary frame room, and with institute
Therapeutic room is stated to be interconnected；
The labyrinth room is equipped with labyrinth import and labyrinth exports, and the labyrinth import is in communication with the outside, the labyrinth outlet
It is interconnected with the therapeutic room.
The shield further includes canyon, and the canyon and the lower rotary frame room are interconnected.
The barrier shield is concrete layer structure.
The thickness range of the concrete layer is 0.5-3.5m.
The barrier shield is composite shielding wall construction, and the composite shielding wall includes concrete layer and is coated on concrete layer
On the iron material bed of material.
The thickness range of the concrete layer is 0.5-3m.
The thickness range of the iron material bed of material is 15-120cm.
The thickness value of the iron material bed of material of the rotary frame room is greater than the iron material of the synchrotron room
The thickness value of the bed of material.
Beneficial effects of the present invention are as follows:
Structure of the invention is compact, reasonable, easy to operate, and rotary frame room and synchrotron room are interconnected, do not set
There is barrier shield, is equipped with divider wall (not being barrier shield) between rotary frame room and therapeutic room, reduces shield construction cost.
The present invention carries out conformal structure design and thickness design to shield, enables shield with the smallest space
Reach protection purpose, while also saving construction cost, is conducive to business promotion；Shield of the invention uses concrete and iron
Material is shielding material, can be further reduced the thickness setting of shield, reduce the occupied space of shield.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the Proton therapy system that the embodiment of the present invention one provides.
Fig. 2 is the structural schematic diagram that each chamber of shield provided by Embodiment 2 of the present invention is splitted.
Fig. 3 is the dose distribution map on shield intermediate cross-section provided by Embodiment 2 of the present invention.
Fig. 4 is the dose distribution map among shield provided by Embodiment 2 of the present invention on longitudinal section.
Fig. 5 is the structural schematic diagram that each chamber of shield that the embodiment of the present invention three provides is splitted；
Fig. 6 is the dose distribution map on the shield intermediate cross-section that the embodiment of the present invention three provides；
Fig. 7 is the dose distribution map on the shield centre longitudinal section that the embodiment of the present invention three provides；
Fig. 8 is the Radiation dose distribution that the Proton therapy system in the case of different barrier shields is arranged in the embodiment of the present invention four
Figure；
Fig. 9 is the effect schematic diagram of scanning treatment head and target body in the embodiment of the present invention four.
In figure:
1- Proton therapy system；
11- injector；12- synchrotron；13- ejector；14- rotary frame；15- scanning treatment head；
2- target body；
3,3 '-shield；
31,31 '-synchrotron room；32,32 '-rotary frame room；321,321 '-go up rotary frame room；322,322 '-
Lower rotary frame room；323,323 '-frame slot；33,33 '-therapeutic room；34, the labyrinth 34 '-room；35,35 '-canyon；
4- concrete layer；The 5- iron material bed of material.
Specific embodiment
Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in figs. 1-9, the shield for Proton therapy system of the present embodiment, the shield 3 are by barrier shield
The multi-chamber structure of building, including synchrotron room 31, rotary frame room 32；
Synchrotron room 31 and rotary frame room 32 are interconnected；
The lower rotary frame room 322 of upper rotary frame room 321 and lower part for top, upper whirler are divided in rotary frame room 32
Frame slot 323 is offered between frame room 321 and lower rotary frame room 322, rotary frame is arranged through frame slot 323；Upper rotation
Rack room 321 and synchrotron room 31 are interconnected into a chamber.
Shield 3 further includes therapeutic room 33, and divider wall is equipped between upper rotary frame room 321 and therapeutic room 33.
Shield 3 further includes labyrinth room 34, and labyrinth room 34 is set to the side of rotary frame room 321, and and therapeutic room
33 are interconnected；
Labyrinth room 34 is equipped with labyrinth import and labyrinth exports, and labyrinth import is in communication with the outside, labyrinth outlet and therapeutic room 33
It is interconnected.
