CN208975012U - A kind of high-precision energy slit for Proton therapy system - Google Patents
A kind of high-precision energy slit for Proton therapy system Download PDFInfo
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Abstract
The utility model relates to proton beam treatment technology, specially a kind of high-precision energy slit for Proton therapy system, high-precision energy slit for Proton therapy system, controllable beam cross section size, guarantee that the proton beam of target energy passes through, reduce proton beam loss, improve efficiency of transmission, including slit ontology (1), the shape of the slit ontology (1) is cuboid, the length L of the slit ontology (1) is 20-24cm, and the slit ontology (1) is 2g/cm by density3To 3g/cm3Graphite material be made, it is several that the slit ontology (1) is equipped with cylindrical slot (2), the center line of the cylindrical slot (2) is in the same plane, the spacing of adjacent column shape slit (2) is in 0.5cm to 1cm, the pore diameter range of the cylindrical slot (2) is 2mm to 10mm, it is coated with beryllium alumin(i)um alloy coating (3) in each cylindrical slot (2), the thickness of the beryllium alumin(i)um alloy coating (3) is no more than 0.1mm.
Description
Technical field
The utility model relates to proton beam treatment technology, and specially a kind of high-precision energy for Proton therapy system is narrow
Seam.
Background technique
Proton therapy is a kind of application prospect extensively and for the apparent novel radiation treatment technology of kinds cancer curative effect, at present in
State is also starting the research and development upsurge to proton therapy.Proton enters human body as positively charged particle, with high speed,
Since its speed is fast, the chance having an effect in vivo with normal tissue or cell is lower, when the privileged site for reaching cancer cell
When, speed reduces and stops suddenly, discharges ceiling capacity, generates the peak Bragg (peak Bo Lage) and kills cancer cell, while effectively
Protect normal tissue.Since proton therapy has, penetration performance is strong, dosage is distributed, local dose is high, side scatters less, penumbra is small
Etc. features, particularly with treatment have vital tissue organ wrap tumour, show biggish superiority.The adaptation of proton therapy
Disease is than wide, for brain innocent and malignant tumour, tumor of spinal cord, cranial vascular disease, head and neck neoplasm, Eye disease, thorax abdomen
Tumour, pediatric tumors and Other diseases etc. have a better effect.External clinical treatment statistics indicate that, proton therapy is to tumour
Effective percentage reach 95% or more, five-year survival rate is up to 80%, and it is best, secondary to be evaluated as curative effect by high-energy physics circle and medical field
Act on least treatment method.
Proton therapy treatment facility is usually made of single cyclotron and multiple therapeutic rooms, cyclotron generate with
It is selectively guided to the particle beam of one of various therapeutic rooms afterwards.The bunch energy level usually generated in cyclotron
For 230-250MeV, and proton therapy can be according to the required energy for selecting bunch situations such as tumor type, the radiotherapy angle of patient
Level is in 70-230MeV, so that the energy of particle is substantially deposited on the required position (i.e. treatment region) of patient's body.
Fig. 1 shows the prior art proton therapy rack of exemplary embodiment, which is designed to receive the particle beams
It flows and particle beam is re-directed to patient.As shown in Figure 1, rack 1a includes at least three bending magnet 2a-2c, by particle
Line 3a is re-directed to the treatment nozzle 4a of rack 1a, and is ultimately led into the patient 6a being located on therapeutic bed 5a.This permits
Perhaps particle beam 3a is selectively directed to patient 6a from any angle, and doctor's design is allowed to reduce to the maximum extent
Health tissues are caused with the treatment plan of undesired effect.In other words, shown in direction arrow 7a as shown in figure 1 like that, rack
It is typically suitable for around patient rotational, and it is vertical with the pivot center 8a of rack that bunch, which is redirected,.Therefore, nozzle 4a is treated
It can be rotated around patient 6a with particle beam 3a, particle beam 3a is enabled to penetrate the body of patient simultaneously in multiple positions
Treatment region is encountered from multiple directions.
