Abstract: A radiation image storage panel having an air-tightly closed space formed of two rigid sheets and a frame placed between the sheets and a phosphor layer placed in the closed space, in which the frame has four corners in the form of concave arc or concave polygon of obtuse angles keeps its air-tight sealing structure for a long period of time and is resistant to deterioration of the phosphor layer.

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 1 0 ≤ P ≤ 1 × 10 - 11 ⁢ cm 3 ⁡ ( S ⁢   ⁢ TP ) · cm cm 2 · s · P ⁢   ⁢ a .

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 is a layer of parylene.

Abstract: A radiation image storage device composed of a fluorescent sheet which contains a phosphor which absorbs a radiation energy and emits a light of ultraviolet or visible region, and a radiation image storage panel having a fluorescent layer and a radiation image storage layer, in which the fluorescent layer contains a phosphor that absorbs a radiation energy and emits a light of ultraviolet or visible region, and the radiation image storage layer contains a stimulable oxide phosphor that absorbs the light emitted by the phosphors of the fluorescent layer and the fluorescent sheet to store energy of the absorbed light and releases the stored energy in the form of a light upon irradiation with a light of visible or infrared region is favorably employed for a radiation image storing and reproducing method.

Abstract: A radiation image storage panel having a phosphor layer which is composed of a phosphor having a matrix component and an activator component is prepared by the steps of forming on a substrate a lower prismatic crystalline layer composed of the matrix component by vapor deposition; and forming on the lower prismatic crystalline layer an upper prismatic crystalline layer composed of the matrix component and the activator component by vapor deposition.

Abstract: Apparatus for radiographically imaging elongated objects comprising: a vertical main frame; a base mounted on said main frame; a first support on said base for supporting a first cassette containing a first storage phosphor imaging plate; a door hingedly mounted on said base for movement between open and closed positions; said door having a light-tight enclosure for supporting a second cassette containing a second storage phosphor imaging plate removably mounted within a cassette shell; and a first mechanism for removing said cassette shell from said second storage phosphor imaging plate which remains supported within said light-tight enclosure; such that, when said door is in said closed position, said second storage phosphor imaging plate overlaps said first storage phosphor imaging plate, whereby an elongated object can be radigraphically imaged onto said overlapping first and second storage phosphor imaging plates.

Abstract: A radiation image storage panel composed of a substrate and a phosphor film of a stimulable phosphor which is composed of a mother component and an activator element and is formed by vapor deposition, is preferred to have a relationship of a molar ratio of activator element/mother component in an optionally determined one position on the phosphor film and a molar ratio of activator element/mother component in an optionally determined different position on the phosphor film satisfies the condition of 0.1≦Ra/Rb≦10 [Ra means a molar ratio of activator element/mother component in an optionally determined one position of the phosphor film and Rb means a molar ratio of activator element/mother component in an optionally determined different position of the phosphor film].

Abstract: A supported phosphor screen or panel suitable for use in radiation detectors has been described, as well as a method to prepare said screen or panel, comprising a phosphor layer wherein the phosphor layer has a main surface and edges, and further comprises, as an overcoat layer, a moistureproof protective layer, characterized in that the panel comprises a support with a surface larger than the said main surface of said phosphor layer, so that the said phosphor layer leaves a portion of said support free, and said overcoat layer covers at least a part of said portion of said support left free by said phosphor layer.

Abstract: A radiation image storage panel composed of a substrate and a phosphor film of an europium activated cesium bromide phosphor containing an europium element at an atomic ratio in the range of 0.0001 to 0.01 in terms of Eu/Cs and having been formed by vapor deposition shows specifically high sensitivity. The phosphor film is favorably deposited on the substrate by electron beam-evaporation method using plural evaporation sources.

Abstract: A radiographic phosphor panel includes a phosphor layer that transmits actinic radiation in a range that is reflected by a transparent, polymeric multi-layer reflector used as a support. The polymeric multi-layer reflector has numerous alternating layers of at least two different polymeric materials and reflects at least 50% of actinic radiation in the range of wavelengths to which the phosphor is sensitive. The use of this polymeric multi-layer reflector in the radiographic phosphor panel provides increased photographic speed when it is used in imaging assemblies with photosensitive recording materials such as radiographic silver halide films.