Shield 3 further includes canyon 35, and canyon 34 and lower rotary frame room 322 are interconnected.
Barrier shield is 4 structure of concrete layer.
The thickness range of concrete layer 4 is 0.5-3.5m.
Barrier shield is composite shielding wall construction, and composite shielding wall includes concrete layer 4 and the iron that is coated on concrete layer 4
Material layer 5.
The thickness range of concrete layer 4 is 0.5-3m.
The thickness range of the iron material bed of material 5 is 15-120cm.
The thickness value of the iron material bed of material 5 of rotary frame room 32 is greater than the thickness of the iron material bed of material 5 of synchrotron room 31
Value.
Embodiment one:
The present embodiment provides a kind of shields for Proton therapy system, as shown in Figure 1, the Proton therapy system 1 is
360 ° of rotary frame Proton therapy systems include sequentially connected injector 11, synchrotron 12, ejector 13, rotation
Favourable turn frame 14 and scanning treatment head 15.Proton is injected into synchrotron 12 by injector 11, by synchrotron 12 4
Spinning up for a dipolar magnet obtains energy formation proton beam, and proton beam is guided to by the extraction magnet of ejector 13
In rotary frame 14, projected by scanning treatment head 15 to (the i.e. patient of target body 2 via after three dipolar magnets of rotary frame 14
Lesion), complete treatment.Wherein, proton beam the dipolar magnet of synchrotron 12, extraction magnet, rotary frame 14 three
Biggish beam loss can occur on a second level magnet and scanning treatment head 15, generate stronger radiation energy, therefore, into
Need to pay close attention to the radiation protection in these regions when the design of row radiation shield.
As shown in Fig. 2, shield 3 generally shields the multi-chamber structure of wall construction, including synchrotron room 31, rotation
Rack room 32, therapeutic room 33, labyrinth room 34 and canyon 35.Wherein, injector 11, synchrotron 12 and ejector 13 are set
It is placed in synchrotron room 31, rotary frame 14 is set in rotary frame room 32, and scanning treatment head 15 and target body 2, which are located at, to be controlled
It treats in room 33, canyon 35 is used to place the electrical equipment of Proton therapy system 1.
Synchrotron room 31 and rotary frame room 32 are interconnected, and are not provided with any shielding construction, become one it is whole
The chamber of body, such setting can save space, decrease the waste of shielding material.Additionally, due to rotary frame 14 vertical
Direction the space occupied is larger, and rotary frame room 32 can be divided into upper rotary frame room 321 and the lower rotary frame of lower part on top
Room 322, offers frame slot 323 between upper rotary frame room 321 and lower rotary frame room 322, rotary frame runs through the machine
Rack slot 323 is arranged；The shape and structure of frame slot 323 is designed according to the structure of rotary frame 14, avoids excessive radiation again
It is appeared by lower rotary frame room 322.Upper rotary frame room 321 is interconnected with synchrotron room 31.
Divider wall (not showing in figure) is equipped between rotary frame room 32 and therapeutic room 33, which can be simple
Wall body structure, can be used the isolated materials such as plank, plastic plate manufacture, without using concrete manufacture, i.e., divider wall need to only rise
Purpose is isolated to therapeutic room 33 and rotary frame room 32.This isolation design of rotary frame room 32 and therapeutic room 33 can be with
The manufacturing cost for saving shield, avoids the waste of excessive shielding material.
Labyrinth room 34 is set to the side of rotary frame room 321, and is interconnected with therapeutic room 33, facilitates operator
Therapeutic room 33 is entered by labyrinth, patient is helped to position and treat.Labyrinth room 34 is equipped with labyrinth import and labyrinth exports, labyrinth
Import be set to labyrinth outside, be in communication with the outside, labyrinth outlet with therapeutic room 33 be interconnected, operator by labyrinth import into
Enter in labyrinth, and therapeutic room 33 is entered to by labyrinth outlet.
