FR2498922A1 - Foam cored laminates for radiology applications - to minimise X=ray absorption losses and thus power and dose levels - Google Patents

Foam cored laminates for radiology applications - to minimise X=ray absorption losses and thus power and dose levels Download PDF

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Publication number
FR2498922A1
FR2498922A1 FR8102001A FR8102001A FR2498922A1 FR 2498922 A1 FR2498922 A1 FR 2498922A1 FR 8102001 A FR8102001 A FR 8102001A FR 8102001 A FR8102001 A FR 8102001A FR 2498922 A1 FR2498922 A1 FR 2498922A1
Authority
FR
France
Prior art keywords
ray absorption
minimise
resin
power
foam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8102001A
Other languages
French (fr)
Other versions
FR2498922B3 (en
Inventor
Marcel Le Sonn
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.)
Thales SA
Original Assignee
Thomson CSF SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR8102001A priority Critical patent/FR2498922A1/en
Publication of FR2498922A1 publication Critical patent/FR2498922A1/en
Application granted granted Critical
Publication of FR2498922B3 publication Critical patent/FR2498922B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
    • A61B6/0442—Supports, e.g. tables or beds, for the body or parts of the body made of non-metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/007—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a foam layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0271—Epoxy resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0285—Condensation resins of aldehydes, e.g. with phenols, ureas, melamines

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Laminated Bodies (AREA)

Abstract

Composite board with low X-ray absorption characteristics has a core of foamed organic resin covered on each face with laminated sheet. For use in radiological equipment, esp. where use of carbon fibres or carbon-filled materials are not suitable. Pref. the core is of expanded polyurethane resin, typically about 20 mm thick and 60-80 kg/m3 apparent density. Pref. the covers are of layers of paper impregnated with phenolic, epoxy or polyester resin and typically about 1.4 mm thick. Esp. suitable for supporting patients for X-ray scanning, to minimise the necessary dose level.

Description

MATéRIAU COMPOSITE PRESENTANT UN FAIBLE COEFFICIENT
D'ABSORPTION AUX RAYONS X ET SON APPLICATION
A TOUT ACCESSOIRE POUR APPAREIL DE RADIOLOGIE
La présente invention concerne un matériau composite présentant un faible coefficient d'absorption aux rayons X et son application à tout accessoire pour appareil de radiologie. COMPOSITE MATERIAL WITH LOW COEFFICIENT
OF X-RAY ABSORPTION AND ITS APPLICATION
ANY ACCESSORY FOR RADIOLOGY DEVICE
The present invention relates to a composite material having a low X-ray absorption coefficient and its application to any accessory for radiology apparatus.

Plusieurs types de matériaux sont actuellement utilisés dans les appareils médicaux. Il s'agit par exemple de matériaux composites formés d'un substrat en contreplaqué assurant la rigidité de l'ensemble, recouvert sur chacune de ses faces d'une couche d'un produit (du type commercialisé sous les marques Formica, Polyrey,
Celamine etc ...) qui assure une bonne présentation.Malheureusement le coefficient d'absorption aux rayons X est important ce qui conduit à une augmentation préjudiciable des doses de rayons X nécessaires,
Sur certains matériels destinés particulièrement aux examens vasculaires, on tend à utiliser un matériau composite comprenant également un substrat, sur lequel, de part et d'autre est collée une couche de fibre de carbone réputée à la fois pour ses bonnes caractéristiques mécaniques et son faible coefficient d'absorption aux rayons X, malheureusement la teinte noire du carbone ne répond pas toujours aux exigences de l'esthétique et surtout le prix de revient des produits dans lequel entre le carbone sous quelque forme que se soit (microsphère, fibre ...) est très élevé et même prohibitif pour un certain nombre d'équipements.Several types of materials are currently used in medical devices. These are, for example, composite materials formed from a plywood substrate ensuring the rigidity of the assembly, covered on each of its faces with a layer of a product (of the type sold under the brands Formica, Polyrey,
Celamine etc ...) which ensures a good presentation Unfortunately the X-ray absorption coefficient is important which leads to a detrimental increase in the doses of X-rays necessary,
On certain materials intended particularly for vascular examinations, there is a tendency to use a composite material also comprising a substrate, on which, on both sides, is bonded a layer of carbon fiber known both for its good mechanical properties and its low X-ray absorption coefficient, unfortunately the black color of the carbon does not always meet the requirements of the aesthetics and especially the cost price of the products in which the carbon enters in any form whatsoever (microsphere, fiber ... ) is very high and even prohibitive for a certain number of equipment.

