EP0276566B1 - Elément radiographique à effet interimage réduit - Google Patents

Elément radiographique à effet interimage réduit Download PDF

Info

Publication number
EP0276566B1
EP0276566B1 EP19870311289 EP87311289A EP0276566B1 EP 0276566 B1 EP0276566 B1 EP 0276566B1 EP 19870311289 EP19870311289 EP 19870311289 EP 87311289 A EP87311289 A EP 87311289A EP 0276566 B1 EP0276566 B1 EP 0276566B1
Authority
EP
European Patent Office
Prior art keywords
dye
radiographic element
further characterized
element according
radiographic
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.)
Expired
Application number
EP19870311289
Other languages
German (de)
English (en)
Other versions
EP0276566A1 (fr
Inventor
Donald Richard Eastman Kodak Company Diehl
Ronda Ellen Eastman Kodak Company Factor
Robert Edward Eastman Kodak Company Dickerson
James Edward Eastman Kodak Company Kelly
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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
Priority claimed from US07/073,256 external-priority patent/US4803150A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0276566A1 publication Critical patent/EP0276566A1/fr
Application granted granted Critical
Publication of EP0276566B1 publication Critical patent/EP0276566B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/16—X-ray, infrared, or ultraviolet ray processes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/83—Organic dyestuffs therefor
    • G03C1/832—Methine or polymethine dyes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G03C2001/7448—Dispersion
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C2200/00—Details
    • G03C2200/44—Details pH value
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C2200/00—Details
    • G03C2200/46—Details pKa value