In this therapeutic process, the selection of energy level and particle beam cross-sectional sizes is directly related to controlling for patient's body
Treat the radiotherapeutic effect in area.In general, cyclotron is by the high energy bunch for the standard that generates, then high energy bunch can according to need by
It selectively modifies for particular treatment.This reduces the adverse effect caused by health tissues to the maximum extent, and
The effect of increasing treatment.
Particle beam turn to and drop particle beam by degrader capable of all causing particle by being bent magnet
Beam energy loss and particle beam changes of section, so being sprayed to the particle beam after bending magnet and degrader in treatment
Section control and the energy screening that particle beam is carried out at mouth 4a are just particularly important.
For traditional radiotherapy technology by that can be carried out using collimator apparatus to the ray in hair treatment in currently available technology
Hair treats collimation, screening and the switching of ray, such as Chinese patent CN201010503162.9 discloses a kind of radiotherapy dress
It sets, radiation appliance and collimator apparatus, wherein collimator apparatus includes axially hollow collimation body, and the axially hollow collimation body has
At least one set of collimating aperture, the center line of each group of collimating aperture focus on a public focus, and the regularity of distribution of every group of collimating aperture with
The regularity of distribution of the radioactive source matches；Be rotatably arranged it is described it is axially hollow collimation body in switch body, for allow or
The radioactive ray are stopped to pass through the collimating aperture.
Above-mentioned utility model is by alignment stretched along center axis rotation, realizes the collimation to radioactive ray by rotation
And barrier, but proton beam is clearly inappropriate using aforesaid way, the reason is as follows that: one side proton beam passes through degrader
Afterwards, a big chunk proton beam has occurred that loss, and transmission loss is higher, so answering after line is by turning magnet
Unnecessary beam loss is avoided as far as possible.On the other hand, above-mentioned collimator apparatus controls ray for convenience, acts as a part of beam
The effect for flowing choking device, can stop line, so that beam transfer is cut off, but in proton therapeutic, range of the proton in substance
It is shorter, and there are bragg peaks, and energy is caused to deposit rapidly, if collimator takes into account the effect of line choking device, Shi Biyao
Increase water-cooling system, this will cause cost increase and difficult design.
In Proton therapy system, there is certain increasing in emittance and Energy distribution by the proton beam of degrader
Long, so currently available technology is there is an urgent need to a kind of design suitable for proton beam treatment, which can be in proton beam
The line that other energy other than target energy are filtered out after magnet of turning makes the proton beam of target energies more as far as possible
Pass through, reduces proton beam loss, improve efficiency of transmission, but not yet there is this design in currently available technology.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of for Proton therapy system
High-precision energy slit can control beam cross section size, guarantee that the proton beam of target energy passes through, and reduce proton beam damage
It loses, improves efficiency of transmission.
To realize the above technical purpose, the technical solution of the utility model is: a kind of for the high-precision of Proton therapy system
Energy slit, including slit ontology are spent, the shape of the slit ontology is cuboid, and the length L of the slit ontology is 20-
24cm, the slit ontology are 2g/cm by density3To 3g/cm3Graphite material be made, the slit ontology be equipped with cylinder
Slit is several, and in the same plane, the spacing of adjacent column shape slit is 0.5cm to 1cm to the center line of the cylindrical slot,
The pore diameter range of the cylindrical slot is 2mm to 10mm, is coated with beryllium alumin(i)um alloy coating in each cylindrical slot, described
The thickness of beryllium alumin(i)um alloy coating is no more than 0.1mm.