Canyon 35 is set to the side of the lower section of labyrinth room 34, lower rotary frame room 322, is used to place in canyon 35
The electrical equipment of entire Proton therapy system 1, is interconnected between equipment Room 35 and lower rotary frame room 322, and being used for will be electrical
Equipment is connect with all parts of Proton therapy system 1.
Embodiment two:
Shield 3 as described in embodiment one, barrier shield are concrete layer 4, the height and volume of each chamber according to
The structure size of 1 each section of Proton therapy system is designed, but the present embodiment can provide the specific wall about the shield 3
The lower limit value of thick size, the lower limit value according to be located at the shield 3 in Proton therapy system 1 use when greatest irradiation amount into
The conformal setting of row.
As shown in the coordinate system in Fig. 2, the direction of up or down described in the present embodiment is Z-direction, left or right side
To for Y direction, front or rear direction is X-direction, to understand.
Specifically, the upper wall thickness and lower wall thickness of synchrotron room 31 are set as 2m, synchrotron room 31
Left wall thickness is set as 2m, and wherein the thickness of left wall lower part can be thickeied to 3m, to obtain safer shield effectiveness.
The lower wall thickness of upper rotary frame room 321 is also configured as 2m, and upper wall is set as 2m with a thickness of 3m, right wall thickness,
For upper rotary frame room 321 and labyrinth room to be isolated；Wherein, thickness of the right wall close to the part of rear side is set as 3m.
Entire synchrotron room 31 and the antetheca of upper rotary frame room 321 and the thickness of rear wall are set as 3m.
The lower wall of the as upper rotary frame room 321 of the upper wall of lower rotary frame room 322, the side wall of lower rotary frame room 322,
Antetheca and rear wall thickness are 2m, and lower wall is with a thickness of 3m.
Upper wall, lower wall, right wall and the rear wall thickness of labyrinth room 34 are disposed as 1m, and its anterior wall thickness is set as 2m.
In order to further enhance the radiation protection ability of upper rotary frame room 321, in the outside of upper 321 right wall of rotary frame room
On be equipped with one layer of barrier shield, which is located at the top of labyrinth room 34, and thickness is set as 0.5m.
The upper wall of canyon 35 is the lower wall of labyrinth room 34, and canyon 35 and lower rotary frame room 322 pass through lower rotation
The right wall of rack room 322 is isolated, and antetheca, rear wall, lower wall and the right wall thickness of canyon 35 are 0.5m.
For the standard of dose of radiation, the requirement of national standard GB18871-2002 is: occupational exposure annual dose is less than 20mSv,
Public Exposure annual dose is less than 1mSv.And the design object of shield 3 provided by the present embodiment is that occupational exposure annual dose is small
In 5mSv, it is the 1/4 and 1/10 of national standard respectively that Public Exposure annual dose, which is less than 0.1mSv, specific as shown in table 1:
1 radiation dose standard of table (unit: mSv/ is annual)
It is designed for the specific wall thickness of the above shield 3, carries out 3 amount of radiation of shield distribution according to special Rocca algorithm is covered
Sunykatuib analysis, the structure of shield 3 and the design of thickness for verifying this implementation can satisfy radiation protection requirement.In the present embodiment
The extraction proton limit of power of Proton therapy system 1 is 70-230MeV, the strong 2nA of max-flow, when calculating according to proton therapeutic system
The max-flow of system 1 is analyzed by force, is selected equivalent dose (unit mSv) to compare and analyze, is obtained spoke as shown in Figure 3-4
Penetrate dose distribution map.
Fig. 3 is the dose distribution map on 3 intermediate cross-section of shield, and the lower section of Fig. 3 is the diagram of dosage distribution values,
Mark is there are three normal line thereon, from left to right respectively 0.1mSv, 1mSv and 5mSv, correspondingly sketches out in distribution map each
The line graph of standard, it can be seen that each normal line has nearly all been fallen on the side wall of shield 3, wherein outermost curve
For the dosage line of 0.1mSv, intermediate curve is the dosage line of 1mSv, innermost curve is the dosage line of 5mSv, it was demonstrated that the screen
Covering body 3 can be with the standard of radiation-screening to 0.1mSv.I.e. the shield 3 had both been able to satisfy in national standard to occupational staff and the public
Dose of radiation standard limit is also able to satisfy the present embodiment to the standard limit of dose of radiation.
