CN204288824U - The radiation proof material of plumbous technology is kept off for radiation therapy - Google Patents
The radiation proof material of plumbous technology is kept off for radiation therapy Download PDFInfo
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- CN204288824U CN204288824U CN201420263668.0U CN201420263668U CN204288824U CN 204288824 U CN204288824 U CN 204288824U CN 201420263668 U CN201420263668 U CN 201420263668U CN 204288824 U CN204288824 U CN 204288824U
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Abstract
The utility model discloses and a kind ofly can be used for the radiation proof material that radiation therapy keeps off plumbous technology, described radiation proof material comprises at least one deck and is formed by stacking by macromolecule matrix and the mixing composite layer of inorganic powder and at least one coating, at least one wire sheathing; The thickness of described radiation proof material is 0.5-3.0cm.Radiation proof material described in the utility model can be used for the shielding in the place having radioactive source, as the block in electric wire radiation therapy, or for radiotherapy, manufacture protective clothing, also can be used in factory, shielding field, laboratory.The not leaded and cadmium of material described in the utility model and toughness better, be easy to shape; effectively can reduce bremsstrahlung; strengthen the precision for the treatment of and the protection of normal tissue; can also reduce in the process Zhang Zaocheng environmental pollution manufactured and use and the injury that can reduce processing staff's health, be a kind of shielding material of novel environment friendly.
Description
Technical field
The utility model relates to a kind of radiation proof material, particularly relates to a kind ofly to can be used for the radiation proof material that radiation therapy keeps off plumbous technology.
Background technology
Keeping off plumbous technology is a technology being applied in evaporation of electron treatment.When accelerator high energy electron beam treatment, generally can according to the needs of the treatments such as the shape of diseased region or protection vitals, in regular launched field, additional lead forms Irregular field.The fundamental purpose of block is that regular launched field is become Irregular field, to make launched field shape consistent with the projection of target region shape, or in order to protect a certain vital tissue or organ in launched field.
In radiation therapy in the past, block material is made up of pure lead.Due to the fusing point of lead higher (fusing point is 327 DEG C), cause adopting pure lead more difficult as the making of block material, general only as the use of launched field standard block, not easily each patient is made to the lead of given shape.In order to solve the above problems, clinical radiation therapy uses block material to be generally add the lower lead-containing alloy of other metal fusing point both at home and abroad now, i.e. low-melting point lead (low melting-point alloy lead, LML).
The constituent of conventional low-melting point lead is bismuth 50%, plumbous 26.7%, and cadmium 10.0%, tin 13.3%.The method for making of low-melting point lead is first molten Pb, tin, after add bismuth, cadmium, after fusing the lead alloy of low melting point.Existing low-melting point lead can effectively overcome the high shortcoming of plumbous fusing point, can than being easier to irregular " calimator " that realize applicable individual patients.
But in the making and use procedure of reality, there is very large defect in low-melting point lead.First, the heavy metals such as the lead contained in low-melting alloy and cadmium, can discharge toxic gas unavoidably, not only to environment, also can damage the healthy of staff in making and use procedure.Secondly, lead is a kind of heavy metal material of high atomic number, the interception of high atomic number material to electronics is stronger, stronger bremsstrahlung can be produced (wherein when the material effects of electronics and high atomic number, charged particle is directly proportional to the energy of the bremsstrahlung coefficient of material to the quadratic sum incoming charged particles of the atom coefficient of material), X ray due to bremsstrahlung generation can cause the change of depth dose on launched field central shaft, and the X ray produced by bremsstrahlung does not take in treatment planning systems, therefore, the X ray produced by bremsstrahlung can have an impact to treatment, even the normal tissue of patient is damaged.
In China, the radiotherapy center of major part hospital all uses low-melting point lead to make block, although medical personnel can cause great harm to environment and operating personnel to use low-melting point lead, also not yet find a kind of better alternative block material at present, also have no the report of correlative study.In the last few years, although some countries such as the U.S. and Japan have started relevant experimental study to find the plumbous equivalent material of new gear, yet the pollution problem of the sigmatron light beam that bremsstrahlung produces had not been proposed to the method solved.
Utility model content
The utility model is intended to, for the pollution problem reducing the sigmatron light beam that bremsstrahlung produces, provide a kind of alternative traditional gear lead material, can be widely used in the radiocurable radiation proof material of high energy e+e-collisions.