La présente invention a pour but de pallier ces inconvénients. The present invention aims to overcome these drawbacks.

Elle concerne un nouveau matériau composite dans lequel l'utilisation de fibre de carbone est exclue. il présente un coefficient d'absorption aux rayons X meilleur que celui des matériaux décrits ci-dessus tout en coflservanr des caracteristiques mécaniq ies com- patibles avec les applications qui en sont laites. tin tel matériau, a de plus, l'avantage d'être relativement bon marché notamment si on le compare à ceux qui mettent en oeuvre les fibres de carbone.It relates to a new composite material in which the use of carbon fiber is excluded. it has a better X-ray absorption coefficient than that of the materials described above, while at the same time providing mechanical characteristics compatible with the applications which are inherent therefrom. Such a material, moreover, has the advantage of being relatively inexpensive, especially if it is compared with those which use carbon fibers.

Enfin, il permet un choix de couleurs variées donc une présentation satisfaisante du produit fini.Finally, it allows a choice of varied colors therefore a satisfactory presentation of the finished product.

L'invention concerne plus précisement un matériau composite présentant un faible coefficient d'absorption aux rayons X, caractérisé en ce qu'il est constitué d'un sandwich dont l'âme est en mousse de résine organique polymérisée recouverte sur chacune de ses faces d'un produit à base de feuilles de papier imprégnées d'une résine organique polymérisée, le tout étant comprimé. The invention relates more precisely to a composite material having a low X-ray absorption coefficient, characterized in that it consists of a sandwich, the core of which is made of polymerized organic resin foam covered on each of its faces. '' a product based on sheets of paper impregnated with a polymerized organic resin, the whole being compressed.

L'invention sera mieux comprise à l'aide des explications qui vont suivre et de la figure unique jointe. The invention will be better understood using the explanations which follow and the attached single figure.

Comme le montre la figure jointe, un matériau composite conforme à l1invention se présente sous la forme d'un sandwich formé d'une âme l en mousse de rés ne organique polymérisée telle qu'une mousse de polyuréthane par exemple, de part et d'autre de laquelle sont collées deux feuilles 2 et 3 d'un produit à base de feuilles de papier imprégnées d'une résine organique polymérisée. Il s'agit de produit disponible dans le commerce connus sous le terme de "lamifié". Ces résines organiques peuvent être notamment des résines du type phénolique, epoxy, polyester. As shown in the attached figure, a composite material in accordance with the invention is in the form of a sandwich formed from a core l of polymerized organic res foam such as polyurethane foam for example, on both sides. another of which are bonded two sheets 2 and 3 of a product based on sheets of paper impregnated with a polymerized organic resin. It is a commercially available product known under the term "laminate". These organic resins can in particular be resins of the phenolic, epoxy or polyester type.

Le matériau composite résultant de la combinaison ainsi réalisée présentent, si l'on optimise les épaisseurs des différents éléments, des caractéristiques remarquables de transparence aux rayons X alliées à une excellente résistance mécanique. Il est de plus relativement bon marché et de présentation soignée. The composite material resulting from the combination thus produced have, if the thicknesses of the various elements are optimized, remarkable characteristics of transparency to X-rays combined with excellent mechanical resistance. It is also relatively inexpensive and neat presentation.

Les dim-ensions suivantes peuvent être retenues, à titre d'exemple non limitatif, pour une application de ce matériau composite selon l'invention à la fabrication par exemple de table d'examen radiologique - moussa de polyuréthane épaisseur # 20 min,
(de forte densité allant par exemple de 60 à 80 kg au m3);
- feuilles 2 et 3 en produit "lamifié" épaisseur t 1fui4 mm. The following dimensions may be used, by way of nonlimiting example, for an application of this composite material according to the invention to the manufacture, for example of a radiological examination table - polyurethane moussa thickness # 20 min,
(high density ranging for example from 60 to 80 kg per m3);
- sheets 2 and 3 in "laminated" product thickness t 1fui4 mm.

