EP0158862A1 - Schirm zum Speichern eines Strahlungsbildes - Google Patents

Schirm zum Speichern eines Strahlungsbildes Download PDF

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Publication number
EP0158862A1
EP0158862A1 EP85103401A EP85103401A EP0158862A1 EP 0158862 A1 EP0158862 A1 EP 0158862A1 EP 85103401 A EP85103401 A EP 85103401A EP 85103401 A EP85103401 A EP 85103401A EP 0158862 A1 EP0158862 A1 EP 0158862A1
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EP
European Patent Office
Prior art keywords
radiation image
phosphor
image storage
adhesive layer
storage panel
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Granted
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EP85103401A
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English (en)
French (fr)
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EP0158862B1 (de
Inventor
Akira C/O Fuji Photo Film Co. Ltd. Kitada
Kikuo C/O Fuji Photo Film Co. Ltd. Yamazaki
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Fujifilm Holdings Corp
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Fuji Photo Film Co Ltd
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Publication of EP0158862A1 publication Critical patent/EP0158862A1/de
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K4/00—Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens

Definitions

  • This invention relates to a radiation image storage panel employed in a radiation image recording and reproducing method utilizing a stimulable phosphor, and more particularly, to a radiation image storage panel comprising a support, a phosphor layer which comprises a stimulable phosphor, an adhesive layer and a protective film, superposed in this order.
  • a radiography utilizing a combination of a radiographic film having an emulsion layer containing a photosensitive silver salt material and a radiographic intensifying screen.
  • a radiation image recording and reproducing method utilizing a stimulable phosphor as described, for instance, in U.S. Patent No. 4,239,968, has been recently paid much attention.
  • a radiation image storage panel comprising a stimulable phosphor (i.e., stimulable phosphor sheet)
  • the method involves steps of causing the stimulable phosphor of the panel to absorb radiation energy having passed through an object or having radiated from an object; sequentially exciting the stimulable phosphor with an electromagnetic wave such as visible light or infrared rays (hereinafter referred to as "stimulating rays") to release the radiation energy stored in the phosphor as light emission (stimulated emission); photoelectrically detecting the emitted light to obtain electric signals; and reproducing the radiation image of the object as a visible image from the electric signals.
  • an electromagnetic wave such as visible light or infrared rays
  • the radiation image recording and reproducing method a radiation image is obtainable with a sufficient amount of information by applying a radiation to the object at considerably smaller dose, as compared with the conventional radiography. Accordingly, the radiation image recording and reproducing method is of great value especially when the method is used for medical diagnosis.
  • the radiation image storage panel employed in the radiation image recording and reproducing method has a basic structure comprising a support and a phosphor layer provided on one surface of the support. Further, a transparent film is generally provided on the free surface (surface not facing the support) of the phosphor layer to keep the phosphor layer from chemical deterioration or physical shock.
  • the transparent protective film is generally formed on the phosphor layer by combining a thin film which is beforehand prepared, with the phosphor layer through an adhesive agent.
  • the phosphor layer comprises a binder and stimulable phosphor particles dispersed therein.
  • the stimulable phosphor emits light (gives stimulated emission) when excited with stimulating rays after having been exposed to a radiation such as X-rays. Accordingly, the radiation having passed through an object or having radiated from an object is absorbed by the phosphor layer of the radiation image storage panel in proportion to the applied radiation dose, and a radiation image of the object is produced in the panel in the form of a radiation energy-stored image.
  • the radiation energy-stored image can be released as stimulated emission (light emission) by sequentially irradiating (scanning) the panel with stimulating rays. The stimulated emission is then photoelectrically detected to obtain electric signals, so as to reproduce a visible image from the electric signals.
  • the above-described radiation image recording and reproducing method is very useful for obtaining a radi- aion image as a visible image as described hereinbefore, and it is desired for the radiation image storage panel employed in the method to provide an image of high quality (high sharpness, high graininess, etc.), as well as a radiographic intensifying screen employed in the conventional radiography.
  • the sharpness of the image in the radiation image recording and reproducing method generally depends not on the spread of the light emitted by the stimulable phosphor within the radiation image storage panel, but on the spread of stimulating rays therewithin.