Of the present utility modelly provide a kind of radiation proof material keeping off plumbous technology for radiation therapy, it comprises: at least one floor height molecular matrix/inorganic powder composite layer is with at least one deck coating, at least one deck wire sheathing are formed by stacking successively; Wherein, described macromolecule matrix/inorganic powder composite layer is by macromolecule matrix and inorganic powder is mixing forms.
Wherein, the thickness of described radiation proof material is 0.5-3.0cm.
In the utility model one comparatively preferred embodiment, the thickness of described composite layer is preferably 0.1-0.5cm, the thickness of described composite layer can more preferably 0.2-0.4cm, and be more preferably 0.25-0.35cm, described composite layer comprises macromolecule matrix and inorganic powder.
In the utility model one comparatively preferred embodiment, the thickness of described radiation proof material can more preferably 0.6-2.7cm.
In the utility model one comparatively preferred embodiment, described radiation proof material preferably comprises the described composite layer of 2-6 layer, is more preferably and comprises composite layer described in layer 2-4, most preferably is and comprises 3 layers of described composite layer.
In the utility model one comparatively preferred embodiment, described coating is preferably one deck, and the thickness of described coating is preferably 0.05-0.2cm.Described coating material can be selected from one or more in chromium nitride, titanium nitride, titanium carbonitride, TiAlN and tungsten carbide etc.; Described coating has good tack, oxidative resistance and corrosion resistance; Described coating also can select different colors according to actual needs.
In the utility model one comparatively preferred embodiment; described wire sheathing is preferably one deck; described wire sheathing is that braiding wiry forms; can be used for protecting radiation proof material coating and the toughness strengthening described radiation proof material, make described radiation proof material can be easy to sizing and use.
Preferably, one or more preferably in copper, zinc, aluminium, almag, stainless steel etc. of the material of described wire sheathing.Preferably, the thickness of described wire sheathing is preferably 0.01-0.08cm.
In radiation proof material described in the utility model, described macromolecule matrix can be preferably thermoplastic elastomer (T PE/TPR), phenylethylene (SBS can be selected from, SIS, SEBS, SEPS), olefines (TP0, TP V), diene class (TPB, TPI), polyvinyl chloride-base (TPVC, TCPE), ammonia ester class (TPU), ester class (TPEE), amide-type (TPAE), Organic fluoride class (TPF), silicone based, one or more in vinyl or other ionomer etc., can more preferably polystyrene, polyamide, polyester, the potpourri of one or more in polyolefin.
In the utility model one comparatively preferred embodiment, the particle diameter of described inorganic powder is preferably less than 75 μm;
Wherein, described inorganic powder is preferably metal or metallic compound, specifically can be preferably the potpourri of one or more in the inorganic powders such as iridium, tungsten, iron, stainless steel, zinc, copper, brass, tin, titanium, tungsten oxide, iron oxide, zinc paste, antimony oxide, ferrite, barium sulphate, the potpourri of one or more more preferably in iridium, tungsten, iron, stainless steel, zinc, copper, brass, tin, titanium, tungsten oxide, iron oxide, zinc paste, antimony oxide, ferrite, barium sulphate;
Preferably, described inorganic powder most preferably is tungsten powder, and the purity of described tungsten powder is preferably 99.9%.
In the utility model one comparatively preferred embodiment, with the general assembly (TW) of described composite layer for benchmark, the content of described inorganic powder in described composite layer is preferably 70-98wt%, and content is more preferably 75-90wt%, is further preferably 78-85wt%.
In the utility model one comparatively preferred embodiment, described coating to be located at described in composite layer described in one and one between wire sheathing.
The application additionally providing a kind of radiation proof material of the present utility model, described radiation proof material can be used for the shielding in the place having radioactive source, as as the block in electric wire radiation therapy, or for radiotherapy, manufacture protective clothing, also can be used in factory, shielding field, laboratory.
The electric wire of radiation proof material described in the utility model to energy 6-20MeV has shielding action.Preferably, the content of inorganic powder contained by composite layer described in the radiation proof material described in adjustment and/or thickness, can realize the shielding to different-energy electric wire.
