EP1435100B1 - Blei-ersatzmaterial für strahlenschutzzwecke - Google Patents

Blei-ersatzmaterial für strahlenschutzzwecke Download PDF

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Publication number
EP1435100B1
EP1435100B1 EP03787618A EP03787618A EP1435100B1 EP 1435100 B1 EP1435100 B1 EP 1435100B1 EP 03787618 A EP03787618 A EP 03787618A EP 03787618 A EP03787618 A EP 03787618A EP 1435100 B1 EP1435100 B1 EP 1435100B1
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EP
European Patent Office
Prior art keywords
lead
weight
compounds
substitute material
radiation protection
Prior art date
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Expired - Lifetime
Application number
EP03787618A
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German (de)
English (en)
French (fr)
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EP1435100A1 (de
Inventor
Heinrich Eder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mavig GmbH
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Mavig GmbH
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Publication date
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Application filed by Mavig GmbH filed Critical Mavig GmbH
Publication of EP1435100A1 publication Critical patent/EP1435100A1/de
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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals

Definitions

  • the invention relates to a lead replacement material for radiation protection purposes in the energy range of an X-ray tube with a voltage of 60-125 kV.
  • Conventional radiation protection clothing for use in X-ray diagnostics usually contains lead or lead oxide as protective material.
  • the DE 199 55 192 A1 describes a method for producing a radiation protection material from a polymer as matrix material and the powder of a metal of high atomic number.
  • the DE 201 00 267 U1 describes a highly elastic, lightweight, flexible, rubbery radiation protection material wherein additions of chemical elements and their oxides having an atomic number greater than or equal to 50 are added to a specific polymer.
  • the degree of attenuation or the lead equivalent (International Standard IEC 61331-1, Protective devices against diagnostic medical X-radiation) of the respective material shows a partially very pronounced dependence on the beam energy, which is a function of the voltage of the X-ray tube.
  • the known radiation protective clothing made of lead-free material therefore have a more or less strong decrease in absorption below 70 kV and over 110 kV compared to lead. That is, to achieve the same shielding effect as with leaded material, a higher basis weight of protective clothing is required for this range of x-ray voltage.
  • the object of the present invention is to replace lead as a radiation protection material in terms of its shielding properties over an energy range of an X-ray tube with a voltage of 60-125 kV, so over a larger energy range, and over a larger thickness range of nominal lead equivalents and at the same time the largest possible To achieve weight reduction. It should be used only to lead environmentally friendly materials.
  • the object of the invention is achieved by a lead replacement material for radiation protection purposes in the energy range of an X-ray tube with a voltage of 60-125 kV, which is characterized in that the lead substitute material Sn, Bi and optionally W or compounds of these metals and having this composition of Lead Substitute is a function of nominal lead equivalents.
  • Preferred compounds of Sn, Bi and W are their oxides.
  • a lead-free shielding material with the extended field of application can now be achieved by a combination of tin with bismuth and, if appropriate, tungsten, coordinated with the respective nominal lead equivalent.
  • the lead substitute material is characterized by having 10-20 wt% matrix material, 50-75 wt% Sn or Sn compounds, and 20-35 wt% Bi or Bi compounds for nominal lead equivalents up to 0.15 mm and 40-60 wt.% Sn or Sn compounds, 15-30 wt.% Bi or Bi compounds and 0-30 wt.% W or W compounds for nominal -Blei Eisenute of 0.15 to 0.60 mm.