  • the reason can be described as follows:
  • the radiation image stored and recorded on the panel is sequentially detected, that is, the light emitted by the panel upon excitation with the stimulating rays for a certain period of time is detected as an output from the area of the panel to be excited for said period.
  • the stimulating rays are spread through scattering or the like within the panel, an area wider than said area of the panel is excited therewith and the light emitted by the wider area thereof is detected as the output from said area.
  • a radiation image storage panel colored with such colorant is disclosed, for instance, in Japanese Patent Provisional Publication No. 57(1982)-96300 (corresponding to U.S. Patent Application No. 326,642), and as an example of such panel, the publication describes a radiation image storage panel comprising a support, a phosphor layer and a protective film, at least one of which is colored.
  • a radiation image storage panel employed in the radiation image recording and reproducing method is desirable to have a higher sensitivity and to provide an image more improved in the quality, especially for applying the method to medical diagnosis, from the viewpoint of decreasing the exposure dose for a human body and obtaining much more information. Accordingly, a further improvement in the sensitivity of the panel and the quality of the image provided thereby is desired.
  • a radiation image storage panel comprising a support, a phosphor layer which comprises a binder and a stimulable phosphor dispersed therein, an adhesive layer and a protective film, superposed in this order, characterized in that said adhesive layer is colored with a colorant capable of absorbing a portion of stimulating rays for the stimulable phosphor.
  • the improvement of sharpness of the image is achieved by coloring an adhesive layer provided between the phosphor layer and the protective film.
  • the present invention also provides a radiation image storage panel more improved in the sharpness of the image than the known panel in the comparison at the same sensitivity level.
  • a radiation image storage panel generally has a protective film and the formation thereof is usually carried out by combining a previously prepared thin film with a phosphor layer using an adhesive agent.
  • an adhesive layer of a small thickness (several um - several tens ⁇ m) with a colorant capable of selectively absorbing stimulating rays for the stimulable phosphor so as to effectively absorb the stimulating rays which have spread within the protective film.
  • the phosphor layer of the radiation image storage panel according to the present invention can be made thinner than that of the conventional panel when both having the same sensitivity, whereby the sharpness of the image provided by the panel of the invention can be further enhanced in the comparison at the same sensitivity level.
  • This can be said that the sensitivity of the panel can be further enhanced at the same sharpness level basis.
  • the radiation image storage panel of the present invention having the above-described advantages can be prepared, for instance, in the following manner.
  • the support material employed in the present invention can be selected from those employed in the conventional radiogaphic intensifying screens or those employed in the known radiation image storage panels.
  • the support material include plastic films such as films of cellulose acetate, polyester, polyethylene terephthalate, polyamide, polyimide, triacetate and polycarbonate; metal sheets such as aluminum foil and aluminum alloy foil; ordinary papers; baryta paper; resin-coated papers; pigment papers containing titanium dioxide or the like; and papers sized with polyvinyl alcohol or the like. From the viewpoint of characteristics of a radiation image storage panel as an information recording material, a plastic film is preferably employed as the support material of the invention.
  • the plastic film may contain a light-absorbing material such as carbon black, or may contain a light-reflecting material such as titanium dioxide.
  • the former is appropriate for preparing a high-sharpness type radiation image storage panel, while the latter is appropriate for preparing a high-sensitivity type radiation image storage panel.
  • one or more additional layers are occasionally provided between the support and the phosphor layer, so as to enhance the adhesion between the support and the phosphor layer, or to improve the sensitivity of the panel or the quality of an image (sharpness and graininess) provided thereby.
  • a subbing layer may be provided by coating a polymer material such as gelatin over the surface of the support on the phosphor layer side.
  • a light-reflecting layer or a light-absorbing layer may be provided by forming a polymer material layer containing a light-reflecting material such as titanium dioxide or a light-absorbing material such as carbon black.
  • one or more of these additional layers may be provided on the support.
  • the phosphor layer-side surface of the support (or the surface of a subbing layer, light-reflecting layer, or light-absorbing layer in the case that such layers are provided on the phosphor layer) may be provided with protruded and depressed portions for enhancement of the sharpness of radiographic image.