Preferably, the two side walls S of the slit ontology is equipped with aluminized coating, the thickness of the aluminized coating is not less than
1cm。
Preferably, the quantity of the cylindrical slot is five, respectively cylindrical slot one, cylindrical from bottom to top
Slit two, cylindrical slot three, cylindrical slot four and cylindrical slot five, the aperture of the cylindrical slot one are 2mm, institute
The thickness for stating the beryllium alumin(i)um alloy coating of one inner wall of cylindrical slot is no more than 0.01mm, and the aperture of the cylindrical slot two is
The thickness of 3mm, the beryllium alumin(i)um alloy coating of two inner wall of cylindrical slot are no more than 0.01mm, the hole of the cylindrical slot three
Diameter is 5mm, and the thickness of the beryllium alumin(i)um alloy coating of three inner wall of cylindrical slot is no more than 0.03mm, the cylindrical slot four
Aperture be 7.5mm, the thickness of the beryllium alumin(i)um alloy coating of four inner wall of cylindrical slot is no more than 0.05mm, the cylinder
The aperture of slit five is 10mm, and the thickness of the beryllium alumin(i)um alloy coating of five inner wall of cylindrical slot is no more than 0.1mm.
Preferably, the spacing and cylindrical slot two and cylinder of the cylindrical slot one and cylindrical slot two are narrow
The spacing of seam three is identical and be 1cm, the spacing and cylindrical slot four of the cylindrical slot three and cylindrical slot four with
The spacing of cylindrical slot five is identical and is 0.5cm.
Preferably, the quantity of the cylindrical slot is seven, respectively cylindrical slot one, cylindrical from bottom to top
Slit two, cylindrical slot three, cylindrical slot four, cylindrical slot five, cylindrical slot six and cylindrical slot seven, it is described
The aperture of cylindrical slot one is 1.2mm, and the thickness of the beryllium alumin(i)um alloy coating of one inner wall of cylindrical slot is no more than
0.01mm, the aperture of the cylindrical slot two are 2.2mm, the thickness of the beryllium alumin(i)um alloy coating of two inner wall of cylindrical slot
Degree is no more than 0.03mm, and the aperture of the cylindrical slot three is 3.5mm, and the beryllium alumin(i)um alloy of three inner wall of cylindrical slot applies
The thickness of layer is no more than 0.05mm, and the aperture of the cylindrical slot four is 5mm, and the aluminizing of four inner wall of cylindrical slot closes
The thickness of gold plating is no more than 0.1mm, and the aperture of the cylindrical slot five is 4mm, the beryllium of five inner wall of cylindrical slot
The thickness of aluminium alloy covered is no more than 0.05mm, and the aperture of the cylindrical slot six is 2mm, six inner wall of cylindrical slot
The thickness of beryllium alumin(i)um alloy coating be no more than 0.03mm, the aperture of the cylindrical slot seven is 1mm, the cylindrical slot seven
The thickness of the beryllium alumin(i)um alloy coating of inner wall is no more than 0.01mm.
Preferably, the spacing, cylindrical slot two and cylinder of the cylindrical slot one and cylindrical slot two are narrow
Stitch three spacing, cylindrical slot five and the spacing of cylindrical slot six and the spacing of cylindrical slot six and cylindrical slot seven
It is all the same and be 1cm, the spacing and cylindrical slot four of cylindrical slot three and cylindrical slot four and cylindrical slot five
Spacing is identical and is 0.5cm.
Preferably, further including magnetism servo-electric motor water-cooling, the magnetism servo-electric motor water-cooling is embedded on the another two side wall S` of slit ontology.
Preferably, the magnetism servo-electric motor water-cooling is ceramic coil pipe.
Preferably, the cylindrical slot includes inlet slot and exit slit, the edge of the inlet slot is arc
Shape chamfering, the radian of the arc angling are 170-160 degree, and the edge of the exit slit is right angle.
Preferably, it is 55~85% that mass ratio, which is beryllium content, in the beryllium alumin(i)um alloy coating, aluminium content is 15~
45%.