Fig. 4 is the dose distribution map on the intermediate longitudinal section of shield 3, and the lower section of Fig. 4 is the diagram of dosage distribution values,
Mark is there are three normal line thereon, from left to right respectively 0.1mSv, 1mSv and 5mSv, correspondingly sketches out in distribution map each
The line graph of standard, it can be seen that each normal line has nearly all been fallen on the side wall of shield 3, wherein outermost curve
For the dosage line of 0.1mSv, intermediate curve is the dosage line of 1mSv, innermost curve is the dosage line of 5mSv, it was demonstrated that the screen
Covering body 3 can be with the standard of radiation-screening to 0.1mSv.I.e. the shield 3 had both been able to satisfy in national standard to occupational staff and the public
Dose of radiation standard limit is also able to satisfy the present embodiment to the standard limit of dose of radiation.
Each wall thickness of shield 3 is designed selection all in accordance with minimum value in the present embodiment, when it is implemented, can be with
It is carried out thickening processing according to the height of account valuation and actual demand, the present embodiment is only limitted to provide one according to proton therapeutic system
The wall thickness lower limit value that the max-flow of system 1 is designed by force.
Embodiment three
The present embodiment is to provide a kind of 3 ' of shield, essentially identical with 3 structure of shield in embodiment two, but with reality
It applies unlike the shield 3 in example two, the composite shielding wall that 3 ' of the shield is formed using concrete layer 4 and the iron material bed of material 5
To construct chamber structure.
In the case where using composite shielding wall, the height and volume of each chamber are still according to 1 each section of Proton therapy system
Structure size be designed, since iron material is good shielding material, be coated with the anti-spoke of the composite shielding wall of iron material
Penetrate that ability is stronger, the combination of concrete material and iron material can reduce the thickness of shielded layer, therefore under each chamber wall thickness
Limit value can change, but the lower limit value carries out conformal setting still according to the radiation profiles of Proton therapy system 1.
In the present embodiment, composite shielding wall is coated on 4 inner wall of concrete layer using the iron material bed of material 5 and is formed, and according to spoke
The distribution of dosage is penetrated, the iron material bed of material 5, area only more in dose of radiation are coated on not all concrete layer 4
The cladding of the domain progress iron material bed of material 5.It should be noted that if the wall thickness of 3 ' of shield mentioned below is without especially saying
It is bright, refer both to the integral thickness of barrier shield, even only simple concrete layer 4, then wall thickness is just the thickness of concrete layer 4；If
It is composite shielding wall, then wall thickness is just the integral thickness of concrete layer 4 and the iron material bed of material 5, and is designed for iron material thickness of feed layer
There is corresponding special instruction.
As shown in figure 5, the upper wall and lower wall thickness of 31 ' of synchrotron room are set as 2m, a left side of 31 ' of synchrotron room
Wall thickness is set as 2m, and wherein the lower part of left wall is coated with the iron material bed of material 5, and the iron material bed of material 5 is with a thickness of 30cm, the iron material bed of material 5
Instead of the concrete layer 4 of increased 1m thickness herein originally, but it can reach identical shield effectiveness, so that synchrotron room
The left wall of 31 ' is 2m.A length of 700cm, width 600cm are coated on the lower wall of 31 ' of synchrotron room, with a thickness of 60cm's
Rectangular iron material layer 5.
The upper wall and lower wall thickness of upper 321 ' of rotary frame room is disposed as 2m, and right wall thickness is set as 2m, for every
From upper 321 ' of rotary frame room and 34 ' of labyrinth room；Wherein, 100cm is coated on the side wall of the upper wall of upper 321 ' of rotary frame room
The iron material bed of material 5, the concrete layer 4 of original 1m thickness increased herein can be substituted；The right wall of upper 321 ' of rotary frame room is close
The part of rear side is coated with the iron material bed of material 5 of 50cm, for substituting the concrete layer 4 of the 1m thickness designed originally herein.