  • the phosphor layer basically comprises a binder and stimulable phosphor particles dispersed therein.
  • the stimulable phosphor gives stimulated emission when excited with stimulating rays after exposure to a radiation. From the viewpoint of practical use, the stimulable phosphor is desired to give stimulated emission in the wavelength region of 300 - 500 nm when excited with stimulating rays in the wavelength region of 400 - 900 nm.
  • Examples of the stimulable phosphor employable in the radiation image storage panel of the present invention include:
  • the divalent europium activated alkaline earth metal fluorohalide phosphor and rare earth element acitivated rare earth oxyhalide phosphor are particularly preferred, because these show stimulated emission of high luminance.
  • the above-described stimulable phosphors are given by no means to restrict the stimulable phosphor employable in the present invention. Any other phosphors can be also employed, provided that the phosphor gives stimulated emission when excited with stimulating rays after exposure to a radiation.
  • binder to be contained in the phosphor layer examples include: natural polymers such as proteins (e.g. gelatin), polysaccharides (e.g. dextran) and gum arabic; and synthetic polymers such as polyvinyl butyral, polyvinyl acetate, nitrocellulose, ethylcellulose, vinylidene chloride-vinyl chloride copolymer, polyalkyl (meth)acrylate, vinyl chloride-vinyl acetate copoymer, polyurethane, cellulose acetate butyrate, polyvinyl alcohol, and linear polyester.
  • natural polymers such as proteins (e.g. gelatin), polysaccharides (e.g. dextran) and gum arabic
  • synthetic polymers such as polyvinyl butyral, polyvinyl acetate, nitrocellulose, ethylcellulose, vinylidene chloride-vinyl chloride copolymer, polyalkyl (meth)acrylate, vinyl chloride-vinyl acetate cop
  • nitrocellulose linear polyester, polyalkyl (meth)acrylate, a mixture of nitrocellulose and linear polyester, and a mixture of nitrocellulose and polyalkyl (meth)acrylate.
  • binders may be crosslinked with a crosslinking agent.
  • the phosphor layer can be formed on the support, for instance, by the following procedure.
  • stimulable phosphor particles and a binder are added to an appropriate solvent, and then they are mixed to prepare a coating dispersion comprising the phosphor particles homogeneously dispersed in the binder solution.
  • Examples of the solvent employable in the preparation of the coating dispersion include lower alcohols such as methanol, ethanol, n-propanol and n-butanol; chlorinated hydrocarbons such as methylene chloride and ethylene chloride; ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; esters of lower alcohols with lower aliphatic acids such as methyl acetate, ethyl acetate and butyl acetate; ethers such as dioxane, ethylene glycol monoethylether and ethylene glycol monoethyl ether; and mixtures of the above-mentioned compounds.
  • lower alcohols such as methanol, ethanol, n-propanol and n-butanol
  • chlorinated hydrocarbons such as methylene chloride and ethylene chloride
  • ketones such as acetone, methyl ethyl ketone and methyl isobutyl
  • the ratio between the binder and the stimulable phosphor in the coating dispersion may be determined according to the characteristics of the aimed radiation image storage panel and the nature of the phosphor employed. Generally, the ratio therebetween is within the range of from 1 : 1 to 1 : 100 (binder : phosphor, by weight), preferably from 1 : 8 to 1 : 40.
  • the coating dispersion may contain a dispersing agent to improve the dispersibility of the phosphor particles therein, and may contain a variety of additives such as a plasticizer for increasing the bonding between the binder and the phosphor particles in the phosphor layer.
  • a dispersing agent examples include phthalic acid, stearic acid, caproic acid and a hydrophobic surface active agent.
  • plasticizer examples include phosphates such as triphenyl phosphate, tricresyl phosphate and diphenyl phosphate; phthalates such as diethyl phthalate and dimethoxyethyl phthalate; glycolates such as ethylphthalyl ethyl glycolate and butylphthalyl butyl glycolate; and polyesters of polyethylene glycols with aliphatic dicarboxylic acids such as polyester of triethylene glycol with adipic acid and polyester of diethylene glycol with succinic acid.