Definitions

  • the invention relates to radiography. More specifically, the invention relates to double coated silver halide radiographic elements of the type employed in combination with intensifying screens.
  • silver halide photographic elements are capable of directly recording X ray exposures, they are more responsive to light within the visible spectrum. It has become an established practice to construct Duplitized@ (double coated) radiographic elements in which silver halide emulsion layers are coated on opposite sides of a film support and to sandwich the radiograph element between intensifying screen pairs during imaging.
  • the intensifying screens contain phosphors that absorb X radiation and emit light. This light is transmitted to the silver halide emulsion layer on the adjacent face of the film support. The result is that diagnostic radiographic imaging is achieved at significantly reduced X-ray exposure levels.
  • mordants have been employed to reduce dye migration, they have not been effective in preventing loss of photographic speed and have further proved disadvantageous in increasing the bulk of the water permeable layers of the radiographic elements, thereby increasing the processing time required to produce a processed element that is dry to the touch.
  • the dissolved dye approach to crossover reduction is illustrated by Door- selaer U.K. Pat. Spec. 1,414,456 and Bollen et al U.K. Pat. Spec. 1,477,638 and 1,477,639.
  • It is an object of the invention to provide a radiographic element which exhibits reduced crossover without objectionable dye stain comprised of a film support capable of transmitting radiation to which the radiographic element is responsive having opposed major faces, processing solution permeable hydrophilic colloid layers are present including, coated on each opposed major face, at least one silver halide emulsion layer capable of responding to electromagnetic radiation in the visible portion of spectrum and at least one other hydrophilic colloid layer interposed between the emulsion layer and the support, and a dye dispersed in at least one of the interposed hydrophilic colloid layers capable of (i) absorbing visible radiation to which the radiographic element is responsive to reduce crossover and (ii) capable of being decolorized in a processing solution.
  • a radiographic element of the type described element is characterized in that the dye is, prior to processing, in the form of microcrystalline particles present in a concentration sufficient to reduce crossover to less than 10 percent and is capable of being substantially decolorized in less than 90 seconds during processing.
  • the present invention offers significant and unexpected advantages over the prior state of the art. Crossover is reduced below levels heretofore successfully achieved in the art and without desensitization of latent image forming silver halide grains.
  • the extremely low crossover levels realized have been made possible by discovering that dyes incorporated in a radiographic element in the form microcrystalline particles can be nevertheless satisfactorily decolorized during the very short processing interval conventionally employed in preparing radiographic images.
  • the crossover reducing dyes in microcrystalline form migration of the dyes to latent image forming silver halide grains surfaces and resulting desensitization of these grains is obviated.
  • the present invention permits simpler radiographic element construction than is possible with radiographic elements employing a nonimaging silver halide grains to provide dye adsorption surfaces.
  • the microcrystalline form of the dyes allows superior spectral adsorption profiles to be realized as compared to the same or chromophorically similar dyes adsorbed to silver halide grain surfaces.
  • crossover reduction advantages of the present invention are fully compatible with both the crossover reduction and other known advantages of high aspect ratio and thin, intermediate aspect ratio tabular grain silver halide emulsions.
  • a radiographic element 100 is positioned between a pair of light emitting intensifying screens 201 and 202.
  • the radiographic element support is comprised of a radiographic support element 101, typically transparent or blue tinted, capable of transmitting at least a portion of the light to which it is exposed and optional, similarly transmissive subbing layer units 103 and 105, each of which can be formed of one or more adhesion promoting layers.
  • On the first and second opposed major faces 107 and 109 of the support formed by the subbing layer units are crossover reducing hydrophilic colloid layers 111 and 113, respectively.
  • each of the emulsion layer units is formed of one or more hydrophilic colloid layers including at least one silver halide emulsion layer.
  • Overlying the emulsion layer units 115 and 117 are optional protective overcoat layers 119 and 121, respectively. All of the protective layers and hydrophilic colloid layers are permeable to processing solutions.
  • the assembly is imagewise exposed to X radiation.
  • the X radiation is principally absorbed by the intensifying screens 201 and 202, which promptly emit light as a direct function of X ray exposure.
  • the intensifying screens 201 and 202 which promptly emit light as a direct function of X ray exposure.
  • the light recording latent image forming emulsion layer unit 115 is positioned adjacent this screen to receive the light which it emits. Because of the proximity of the screen 201 to the emulsion layer unit 115 only minimal light scattering occurs before latent image forming absorption occurs in this layer unit. Hence light emission from screen 201 forms a sharp image in emulsion layer unit 115.