The upper wall of 322 ' of lower rotary frame room is the lower wall of upper 321 ' of rotary frame room, the side of 322 ' of lower rotary frame room
Wall thickness is 2m, and lower wall wall thickness is 2m.The iron material bed of material of 50cm thickness is wherein coated on the side wall of lower 322 ' of rotary frame room
5, it is coated with the iron material bed of material 5 of 60cm thickness in the right part of its lower wall, such setting can be by lower 322 ''s of rotary frame room
Lower wall effectively reduces the thickness of 1m.
Entire 31 ' of synchrotron room and the antetheca of upper 321 ' of rotary frame room and the thickness of rear wall are set as 2m, more in fact
The setting that wall thickness in example two is 3m is applied, entire wall thickness reduces one third, because in 31 ' of synchrotron room and upper whirler
The iron material bed of material 5 is coated on the antetheca and rear wall of 321 ' of frame room.Specifically, the iron material bed of material 5 is in 31 ' rear wall of synchrotron room
On be set as 50cm, be set as 20cm on 31 ' antetheca of synchrotron room；But the iron material bed of material 5 is in upper rotary frame room
It is 100cm that the thickness being arranged on 321 ' rear walls, which increases, is set as 70cm, main cause on upper 321 ' antetheca of rotary frame room
It is the dose of radiation according to Fig. 3 middle dosage normal line, on the antetheca and rear wall of upper 321 ' of rotary frame room compared with synchrotron
The antetheca of 31 ' of room and the dosage of rear wall are more, it is therefore desirable to the thickness that the thickness of the upper 321 ' iron material bed of material 5 of rotary frame room is arranged
A bit.
Upper wall thickness, lower wall thickness, right wall and the rear wall thickness of 34 ' of labyrinth room is disposed as 1m, and its anterior wall thickness
It is set as 2m.
In order to further enhance the radiation protection ability of upper 321 ' of rotary frame room, in the right wall of upper 321 ' of rotary frame room
One layer of barrier shield is equipped on outer wall, which is located at the top of 34 ' of labyrinth room, and thickness is set as 0.5m.
The upper wall of 35 ' of canyon is the lower wall of 34 ' of labyrinth room, and the lower wall and right wall thickness of 35 ' of canyon is 0.5m,
35 ' of canyon is isolated with 322 ' of lower rotary frame room by the right wall of lower 322 ' of rotary frame room.
It is less due to radiating the dosage in 35 ' of 34 ' of labyrinth room and canyon, 35 ' of canyon and fan are directed in the present embodiment
The iron material bed of material 5 is no longer arranged in 34 ' of palace.
It according to embodiment two, designs for the specific wall thickness of 3 ' of shield in the present embodiment, is calculated using special Rocca is covered
Method carries out the sunykatuib analysis of the 3 ' amount of radiation of shield distribution, verifies the structure of 3 ' of shield of the present embodiment and the design of thickness
It can satisfy radiation protection requirement, when calculating is still analyzed by force according to the max-flow of Proton therapy system, obtains as shown in fig. 6-7
Radiation dose profile.
Fig. 6 is the dose distribution map on the 3 ' intermediate cross-section of shield, and the lower section of Fig. 6 is the figure of dosage distribution values
Show, mark is there are three normal line thereon, from left to right respectively 0.1mSv, 1mSv and 5mSv, correspondingly sketches out in distribution map
The line graph of each standard, it can be seen that each normal line has still nearly all been fallen on the side wall of 3 ' of shield, wherein most
The curve in outside is the dosage line of 0.1mSv, and intermediate curve is the dosage line of 1mSv, and innermost curve is the dosage line of 5mSv,
Demonstrating 3 ' of the shield can be with the standard of radiation-screening to 0.1mSv, needless to say the standard of 1mSv and 5mSv.That is the screen
It covers 3 ' of body and had both been able to satisfy in national standard dose of radiation standard limit to occupational staff and the public, be also able to satisfy the present embodiment to spoke
Penetrate the standard limit of dosage.
