Abstract: A scintillator includes CsBrxI(1-x) doped with Europium (CsBrxI(1-x):Eu) wherein x<0.5, and is obtained by annealing CsBrxI(1-x):Eu material at a temperature from 50° C. to 280° C. The EPR spectrum of the obtained scintillator measured at room temperature at a frequency of 34 GHz shows a maximum signal height at a magnetic field of 1200 mT, and the signal height at 1090 mT and 1140 mT does not exceed 40%, wherein the normalized signal height percentage at 1200 mT is calculated to be 100%. The scintillator is useful in a high energy radiation detection and radiography imaging apparatus.

Abstract: A radiographic flat panel detector includes a layer configuration in the order given: a) a radiation transparent substrate; and b) a scintillator layer applied by vapor deposition on the radiation transparent substrate; and c) an imaging array between the scintillator layer and a second substrate, characterized in that the radiation transparent substrate has on a side a layer including magnetisable particles and a method for producing the radiographic flat panel detector.

Abstract: Method of eliminating the effect of afterglow on a radiation image read out of a photostimulable phosphor screen. For each pixel the amount of afterglow generated by previously scanned pixels in the same line of pixels is determined and subtracted from the digital signal representation of that pixel.

Abstract: A computed radiography system comprises a radiation detecting system wherein an image is formed by the steps of (1) exposing an object to radiation; (2) forming a first digitized image directly captured from said radiation by a detector; (3) storing said digitized image from said radiation on an intermediate medium; (4) forming a latent image originating from the same radiation, as an image stored in a photostimulable phosphor layer, and (5) retrieving said directly captured digitized image and superposing it onto a digitized image originating from said latent image in said photostimulable phosphor layer after photostimulation of said phosphor layer with radiation having a lower energy than the said exposure radiation.

Abstract: Method of eliminating the effect of afterglow on a radiation image read out of a photostimulable phosphor screen. For each pixel the amount of afterglow generated by previously scanned pixels in the same line of pixels is determined and subtracted from the digital signal representation of that pixel.

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: In a method of reading a radiation image, stored in a CsBr:Eu type binderless needle-shaped photostimulable or storage phosphor screen after X-ray exposure of said screen, said method comprises the steps of: (1) erasing thermally stimulable energy by exposing said screen to infrared radiation in the wavelength range from 1000 nm to 1550 nm; (2) stimulating said phosphor screen by means of stimulating radiation in the range from 550 to 850 nm; (3) detecting light emitted by the phosphor screen upon stimulation and converting the detected light into a signal representation of said radiation image; (4) erasing said phosphor screen by exposing it to erasing light in the wavelength range of 300 nm to 1500 nm.

Abstract: In a method of reading out energy stored in a CsBr:Eu stimulable phosphor plate, having been exposed to high energy radiation, said method is performed in two steps: a first read-out step while irradiating said phosphor plate with stimulating energy from an infrared radiation stimulation source, followed by a second read-out step, wherein said second read-out step proceeds while providing stimulation radiation having a higher energy than stimulation radiation energy provided during said first read-out step.

Abstract: In a method of manufacturing a radiation image storage phosphor plate, comprising in its phosphor layer a storage phosphor of the type having an alkali metal halide salt as a main component and a lanthanide as a dopant, the plate after having been manufactured is uniformly exposed, i.e., exposed with a constant intensity and with a homogeneous energy distribution over its whole surface area, in order to absorb an X-ray dose in the range from 1 to 10 Gy.

Abstract: The present invention provides an assembly comprising two plates or covers, one of which being an outermost plate or cover, and both, at least in part having a perforation pattern over a surface area covering an open side of a crucible having a bottom and surrounding side walls containing raw materials, wherein said outermost cover is mounted at a distance farther from the said crucible than said cover covering said open side of a crucible, and wherein both covers are mounted versus each other, so that, when viewed through an axis in a direction perpendicular to the bottom of the crucible from a distance to said outermost cover of at least 10 times the distance between said two plates or covers, its contents cannot be observed as their perforations and the crucible are never forming one line, perpendicular to the plane formed by said bottom.

Abstract: A device comprises at least one organophosphonium transition metal dye or is provided with a filter, comprising at least one organophosphonium transition metal dye, wherein, in a particular embodiment said device is selected from the group consisting of a scanner, a digitizer, a display and a photographic device.

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: A system has been described for reading out stimulable phosphor screens, plates or panels, whether or not differing from each other in phosphor composition or phosphor layer arrangement, after exposing said screens to X-rays. Said system comprises at least one source of stimulating radiation, an array of transducer elements arranged for detecting light emitted upon stimulation and for converting said light into a signal representation of said image. Said system further comprises filtering means for preventing light, emitted by said source of stimulation light, from being detected by said transducer elements, wherein said filtering means transmits light with a high transmission efficiency for emitted blue light upon stimulation and low transmission for radiation from the stimulating laser source.

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: Needle-shaped CsBr:Eu2+ storage phosphor crystal particles in form of a cylinder suitable for use in flat storage phosphor panels have been provided, wherein said particles have an average cross-section in the range from 1 ?m up to 30 ?m and an average length, measured along the casing of said cylinder, in the range from 100 ?m up to 1000 ?m.

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 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: In a storage phosphor sheet, plate or panel, comprising a needle-shaped storage or photostimulable phosphor, said needle-shaped phosphor comprising a host or matrix compound and a dopant or activator compound or element in an amount of less than 0.01 mole % versus said host or matrix compound, said needle-shaped phosphor further comprises, as inclusions or precipitates, particles having a size in the range from 10?3 ?m up to 10 ?m, wherein said particles are present as ferroelectric particles, providing said panel with ferro-electric properties.

Abstract: A method of preparing a stimulable phosphor layer comprising a phosphor composed of a host or matrix compound and a dopant or activator compound or element wherein a precipitate or inclusion having a size in the range from 10?3 ?m up to 10 ?m is present in said matrix compound, proceeds by the steps of (1) providing one or more crucibles containing precursor compounds for said host, said dopant and said precipitate, by increasing the temperature of said crucible(s) up to a temperature provoking evaporation of all of said precursor compounds as a vaporized latent phosphor cloud, (2) depositing said vaporized latent phosphor cloud in form of a layer onto a temperature controlled substrate, (3) followed by cooling said substrate, and (4) further annealing said phosphor layer at a temperature in the range from 35° C. up to 200° C.

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.