  • crossover reducing layers 111 and 113 are interposed between the screen 201 and the remote emulsion layer unit and are capable of intercepting and attenuating this remaining light. Both of these layers thereby con tribute to reducing cross- over exposure of emulsion layer unit 117 by the screen 201.
  • the screen 202 produces a sharp image in emulsion layer unit 117, and the light absorbing layers 111 and 113 similarly reduce crossover exposure of the emulsion layer unit 115 by the screen 202.
  • the crossover reducing layers on opposite sides of the support can be used to' absorb radiation from different regions of the spectrum.
  • a light absorbing dye can be present in one crossover reducing layer while an ultraviolet (UV) absorber is present in the remaining crossover reducing layer.
  • UV ultraviolet
  • the radiographic element 100 is removed from association with the intensifying screens 210 and 202 and processed in a conventional manner. That is, the radiographic element is brought into contact with an aqueous alkaline developer, such as a hydroquinone-Phenidone@(1-phenyi-3-pyrazoiidone) developer having a pH of 10.0, a specific form of which is illustrated in the examples below.
  • the alkaline developer permeates the hydrophilic colloid layers, converting the silver halide emulsion layer latent image to a viewable silver image and simultaneously decolorizing the crossover reducing layers.
  • Conventional post development steps such as stop bath contact, fixing, and washing can occur.
  • the radiographic elements of this invention are fully compatible with conventional radiographic element processing, such as in an RP-X-Omat@ processor.
  • the radiographic elements of the present invention offer advantages in crossover reduction by employing one or more crossover reducing layers comprised a hydrophilic colloid employed as a dispersing vehicle and a particulate dye.
  • concentration of the dye present is chosen to impart an optical density of at least 1.00 at the peak wavelength of emulsion sensitivity. Since it is conventional practice to employ intensifying screen-radiographic element combinations in which the peak emulsion sensitivity matches the peak light emission by the intensifying screens, it follows that the dye also exhibits a density of at least 1.00 at the wavelength of peak emission of the intensifying screen.
  • particulate dyes including combinations of particulate dyes, capable of imparting a density of 1.00 or more over the entire spectral region of significant sensitivity and emission.
  • particulate dyes for radiographic elements to be used with blue emitting intensifying screens, such as those which employ calcium tungstate or thulium activated lanthanum oxybromide phosphors, it is generally preferred that the particulate dye be selected to produce an optical density of at least 1.00 over the entire spectral region of 400 to 500 nm.
  • the particulate dye exhibit a density of at least 1.00 over the spectral region of 450 to 550 nm. To the extent the wavelength of emission of the screens or the sensitivities of the emulsion layers are restricted, the spectral region over which the particulate dye must also effectively absorb light is correspondingly reduced.
  • particulate dye optical densities of 1.00 chosen as described above are effective to reduce crossover to less than 10 percent, it is specifically recognized that particulate dye densities can be increased until radiographic element crossover is effectively eliminated. For example, by increasing the particulate dye concentration so that it imparts a density of 10.0 to the radiographic element, crossover is reduced to only 1 percent.
  • the size of the dye particles is chosen to facilitate coating and rapid decolorization of the dye. In general smaller dye particles lend themselves to more uniform coatings and more rapid decolorization.
  • the dye particles employed in all instances have a mean diameter of less than 10.0 ⁇ m and preferably less than 1.0 ⁇ m. There is no theoretical limit on the minimum sizes the dye particles can take.
  • the dye parti- des can be most conveniently formed by crystallization from solution in sizes ranging down to about 0.01 ⁇ .tm or less. Where the dyes are initially crystallized in form of particles larger than desired for use, conventional techniques for achieving smaller particle sizes can be employed, such as ball milling, roller milling, sand milling, and the like.
  • hydrophilic colloids can take any of various conventional forms, such as any of the forms set forth in Research Disclosure, Vol. 176, December 1978, Item 17643, Section IX. Vehicles and vehicle extenders, the hydrophilic colloid layers are most commonly gelatin and gelatin derivatives. Hydrophilic colloids are typically coated as aqueous solutions in the pH range or from about 5 to 6, most typically from 5.5 to 6.0, to form radiographic element layers.
  • the dyes which are selected for use in the practice of this invention are those which are capable of remaining in particulate form at those pH levels in aqueous solutions.
  • Dyes which by reason of their chromophoric make up are inherently ionic, such as cyanine dyes, as well as dyes which contain substituents which are ionically dissociated in the above-noted pH ranges of coating may in individual instances be sufficiently insoluble to satisfy the requirements of this invention, but do not in general constitute preferred classes of dyes for use in the practice of the invention.