Fig. 7 is the dose distribution map among 3 ' of the shield on longitudinal section, and the lower section of Fig. 7 is the figure of dosage distribution values
Show, mark is there are three normal line thereon, from left to right respectively 0.1mSv, 1mSv and 5mSv, correspondingly sketches out in distribution map
The line graph of each standard, it can be seen that each normal line has nearly all been fallen on the side wall of 3 ' of shield, wherein outermost
Curve be 0.1mSv dosage line, intermediate curve be 1mSv dosage line, innermost curve be 5mSv dosage line, it was demonstrated that
The shield 3 ' can be with the standard of radiation-screening to 0.1mSv, needless to say the standard of 1mSv and 5mSv.That is the shield
3 ' be both able to satisfy in national standard the dose of radiation standard limit to occupational staff and the public, were also able to satisfy the present embodiment to radiation agent
The standard limit of amount.
It can be seen that be designed using the composite shielding wall for being coated with the iron material bed of material 5, it can be by corresponding 3 ' of shield
Wall thickness reduce at least one third so that the wall thickness of 3 ' of entire shield is more uniform, in the premise for not reducing shield effectiveness
Under, reduce the occupied space of 3 ' of shield.
Each wall thickness of 3 ' of shield and the thickness of the iron material bed of material 5 are according to Proton therapy system in the present embodiment
The minimum value that max-flow is designed by force, when it is implemented, can be thickened according to the height and actual demand of account valuation
Processing, the present embodiment are only limitted to provide a lower limit value.
Example IV
It mentions, is interconnected between rotary frame room 32 and synchrotron room 31, and not set shielding in embodiment one
Wall.The purpose of the present embodiment is that providing a kind of verifying, no matter verifying is using which kind of shielding material isolation 32 He of rotary frame room
Synchrotron room 31, for target body 2, surrounding dose of radiation will not be efficiently reduced.
The sunykatuib analysis that 3 amount of radiation of shield is distributed is carried out according to special Rocca algorithm is covered.Specifically, according to matter when calculating
The max-flow of sub- treatment system 1 is analyzed by force, selects effective dose (unit Gy) to compare and analyze, and pay close attention to and sweep
Retouch the dose of radiation near treatment head 15 and target body 2.
The radiation dose profile of Proton therapy system 1 as shown in Figure 8, respectively illustrates rotary frame 32 from left to right
Barrier shield, the barrier shield equipped with 10cm concrete layer 4 are not provided between room and synchrotron room 31 and equipped with being mixed by 5cm
In the case where the composite shielding wall that solidifying soil layer 4 and the 2cm iron material bed of material 5 form, the Radiation dose distribution of Proton therapy system 1.Such as
Shown in Fig. 9, scanning treatment head 15 carries out the transmitting of proton stream to target body 2, on the direction emitted perpendicular to scanning treatment head 15,
Three points (as point A1, B1, C1) at selected distance target body 2 center 15cm, 50cm, 200cm carry out the extraction of dose value.
Specific value is as shown in table 2:
Radiation dose distribution (unit: Gy) under 2 different situations of table near target body
It can be obtained by list data, be not provided with barrier shield, barrier shield equipped with 10cm concrete layer and equipped with being mixed by 5cm
In the case of three kinds of the composite shielding wall that solidifying soil layer and the 2cm iron material bed of material 5 form, the dose of radiation variation around target body 2 is little,
Therefore no matter use which kind of shielding material that cannot effectively reduce the dose of radiation around target body 2, add for a kind of synchronization of embodiment
Fast device room 31 and rotary frame room 32 are set as integral type cavity body structure and provide support, and structure design can optimize shield
Structure, make shield miniaturization become a reality.
Above description is explanation of the invention, is not intended to limit the invention, and limited range of the present invention is referring to right
It is required that within protection scope of the present invention, any type of modification can be made.