Abstract: The invention relates to a method and a device for reading out radiation image information stored on an image medium (12). A scanning unit (10) has a laser (16) for scanning the image medium (12) with a readout light beam (22). The read/processing device (14) functions with two channels so that the luminescent light emitted by the image medium (12) during scanning and also the reflected read-out light are synchronously detected, evaluated and correlated. The digital luminescent light image values are corrected according to the digital reflection light values in order to better obtain the radiation image information.

Abstract: Stimulating rays produced by a line light source are linearly irradiated onto an area of one surface of a stimulable phosphor sheet, on which a radiation image has been stored. The stimulating rays cause the sheet to emit light in proportion to an amount of energy stored thereon during its exposure to radiation. Light, which is emitted from the linear area of the one surface of the sheet exposed to the linear stimulating rays or from a linear area of the other surface corresponding to the linear area of the one surface, is received with a line sensor comprising photoelectric conversion devices arrayed along a length direction of the linear area of the sheet. The sheet is moved with respect to the line light source and the line sensor and in a direction different from the length direction of the linear area of the sheet. A distributed index lens array comprising distributed index lenses arrayed along the length direction of the linear area of the sheet is located between the sheet and the line sensor.

Abstract: An x-ray cassette having increased durability. The x-ray cassette comprises a shell and a storage phosphor assembly. The shell comprises an upper and lower panel, a first and second side member, and a front end member. The first and second side members and front end member join the upper and lower panels to define a cavity having an open end. The storage phosphor assembly comprises a back end member, an insert plate, and an edge insert. The storage phosphor assembly is adapted to be removably contained within the shell such that the back end member closes off the open end of the shell. A first side of the edge insert is affixed to the insert plate. A first end of the edge insert is disposed adjacent the back end member, and a second end of the edge insert comprises at least one recess on the first side.

Abstract: A storage phosphor panel having a storage phosphor layer, characterized in that a focusing layer (8) which comprises a multiplicity of adjacent microlenses (9) is incorporated in said storage phosphor panel and forms an outer surface of said panel.

Abstract: An x-ray cassette having increased durability. The x-ray cassette comprises a shell and a storage phosphor assembly. The shell comprises an upper and lower panel, a first and second side member, and a front end member, with the first and second side members and front end member joining the upper and lower panels to define a cavity having an open end. The storage phosphor assembly comprises an insert plate having a first and second side, a back end member having two ends, and a first and second edge insert. The storage phosphor assembly is adapted to be removably contained within the shell such that the back end member closes off the open end of the shell. The first and second edge inserts are affixed to the first and second sides, respectively.

Abstract: An x-ray cassette having increased durability. The x-ray cassette comprises a shell and a storage phosphor assembly. The shell comprises an upper and lower panel, a first and second side member, and a front end member. The first and second side members and front end member join the upper and lower panels to define a cavity having an open end. The storage phosphor assembly comprises a back end member, an insert plate, and an edge insert. The storage phosphor assembly is adapted to be removably contained within the shell such that the back end member closes off the open end of the shell. A first side of the edge insert is affixed to the insert plate. A first end of the edge insert is disposed adjacent the back end member, and a second end of the edge insert comprises at least one recess on the first side.

Abstract: An arrangement for reading photo-stimulable storage luminescent substances comprises an excitation glass fiber into which light which excites the storage luminescent substance can be fed by means of a light source. Light emitted by the excited storage luminescent substance can be fed into a receiving glass fiber, an end of the excitation glass fiber which is positioned close to the storage luminescent substance being arranged next to an end of the receiving glass fiber which can be positioned close to the storage luminescent substance. The excitation glass fiber (12) has a first numerical aperture and the receiving glass fiber has a second numerical aperture which is large compared with the first numerical aperture, as a result of which the light fed out from the excitation glass fiber is directed straight onto the storage luminescent substance without an optical arrangement and the stimulated light can be captured by the receiving glass fiber without an optical arrangement.