  • phosphates such as triphenyl phosphate, tricresyl phosphate and diphenyl phosphate
  • phthalates such as diethyl phthalate and dimethoxyethyl phthalate
  • glycolates such as ethylphthalyl ethyl glycolate and butylphthalyl butyl glycolate
  • the coating dispersion containing the phosphor particles and the binder prepared as described above is applied evenly onto the surface of the support'to form a layer of the coating dispersion.
  • the coating procedure can be carried out by a conventional method such as a method using a doctor blade, a roll coater or a knife coater.
  • the coating dispersion After applying the coating dispersion onto the support, the coating dispersion is then heated slowly to dryness so as to complete the formation of a phosphor layer.
  • the thickness of the phosphor layer varies depending upon the characteristics of the aimed radiation image storage panel, the nature of the phosphor, the ratio between the binder and the phosphor, etc. Generally, the thickness of the phosphor layer is within a range of from 20 ⁇ m to 1 mm, and preferably from 50 to 500 um.
  • the phosphor layer can be provided onto the support by the methods other than that given in the above.
  • the phosphor layer is initially prepared on a sheet (false support) such as a glass plate, metal plate or plastic sheet using the aforementioned coating dispersion and then thus prepared phosphor layer is superposed on the genuine support by pressing or using an adhesive agent.
  • a protective film is formed through a colored adhesive layer, which is a characteristic requisite of the present invention.
  • Examples of adhesive agents employable for the preparation of the adhesive layer in the invention include a polyacrylic resin, a polyester resin, a polyurethane resin, a polyvinyl acetate resin and ethylene-vinyl acetate copolymers.
  • the adhesive agent employable in the invention is by no means restricted to the above- listed resins, and for instance, other known resins which are conventionally used as an adhesive agent can be employed.
  • the colorant employed for coloring the adhesive layer is one capable of absorbing at least a portion of the stimulating rays for the stimulable phosphor constituting the phosphor layer of the radiation image storage panel.
  • the colorant preferably has such reflection characteristics that the mean reflectance in the wavelength region of the stimulating rays for the stimulable phosphor is lower than the mean reflectance in the wavelength region of the light emitted by said stimulable phosphor upon stimulation thereof.
  • the mean reflectance of the colorant in the wavelength region of the stimulating rays is as low as possible.
  • the mean reflectance of the colorant in the wavelength region of the light emitted by the stimulable phosphor is as high as possible.
  • the preferred colorant depends on the nature of the stimulable phosphor employed in the radiation image storage panel. From the viewpoint of practical use, the stimulable phosphor is preferred to give stimulated emission in the wavelength region of 300 - 500 nm when excited with stimulating rays in the wavelength region of 400 - 900 nm as described above.
  • Employable for such a stimulable phosphor is a colorant having a body color ranging from blue to green so that the mean reflectance thereof in the wavelength region of the stimulating rays is lower than the mean reflectance thereof in the wavelength region of the emitted light and that the difference therebetween is as large as possible.
  • Examples of the colorant employable in the invention include the colorants disclosed in Japanese Patent Provisional Publication No. 55(1980)-163500 (corresponding to U.S. Patent No. 4,394,581), that is: organic colorants such as Zapon Fast Blue 3G (available from Hoechst AG), Estrol Brill Blue N-3RL (available from Sumitomo Cheimcal Co., Ltd.), Sumiacryl Blue F-GSL (available from Sumitomo Chemical Co., Ltd.), D & C Blue No.1 (available from National Aniline), Spirit Blue (available from Hodogaya Chemical Co., Ltd.), Oil -Blue No.603 (available from Orient Co., Ltd.), Kiton Blue A (available from Ciba-Geigy), Aizen Cathilon Blue GLH (available from Hodogaya Chemical Co, Ltd.), Lake Blue A.F.H (available from Kyowa Sangyo Co., Ltd.), Rodalin Blue 6GX (available from Kyowa Sangyo Co.
  • Lionol Blue SL available from Toyo Ink Mfg. Co., Ltd.
  • inorganic colorants such as ultramarine blue, cobalt blue, ceruleanblue, chromium oxide, TiO 2 -ZnO-CoO-NiO pigment, and the like.