The high-precision energy slit for Proton therapy system of the utility model has the advantage that
1, the high-precision energy slit for Proton therapy system of the utility model is by carbon and beryllium to proton beam
The quantity of energy attenuation influence and particle influences, so that it is determined that at present in the energy of the proton beam suitable for 70-230MeV
When amount, the most suitable distance of high-precision energy slit, i.e. 20-24cm.
2, the high-precision energy slit for Proton therapy system of the utility model is by beryllium material to proton beam
Energy attenuation influences research, has obtained the proton beam for 70-230MeV, and the pore diameter range for cylindrical slot is 2mm
To 10mm (closest to the beam cross section diameter when treatment of reasonable proton beam), beryllium alumin(i)um alloy coating is designed in cylinder
On the inner wall of slit, the toxic pollutant of the beryllium not only effectively avoided, while can also be further using beryllium to proton beam
Attenuation characteristic, the further energy attenuation for reducing proton beam.
3, when by the thickness design of beryllium alumin(i)um alloy coating for no more than 0.1mm, the design of thickness can pass through plating
Mode is realized, the realizability of scheme is significantly increased.
4, pass through the regulative mode to proton beam cross section in the real process of proton beam therapy, being likely encountered, choosing
The energy slit for having devised three high-precisions, high-energy utilization rate, high collimation of selecting property.
5, by the chamfer design to inlet slot, to guarantee that the particle in proton beam can be as more as possible as far as possible
By energy slit, and effectively prevent energy attenuation.
6, by optimizing the spacing between multiple cylindrical slots, thus guarantee high-precision energy slit moved from
And when carrying out the selection between cylindrical slot, reduction proton beam as far as possible shoots the time on slit ontology, thus
It is further ensured that high-precision energy slit will not cause temperature to increase because long-time is irradiated by proton beam.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the proton therapy rack of the prior art.
Fig. 2 is the structural representation of the embodiment one of the high-precision energy slit for Proton therapy system of the utility model
Figure.
Fig. 3 is the section signal of the embodiment one of the high-precision energy slit for Proton therapy system of the utility model
Figure.
Fig. 4 is the structural representation of the embodiment two of the high-precision energy slit for Proton therapy system of the utility model
Figure.
Fig. 5 is the section signal of the embodiment two of the high-precision energy slit for Proton therapy system of the utility model
Figure.
Fig. 6 is the structural representation of the embodiment three of the high-precision energy slit for Proton therapy system of the utility model
Figure.
Fig. 7 is the section signal of the embodiment three of the high-precision energy slit for Proton therapy system of the utility model
Figure.
Fig. 8 is the energy attenuation and slit material of the high-precision energy slit for Proton therapy system of the utility model
Between relational graph one.
Fig. 9 is the energy attenuation and slit material of the high-precision energy slit for Proton therapy system of the utility model
Between relational graph two.
Figure 10 be the utility model the high-precision energy slit for Proton therapy system energy attenuation and slit away from
Relational graph between.
Appended drawing reference: the prior art: 1a, rack, 2a, turning magnet, 2b, turning magnet, 2c, turning magnet, 4a, treatment
Nozzle, 5a, therapeutic bed, 6a, patient, 7a, direction arrow, 8a, pivot center.
The utility model: 1, slit ontology, 2, cylindrical slot, 3, beryllium alumin(i)um alloy coating, 4, aluminized coating, 21, cylinder
Slit one, 22, cylindrical slot two, 23, cylindrical slot three, 24, cylindrical slot four, 25, cylindrical slot five, 26, circle
Cylindricality slit six, 27, cylindrical slot seven, 5, inlet slot, 6, exit slit.