Abstract: A method for preparing a radiation image conversion panel, which comprises the steps of:

Abstract: A stimulable phosphor sheet is formed with a plurality of stimulable phosphor layer regions formed by pressing a stimulable phosphor membrane containing stimulable phosphor and a binder into a plurality of through-holes formed in a plate-like member to form the plurality of stimulable phosphor layer regions at positions corresponding to those of the plurality of through-holes of the plate-like member.

Abstract: In a radiation image recording/read-out apparatus, a stimulable phosphor sheet having a reflective layer which is not longer than 5 &mgr;m in scattering length and is interposed between a stimulable phosphor layer and a support layer is used. Radiation is projected onto the stimulable phosphor sheet from the support layer side, and stimulating light is projected onto the stimulable phosphor sheet from the stimulable phosphor layer side. Stimulated emission, emitted from the stimulable phosphor layer upon exposure to the stimulating light, is detected from the stimulable phosphor layer side.

Abstract: A stimulable phosphor sheet includes a stimulable phosphor layer in contact with a protective layer which is rigid and transparent. Stimulating light is projected onto the stimulable phosphor sheet from the protective layer side, stimulated emission emitted from the stimulable phosphor layer upon exposure to the stimulating light is detected by imaging the stimulated emission on a line sensor by an imaging lens from the protective layer side while moving the stimulable phosphor sheet relatively to the line sensor in a direction intersecting the direction in which the line sensor extends.

Abstract: A preparation process of a particulate rare earth activated alkaline earth metal fluorohalide stimulable phosphor represented by formula (1) is disclosed, wherein precursor particles of the stimulable phosphor, prepared in the liquid phase process are covered with fine particles of at least two kinds of metal oxides and then subjected to calcination. A radiation image conversion panel containing the stimulable phosphor particles is also disclosed.

Abstract: A radiation image conversion panel superior in luminance and sharpness is disclosed, comprising a support having thereon a stimulable phosphor layer containing a stimulable phosphor and a protective layer, wherein the stimulable phosphor layer exhibits a density of not less than 3.00 g/cm3, the stimulable phosphor layer being provided between the support and the protective layer.

Abstract: A radiation image storage panel comprises a first rigid layer, and a stimulable phosphor layer, which is overlaid on the first rigid layer. A filler layer is located by adhesion on the side of the first rigid layer, on which side the stimulable phosphor layer is overlaid, or a filler layer is located by adhesion on the side opposite to the side of the first rigid layer, on which side the stimulable phosphor layer is overlaid. A second rigid layer is overlaid by adhesion on the filler layer. The density of the filler layer is lower than the density of the first rigid layer and the density of the second rigid layer. The radiation image storage panel exhibits little deflection by gravity and is capable of yielding a reproduced radiation image having good image quality.

Abstract: A process for recording a radiation image on a radiation image storage panel containing stimulable phosphor particles and then reproducing the radiation image by the double side reading system is favorably performed employing a radiation image storage panel containing stimulable phosphor particles in which the stimulable phosphor particles vary in their mean particle sizes in the depth direction of the storage panel in such manner that the mean particle size on one surface side is smaller than the mean particle size on the other surface side, preferably under the condition that stimulating rays are applied onto the storage panel on the surface side having the phosphor particles of the smaller mean particle size to excite the phosphor particles in the storage panel.

Abstract: A radiation image detector wherein a photostimulable phosphor screen, a source of stimulating light and an array of transducer elements are enclosed within an enclosure that is hermetically closed against humidity. In one embodiment the enclosure is flushed with an inert gas such as N2 gas.