  • Examples of the colorant employable in the invention also include the colorants described in the aforementioned U.S. Patent Application No. 326,642, that is: organic metal complex salt colorants having Color Index No. 24411, No. 23160, No. 74180, No. 74200, No. 22800, No. 23150, No. 23155, No. 24401, No. 14880, No. 15050, No. 15706, No. 15707, No. 17941, No. 74220, No. 13425, No. 13361, No. 13420, No. 11836, No. 74140, No. 74380, No. 74350, No. 74460, and the like.
  • colorants having a body color from blue to green particularly preferred are the organic metal complex salt colorants which show no emission in the wavelength region longer than that of the stimulating rays as described in the latter U.S. Patent Application No. 326,642, from the viewpoint of the graininess and the contrast of the resulting image.
  • a colored adhesive layer can be arranged in combination with protective film on the phosphor layer, for instance, by the following procedure:
  • the above-described resin and a colorant are added to an appropriate solvent and they are sufficiently mixed to prepare a homogeneous coating dispersion for an adhesive layer.
  • the solvent can be selected from the solvents employable in the preparation of a phosphor.-layer as mentioned hereinbefore.
  • the coating dispersion is applied evenly onto the transparent thin film to form a layer thereof.
  • the coating procedure can be carried out by a conventional method such as a method using a doctore blade, a roll coater or a knife coater.
  • the transparent thin film having the layer of the coating dispersion is placed on the phosphor layer in such a manner that the layer of the coated dispersion faces the phosphor layer and then fixed (laminated) thereto, so as to complete the simultaneous formation of the colored adhesive layer and the protective film on the phosphor layer.
  • the thickness of the colored adhesive layer varies depending upon the characteristics of the aimed radiation image storage panel, the nature of the phosphor layer or the protective film, the natures of the resin and the colorant. In general, the thickness of the colored adhesive layer is within the range of from 0.1 to 10 ⁇ m.
  • the ratio between the resin and the colorant in the coating dispersion is within the range of from 10 : 1 to 10 6 : 1 (resin : colorant, by weight) in the case of a dye colorant.
  • the ratio therebetween is within the range of from 1 : 10 to 10 5 : 1, (resin : colorant, by weight) in the case of a pigment colorant.
  • the mean reflectance of thus formed colored adhesive layer in the wavelength region of the light emitted by the stimulable phosphor upon stimulation thereof is as high as possible.
  • the mean reflectance of the colored adhesive layer is preferably not lower than 20 % of the mean reflectance of an adhesive layer equivalent to said adhesive layer except for being uncolored with the colorant in the same wavelength region.
  • the mean reflectance of the colored adhesive layer in the wavelength region of the stimulating rays for the stimulable phosphor is as low as possible.
  • the mean reflectance of the colored adhesive layer is not higher than 95 % of the mean reflectance of the uncolored adhesive layer equivalent to said adhesive layer in the same wavelength region.
  • the term "reflectance" used herein means a reflectance measured by use of an intergrating-sphere photometer.
  • the material for the transparent protective film which can be formed as above include previously prepared transparent thin films which are made of polyethylene terephthalate, polyethylene, vinylidene chloride, polyamide, etc.
  • the transparent protective film preferably has a thickness within the range of approx. 3 to 20 ⁇ m.
  • a divalent europium activated barium fluorobromide (BaFBr:Eu 2+ ) phosphor particles and a acrylic resin was added methyl ethyl ketone to prepare a dispersion containing the phosphor particles and the binder in the ratio of 30 : 1 (phosphor : binder, by weight).
  • Tricresyl phosphate, n-buthanol and methyl ethyl ketone were added to the dispersion and the mixture was sufficiently stirred by means of a propeller agitater to obtain a homogeneous coating dispersion having a viscosity of 25 - 35 PS (at 25 0 C).
  • the coating dispersion was applied evenly onto a polyethylene terephthalate sheet (support, thickness: 250 um) placed horizontally on a glass plate.
  • the application of the coating dispersion was carried out using a doctor blade.
  • the support having the coating dispersion was placed in an oven and heated at a temperature gradually rising from 25 to 100°C.
  • a phosphor layer having the thickness of approx. 300 um was formed on the support.