Des essais ont montré que, à caractéristiques mécaniques identiques et à puissance égale de la source émettrice, le coefficient d'absorption pour un matériau composite selon l'invention est sensiblement deux fois moins élevé que celui d'un matériau composite au fibre de carbone lui-même bien moins élevé que celui d'un contreplaqué. Tests have shown that, with identical mechanical characteristics and with equal power from the emitting source, the absorption coefficient for a composite material according to the invention is substantially two times lower than that of a composite material with carbon fiber itself. - even much lower than that of plywood.

Les applications d'un tel matériau sont nombreuses. On peut citer plus particulièrement les plateaux porte-patients et tout accessoire divers entrant dans la fabrication des appareils de radiologie.  The applications of such a material are numerous. Mention may more particularly be made of patient-carrying trays and any miscellaneous accessory used in the manufacture of radiology devices.

Claims (7)

REVENDICATIONS 1. Matériau composite présentant un faible coefficient d'absorption aux rayons X, caractérisé en ce qu'il est constitué d'un sandwich dont l'âme (l) est en mousse de résine organique polymérisée, recouverte sur chacune de ses faces d'une feuille (2) et (3), d'un produit dit lamifié. 1. Composite material having a low X-ray absorption coefficient, characterized in that it consists of a sandwich, the core (l) of which is made of polymerized organic resin foam, covered on each of its faces with a sheet (2) and (3), of a so-called laminated product. 2. Matériau composite présentant un faible coefficient d'absorption aux rayons X, selon la revendication l, caractérisé en ce que ce produit lamifié est à base de feuilles de papier imprégnées d'une résine organique polymérisée. 2. A composite material having a low X-ray absorption coefficient, according to claim 1, characterized in that this laminated product is based on sheets of paper impregnated with a polymerized organic resin. 3. Matériau selon l'une des revendications l et 2, caractérisé en ce que cette mousse est une mousse de polyuréthane. 3. Material according to one of claims l and 2, characterized in that this foam is a polyurethane foam. 4. Matériau selon l'une des revendications 2 et 3, caractérisé en ce que cette résine-est du type phénolique. 4. Material according to one of claims 2 and 3, characterized in that this resin-is of the phenolic type. 5. Matériau selon l'une des revendications 2 et 3, caractérisé en ce que cette résine est du type epoxy. 5. Material according to one of claims 2 and 3, characterized in that this resin is of the epoxy type. 6. Matériau selon rune des revendications 2 et 3, caractérisé en ce que cette résine est du type polyester. 6. Material according to one of claims 2 and 3, characterized in that this resin is of the polyester type. 7. Accessoire pour appareil de radiolooie, caractérisé en ce qu'il est réalisé au moyen d'un matériau selon l'une des revendications précédentes.  7. Accessory for radiological device, characterized in that it is produced by means of a material according to one of the preceding claims.
FR8102001A 1981-02-03 1981-02-03 Foam cored laminates for radiology applications - to minimise X=ray absorption losses and thus power and dose levels Granted FR2498922A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8102001A FR2498922A1 (en) 1981-02-03 1981-02-03 Foam cored laminates for radiology applications - to minimise X=ray absorption losses and thus power and dose levels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8102001A FR2498922A1 (en) 1981-02-03 1981-02-03 Foam cored laminates for radiology applications - to minimise X=ray absorption losses and thus power and dose levels

Publications (2)

Publication Number Publication Date
FR2498922A1 true FR2498922A1 (en) 1982-08-06
FR2498922B3 FR2498922B3 (en) 1983-10-14

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FR8102001A Granted FR2498922A1 (en) 1981-02-03 1981-02-03 Foam cored laminates for radiology applications - to minimise X=ray absorption losses and thus power and dose levels

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FR (1) FR2498922A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471568A (en) * 2009-06-30 2011-01-05 Omnia Medical table for MRI and X-ray imaging
JP2016530912A (en) * 2013-07-10 2016-10-06 アリネータ・リミテッド Radiation window for medical imaging system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471568A (en) * 2009-06-30 2011-01-05 Omnia Medical table for MRI and X-ray imaging
JP2016530912A (en) * 2013-07-10 2016-10-06 アリネータ・リミテッド Radiation window for medical imaging system
EP3019086A4 (en) * 2013-07-10 2017-06-21 Arineta Ltd. Radiation window for medical imaging systems

Also Published As

Publication number Publication date
FR2498922B3 (en) 1983-10-14

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