  • the lead substitute material is characterized by having 52-70 wt.% Sn or Sn compounds and 21-32 wt.% Bi or Bi compounds for nominal lead equivalents to 0.15 mm and 42-57 wt.% Sn or Sn compounds, 15-30 wt.% Bi or Bi compounds and 5-27 wt.% W or W compounds for nominal lead equivalents of 0.15-0 , 60 mm.
  • the criterion for the substitution of lead is a 10% deviation of the lead equivalent from the nominal value, as specified in DIN 6813. Therefore, radiation protection clothing made from the replacement material of the invention can be worn without restrictions in all applications of X-ray diagnostics. This represents a significant advantage over all known lead substitutes.
  • the lead substitute material is characterized in that it has a structure of layers of different composition.
  • the lead substitute material may comprise a construction of at least two separate or interconnected layers of different composition, wherein the body-removed layer comprises predominantly Sn and the proximal layer (s) predominantly Bi and optionally W.
  • Table 1 Weight per unit area (kg / m ⁇ sup> 2 ⁇ / sup>) of various radiation protection materials based on the absorption of pure lead under measurement conditions according to IEC 61331-1 as a function of energy.
  • Table 1 shows that the lead substitute material according to the invention with the same protective effect in the range of 60-125 kV has the most advantageous basis weight of all lead-free materials.
  • the measurements carried out further show that the physical properties of the lead-substitute material are dependent both on the energy of the incident radiation and on the thickness of the layer, i. for each layer thickness, the composition of the lead substitute material must be changed to suit the absorption behavior of lead.
  • compositions for common lead equivalents are given with the corresponding measurements according to IEC 61331-1.
  • Nominal lead equivalent (mm) Composition M Matrix Material Basis weight (kg / m 2 ) 60 kV 80 kV 100 kV 125 kV Beam qualities according to IEC 61331-1 measured lead equivalent (mm) 0,025 67% by weight of Sn + 0.25 0.023 0,025 0,025 0.023 22% by weight Bi + 15% by weight of M 0.05 55% by weight of Sn + 0.51 0,045 0,050 0,050 0,045 30% by weight of Bi + 15% by weight of M 0,125 55% by weight of Sn + 1.25 0,120 0,125 0,125 0,120 30% by weight of Bi + 15% by weight of M 0.25 54% by weight of Sn + 2.8 0.24 0.25 0.25 0.23 12% by weight W + 19% by weight Bi + 15% by weight of M 0.35 48% by weight of Sn + 3.9 0.33 0.35 0.36 0.32 20% by weight
  • the equivalent of 0.25 mm lead replacement material consists of 15 wt .-% matrix material, 54 wt .-% Sn, 12 wt .-% W and 19 wt .-% Bi at a basis weight of a total of 2.8 kg / m 2 .
  • the matrix material is the carrier and may for example consist of rubber or latex. Greater deviations from the composition of the invention affect either the approved range of application and / or the weight negatively.
  • the embodiment of the subject matter of claim 5 of the invention can be used to further reduce the radiation exposure of the user.
  • the radiation exposure at 100 kV tube voltage by approx. 15% are reduced if the outer layer consists exclusively of tin and the inner layer of bismuth and optionally tungsten. Taking into account this relationship, the weight of the protective clothing can be further reduced in an advantageous manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP03787618A 2002-07-26 2003-07-01 Blei-ersatzmaterial für strahlenschutzzwecke Expired - Lifetime EP1435100B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10234159A DE10234159C1 (de) 2002-07-26 2002-07-26 Blei-Ersatzmaterial für Strahlenschutzzwecke
DE10234159 2002-07-26
PCT/DE2003/002178 WO2004017332A1 (de) 2002-07-26 2003-07-01 Blei-ersatzmaterial für strahlenschutzzwecke

Publications (2)

Publication Number Publication Date
EP1435100A1 EP1435100A1 (de) 2004-07-07
EP1435100B1 true EP1435100B1 (de) 2011-09-14

Family

ID=28799050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03787618A Expired - Lifetime EP1435100B1 (de) 2002-07-26 2003-07-01 Blei-ersatzmaterial für strahlenschutzzwecke

Country Status (8)