Radiation proof material described in the utility model adopts thermoplastic elastomer and non-lead, the high desnity metal powder of cadmium is material, prepare a kind of bremsstrahlung, pollution-free and by the novel gear lead material that the modes such as cutting are easily shaped, there is beneficial effect as follows of can effectively reducing:
1) material described in the utility model adopts the mixing method of metal or inorganic powder and thermoplastic elastomer to replace Metal Melting, good toughness, direct pocket knife or scissors this material can be cut into required shape, be easy to shape.
2) not leaded, cadmium in material described in the utility model, thus can reduce manufacture and use process in damage to environment or to the health of operating personnel.
3) radiation proof material described in the utility model; be by the powder of inorganic metal and compound thereof and the macromolecular material containing a large amount of C, H element with the use of; not only there is good anti-radiation effect; effectively can also reduce the pollution of the sigmatron light beam that bremsstrahlung produces, strengthen the precision for the treatment of and the protection of normal tissue.
4) material described in the utility model is the shielding material of a novel environment friendly, and described materials'use is in extensive range, the protective clothing that the field such as factory, laboratory that such as also can be used for being manufactured on radioactive source uses.
Accompanying drawing explanation
Fig. 1 is the structural representation of radiation proof material described in the utility model embodiment.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further, but not as restriction of the present utility model.
In the utility model, described radiation proof material by least one deck by macromolecule matrix and the mixing composite layer of inorganic powder with at least one deck coating, at least one deck wire sheathing are formed by stacking successively;
Wherein, the thickness of described radiation proof material is 0.5-3.0cm.
Fig. 1 is the structural representation of radiation proof material described in the utility model embodiment, as shown in fig. 1, radiation proof material described in the present embodiment comprises the three stacked composite layer added and the coatings being positioned at described composite layer, is specially the first composite layer 101, second composite layer 102, the 3rd composite layer 103, coating 104, wire sheathing 105; The thickness of described first composite layer 101 is 0.5cm, the thickness of the thickness 0.3cm of the second composite layer 102, the 3rd composite layer 103 is also 0.3cm, and the thickness of coating 104 is 0.1cm, and the thickness of wire sheathing 105 is 0.05cm; Then by 3-layer composite material layer, one deck coating and layer of metal braid superpose the described radiation proof material obtained thickness be 1.25cm.
Namely described coating 104 to be located at described in one described in composite layer 103 and one between wire sheathing 105.
According to the radiation proof material shown in Fig. 1, wherein, the compound substance Rotating fields comprised can also be superposed by one deck, two-layer, the described composite layer such as four layers, five layers, six layers, seven layers, eight layers, nine layers, ten layers and be formed, and the energy of the electric wire that the number of plies of concrete composite layer shields according to the actual needs determines.
Radiation proof material as shown in Figure 1, according to the energy size of the electric wire of required shielding, the thickness of described composite layer can also be 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.35cm, 0.28cm etc.
The thickness of described radiation proof material can be 0.6cm, 0.7cm, 0.9cm, 1.1cm, 1.2cm, 1.5cm, 2.1cm, 2.3cm, 2.7cm, 2.9cm, 3.0cm etc.
According to the thickness of above-mentioned composite layer, the thickness of described radiation proof material can also be determined by the number of plies of contained composite layer: as the energy according to electric wire, and the number of plies contained by described radiation proof material is preferably three layers, four layers, five layers etc.
Below in conjunction with in the radiation proof material described in the present embodiment containing the composite layer of different content inorganic powder, and superposing by the composite layer of gained the radiation proof material that the different number of plies obtains, the electric wire for different-energy carries out the embodiment of screening ability test.
embodiment 1
Preparation is containing the composite-material laminates of the tungsten powder of 75% weight ratio:
The tungsten powder and the polystyrene that take 75% weight ratio carry out mixing, until evenly agglomerating, have stickiness, gloss and uniform color.Put into by the material mixed in sheeter and carry out compressing tablet (sheeter temperature is more lower slightly than mixing roll temperature), making thickness is 0.3cm composite-material laminates.
Wherein, described tungsten powder and polystyrene are nonpollution material, and purity reaches 99.9%, and tungsten powder can pollution-freely reclaim, and only produce carbon dioxide and water during recovery.
Content measurement: composite layer is to the screening ability of different-energy electric wire;
Testing tool: Varian accelerator (model is Varian 2100C/D), IBA ionization chamber, Fammer dosemeter, size are the water tank of 30cm*30cm.