  • dyes with sulfonic acid substituents are normally too soluble to satisfy the requirements of the invention.
  • nonionic dyes with carboxylic acid groups (depending in some instances on the specific substitution location of the carboxylic acid group) are in general insoluble under aqueous acid coating conditions. Specific dye selections can be made from known dye characteristics or by observing solubilities in the pH range of from 5.5 to 6.0 at normal layer coating temperatures- e.g., at a reference temperature of 40 ° C.
  • Preferred particulate dyes are nonionic polymethine dyes, which include the merocyanine, oxonol, hemioxonol, styryls, and arylidene dyes.
  • the merocyanine dyes include, joined by a methine linkage, at least one basic heterocyclic nucleus and at least one acidic nucleus.
  • Basic nuclei such as azolium or azinium nuclei, for example, include those derived from pyridinium, quinolinium, isoquinolinium, oxazolium, pyrazolium, pyrrolium, indolium, oxadiazo- lium, 3H- or 1 H-benzoindolium, pyrrolopyridinium, phenanthrothiazolium, and acenaphthothiazolium quaternary salts.
  • Exemplary of the basic heterocyclic nuclei are those satisfying Formulae I and II. where
  • Merocyanine dyes link one of the basic heterocyclic nuclei described above to an acidic keto methylene nucleus through a methine linkage as described above.
  • Exemplary acidic nuclei are those which satisfy Formula III.
  • Useful hemioxonol dyes exhibit a keto methylene nucleus as shown in Formula III and a nucleus as shown in Formula IV.
  • Exemplary oxonol dyes exhibit two keto methylene nuclei as shown in Formula III joined through one or higher uneven number of methine groups.
  • Useful arylidene dyes exhibit a keto methylene nucleus as shown in Formula III and a nucleus as shown in Formula V joined by a methine linkage as described above containing one or a higher uneven number of methine groups.
  • G3 and G4 are as previously defined.
  • a specifically preferred class of oxonol dyes for use in the practice of the invention are the oxonol dyes satisfying Formula VI. wherein
  • Exemplary of specific preferred oxonol dyes are those set forth below in Table I.
  • a specifically preferred class of arylidene dyes for use in the practice of the invention are the arylidene dyes satisfying Formula VII. wherein
  • Exemplary of specific preferred arylidene dyes are those set forth below in Tables II and III.
  • UV absorber either blended with the dye in each of crossover reducing layers 111 and 113 or confined to one crossover reducing layer with the dye being confined to the other crossover reducing layer.
  • Any conventional UV absorber can be employed for this purpose.
  • Illustrative useful UV absorbers are those disclosed in Research Disclosure, Item 18431, cited above, Section V, or Research Disclosure, Item 17643, cited above, Section Vl-ILC.
  • Preferred UV absorbers are those which either exhibit minimal absorption in the visible portion of the spectrum or are decolorized on processing similarly as the crossover reducing dyes.
  • the remaining features of the dual coated radiographic elements can take any convenient conventional form.
  • Such conventional radiographic element features are illustrated, for example, in Research Disclosure, Item 18431, cited above.
  • Other conventional features common to both silver halide radiographic elements and photographic elements are disclosed in Research Disclosure, Item 17643, cited above.
  • Radiographic elements according to this invention having highly desirable imaging characteristics are those which employ one or more tabular grain silver halide emulsions.
  • Preferred radiographic elements according to the present invention are those which employ one or more high aspect ratio tabular grain emulsions or thin, intermediate aspect ratio tabular grain emulsions.
  • Preferred tabular grain emulsions for use in the radiographic elements of this invention are those in which tabular silver halide grains having a thickness of less than 0.5 ⁇ m (preferably less than 0.3 11m and optimally less than 0.2 11m) have an average aspect ratio of greater than 5:1 (preferably greater than 8:1 and optimally at least 12:1) and account for greater than 50 percent (preferably greater than 70 percent and optimally greater than 90 percent) of the total projected area of the silver halide grains present in the emulsion.
  • Preferred blue and minus blue spectral sensitizing dyes as well as optimum chemical and spectral sensitizations of tabular silver halide grains are disclosed by Kofron et al U.S. Patent 4,439,520.
  • the preferred radiographic elements of this invention are those which employ one or more of the crossover reducing layers described above in combination with tabular grain latent image forming emulsions.
  • Preferred radiographic element and tabular grain silver halide emulsion features are disclosed in Abbott et al U.S. Patents 4,425,425 and 4,425,426 and Dickerson U.S. Patent 4,414,304.
  • Radiographic elements can be constructed according to this invention in which tabular grain silver halide emulsion layers are coated nearer the support than nontabular grain silver halide emulsion layers to reduce crossover, as illustrated by Sugimoto European Patent Application 0,084,637.
  • radiographic elements By employing tabular grain emulsions, which in themselves reduce crossover in combination with the crossover reducing layers provided by this invention radiographic elements exhibiting extremely low crossover levels can be achieved while also achieving high photographic speed, low levels of granularity, high silver covering power, and rapid processing capabilities deemed highly desirable in radiography.