  • a polyester resin (adhesive agent; Byron #300, maunfactured by Toyobo Co., Ltd.) was dissolved in methyl ethyl ketone to prepare a solution of the adhesive agent.
  • a dye colorant copper phthalocyanine
  • a coating dispersion was applied onto a transparent polyethylene terephthalate film (protective film, thickness: 12 ⁇ m) in the amount of 2 g./m 2 in the same manner as described above to form a layer of a colored adhesive agent.
  • the transparent film provided with the layer of the colored adhesive agent was placed on the phosphor layer in such a manner that said layer faced the phosphor layer and then combined therewith through the colored adhesive layer.
  • a radiation image storage panel consisting of a support, a phosphor layer, a colored adhesive layer and a transparent protective film was prepared (Panel a).
  • the amount of the dye colorant employed for coloring the adhesive layer was varied within the range of 0.1 - 1.0 % (by solid content) of the adhesive agent, to prepare a variety of radiation image storage panels consisting of a support, a phosphor layer, a colored adhesive layer and a transparent protective film, in which the adhesive layers were colored in the different degrees (Panels A).
  • a colored phosphor layer was formed on the support in the same manner as described in Example 1 except that a dye colorant (copper phthalocyanine) was added to the coating dispersion for a phosphor layer in the amount of 0.1 % (by solid content) of the binder.
  • a dye colorant copper phthalocyanine
  • Example 1 the procedure of Example 1 was repeated except for adding no dye colorant to the coating dispersion for an adhesive layer, to prepare a radiation image storage panel consisting of a support, a colored phosphor layer, an adhesive layer and a transpatent protective film (Panel b).
  • the amount of the dye colorant employed for coloring the phosphor layer was varied within the range of 0.1 - 1.0 % (by solid content) of the binder, to prepare a variety of radiation image storage panels consisting of a support, a colored phosphor layer, an adhesive layer and a transparent protective film, in which the phosphor layers were colored in the different digrees (Panels B).
  • the radiation image storage panels (Panels a, A, b and B) prepared as above were evaluated on the sharpness of the image provided thereby and the sensitivity thereof according to the following test.
  • the radiation image storage panel was exposed to X-rays at voltage of 80 KVp through an MTF chart and subsequently scanned with an He-Ne laser beam (wavelength: 632.8 nm) to excite the phosphor particles contained in the panel.
  • the light emitted by the phosphor layer of the panel was detected and converted to electric signals by means of a photosensor (photomultiplier having spectral sensitivity of type S-5). From the electric signals a radiation image of the MTF chart was reproduced as a visible image by an image reproducing apparatus, and the modulation transfer function (MTF) value of the visible image was determined.
  • MTF modulation transfer function
  • the radiation image storage panel was exposed to X-rays at voltage of 80 KVp and subsequently scanned with an He-Ne laser beam (wavelength: 632.8 nm) to excite the phosphor.
  • the light emitted by the phosphor layer of the panel was detected by means of the above-mentioned photosensor to measure the sensitivity thereof.
  • Fig. 1 illustrates
  • a difference (decrement) of the relative sensitivity is plotted and as ordinate a difference (increment) of the sharpness of the image is plotted, both being calculated by employing Panel b as a criterion (relative sensitivity: 100, MTF value at the spatial frequency of 2 cycle/mm: 35 %).
  • Fig. 2 illustrates
  • the radiation image storage panel of the present invention (Panel a) is remarkably improved in the sharpness of the image as compared with the conventional radiation image storage panel (Panel b).
  • Example 1 The procedure of Example 1 was repeated except that the phosphor layer was formed in the thickness of 150 ⁇ m, to prepare a radiation image storage panel consisting of a support, a phosphor layer, a colored adhesive layer and a transpatent protective film.
  • the amount of the dye colorant employed for coloring an adhesive layer was varied within the range of 0.1 - 1.0 % (by solid content) of the adhesive agent, to prepare a variety of radiation image storage panels consisting of a support, a phosphor layer, a colored adhesive layer and a transparent protective film, in which the adhesive layers were colored in different degrees (Panels C).
  • the radiation image storage panels (Panels C and d) prepared as above were evaluated on the sharpness of the image provided thereby and the sensitivity thereof according to the above-described tests.