Method of testing:
Step 1, by electric wire energy adjustment to E=9MeV, E=12MeV, E=20MeV; Calimator is 15*15cm
2, ource-skin Distance SSD is 100cm, and launched field is 10*10cm
2;
Step 2, is placed in underwater 2.5cm depth by ionization chamber, make electric wire energy the strongest;
Step 3, loads calimator by the radiation proof material of the composite-material laminates containing 0,1,2,4,6 layer respectively, tests.
Test result: as shown in table 1, table 2.
Table 1, in the present embodiment different-energy electric wire under through the calimator measured value table of comparisons of radiation proof material
Table 2, in the present embodiment, the radiation proof material of the different number of plies is to the attenuation rate table of comparisons of different-energy electric wire
Test result analysis: from table 1, table 2, the present embodiment is that the screening ability of the electric wire of 9MeV is better to energy, wherein three layers of radiation proof material containing the composite layer described in the present embodiment of 75% tungsten powder, radiation proof material is that the attenuation rate of the electric wire of 9MeV just can reach 97.8% to energy, meets the requirement that the attenuation rate of radiation proof material to electron beam is greater than 95%; And be the electric wire of 12MeV for energy, then need five layers, the radiation proof material of the composite layer described in the present embodiment can be made to be that the attenuation rate of the electric wire of 12MeV just can reach more than 95% to energy; The radiation proof material of the composite layer described in the present embodiment of 75% tungsten powder is that the screening ability of the electric wire of 20MeV is not good for energy.
embodiment 2
Preparation is containing the composite-material laminates of the tungsten powder of 80% weight ratio:
The tungsten powder and the polystyrene that take 80% weight ratio carry out mixing, until evenly agglomerating, have stickiness, gloss and uniform color.Put into by the material mixed in sheeter and carry out compressing tablet (sheeter temperature is more lower slightly than mixing roll temperature), making thickness is 3mm composite-material laminates.
Content measurement, testing tool and method of testing are in the same manner as in Example 1, respectively the radiation proof material of the composite-material laminates containing 0,1,2,3,5 layer are loaded calimator, test.
Test result: as shown in table 3, table 4.
Table 3, in the present embodiment different-energy electric wire under through the table of comparisons of the calimator measured value of radiation proof material
Table 4, in the present embodiment, the radiation proof material of the different number of plies is to the attenuation rate table of comparisons of different-energy electric wire
Test result analysis: from table 3, table 4, the present embodiment is that the screening ability of the electric wire of 9MeV is better to energy, wherein only need three layers containing the radiation proof material of the composite layer described in the present embodiment of 80% tungsten powder, radiation proof material is that the attenuation rate of the electric wire of 9MeV just can reach 100% to energy, meets the requirement that the attenuation rate of radiation proof material to electron beam is greater than 95%; And be the electric wire of 12MeV for energy, then need five layers, the radiation proof material of the composite layer described in the present embodiment can be made to be that the attenuation rate of the electric wire of 12MeV just can reach 100% to energy; The radiation proof material of the composite layer described in the present embodiment of 80% tungsten powder is that the screening ability of the electric wire of 20MeV is not good for energy.
embodiment 3
Preparation is containing the composite-material laminates of 85% weight ratio tungsten powder:
The tungsten powder and the polystyrene that take 85% weight ratio carry out mixing, until evenly agglomerating, have stickiness, gloss and uniform color.Put into by the material mixed in sheeter and carry out compressing tablet (sheeter temperature is more lower slightly than mixing roll temperature), making thickness is 3mm composite-material laminates, and wherein the particle diameter of tungsten powder is 74 μm.
Content measurement and the content measurement described in testing tool and embodiment 1, testing tool are identical.
Method of testing:
Step 1, by electric wire energy adjustment to E=6MeV, E=9MeV, E=12MeV, E=20MeV; Calimator is 15*15cm
2, ource-skin Distance SSD is 100cm, and launched field is 10*10cm
2;
Step 2, when electric wire energy is 6MeV and 9MeV, is placed in underwater 1.5cm depth by ionization chamber; When electric wire energy is 12MeV and 20MeV, ionization chamber is placed in underwater 2.5cm depth;
Step 3, loads calimator by the radiation proof material of the composite-material laminates containing 0-9 layer respectively, tests.Wherein when electric wire energy is 12MeV and 20MeV, do not comprise and the radiation proof material loading calimator of the composite-material laminates containing 1 layer is tested.