  • the following examples compare the performance of double coated radiographic elements exposed using blue emitting thulium activating lanthanum oxybromide phosphor intensifying screens.
  • the radiographic elements were identical, except for the choice of the crossover reducing materials employed between the emulsion layer and the support on each major surface.
  • the dye satisfying the requirements of the invention was Dye 1/A shown above in Table II.
  • the dye was employed in a particulate form, the mean diameter of the dye particles being 0.08 1 1m.
  • C-1 Tartrazine Yellow
  • M-1 cationic mordant poly(1-methyl-2-vinylpyridinium p-toluene sulfonate
  • CLS Carey Lea Silver
  • One control element was constructed with the same hydrophilic colloid layers, but without a crossover reducing material being present. This element is referred to as C-0.
  • An emulsion layer was coated over each hydrophilic colloid layer.
  • the blue recording silver bromide emulsion layer was coated at a coverage of 2.2 g/m 2 silver and 2.2 g/m 2 gelatin.
  • hydrophilic colloid layers (including the emulsion layers) were hardened with bis(vinylsulfonylmethyl) ether at 1.0% of the gelatin weight.
  • samples of the dual coated radiographic elements were exposed with a single intensifying screen placed in contact with one emulsion layer. Black paper was placed against the other emulsion side of the sample.
  • the X-radiation source was a Picker VTX653 3-phase X-ray machine, with a Dunlee High-Speed PX1431-CQ-150 kVp 0.7/1.4mm focus tube.
  • Exposure was made at 70 kVp, 32mAs, at a distance of 1.40 m. Filtration was with 3 mm AI equivalent (1.25 inherent + 1.75 al); Half Value Layer (HVL) - 2.6 mm Al. A 26 step AI wedge was used, differing in thickness by 2 mm per step.
  • the film was in contact with the developer in each instance for less than 90 seconds.
  • Percent crossover is reported in Table IV below. Relative speed reported in Table IV is the speed of the emulsion layer nearest the support.
  • This example demonstrates the satisfactory performance of a bleachable particulate dye to reduce crossover without producing dye stain in the processed radiographic element and with only minimal impact on imaging speed.
  • the control crossover reducing materials were unacceptable because of their high dye stain, and the control dye was unacceptable in producing an increased loss in imaging speed.
  • the control dye required the further incorporation of a mordant, which added to the drying load on the processor. Without the mordant being present the imaging speed loss would have been significantly higher.
  • Examples 1 through 6 The procedure of Examples 1 through 6 was repeated, except that magenta dyes were substituted for testing, green sensitized radiographic emulsions were employed, and green emitting intensifying screens, Kodak Lanex Regular@ screens, were employed.
  • the dye satisfying the requirements of the invention was Dye 4/A shown above the Table II.
  • the dye was employed in a particulate form, the mean diameter of the dye particles being 0.2 ⁇ m.
  • Acid Magenta (C.I. Acid Violet 19-C.I. 42,685), hereinafter referred to as C-2, was selected as a control exemplary of dyes which are water soluble and bleachable taught by the art to be used as a crossover reducing dye in a double coated radiographic element.
  • C-2 Acid Magenta
  • M-1 cationic mordant M-1 was employed in a 5 parts mordant to 1 part dye weight ratio.
  • C-3 1,3-Bis[i-(4-sulfonylphenyl)-3-carboxy-2-pyrazolin-5-one-4] trimethine oxonol, disodium salt, hereinafter referred to as C-3, was selected as a control exemplary of magenta dyes which are water soluble and nonbleachable.
  • Dye C-3 differed from dye 10 disclosed on page 5 of U.K. Pat. Spec. 1,414,456 only in that the nuclei were joined by 3 methine groups instead of 5 (to shift absorption into the desired green spectral region). To reduce wandering of the dye cationic mordant M-1 was again employed in a 5 parts mordant to 1 part dye weight ratio.
  • the precipitate containing the dye was then purified through a number of washing and dissolu- tion/recrystallization steps.
  • the precipitate was first slurried in 500 ml refluxing glacial acetic acid, cooled to room temperature, filtered, washed with 250 ml acetic acid, 250 ml H 2 0, 250 ml methanol, and then dried. It was then dissolved in 100 ml hot dimethylsulfoxide and cooled to 40 ° C. 300 ml methanol was added, upon which a red precipitate formed, which was filtered, washed with methanol, acetone, and ligroin, and dried.
  • This precipitate was dissolved in 200 ml methanol and 6 ml (4.38 g) triethylamine and heated to reflux. 4.8 ml of concentrated hydrochloric acid was added and a fine red precipitate was formed. The solution was filtered while hot and the precipitate was washed with methanol and acetone and dried. The precipitate was then dissolved in a refluxing mixture of 200 ml ethanol and 6.0 ml (4.38 g) triethylamine. 9.0 g of sodium iodide dissolved in 50 ml methanol was added. Upon cooling to room temperature, a red precipitate formed. The mixture was chilled in ice for one hour, then filtered. The precipitate was washed with ethanol, ligroin and dried to yield the sodium salt of the dye.
  • the sodium salt of the dye was dissolved in 200 ml water with rapid stirring. 6.0 ml concentrated hydrochloric acid was added and a fluffy red precipitate formed. The mixture was filtered and the precipitate was washed with water, methanol, acetone, and ligroin, and dried to yield Dye 1/0.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Claims (10)