Specific embodiment
The utility model is described as a kind of high-precision energy slit for Proton therapy system, including slit ontology 1
The shape of slit ontology 1 is cuboid, and the length L of the slit ontology 1 is 20-24cm, and the slit ontology 1 is by density
2g/cm3To 3g/cm3Graphite material be made, the slit ontology 1 be equipped with cylindrical slot 2 it is several, the cylinder is narrow
In the same plane, the spacing of adjacent column shape slit 2 is 0.5cm to 1cm, the hole of the cylindrical slot 2 to the center line of seam 2
Diameter range is 2mm to 10mm, is coated with beryllium alumin(i)um alloy coating 3, the beryllium alumin(i)um alloy coating 3 in each cylindrical slot 2
Thickness be no more than 0.1mm；The two side walls S of the slit ontology 1 is equipped with aluminized coating 4, and the thickness of the aluminized coating 4 is not low
In 1cm.Above scheme can be there are many embodiment:
Embodiment one: as shown in Figures 2 and 3, a kind of high-precision energy slit for Proton therapy system, including slit sheet
Body 1, the shape of the slit ontology 1 are cuboid, and the length L of the slit ontology 1 is 24cm, and the slit ontology 1 is by close
Degree is 3g/cm3Graphite material be made, the quantity of the cylindrical slot 2 is five, is from bottom to top respectively cylindrical narrow
Stitch one 21, cylindrical slot 2 22, cylindrical slot 3 23, cylindrical slot 4 24 and cylindrical slot 5 25, the cylinder
The aperture of shape slit 1 is 2mm, and the thickness of the beryllium alumin(i)um alloy coating 3 of one 21 inner wall of cylindrical slot is no more than
0.01mm, the aperture of the cylindrical slot 2 22 are 3mm, the beryllium alumin(i)um alloy coating 3 of 2 22 inner wall of cylindrical slot
Thickness is no more than 0.01mm, and the aperture of the cylindrical slot 3 23 is 5mm, and the aluminizing of 3 23 inner wall of cylindrical slot closes
The thickness of gold plating 3 is no more than 0.03mm, and the aperture of the cylindrical slot 4 24 is 7.5mm, the cylindrical slot 4 24
The thickness of the beryllium alumin(i)um alloy coating 3 of inner wall is no more than 0.05mm, and the aperture of the cylindrical slot 5 25 is 10mm, the circle
The thickness of the beryllium alumin(i)um alloy coating 3 of 5 25 inner wall of cylindricality slit is no more than 0.1mm；The cylindrical slot 1 and cylinder
The spacing and cylindrical slot 2 22 of slit 2 22 are identical as the spacing of cylindrical slot 3 23 and are 1cm, the cylinder
The spacing and cylindrical slot 4 24 of slit 3 23 and cylindrical slot 4 24 are identical and equal as the spacing of cylindrical slot 5 25
For 0.5cm.
Embodiment two: as shown in Figures 4 and 5, a kind of high-precision energy slit for Proton therapy system, including slit sheet
Body 1, the shape of the slit ontology 1 are cuboid, and the length L of the slit ontology 1 is 24cm, and the slit ontology 1 is by close
Degree is 3g/cm3Graphite material be made, the quantity of the cylindrical slot 2 is seven, is from bottom to top respectively cylindrical narrow
Stitch one 21, cylindrical slot 2 22, cylindrical slot 3 23, cylindrical slot 4 24, cylindrical slot 5 25, cylindrical slot
6 26 and cylindrical slot 7 27, the aperture of the cylindrical slot 1 is 1.2mm, one 21 inner wall of cylindrical slot
The thickness of beryllium alumin(i)um alloy coating be no more than 0.01mm, the aperture of the cylindrical slot 2 22 is 2.2mm, the cylinder
The thickness of the beryllium alumin(i)um alloy coating of 2 22 inner wall of slit is no more than 0.03mm, and the aperture of the cylindrical slot 3 23 is 3.5mm,
The thickness of the beryllium alumin(i)um alloy coating of 3 23 inner wall of cylindrical slot is no more than 0.05mm, the hole of the cylindrical slot 4 24
Diameter is 5mm, and the thickness of the beryllium alumin(i)um alloy coating of 4 24 inner wall of cylindrical slot is no more than 0.1mm, the cylindrical slot
5 25 aperture is 4mm, and the thickness of the beryllium alumin(i)um alloy coating of 5 25 inner wall of cylindrical slot is no more than 0.05mm, described
The aperture of cylindrical slot 6 26 is 2mm, and the thickness of the beryllium alumin(i)um alloy coating of 6 26 inner wall of cylindrical slot is no more than
0.03mm, the aperture of the cylindrical slot 7 27 are 1mm, the thickness of the beryllium alumin(i)um alloy coating of 7 27 inner wall of cylindrical slot
Degree is no more than 0.01mm；Spacing, cylindrical slot 2 22 and the cylinder of the cylindrical slot 1 and cylindrical slot 2 22
The spacing of shape slit 3 23, the spacing of cylindrical slot 5 25 and cylindrical slot 6 26 and cylindrical slot 6 26 and cylinder
The spacing of shape slit 7 27 is all the same and is 1cm, and cylindrical slot 3 23 and the spacing and cylinder of cylindrical slot 4 24 are narrow
It is identical as the spacing of cylindrical slot 5 25 and for 0.5cm to stitch 4 24.
