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 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: Imaging assemblies comprise thin metal screens adjacent fluorescent intensifying screens. Such assemblies can be included as part of radiographic imaging assemblies in which a radiographic film is positioned behind the metal and fluorescent intensifying screens. The 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 0.40 mm when composed of lead. Photospeed and other imaging characteristics are not diminished with the use of these relatively thin metal screens.

Abstract: A method of forming a composite image from first and second digital images formed by recording first and second contiguous segments of a larger radiographic image in first and second overlapping storage phosphor members, exposed to a source of X-rays wherein the image content in the overlapped region is the same in both images and the end edge of the first member is present both on the first image and as a shadow edge in the second image, the method comprising: correcting for geometric distortion in the first and second digital images, determining any rotational displacement and any vertical displacement between the first and second images by matching the first member end edge in the first image to its shadow in the second image; correcting for image orientation based on any said rotational displacement; determining any horizontal displacement between the first and second images by correlating the image content in the overlapped region of the first and second images; and stitching said first and second images

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: 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: 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: A phantom for use in measuring parameters in a digital radiography image system comprising a substantially rectangular member of an x-ray attenuating material; a first rectangular array of landmarks associated with the member for use in geometry measurements; a set of regions associated with the central position of the member for exposure linearity and accuracy measurement and a set of sharp angular edges part of one of the regions for modulation transfer function measurements.

Abstract: A radiographic storage panel includes a storage phosphor layer disposed on a unique support that comprises two or more separate flexible substrates that are laminated or adhered together.

Abstract: Portal radiographic imaging can be carried out using any suitable imaging equipment because of a modification to the imaging assembly to give it more flexibility for various imaging conditions. The imaging assembly includes a radiographic film, and at least one fluorescent intensifying screen. Disposed between the film and screen is a filter that attenuates the light emitted from the intensifying screen during exposure of the film.

Abstract: An imaging system with an imaging assemblage including a prompt phosphor layer for converting an ionizing radiation image into a light image, and a transparent layer supporting the phosphor layer; wherein the light image is transmitted through the transparent layer; an electronic camera for converting the light image into an electronic image; and a light image transmission system between the imaging assemblage and the electronic camera for transmitting the light image to the electronic camera.

Abstract: A light weight x-ray cassette formed from Hylite which is an metal/polymer/metal material. The cassette comprises: a front panel and a back panel formed from the Hylite composite material with the front and the back panels being operatively hinged together by a hinging element attached to the panels so as to form a cavity between the panels; an x-ray film contained within the cavity between the first panel and the second panel; at least one intensifying screen held in contact with the x-ray film; and a latching element to open and close the cassette.

Abstract: An assemblage useful for autoradiography comprising, in order, a sample layer containing a radioactively labeled biological sample in contact with a phosphor layer, a film layer and a reflector layer. The phosphor layer is preferably a gadolinium oxysulfide containing layer and the film is preferably a photographic film containing a tabular grain emulsion.

Abstract: An X-ray imaging assembly is disclosed comprised of (I) a front and back pair of intensifying screens, (II) a radiographic element mounted between the intensifying screens, and (III) a collimating grid The front screen being chosen to exhibit modulation transfer factors greater than those of reference curve A in FIG. 2 . The radiographic element is comprised of a transparent film support, a front silver halide emulsion layer unit coated on the support and located adjacent the front intensifying screen, a back silver halide emulsion layer unit coated on the support and located adjacent the back intensifying screen, and means for reducing crossover to less than 10 percent. The X-ray collimating grid, located to receive X-radiation prior to the front screen, is comprised of an X-ray opaque material forming an array of at least 85 X-ray transmission apertures per inch providing at least 50 percent open area.

Abstract: A method of making a grid for x-ray radiography including the steps of forming grid patterns of x-ray opaque material on a plurality of sheets of x-ray transparent material, aligning the sheets in a stack, and bonding the sheets together to form a lightweight stacked grid.

Abstract: An electrochemical cell comprising a lithium anode, a cathode and an electrolyte having a conductivity, in reciprocal ohms per cm (mmho/cm), of at least 3.5 and comprising a lithium salt and 1,2-dimethoxypropane is disclosed.

Abstract: A polymer blend comprising cellulose nitrate and a polymer characterized in that (a) the polymer comprises at least 70 weight percent of polymerized recurring units derived from a hydrophobic monomer selected from the group consisting of styrene, alkyl acrylates and alkyl methacrylates and 10 to 24 weight percent of polymerized recurring units derived from an acid monomer selected from the group consisting of methacrylic acid and acrylic acid; and (b) the blend comprises from 20 to 70 weight percent of cellulose nitrate and from 8 to 15 weight percent of the polymerized recurring acid monomer and is useful as a protective layer in radiation-sensitive elements.

Abstract: A polymer blend comprising cellulose nitrate and a polymer characterized in that (a) the polymer comprises at least 70 weight percent of polymerized recurring units derived from a hydrophobic monomer selected from the group consisting of styrene, alkyl acrylates and alkyl methacrylates and 10 to 24 weight percent of polymerized recurring units derived from an acid monomer selected from the group consisting of methacrylic acid and acrylic acid; and (b) the blend comprises from 20 to 70 weight percent of cellulose nitrate and from 8 to 15 weight percent of the polymerized recurring acid monomer and is useful as a protective layer in radiation-sensitive elements.

Abstract: Novel polymers having the structure--A).sub.x, --B).sub.y and --C).sub.z ;whereinA represents a polymerized acrylonitrile monomer;B represents a polymerized hydrophobic ethylenically unsaturated monomer;C represents a polymerized ionically charged vinyl monomer;x is from 10 to 90 weight percent;y is from 5 to 40 weight percent except that when B is a vinyl halide monomer, y is 10 to 89.9 weight percent; andz is from 0.1 to 10 weight percentThe polymers are useful in forming protective over-coats for photographic elements.

Abstract: Polymer compositions which have a low coefficient of friction are disclosed. The polymer compositions comprise a blend of at least 80 percent by weight of a solid of film-forming polymer and at least 0.35 percent by weight of a crosslinked silicone polycarbinol. The described composition retains its low coefficient of friction even after being exposed to hydrocarbon solvents during a cleaning process. The described compositions are particularly useful in forming protective layers for elements, particularly photographic elements.