Abstract: Stimulable phosphor screens, sheets or panels having alkali metal halide storage phosphors have been disclosed, said phosphors showing emission of red light, after stimulation with an ultraviolet radiation source having a radiation emission maximum of 365 nm, wherein an intensity of red light is not higher than 10% of the blue light emission intensity, and wherein both emission intensities having been measured after stimulation of the said storage phosphors in the phosphor layer of the panel, having stored energy from radiation in the wavelength range shorter than 350 nm.

Abstract: A system has been described for reading out a plurality of stimulable phosphor screens, plates or panels, after exposing said screens to X-rays having an energy in the range from 25 up to 150 kVp, the screens being selected from the group consisting of binder containing powder screens and binderless, crystalline or amorphous phosphor layer screens; wherein said phosphors are divalent europium activated alkali halide type phosphors wherein said halide is at least one of bromide or a combination of bromide with at least one of chloride and iodide, or divalent europium activated alkaline earth metal halide phosphors, wherein said halide is at least one of fluoride, chloride, bromide and iodide or a combination thereof, and wherein said screens are consecutively subjected to following steps of stimulating said phosphor screens by means of stimulation energy; detecting stimulated emission energy, emitted by the phosphor screen upon stimulation; converting detected energy into a signal representation of said radiat

Abstract: A Eu-doped CsBr-type storage phosphor screen or panel has been disclosed, providing ratios of ultraviolet luminescence intensities of at least 10/9 after having been exposed to radiation having a wavelength in the range from 150 to 400 nm, measured at same sites without and with pretreatment exposure of said storage phosphor screen or panel with short ultraviolet radiation in the range from 150 to 300 nm and having an energy of 10 mJ/mm2, as well as a method of producing a stimulable phosphor screen or panel, characterized in that during or after at least one of the manufacturing steps a radiation exposure treatment is given with radiation sources emitting short ultraviolet radiation in the range from 150 to 300 nm with an energy of at least 10 mJ/mm2.

Abstract: A phosphor panel with a protective coating divided in at least two layers: a layer A, being closest to said phosphor layer and a layer B farther away from said phosphor layer wherein the layer A has a lower water vapour permeability coefficient than the layer B. Layer A has a water vapour permeability coefficient, P, so that 0 ? P ? 1 × 10 - 11 ? cm 3 ? ( STP ) · cm cm 2 · s · Pa .

Abstract: The invention relates to a system having a scanner and a memory layer. The memory layer comprises particles for storing X-ray information items, that can be excited by a stimulating radiation to emit an emission radiation corresponding to one of the X-ray information items and that are embedded in a medium and are distributed over the entire thickness of the memory layer. The scanner comprises an irradiating device for irradiating a linear region on the memory layer and a detector for the positionally resolved detection of emission radiation emitted by the memory layer along the linear region. To increase the sharpness of the X-ray information items to be detected with low losses in the intensity of the emission radiation, the medium can at least partially absorb components, directed both perpendicularly and parallel to the plane of the memory layer, of the emission radiation emitted by the individual particles.

Abstract: As a rare earth activated lutetium oxyorthosilicate phosphor with an enhanced X-ray absorption coefficient for direct X-rays, a scintillating phosphor according to the formula Lu2O5Si:xM, wherein M is selected from the group of rare earth elements consisting of Eu, Pr and Sm and wherein x is from 0.0001 to 0.2, has been shown to be preferred as said phosphor promptly emits red light, which makes it particularly suitable for use as a scintillator material in a device for direct-radiography (DR).

Abstract: A phosphor or scintillator sheet, web or panel is provided, wherein a phosphor or a scintillator layer is coated onto a flexible substrate, the stiffness of which is lowered by presence of pits or grooves onto said substrate, preferably applied by a technique selected from the group consisting of mechanical, chemical, (laser) optical, electrical and photo-etching techniques.

Abstract: As a europium-activated rare earth oxysulfide phosphor with an enhanced X-ray absorption coefficient for direct-X-rays, a lutetium oxysulfide phosphor has been shown to be preferred, wherein said phosphor further prompt emits red light, which makes it particularly suitable for use as a scintillator material in a device for direct-radiography.

Abstract: An image storage screen or panel, suitable for use in applications related with computed radiography comprises a binderless needle-shaped stimulable (storage) CsBr:Eu phosphor and a substrate, wherein said substrate has a surface roughness of less than 2 &mgr;m and a reflectivity of more than 80%.