Test result: as shown in table 5, table 6.
Table 5, in the present embodiment different-energy electric wire under through the table of comparisons of the calimator measured value of radiation proof material
Table 6, in the present embodiment, the radiation proof material of the different number of plies is to the table of comparisons of the attenuation rate of different-energy electric wire
Test result analysis: from table 5, table 6, the screening ability of the present embodiment to the electric wire of energy between 6-12MeV is better, wherein only need three layers of radiation proof material containing the composite layer described in the present embodiment of 85% tungsten powder just can meet clinical demand, the requirement that the attenuation rate of radiation proof material to electron beam is greater than 95%.
Test result in conjunction with the embodiments in 3, known:
When the energy of electric wire is 6MeV, need the radiation proof material 0.6cm containing tungsten powder containing 85%;
When the energy of electric wire is 9-12MeV, need the radiation proof material 0.9cm containing tungsten powder containing 85%;
When the energy of electric wire is 20MeV, need the radiation proof material 2.7cm containing tungsten powder containing 85%;
Test result in integrated embodiment 1-3 is known, and in radiation proof material described in the utility model, the content of tungsten is higher, then stronger to the screening ability of the higher electric wire of energy, and the thickness of radiation proof material is higher, higher to the attenuation rate of electric wire.
In embodiment of the present utility model, the superposition of the composite layer of different-thickness can also be obtained the different radiation proof material of number of plies difference, thickness.
Be described in detail specific embodiment of the utility model above, but it is as example, the utility model is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that this practicality is carried out and substituting also all among category of the present utility model.Therefore, not departing from the equalization conversion and amendment done under spirit and scope of the present utility model, all should be encompassed in scope of the present utility model.
Claims (9)
1. keep off a radiation proof material for plumbous technology for radiation therapy, it is characterized in that, comprise at least one floor height molecular matrix/inorganic powder composite layer with at least one deck coating, at least one deck wire sheathing are formed by stacking successively;
Wherein, the thickness of described radiation proof material is 0.5-3.0cm.
2. radiation proof material according to claim 1, is characterized in that, the thickness of described composite layer is 0.1-0.5cm.
3. radiation proof material according to claim 1, is characterized in that, described macromolecule matrix is the one in polystyrene, polyamide, polyester, polyolefin.
4. radiation proof material according to claim 1, is characterized in that, the particle diameter of described inorganic powder is for being less than 75 μm.
5. radiation proof material according to claim 4, is characterized in that, described inorganic powder is the one in iridium, tungsten, iron, stainless steel, zinc, copper, brass, tin, titanium, tungsten oxide, iron oxide, zinc paste, antimony oxide, ferrite, barium sulphate.
6. the radiation proof material according to any one of claim 1-5, is characterized in that, described radiation proof material comprises the described composite layer of 2-6 layer.
7. radiation proof material according to claim 1, is characterized in that, the thickness of described coating is 0.05-0.2cm.
8. radiation proof material according to claim 1, is characterized in that, the thickness of described wire sheathing is 0.01-0.08cm.
9. radiation proof material according to claim 1, is characterized in that, described coating to be located at described in composite layer described in one and one between wire sheathing.
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| CN201420263668.0U CN204288824U (en) | 2014-05-20 | 2014-05-20 | The radiation proof material of plumbous technology is kept off for radiation therapy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109069244A (en) * | 2016-03-30 | 2018-12-21 | 罗伯特.T.伯克咨询有限责任公司 | The improved spreading range ultrasonic toothbrush in space |
| CN112846495A (en) * | 2019-11-27 | 2021-05-28 | 山东大学齐鲁医院 | High-precision electron beam radiation field stop block |
-
2014
- 2014-05-20 CN CN201420263668.0U patent/CN204288824U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109069244A (en) * | 2016-03-30 | 2018-12-21 | 罗伯特.T.伯克咨询有限责任公司 | The improved spreading range ultrasonic toothbrush in space |
| CN112846495A (en) * | 2019-11-27 | 2021-05-28 | 山东大学齐鲁医院 | High-precision electron beam radiation field stop block |
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