Claims (10)
1. a kind of shield for Proton therapy system, it is characterised in that: the shield (3) is the multi-cavity by shielding wall construction
Cell structure, including synchrotron room (31), rotary frame room (32)；
The synchrotron room (31) and the rotary frame room (32) are interconnected；
The rotary frame room (32) is divided into the upper rotary frame room (321) on top and the lower rotary frame room (322) of lower part, institute
It states and offers frame slot (323) between rotary frame room (321) and the lower rotary frame room (322), rotary frame runs through
Frame slot (323) setting；The upper rotary frame room (321) and the synchrotron room (31) are interconnected into one
Chamber.
2. being used for the shield of Proton therapy system as described in claim 1, it is characterised in that: the shield (3) is also wrapped
It includes therapeutic room (33), divider wall is equipped between the upper rotary frame room (321) and the therapeutic room (33).
3. being used for the shield of Proton therapy system as claimed in claim 2, it is characterised in that: the shield (3) is also wrapped
Include labyrinth room (34), the labyrinth room (34) is set to the side of the upper rotary frame room (321), and with the therapeutic room
(33) it is interconnected；
The labyrinth room (34) is equipped with labyrinth import and labyrinth exports, and the labyrinth import is in communication with the outside, the labyrinth outlet
It is interconnected with the therapeutic room (33).
4. being used for the shield of Proton therapy system as claimed in claim 3, it is characterised in that: the shield (3) is also wrapped
It includes canyon (35), the canyon (34) and the lower rotary frame room (322) are interconnected.
5. being used for the shield of Proton therapy system as claimed in claim 4, it is characterised in that: the barrier shield is concrete
Layer (4) structure.
6. being used for the shield of Proton therapy system as claimed in claim 5, it is characterised in that: the concrete layer (4)
Thickness range is 0.5-3.5m.
7. the shield according to claim 4 for Proton therapy system, it is characterised in that: the barrier shield is compound
Wall construction is shielded, the composite shielding wall includes concrete layer (4) and the iron material bed of material (5) being coated on concrete layer (4).
8. the shield according to claim 7 for Proton therapy system, it is characterised in that: the concrete layer (4)
Thickness range be 0.5-3m.
9. the shield according to claim 8 for Proton therapy system, it is characterised in that；The iron material bed of material (5)
Thickness range be 15-120cm.
10. the shield according to claim 9 for Proton therapy system, it is characterised in that: the rotary frame room
(32) thickness value of the iron material bed of material (5) is greater than the thickness of the iron material bed of material (5) of the synchrotron room (31)
Angle value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317523.3A CN109200491A (en) | 2018-11-07 | 2018-11-07 | Shield for Proton therapy system |
| CN2018113175233 | 2018-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110193146A true CN110193146A (en) | 2019-09-03 |
Family
ID=64995220
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811317523.3A Pending CN109200491A (en) | 2018-11-07 | 2018-11-07 | Shield for Proton therapy system |
| CN201921136898.XU Active CN211188824U (en) | 2018-11-07 | 2019-07-18 | Shield for proton therapy system |
| CN201910649044.XA Pending CN110193146A (en) | 2018-11-07 | 2019-07-18 | Shield for Proton therapy system |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811317523.3A Pending CN109200491A (en) | 2018-11-07 | 2018-11-07 | Shield for Proton therapy system |
| CN201921136898.XU Active CN211188824U (en) | 2018-11-07 | 2019-07-18 | Shield for proton therapy system |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN109200491A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020093608A1 (en) * | 2018-11-07 | 2020-05-14 | 新瑞阳光粒子医疗装备(无锡)有限公司 | Shielding apparatus for proton therapy system |
-
2018
- 2018-11-07 CN CN201811317523.3A patent/CN109200491A/en active Pending
-
2019
- 2019-07-18 CN CN201921136898.XU patent/CN211188824U/en active Active
- 2019-07-18 CN CN201910649044.XA patent/CN110193146A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN211188824U (en) | 2020-08-07 |
| CN109200491A (en) | 2019-01-15 |
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