Embodiment three: as shown in Figures 6 and 7, a kind of high-precision energy slit for Proton therapy system, including slit sheet
Body 1, the shape of the slit ontology 1 are cuboid, and the length L of the slit ontology 1 is 24cm, and the slit ontology 1 is by close
Degree is 2g/cm3Graphite material be made；The quantity of the cylindrical slot 2 is three, is from bottom to top respectively cylindrical narrow
One 21, cylindrical slot 2 22 and cylindrical slot 3 23 are stitched, the aperture of the cylindrical slot 1 is 1mm, the cylinder
The thickness of the beryllium alumin(i)um alloy coating of one 21 inner wall of shape slit is no more than 0.01mm, and the aperture of the cylindrical slot 2 22 is 3mm,
The thickness of the beryllium alumin(i)um alloy coating of 2 22 inner wall of cylindrical slot is no more than 0.03mm, the hole of the cylindrical slot 3 23
Diameter is 5mm, and the thickness of the beryllium alumin(i)um alloy coating of 3 23 inner wall of cylindrical slot is no more than 0.1mm；The cylindrical slot
1 and cylindrical slot 2 22 spacing and cylindrical slot 2 22 it is identical as the spacing of cylindrical slot 3 23 and be 1cm.
For embodiment one, two and three, when precision energy slit is being moved, to adjust the cross of proton beam
When cross-sectional sizes, proton beam can be shot on aluminized coating 4, and the heat so as to effectively change proton beam circulation carries out scattered
Heat can further include magnetism servo-electric motor water-cooling 7 to further guarantee heat dissipation effect, and the magnetism servo-electric motor water-cooling 7 is embedded in slit ontology 1
Another two side wall S` on, the magnetism servo-electric motor water-cooling 7 is ceramic coil pipe, and the inlet and outlet of ceramic coil pipe are connected with hose,
To carry out water flowing to ceramic coil pipe, and then water cooling is carried out to high-precision energy slit, embodiment one and embodiment two are due to opening
Hole number is more, so using 3g/cm3Graphite material be made, and the high-precision energy slit of embodiment three cylinder it is narrow
Negligible amounts are stitched, so using 2g/cm3Graphite material be made, above-mentioned graphite material density can protect after overtesting
Demonstrate,prove the rigidity of entire high-precision energy slit.