1. Produit radiographique comprenant un support de film pouvant transmettre un rayonnement auxquel le produit radiographique est sensible, ayant des faces principales opposées, des couches de colloïde hydrophile perméable à la solution de développement parmi lesquelles se trouvent, appliquées sur chaque face principale opposée, au moins une couche d'émulsion aux halogénures d'argent pouvant répondre au rayonnement électromagnétique dans la partie visible du spectre et au moins une autre couche de colloïde hydrophile interposée entre la couche d'émulsion et le support, un colorant dispersé dans au moins une des couches de colloïde hydrophile interposée pouvant (i) absorber le rayonnement visible auxquel le produit radiographique est sensible pour réduire la perte de netteté due à la diffusion de la lumière au travers du support et (ii) être décoloré dans une solution de développement, caractérisé en ce que ce colorant est, avant le développement, sous forme de particules microcristallines, présent en concentration suffisante pour réduire la perte de netteté due à la diffusion de la lumière au travers du support à moins de 10 pour cent et peut être pratiquement décoloré en moins de 90 secondes pendant le développement.
2. Produit radiographique selon la revendication 1, caractérisé de plus en ce que ce colorant est initialement présent en concentration suffisante pour donner une densité optique d'au moins 1,00 à la longueur d'onde du spectre visible du pic de sensibilité de l'émulsion.
3. Produit radiographique selon la revendication 1 ou 2, caractérisé de plus en ce que ce colorant est un colorant jaune.
4. Produit radiographique selon l'une quelconque des revendications 1 à 3, caractérisé de plus en ce que ce colorant présente une densité optique d'au moins 1,00 dans la région spectrale de 400 à 500 nm.
5. Produit radiographique selon la revendication 1 à 2, caractérisé de plus en ce que ce colorant est un colorant magenta.
6. Produit radiographique selon l'une quelconque des revendications 1, 2, 4 et 5, caractérisé de plus en ce que ce colorant présente une densité optique d'au moins 1,00 dans la région spectrale de 450 à 550 nm.
7. Produit radiographique selon l'une quelconque des revendications 1 à 6, caractérisé de plus en ce que les particules de ce colorant présentent un diamètre moyen de moins de 1 wm.
8. Produit radiographique selon l'une quelconque des revendications 1 à 7, caractérisé de plus en ce qu'au moins une de ces couches de colloïde hydrophile interposée contient un absorbeur d'ultraviolets.
9. Produit radiographique selon l'une quelconque des revendications 1 à 8, caractérisé de plus en ce que ce colorant, quand il est décoloré, donne une densité résiduelle à ce produit radiographique de moins de 0,02.
10. Produit radiographique selon l'une quelconque des revendications 1 à 9, caractérisé de plus en ce que ce colorant peut être pratiquement décoloré jusqu'à ce qu'il ait une densité de moins de 0,01 en moins de 90 secondes dans un révélateur d'hydroquinone-Phénidone@ (1-phényl-3-pyrazolidone) ayant un pH d'au moins 10.
EP19870311289 1986-12-23 1987-12-22 Elément radiographique à effet interimage réduit Expired EP0276566B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US94563486A 1986-12-23 1986-12-23
US945634 1986-12-23
US07/073,256 US4803150A (en) 1986-12-23 1987-07-13 Radiographic element exhibiting reduced crossover
US73256 1987-07-13