  • Line C indicates a relationship between a relative sensitivity and a sharpness with respect to Panels C (Example 2).
  • Panel d relative sensitivity: 100, MTF value at the spatial frequency of 2 cycle/mm: 55 %) was employed.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Conversion Of X-Rays Into Visible Images (AREA)
EP19850103401 1984-03-23 1985-03-22 Schirm zum Speichern eines Strahlungsbildes Expired EP0158862B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP55906/84 1984-03-23
JP5590684A JPS60200200A (ja) 1984-03-23 1984-03-23 放射線像変換パネル

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EP0158862A1 true EP0158862A1 (de) 1985-10-23
EP0158862B1 EP0158862B1 (de) 1987-10-28

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230324A2 (de) * 1986-01-24 1987-07-29 Kasei Optonix, Ltd. Gradientfolie zur Umwandlung eines Strahlungsbildes
EP0522609A1 (de) * 1991-07-12 1993-01-13 Agfa-Gevaert N.V. Lumineszenter Artikel verwendet in der Radiographie
US6652994B2 (en) * 2000-10-20 2003-11-25 Konica Corporation Radiation image conversion panel
US6707057B2 (en) 2000-03-23 2004-03-16 Agfa-Gevaert Storage phosphor screen with thick outermost layer and a method for using the same
US11200999B2 (en) 2015-12-14 2021-12-14 Carestream Dental Technology Topco Limited Radiation sensing thermoplastic composite panels

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0680875U (ja) * 1993-04-19 1994-11-15 広和株式会社 可搬式粘性流体供給ポンプ
JP3480516B2 (ja) * 1993-09-20 2003-12-22 富士写真フイルム株式会社 放射線画像変換パネルおよび放射線画像読取方法
JP3537345B2 (ja) * 1998-03-13 2004-06-14 富士写真フイルム株式会社 輝尽性蛍光体シート及び放射線像記録再生方法
JP2002277590A (ja) * 2001-03-16 2002-09-25 Konica Corp 放射線像変換パネルおよびその製造方法
JP2002357699A (ja) * 2001-05-31 2002-12-13 Konica Corp 放射線画像変換パネル
WO2017105537A1 (en) * 2015-12-14 2017-06-22 Carestream Health, Inc. Radiation sensing thermoplastic composite panels
US20180374597A1 (en) * 2015-12-14 2018-12-27 Carestream Dental Technology Topco Limited Radiation Sensing Thermoplastic Composite Panels

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305758A1 (fr) * 1975-03-26 1976-10-22 Agfa Gevaert Ag Couche adhesive pour ecrans intensificateurs des rayons x sur une couche support de polyterephtalate d'ethylene

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305758A1 (fr) * 1975-03-26 1976-10-22 Agfa Gevaert Ag Couche adhesive pour ecrans intensificateurs des rayons x sur une couche support de polyterephtalate d'ethylene

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230324A2 (de) * 1986-01-24 1987-07-29 Kasei Optonix, Ltd. Gradientfolie zur Umwandlung eines Strahlungsbildes
EP0230324A3 (en) * 1986-01-24 1988-07-13 Kasei Optonix, Ltd. Gradient radiation image conversion sheet
US4816350A (en) * 1986-01-24 1989-03-28 Kasei Optonix Ltd. Gradient radiation image conversion sheet
EP0522609A1 (de) * 1991-07-12 1993-01-13 Agfa-Gevaert N.V. Lumineszenter Artikel verwendet in der Radiographie
US6707057B2 (en) 2000-03-23 2004-03-16 Agfa-Gevaert Storage phosphor screen with thick outermost layer and a method for using the same
US6652994B2 (en) * 2000-10-20 2003-11-25 Konica Corporation Radiation image conversion panel
US11200999B2 (en) 2015-12-14 2021-12-14 Carestream Dental Technology Topco Limited Radiation sensing thermoplastic composite panels

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EP0158862B1 (de) 1987-10-28
JPS60200200A (ja) 1985-10-09
JPH0452920B2 (de) 1992-08-25
DE3560852D1 (en) 1987-12-03

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