Country Link
US (1) US7041995B2 (enExample)
EP (1) EP1435100B1 (enExample)
JP (1) JP4944378B2 (enExample)
CN (1) CN1253898C (enExample)
AU (1) AU2003250768A1 (enExample)
DE (1) DE10234159C1 (enExample)
ES (1) ES2372933T3 (enExample)
WO (1) WO2004017332A1 (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20208918U1 (de) * 2002-06-08 2003-10-23 Paul Hartmann AG, 89522 Heidenheim Bleifreies Strahlenschutzmaterial
US8022116B2 (en) 2003-07-18 2011-09-20 Advanced Shielding Components, Llc Lightweight rigid structural compositions with integral radiation shielding including lead-free structural compositions
WO2005024846A1 (de) * 2003-09-03 2005-03-17 Mavig Gmbh Bleifreies strahlenschutzmaterial mit zumindest zwei schichten unterschiedlicher abschirmeigenschaft
WO2005023115A1 (de) * 2003-09-03 2005-03-17 Mavig Gmbh Strahlenschutzmaterial auf silikonbasis
EP1691761B1 (en) * 2003-12-05 2011-07-27 Bar-Ray Products, Inc. A low-weight ultra-thin flexible radiation attenuation composition
DE102004002501A1 (de) * 2004-01-17 2005-08-11 Arntz Beteiligungs Gmbh & Co. Kg Strahlenschutzmaske
US20140145097A1 (en) * 2004-04-14 2014-05-29 Steven G. Caldwell Radiation shields and methods of making the same
DE102006028958B4 (de) 2006-06-23 2008-12-04 Mavig Gmbh Geschichtetes Bleifrei-Röntgenschutzmaterial
US20080276948A1 (en) * 2007-05-09 2008-11-13 Philip Morris Usa Inc. Chewing article for oral tobacco delivery
CN101137285B (zh) * 2007-10-12 2010-08-25 魏宗源 用于医用x射线防护的复合屏蔽材料
DE102009037565A1 (de) 2009-08-14 2011-02-24 Mavig Gmbh Beschichtete Mikrofaserbahn und Verfahren zur Herstellung derselben
US9754690B2 (en) 2012-10-31 2017-09-05 Lite-Tech, Inc. Flexible highly filled composition, resulting protective garment, and methods of making the same
CN105125236A (zh) * 2015-06-30 2015-12-09 夏文骞 Ct防护服
WO2021053367A1 (en) * 2019-09-16 2021-03-25 Saba Valiallah High-pass radiation shield and method of radiation protection
CN113025088A (zh) * 2021-03-09 2021-06-25 昆明理工大学 一种液态金属屏蔽辐射涂层材料及其制备方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54151797A (en) * 1978-05-19 1979-11-29 Mitsubishi Heavy Ind Ltd Protective clothes for handling radioactive substance
HU195335B (en) * 1984-11-05 1988-04-28 Peter Teleki Method and modifying body for influencing effect on a target sensitive to radiation exerted by x-ray or gamma radiation
GB8827529D0 (en) * 1988-11-25 1988-12-29 Du Pont Canada Radiation protection material
GB8827531D0 (en) * 1988-11-25 1988-12-29 Du Pont Canada Highly filled compositions
US5245195A (en) * 1991-12-05 1993-09-14 Polygenex International, Inc. Radiation resistant film
BR9710080A (pt) * 1996-06-28 2000-01-11 Texas Research Inst Austin Composição de matéria de alta densidade.
US6153666A (en) * 1998-07-16 2000-11-28 Bar-Ray Products, Inc. Radiation-attenuating sheet material
JP2001083288A (ja) * 1999-09-14 2001-03-30 Hanshin Gijutsu Kenkyusho:Kk 医療用ｘ線遮蔽材料
DE19955192C2 (de) * 1999-11-16 2003-04-17 Arntz Beteiligungs Gmbh & Co Verfahren zur Herstellung eines Strahlenschutzmaterials

Also Published As

Publication number Publication date
EP1435100A1 (de) 2004-07-07
AU2003250768A1 (en) 2004-03-03
DE10234159C1 (de) 2003-11-06
WO2004017332A1 (de) 2004-02-26
CN1253898C (zh) 2006-04-26
CN1613122A (zh) 2005-05-04
JP2005534037A (ja) 2005-11-10
ES2372933T3 (es) 2012-01-27
US7041995B2 (en) 2006-05-09
JP4944378B2 (ja) 2012-05-30
US20050178986A1 (en) 2005-08-18

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