As shown in figure 8, common material when collimating at present to proton beam stream is aluminium (Al), beryllium (Be), carbon (C), carbon
Change boron (B4C), in test of the above-mentioned several materials to the energy attenuation of the proton beam of 70-230MeV, it has been found that
To the effect of the energy attenuation of proton beam, improve oneself to it is weak be successively aluminium, carbon, boron carbide and beryllium, proton beam energy attenuation pair
For proton therapeutic be it is more unfavorable, the effect mainly treated and reach when generating the peak Bragg in the intracorporal position of people
It sets, so we are for having carried out a large amount of research on material, the decaying of boron carbide is approximate with beryllium, but boron carbide hardness is higher,
Material is more crisp, the production to high-precision energy slit can not be realized in production technology, so finding after to numerous studies
As shown in figure 9, the toxicity of beryllium on the one hand can be reduced using beryllium alumin(i)um alloy, it on the other hand may be implemented almost and beryllium be to proton beam
Effect as the decaying of stream, wherein it is 55~85% that mass ratio, which is beryllium content, in the beryllium alumin(i)um alloy coating 3, aluminium content is
15~45%, thus in embodiment one to three in the inner wall of cylindrical slot by way of plating so that on inner wall
Painting is covered with beryllium alumin(i)um alloy coating, and according to the cross section of different cylindrical slots, thus to the thickness of beryllium alumin(i)um alloy coating
Carry out adaptability design.
For the collimating effect of energy slit, most crucial requirement is exactly in the alap situation of energy attenuation
Under, the effect of the longer collimation of distance also can be better, and it is a large amount of for the high-precision energy slit of the utility model passing through, such as
Shown in Figure 10, when passing through the proton beam of 70-230MeV respectively, energy attenuation is smaller in the 1-20cm Shi Douhui dough softening, but works as
Energy attenuation will increase obviously after reaching 24cm, therefore for the high-precision energy slit of the utility model, using 22-
The length of 24cm can improve collimating effect to greatest extent.
Furthermore for embodiment one to three, as shown in Fig. 3,5 and 7, the cylindrical slot 2 includes inlet slot 5
With exit slit 6, the edge of the inlet slot 5 is arc angling, and the radian of the arc angling is 170-160 degree, described
The edge of exit slit 6 is right angle, and above-mentioned design can not only improve the proton that proton beam enters cylindrical slot as far as possible
Number, at the same can guarantee can be not at exit slit proton beam cross section variation.
It is enlightenment, through the above description, relevant staff with the above-mentioned desirable embodiment according to utility model
Various changes and amendments can be carried out in the range of without departing from this item utility model technical idea completely, this item is practical
Novel technical scope is not limited to the contents of the specification, it is necessary to determine that its is technical according to scope of the claims
Range.
Claims (10)
1. a kind of high-precision energy slit for Proton therapy system, it is characterised in that: described narrow including slit ontology (1)
The shape for stitching ontology (1) is cuboid, and the length L of the slit ontology (1) is 20-24cm, and the slit ontology (1) is by density
For 2g/cm3To 3g/cm3Graphite material be made, the slit ontology (1) be equipped with cylindrical slot (2) it is several, the cylinder
In the same plane, the spacing of adjacent column shape slit (2) is 0.5cm to 1cm, the cylinder to the center line of shape slit (2)
The pore diameter range of slit (2) is 2mm to 10mm, is coated with beryllium alumin(i)um alloy coating (3) in each cylindrical slot (2), described
The thickness of beryllium alumin(i)um alloy coating (3) is no more than 0.1mm.
2. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: the slit
The two side walls S of ontology (1) is equipped with aluminized coating (4), and the thickness of the aluminized coating (4) is not less than 1cm.
3. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: the cylinder
The quantity of shape slit (2) is five, from bottom to top respectively cylindrical slot one (21), cylindrical slot two (22), cylindrical
The aperture of slit three (23), cylindrical slot four (24) and cylindrical slot five (25), the cylindrical slot one (21) is
The thickness of 2mm, the beryllium alumin(i)um alloy coating (3) of cylindrical slot one (21) inner wall are no more than 0.01mm, and the cylinder is narrow
The aperture for stitching two (22) is 3mm, and the thickness of the beryllium alumin(i)um alloy coating (3) of cylindrical slot two (22) inner wall is no more than
0.01mm, the aperture of the cylindrical slot three (23) are 5mm, the beryllium alumin(i)um alloy coating of cylindrical slot three (23) inner wall
(3) thickness is no more than 0.03mm, and the aperture of the cylindrical slot four (24) is 7.5mm, the cylindrical slot four (24)
The thickness of the beryllium alumin(i)um alloy coating (3) of inner wall is no more than 0.05mm, and the aperture of the cylindrical slot five (25) is 10mm, described
The thickness of the beryllium alumin(i)um alloy coating (3) of cylindrical slot five (25) inner wall is no more than 0.1mm.