Abstract: In an energetic-beam detection apparatus having a selenium detector which includes a substrate and an energetic-beam absorber being formed on the substrate and containing selenium, a temperature detecting unit detects a temperature of the selenium detector, and a temperature control unit controls the temperature of the selenium detector so that the temperature is maintained in a predetermined range when the selenium detector is in operation. Alternatively, when the temperature of the selenium detector is outside a predetermined range, an operation suppressing unit suppresses the operation of the selenium detector, or a notification unit notifies a user of the deviation of the temperature of the selenium detector from the predetermined range.

Abstract: In a radiation image storage panel composed of a stimulable phosphor layer which gives stimulated emission upon irradiation with stimulating rays and a protective film provided thereon, and optionally further a back protective film, a transparent support film, and an undercoating layer, the protective film contains electroconductive acicular fine particles, has a surface electric resistivity of 1014&OHgr; or less, and shows a transmittance of 70% or more at a peak wavelength of the stimulated emission.

Abstract: A radiation image storage panel composed of a phosphor film which has cracks extending in its depth direction and is formed by vapor-accumulating method shows particularly good image-forming characteristics having a good balance between its sensitivity and its image sharpness when the phosphor film has a thickness of 300 to 700 &mgr;m and has a relative density of 85 to 97%.

Abstract: A storage phosphor based computed radiography system apparatus for aligning a test target with storage phosphor assemblies of different sizes comprising; a rectangular tray for selectively holding at least a first storage phosphor assembly having a first rectangular size and a second storage phosphor assembly having a second rectangular size smaller than said first rectangular size; said tray having first and second nested receptacles for selectively holding said first or said second storage phosphor assembly and wherein said first receptacle is sized to hold a test target of said first rectangular size in alignment with a held storage phosphor assembly.

Abstract: A non-powered composite luminous panel including two plates of light transmissive material and the interlayer of a luminescent material provided between the two plates. The luminescent material includes a light transmissive resinous material and contains a suspension of luminescent particles, preferably of the long acting emitting type.

Abstract: A radiation image storage panel comprises a stimulable phosphor layer, which contains a stimulable phosphor, and a light reflecting layer, which contains a light reflecting substance and is overlaid on one surface of the stimulable phosphor layer. A scattering length of the light reflecting layer with respect to light having wavelengths falling within a stimulation wavelength range for the stimulable phosphor is at most 5 &mgr;m. The light reflecting substance may be a white pigment. The light reflecting substance may have a bulk density of at most 1 mg/cm3 or a BET specific surface area of at least 1.5 m2/g. The light reflecting substance may have a mean particle size falling within the range of 1/4 of the stimulation wavelengths to two times as large as the stimulation wavelengths. The radiation image storage panel is capable of emitting light having a high intensity and furnishing a radiation image having good image quality with a high sharpness.

Abstract: A storage phosphor cassette for use in recording radiographic images of elongated objects comprising: first and second storage phosphor plates having first and second length dimensions; a shell having first and second opposite open ends; a first assembly for detachably mounting said first storage phosphor plate in said shell from said first open end; and a second assembly for detachably mounting said second storage phosphor plate in said shell from said second open end, wherein said first and second storage phosphor plates are mounted in said shell such that they form a substantially continuous storage phosphor composite for recording an elongated radiographic image; and an elongated ruler located on the inside or outside of said cassette, said ruler being x-ray translucent/opaque to produce an image of said ruler in said first and second storage phosphor plates.

Abstract: A radiation image read-out apparatus including a lens array and a line sensor for reading an image recorded on a stimulable phosphor sheet provides a read-out image of high quality which is free from a spurious pattern due to non-aperture regions of the lens array. A first memory stores an image signal representing the image recorded on the stimulable phosphor sheet. Spurious pattern signal calculating means calculates a spurious pattern signal based on positions of the non-aperture regions on the lens array. The spurious pattern signal is stored in a second memory. Image modification means reads the image signal and the spurious pattern signal from the first and second memories to calculate a processed image signal free from any spurious pattern signal on a pixel-by-pixel basis. The spurious pattern signal may instead be obtained by causing the apparatus to read a uniform radiation image recorded on the stimulable phosphor sheet.