Abstract: A binderless storage phosphor screen comprises a vacuum deposited CsBr:Eu phosphor layer on a support, wherein the support includes a layer of amorphous carbon and optionally one or more auxilliary layers.

Abstract: A phosphor panel with a protective coating divided in at least two layers: a layer A, being closest to said phosphor layer and a layer B farther away from said phosphor layer wherein the layer A has a lower water vapor permeability coefficient than the layer B. Layer A has a water vapor permeability coefficient, P, so that 0 ≤ P ≤ 1 × 10 - 11 ⁢ cm 3 ⁡ ( STP ) · cm cm 2 · s · P ⁢   ⁢ a .

Abstract: A binderless stimulable phosphor screen is provided, comprising a vapor deposited phosphor layer on a support, wherein between the support and the phosphor layer a ceramic layer is present, wherein said ceramic layer preferably comprises a mixture of pigments so that the optical density of the phosphor screen is higher for the stimulating wavelength than for the stimulated emission wavelength of the vapor deposited phosphor.

Abstract: In a method for coating a phosphor or a scintillator layer onto a flexible substrate, within a sealed zone maintained under vacuum conditions, by the step of vapor deposition, said phosphor or scintillator layer is, continuously or discontinuously, deposited onto said substrate, and said substrate is deformed at least before, during or after said step of vapor deposition, in order to provide the manufacturer, by a process of exceptionnally high yield, with large deposited phosphor or a scintillator sheets having constant speed and image quality properties, further offering availablity of all formats as desired for screens, plates or panels ready-for-use in a scanning apparatus in computed radiography, screen/film radiography and direct radiography.

Abstract: A CsX:Eu phosphor produced by heating a cesium halide with a Europium compound containing one or more halides selected from the group consisting of F, Cl, Br and I. Preferably the Europium compound is selected from the group consisting of EuX′2, and EuX′3 and EuX′, X′ being one or more halides selected from the group consisting of F, Cl, Br and I. The invention also includes novel phosphors having properties inherent to the manufacturing process as well as other phosphors containing a mixture of Br and Cl in the cesium halide, europium doped phosphor. A method for preparing a binderless phosphor screen using these phosphors and a method for recording and reproducing an X-ray image using such screens are also disclosed.

Abstract: A method and apparatus for correcting a signal representation of a radiation image of an object wherein correction by means of correction values is performed simultaneously with image read out.

Abstract: A CsX:Eu phosphor produced by heating a cesium halide with a Europium compound containing one or more halides selected from the group consisting of F, Cl, Br and I. Preferably the Europium compound is selected from the group consisting of EuX′2, EuX′3 and EuOX′, X′ being one or more halides selected from the group consisting of F, Cl, Br and I. The invention also includes novel phosphors having properties inherent to the manufacturing process as well as other phosphors containing a mixture of Br and Cl in the cesium halide, europium doped phosphor.

Abstract: An optical memory plate particularly suitable for identification purposes or protection against forgery and counterfeiting radiation provides inscription of data and read-out of thus stored inscription data, comprises a europium doped alkali metal halide storage phosphor layer, and, more preferably, a stimulable CsBr:Eu phosphor substantially free of alkaline earth metals.

Abstract: An X-ray cassette for computed radiography is provided, said cassette having a form of a hollow box comprising top and bottom, front and rear, and lateral sides, said top and bottom sides having width dimensions, between said lateral sides, and depth dimensions, between said front and rear sides, which are substantially greater than the dimensions of said front, rear and lateral sides, between said top and bottom sides, wherein said bottom side and said front, rear and lateral sides have a higher material stiffness than the top side and wherein said top side is a deformable carrier or support material, supporting a storage or stimulable phosphor sheet layer.

Abstract: An apparatus and a method in which the apparatus is used in order to provide ability to test and ascertain the authenticity an item differing from a radiation image storage phosphor panel, characterized in that said item is applied onto or into at least part thereof, with storage phosphor particles, wherein said method comprises the steps of checking for presence of a selected storage phosphor onto or into said item, by first irradiating the item with electromagnetic radiation having a wavelength shorter than the wavelength emitted by the stimulable phosphor, stimulating the phosphor with electromagnetic radiation having a wavelength longer than the wavelength emitted by the phosphor, detecting the stimulated emission of the phosphor and transforming the light signal into a visual and/or an audio signal.

Abstract: A CsBr:Eu phosphor showing a narrow emission spectrum upon UV-excitation and panels including such a phosphor are disclosed. Also methods for preparing such a phosphor have been described.