4. the high-precision energy slit according to claim 3 for Proton therapy system, it is characterised in that: the cylinder
Between the spacing and cylindrical slot two (22) and cylindrical slot three (23) of shape slit one (21) and cylindrical slot two (22)
Away from identical and be 1cm, the spacing and cylindrical slot four of the cylindrical slot three (23) and cylindrical slot four (24)
(24) identical as the spacing of cylindrical slot five (25) and be 0.5cm.
5. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: the cylinder
The quantity of shape slit (2) is seven, from bottom to top respectively cylindrical slot one (21), cylindrical slot two (22), cylindrical
Slit three (23), cylindrical slot four (24), cylindrical slot five (25), cylindrical slot six (26) and cylindrical slot seven
(27), the aperture of the cylindrical slot one (21) is 1.2mm, the beryllium alumin(i)um alloy coating of cylindrical slot one (21) inner wall
Thickness be no more than 0.01mm, the aperture of the cylindrical slot two (22) is 2.2mm, cylindrical slot two (22) inner wall
The thickness of beryllium alumin(i)um alloy coating be no more than 0.03mm, the aperture of the cylindrical slot three (23) is 3.5mm, the cylinder
The thickness of the beryllium alumin(i)um alloy coating of slit three (23) inner wall is no more than 0.05mm, and the aperture of the cylindrical slot four (24) is
The thickness of 5mm, the beryllium alumin(i)um alloy coating of cylindrical slot four (24) inner wall are no more than 0.1mm, the cylindrical slot five
(25) aperture is 4mm, and the thickness of the beryllium alumin(i)um alloy coating of cylindrical slot five (25) inner wall is no more than 0.05mm, described
The aperture of cylindrical slot six (26) is 2mm, and the thickness of the beryllium alumin(i)um alloy coating of cylindrical slot six (26) inner wall does not surpass
0.03mm is crossed, the aperture of the cylindrical slot seven (27) is 1mm, and the beryllium alumin(i)um alloy of cylindrical slot seven (27) inner wall applies
The thickness of layer is no more than 0.01mm.
6. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: the cylinder
Between the spacing of shape slit one (21) and cylindrical slot two (22), cylindrical slot two (22) and cylindrical slot three (23)
Spacing and cylindrical slot six (26) and cylindrical slot seven away from, cylindrical slot five (25) and cylindrical slot six (26)
(27) spacing is all the same and is 1cm, the spacing and cylindrical slot of cylindrical slot three (23) and cylindrical slot four (24)
Four (24) are identical as the spacing of cylindrical slot five (25) and are 0.5cm.
7. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: further include water
Cold structure (7), the magnetism servo-electric motor water-cooling (7) are embedded on the another two side wall S` of slit ontology (1).
8. the high-precision energy slit according to claim 7 for Proton therapy system, it is characterised in that: the water cooling
Mechanism (7) is ceramic coil pipe.
9. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: the cylinder
Shape slit (2) includes inlet slot (5) and exit slit (6), and the edge of the inlet slot (5) is arc angling, the arc
The radian of shape chamfering is 170-160 degree, and the edge of the exit slit (6) is right angle.
10. the high-precision energy slit according to claim 1 for Proton therapy system, it is characterised in that: the beryllium
It is 55~85% that mass ratio, which is beryllium content, in aluminium alloy covered (3), and aluminium content is 15~45%.
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