Abstract: A phosphor powder for producing a high resolution phosphor screen and a phosphor screen are provided. The phosphor screen comprises a substrate, an infrared-absorbing layer, and a phosphor layer coated on the infrared-absorbing layer, wherein the phosphor layer comprises a phosphor powder in which a substantial amount of particles in the powder have a particle size as measured in the longest dimension of greater than 0 and less than about 5 microns. The phosphor screen may also comprise a black, infrared-absorbing substrate with the phosphor layer coated on the substrate. The phosphor powder is formed by preparing a phosphor composition, sintering the composition to form ingots, grinding the ingots to form a powder wherein a substantial amount of particles in the powder have a particle size of greater than 0 and less than about 5 microns, reactivating the powder in an inert atmosphere to a temperature of from about 500° C. to about 550° C.

Abstract: A storage phosphor cassette for use in recording radiographic images of elongated objects. The cassette includes: first and second storage phosphor plates having first and second length dimensions, a shell having first and second opposite open ends; a first assembly for detachably mounting said first storage phosphor plate in said shell from said first open end; and a second assembly for detachably mounting said second storage phosphor plate in said shell from said second open end, wherein said first and second storage phosphor plates are mounted in said shell such that they form a substantially continuous storage phosphor composite for recording an elongated radiographic image.

Abstract: In a radiation image storage panel composed of a support sheet and a phosphor layer formed on a surface of the support sheet by vapor-accumulating method, the phosphor layer is composed of prismatic crystals of phosphor aligned in the same direction, and each of the crystals has a convex surface at one end. The radiation image storage panel is favorably employed in combination with a line sensor in a radiation image recording and reproducing method.

Abstract: Image storage assemblies comprise thin metal screens adjacent storage phosphor screens. The thin metal screen is from about 0.01 to about 0.75 mm in thickness when composed of copper and from about 0.05 to about 0.4 mm when composed of lead. These image storage assemblies can be used in portal imaging whereby both imaging and stimulating radiation are directed through the thin metal screens before the radiation reaches the storage phosphor screens.

Abstract: Image storage assemblies comprise thin metal screens adjacent phosphor storage screens. The thin metal screen is from about 0.01 to about 0.75 mm in thickness when composed of copper and from about 0.05 to about 0.4 mm when composed of lead. These image storage assemblies can be used in portal imaging whereby imaging radiation is directed through the thin metal screens before the phosphor storage screens. Stimulating radiation can then be directed to the phosphor storage screen before it reaches the thin metal screen.

Abstract: The instant invention teaches a method of preparing a luminescent detecting material for use in UV dosimetry which utilizes phototransferred luminescence. The detecting material has a set of shallow dosimetry traps for trapping electronic charge carriers, which are thermally released upon heating to a first temperature, and a set of deep traps for trapping electronic charge carriers, which charge carriers are released upon heating to a second temperature. The detecting material is prepared by irradiating the detecting material to fill the shallow and deep traps with charge carriers, heating the material to release charge carriers from the shallow traps, and then cooling the material. When the detecting material is subsequently exposed to ultraviolet light a proportion of charge carriers will be released from the deep traps to be retrapped in the shallow traps, thereby allowing for the measurement of phototransferred luminescence by thermal or optical stimulation.

Abstract: A storage phosphor sheet is conveyed in a conveying direction in which test pieces are conveyed by a conveyor unit, the storage phosphor sheet being continuous in the conveying direction and also being greater in width than the test piece in a direction perpendicular to the conveying direction. The storage phosphor sheet being supplied from a roll of phosphor sheet is superposed by a press roller on the test pieces being conveyed. The storage phosphor sheet is cut by a cutter in order to separate the superposed test piece and storage phosphor sheet from the storage phosphor sheet.

Abstract: A radiation image conversion panel comprising, (i) a phosphor sheet which contains a support having thereon an stimulating light absorbing layer (A) being colored to absorb the stimulating light, and a stimulable phosphor layer in the order;and (ii) a protecting layer which covers the stimulable phosphor layer of the phosphor sheet, wherein the protective layer comprises a stimulating light absorbing layer (B) being colored to absorb the stimulating light, and the layers (A) and (B) each have a smaller absorbance at a peak wavelength of a stimulated emission than an absorbance at a peak wavelength of the stimulating light, and a thickness of the layer (A) is larger than a thickness of the layer (B).