Publications (2)

Publication Number Publication Date
EP0276566A1 EP0276566A1 (fr) 1988-08-03
EP0276566B1 true EP0276566B1 (fr) 1990-10-24

Family

ID=26754291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870311289 Expired EP0276566B1 (fr) 1986-12-23 1987-12-22 Elément radiographique à effet interimage réduit

Country Status (4)

Country Link
EP (1) EP0276566B1 (fr)
JP (1) JP2567434B2 (fr)
CA (1) CA1299424C (fr)
DE (1) DE3765770D1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2008456A1 (fr) * 1989-02-23 1990-08-23 Robert E. Dickerson Element radiographique a choix de contrastes
US4997750A (en) * 1989-02-23 1991-03-05 Eastman Kodak Company Radiographic elements with selected speed relationships
EP0384634A3 (fr) * 1989-02-23 1990-11-07 Eastman Kodak Company Assemblages radiographiques écran/film à rendement de détection quantique modifié
EP0391405B1 (fr) * 1989-04-06 1997-01-15 Fuji Photo Film Co., Ltd. Matériau photographique à halogénure d'argent et méthode de traitement
JPH02264936A (ja) * 1989-04-06 1990-10-29 Fuji Photo Film Co Ltd Ｘ線用ハロゲン化銀写真感光材料
DE69024409T2 (de) * 1989-06-05 1996-11-07 Fuji Photo Film Co Ltd Photographisches Röntgenmaterial
USH1105H (en) * 1990-03-29 1992-09-01 Eastman Kodak Company Asymmetrical radiographic elements, assemblies and packages
JP2835638B2 (ja) * 1990-05-08 1998-12-14 富士写真フイルム株式会社 ハロゲン化銀写真感光材料
JPH0414033A (ja) * 1990-05-08 1992-01-20 Fuji Photo Film Co Ltd ハロゲン化銀写真感光材料
US5041364A (en) * 1990-10-01 1991-08-20 Eastman Kodak Company Diagnostic photographic elements exhibiting reduced glare following rapid access processing
EP0555897B1 (fr) * 1992-02-14 1998-05-13 Agfa-Gevaert N.V. Matériau photographique à l'halogénure d'argent sensible aux rayons X avec tonalité et brillance appropriés
EP0586749A1 (fr) * 1992-09-11 1994-03-16 Agfa-Gevaert N.V. Colorants qui absorbent la lumière dans la région de l'extrême rouge et infra-rouge du spectre
EP0587229B1 (fr) * 1992-09-11 2002-05-08 Agfa-Gevaert Element photographique contenant un colorant-filtre pour applications avec traitement rapide
EP0586748A1 (fr) * 1992-09-11 1994-03-16 Agfa-Gevaert N.V. Colorants-filtres pour applications avec traitement rapide
EP0587230B1 (fr) * 1992-09-11 2003-11-26 Agfa-Gevaert Element photographique contenant un colorant-filtre pour applications avec traitement rapide
US5576156A (en) * 1995-05-22 1996-11-19 Eastman Kodak Company Low crossover radiographic elements capable of being rapidly processed
JPH09230540A (ja) * 1996-02-26 1997-09-05 Fuji Photo Film Co Ltd ハロゲン化銀写真感光材料及びそれを用いた画像形成方法
JP2000267227A (ja) 1999-03-18 2000-09-29 Fuji Photo Film Co Ltd ハロゲン化銀カラー写真感光材料および画像形成方法
US7579139B2 (en) 2005-12-26 2009-08-25 Fujifilm Corporation Silver halide color photographic light-sensitive material
DE602007006084D1 (de) 2006-03-10 2010-06-10 Fujifilm Corp Flachdruckplattenvorläufer und Stapel davon
JP2007264031A (ja) 2006-03-27 2007-10-11 Fujifilm Corp ハロゲン化銀カラー写真感光材料