Abstract: A radiation image conversion panel comprising a phosphor sheet having a support and a stimulable phosphor layer provided on the support and a protective film covering the stimulable phosphor layer, wherein a transmittance of the protective film for stimulating light is not larger than 97% and a haze ration of the protective film is within the range of 5% to 60%.

Abstract: A method for recording and reproducing a radiation image including the steps of (1) causing a radiation image storage panel containing a photostimulable phosphor to absorb penetrating radiation having passed through an object or having been radiated from an object, (2) exposing the image storage panel to stimulating rays to release the radiation energy stored therein as light emission and (3) detecting the emitted light, wherein the stimulating rays are emitted by an electroliuminescent element.

Abstract: A stimulable phosphor sheet is prepared by applying an electron beam to a stimulable phosphor or its source in a vacuum to vaporize a phosphor or its source and depositing the vaporized phosphor or source on the support, under the condition that the electron beam is applied to the stimulable phosphor or source at an accelerating voltage of 1.5 kV to 5.0 kV. The stimulable phosphor or its source is preferably in the form of a solid having a relative density of 80% to 98%.

Abstract: A stimulable phosphor sheet is formed by laminating two substantially identical transparent protective base sheets on either side of a stimulable phosphor layer. By this construction, said sheet requires no distinction of front and back surfaces, and a problem of confusing the front and back surfaces can be eliminated.

Abstract: A stimulable phosphor sheet for a radiation image recording and reproducing method comprising the steps of recording a radiation image as a latent image, irradiating the latent image with stimulating rays to release stimulated emission, and electrically processing the emission to reproduce the radiation image, is preferably composed of a stimulable phosphor-containing grid partition that contains a stimulable phosphor, a UV or visible light-emitting phosphor, or a reflective material and two-dimensionally divides the phosphor sheet on its plane to give plural small rectangular sections, and stimulable phosphor-incorporated areas which are rectangularly sectioned with the grid partition and which have a reflectance at the wavelength of the stimulating rays which differs from that of the grid partition.

Abstract: An europium activated cesium bromide phosphor having the formula of CsBr:xEu [0<x≦0.2], in which a relationship between an emission intensity (IE) of Eu2+ and a coloring intensity (IF) at F (Br−) center satisfies the condition of 0.2≦IExIF, and/or in which a ratio of Eu2+ to Eu3+ contained in the phosphor in terms of emission intensity satisfies the condition of 5×10−5≦Eu3+/Eu2+≦0.1 gives an increased stimulated emission amount and is favorably employed for producing a radiation image storage sheet.

Abstract: A stimulable phosphor sheet for a radiation image recording and reproducing method comprising the steps of recording a radiation image as a latent image, irradiating the latent image with stimulating rays to release stimulated emission, and electrically processing the emission to reproduce the radiation image, has partitions that divide the phosphor sheet on its plane to give plural sections, and stimulable phosphor-incorporated areas in the sections, wherein the phosphor-incorporated areas have a light-scattering length of 20 to 100 &mgr;m and a light-absorption length of 1,000 &mgr;m or longer, while the partitions have a light-scattering length of 0.05 to 20 &mgr;m and a light-absorption length of 1,000 &mgr;m or longer, under the condition that a ratio of the light-scattering length of the phosphor-incorporated areas to that of the partitions is 3.0 or more.

Abstract: Disclosed is an apparatus for detecting near-visible frequency light comprising a sensor which includes a near-visible to visible light conversion phosphor defining an active area and a covering having a thickness, the covering adapted to substantially protect the phosphor from degradation. The phosphor extends to within about a first distance of a flush portion of a first edge, the first distance corresponding approximately to the thickness of the covering. In an alternative embodiment, the active area comprises an aperture.