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2119718C3 (de) * 1970-04-24 1980-08-28 Minnesota Mining And Manufacturing Co., Saint Paul, Minn. (V.St.A.) Lichtempfindliches Aufzeichnungsmaterial für radiographische Zwecke
GB1414456A (en) * 1971-11-05 1975-11-19 Agfa Gevaert Combination of photosensitive element suited for use in radiography
JPS4868623A (fr) * 1971-12-21 1973-09-19
US4294916A (en) * 1979-05-22 1981-10-13 Ciba-Geigy Ag Photographic silver halide material containing a dye filter or a dye anti-halation layer
CA1148788A (fr) * 1979-06-29 1983-06-28 Raymond G. Lemahieu Substances photographiques a base d'halogenure d'argent, contenant des colorants disperses a base de merostyryl absorbant la lumiere

Also Published As

Publication number Publication date
CA1299424C (fr) 1992-04-28
JPH01172828A (ja) 1989-07-07
JP2567434B2 (ja) 1996-12-25
EP0276566A1 (fr) 1988-08-03
DE3765770D1 (de) 1990-11-29

Similar Documents

Publication Publication Date Title
US4803150A (en) Radiographic element exhibiting reduced crossover
EP0276566B1 (fr) Elément radiographique à effet interimage réduit
US4900652A (en) Radiographic element
EP0384633B1 (fr) Eléments radiographiques avec des rapports de sensibilité sélectionnés
US4994355A (en) Radiographic elements with selected contrast relationships
US5021327A (en) Radiographic screen/film assemblies with improved detection quantum efficiencies
EP0703494B1 (fr) Matériau photographique à l'halogénure d'argent comprenant du colorant absorbant à l'infrarouge
KR950004964B1 (ko) 사진 화상을 얻는 방법 및 그 엘리먼트
US5344749A (en) Filter dyes for rapid processing applications
US5380634A (en) Filter dyes for rapid processing applications
EP0341958A2 (fr) Matériau photographique à halogénure d'argent
EP0308955A2 (fr) Matériau photographique à l'halogénure d'argent
JP2927489B2 (ja) 選択されたコントラスト関係を有する放射線写真要素
EP0587229B1 (fr) Element photographique contenant un colorant-filtre pour applications avec traitement rapide
EP0587230B1 (fr) Element photographique contenant un colorant-filtre pour applications avec traitement rapide
US4908303A (en) Silver halide photographic materials spectrally sensitized with luminous dye
JP2927488B2 (ja) 改良された光量子検出効率を有する放射線写真スクリーン／フィルム組体
US5213954A (en) White light handleable negative-acting silver halide photographic elements
JPH0329939A (ja) 放射線写真用感光性要素及びｘ―線画像の形成法
US5316901A (en) Negative-acting silver halide photographic elements having extended UV exposure latitude
EP0411819A2 (fr) Elément photographique à l'halogénure d'argent travaillant en négatif manipulable À  la lumière du jour
EP0696757A2 (fr) Film pour la duplication d'images d'argent dans des films radiographiques
JPS61205934A (ja) ハロゲン化銀写真感光材料
EP0586748A1 (fr) Colorants-filtres pour applications avec traitement rapide
JPH01126646A (ja) ハロゲン化銀写真感光材料

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19890203

17Q First examination report despatched

Effective date: 19890926

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB NL

REF Corresponds to:

Ref document number: 3765770

Country of ref document: DE

Date of ref document: 19901129

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960924

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970108

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

BERE Be: lapsed

Owner name: EASTMAN KODAK CY (A NEW JERSEY CORP.)

Effective date: 19971231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980701

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980701

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061106

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20061201

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20061229

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20071221

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP