Abstract: Device and method of treatment of light obtained from X-rays, comprising a means of filtering the light with a cutoff frequency such that a first part of the spectrum of the light emitted by a light emitter is preserved, the first part of the spectrum being independent of temperature, and a second part of the light spectrum is stopped, the second part of the spectrum presenting a shift dependent on temperature. The invention also concerns an imaging cassette, a dose measuring module and a radiology apparatus.

Abstract: According to the invention there is provided a relockable cartridge for photosensitive media, comprising (a) photo-inert and optically opaque media-receiving tray having a media access opening; (b) flexible, photo-inert and optically opaque cover for the media access opening; the cartridge including an openable and relockable magnetic seal between at least portions of the cover and tray, characterized in that one part of the magnetic seal is located on upperlips or projective guides of said tray and the other part of the magnetic seal consists of or is fixed to said cover.

Abstract: An radiographic imaging system for making a radiograph by a radiography apparatus using a photographic combination of a silver halide photographic material having light sensitive layers on both sides of the support and an intensifying screen is disclosed, wherein the photographic material exhibits a cross-over of not more than 15%, a specified point gamma value within the specified density range on the characteristic curve when the photographic combination is exposed to X-ray, and wherein the radiography apparatus conducts making a radiograph under the condition that a distance between a focal point of an X-ray tube and the photographic combination is 1.0 to 3.0 m and a distance between an object and the photographic combination is 0.2 to 1.5 m.

Abstract: Cassette device for producing images, for a radiography apparatus of the type comprising a means for receiving mobile cassettes. The cassette comprises a casing of substantially parallelepipedal shape surrounding a means for producing images. The device comprises a means which forms a handle and is arranged on a small face of the casing The means which forms a handle is provided with a stop surface for insertion of the cassette into the reception means of the radiography apparatus.

Abstract: In a cassette tray for radiography, a positioning plate is provided on a rear surface of a tray, and the positioning plate includes grooves corresponding to cassette sizes. A stopper for holding a cassette has a spring, and engaging pieces which engage the groove and formed at a lower end of a slider moving vertically between a front plate of the tray and the positioning plate. When the engaging pieces of the stopper engage the grooves, the stopper projects from the front surface of the tray to hold the cassette at the position. When the engaging pieces of the stopper do not engage the grooves, the stopper is located on the same plane as the front plate surface of the tray. If the stopper is pressed and moved along the surface of the tray, the position for the cassette to be used can be selected. Accordingly, the cassette tray can securely hold various-sized cassettes, and the attaching operation therefor can be carried out easily in a short period of time.

Abstract: A filter for use in an x-ray film cassette for cephalometric imaging. The filter is interposed between the x-ray film being exposed an adjacent x-ray conversion screen. The filter has a substantially optically opaque portion that is aligned with the patient's forehead and chin and a transparent portion. An image produced on the film depicts skeletal features in the area aligned with the transparent portion and both skeletal and soft tissue features in an area aligned with the substantially optically opaque portion.

Abstract: This invention pertains to novel methods of radiography and novel screen-film cassettes with wide exposure latitude and/or high film contrast for use in radiography. The materials and methods of the subject invention can be used in mammography. In a specific example, this invention concerns the design of novel screen-film cassettes which can use at least one phosphor screen and multiple x-ray films in a single cassette. When used in mammography, this novel design enables additional breast images to be obtained on the faster, or slower, speed film from the same x-ray exposure used to produce a normal breast image on the normal speed film. These additional breast images provide high contrast information on the dense regions of the breast and in the edge areas of the compressed breast. These dense regions currently cause many missed diagnoses in breast cancer screening.

Abstract: An image-forming system for radiological imaging is described consisting of an intensifying screen comprising on a support at least one layer of a green-light emitting phosphor and, in operative association therewith, a prehardened light-sensitive photographic silver halide film material, comprising a support and on both sides thereof one or more hydrophilic colloid layers having monodisperse cubic silver chloroiodide grains with a mean crystal diameter of from 0.40 .mu.m up to 0.65 .mu.m or {111} tabular silver chloroiodide grains having an aspect ratio of from 5 to 20 and a tabularity from 20 to 200; wherein said grains have been spectrally sensitized in the green wavelength range and have been coated in a total amount of silver per sq.m. of from 6 g up to 8 g, expressed as an equivalent amount of silver nitrate per sq.m.; wherein in the image-forming system silver chloroiodide grains have been chemically sensitized with one or more selenide compound(s) generating silver selenide.

Abstract: A storage phosphor reader comprising: a receiving station for receiving a cassette containing a removable storage phosphor; a movable extraction mechanism for extracting and replacing a storage phosphor contained in a received cassette; a bar code located on the cassette/storage phosphor, the bar code including dimension data of a storage phosphor contained in the cassette; a bar code reader located at the receiving station for reading the bar code dimension data on a received storage phosphor cassette; and control means for controlling the movement of the extraction mechanism relative to a received storage phosphor cassette as a function of the read dimension data.

Abstract: A film treating apparatus has an apparatus body for executing the treatment of untreated film at a predetermined position, the apparatus body being capable of inserting thereinto and removing therefrom untreated film container containing untreated film therein. A film separating mechanism is provided in the apparatus body, the film separating mechanism taking out sheets of untreated film to be conveyed to the predetermined position one by one from the untreated film container. The film separating mechanism is insertable into and removable from the apparatus body in the same directions as the directions of insertion and removal of the untreated film container with respect to the apparatus body.

Abstract: A system for light-tight handling of a supply of media between a supply station, a workstation and a collecting station, comprises a media handling apparatus defined by a frame and a housing enclosing an internal confine. Within this confine are a supply station and a collecting station disposed at opposite ends of the frame. A positioning drive is suspended above the supply and collecting stations to move media between the supply, collecting and work stations. A lifting shoe is provided as part of the positioning drive and includes a flexible material handling sheet which assumes a first and a second given radius when respectively energized and reverse energized to engage the media supported in curved form. Also, supply and collecting cassettes are provided with a tambour coverings for respectively automatically uncovering and covering the supported media while still maintained in the light-tight confines of the housing.

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: A sheet feed apparatus for an imaging device. The apparatus includes a drive roller, plurality of sheets of photosensitive material, a photographically inert liner having upper and lower surfaces and a container for storing the sheets of photosensitive material. Proper feeding of the sheets of material and a stable location of the liner are ensured by appropriate coefficients of friction between the respective components. The top surface (19b) of the liner (19) to the bottom surface (18B) of the sheets (18) has a first coefficient of friction and the bottom of one sheet (18) to the top of another sheet (18) has a second coefficient of friction, the second coefficient friction being less than the first coefficient of friction, whereby multiple feeds of the sheets are reduced.

Abstract: A container and a method of using the container for storing sheets of material, such as photosensitive materials, enables individual sheets to be transported from the container to an imaging unit by a feed mechanism of the imaging unit. The container fits within the imaging unit to provide a light-tight environment for the photosensitive material. The container includes a clamping component to allow for the removal of a light-tight bag which encloses the photosensitive materials.

Abstract: An X-ray detection device for providing an output signal the value of which can be used to determine the radiation received at a selected region of an object, such as a patient, comprising a transmitter for being energized by X-rays, said transmitter producing radiation of a wavelength different from that of said X-rays, said transmitter aligned with X-ray film to be exposed, and wherein said transmitter is of substantially the same cross-sectional area of said X-ray film, a detector for detecting said radiation wherein said detector is substantially transparent to incident X-ray radiation, and a sensor connected to said detector, said sensor generating an output signal related to said radiation, the value of said output signal which can be used to determine the x-ray radiation received at said transmitter to provide X-ray exposure output readings at one or more selected locations of a patient's body.

Abstract: The present invention relates to a radiographic cassette to be used for exposing a radiographic film to X-ray radiation, the radiographic cassette comprising a base element and an upper element, a front phosphor screen adhered to the inner portion of the base element, and a back phosphor screen adhered to the inner portion of the upper element, wherein the radiographic cassette has a front electrical contact on the inner portion of the base element and a back electrical contact on the inner portion of the back element, the front and back electrical contacts facing each other and being connected to respective front and back outer electrical contacts. The invention also relates to the apparatus and method for automatically loading/unloading the above radiographic cassette.

Abstract: This invention pertains to novel methods of radiography and novel screen-film cassettes with wide exposure latitude and/or high film contrast for use in radiography. The materials and methods of the subject invention can be used in mammography. In a specific example, this invention concerns the design of novel screen-film cassettes which can use at least one phosphor screen and multiple x-ray films in a single cassette. When used in mammography, this novel design enables additional breast images to be obtained on the faster, or slower, speed film from the same x-ray exposure used to produce a normal breast image on the normal speed film. These additional breast images provide high contrast information on the dense regions of the breast and in the edge areas of the compressed breast. These dense regions currently cause many missed diagnoses in breast cancer screening.

Abstract: The present invention relates to a radiographic cassette to be used for exposing a radiographic film to X-ray radiation, the radiographic cassette comprising a base element and an upper element, a front phosphor screen adhered to the inner portion of the base element, and a back phosphor screen adhered to the inner portion of the upper element, wherein the radiographic cassette has a hole passing through each of the base and upper element and the front and back phosphor screen, the hole being closed with absorbing means capable to absorb the radiation to which the radiographic film is sensitive. The invention also relates to the apparatus and method for automatically loading/unloading the above radiographic cassette.

Abstract: The present invention relates to apparatus for separating sheets from substrates without substantially moving the sheets and, specifically where the sheets are sheets of X-ray film and the substrates are screens found in conventional X-ray cassettes.

Abstract: A patient identification x-ray cassette comprising: a cover having a window in the cover with predetermined transmission characteristics; a prompt emission stimulable phosphor coated substrate positioned essentially below the window having a phosphor that is selected to absorb at a first bandwidth and emit at a second bandwidth and the substrate is selected to transmit at least the first bandwidth; an image receiving element sensitive to electromagnetic radiation of the second bandwidth positioned at least below the window; and placing the phosphor coated substrate against the image receiving element. The phosphor is of the type that absorbs energy in the infrared portion of the electromagnetic spectrum and emits energy in the visible portion of the electromagnetic spectrum. The substrate upon which the coating is placed is relatively transparent to infrared wavelengths. The cassette allows for patient identification data to be written onto the x-ray film contained inside the cassette via an infrared source.

Abstract: An apparatus for indicating the presence or absence of a sheet within a cassette. The apparatus includes a plate and a mask stationarily mounted on a first side of the plate. An indicating element is movably mounted in overlapping orientation to the mask for one-dimensional movement between a first position wherein the indicating element and the mask define a first pattern indicative of the absence of the sheet, and a second position wherein the indicating element and the mask define a second pattern indicative of the presence of the sheet. A spring biases the indicating element in the first position, and a movable member moves the indicating element to define the second pattern when the sheet is positioned within the cassette. Alternatively, the indicating element is stationarily mounted and the mask is movably mounted for one-dimensional movement.

Abstract: A x-ray fill cassette for use with radiographic film. The cassette has a tube side unit and a cover unit. The units together define a film space for the film. The units are relatively pivotable between an open state and a closed state. The tube side unit is substantially convex in at least one of length and width dimensions when the traits are in the open state. The tube side unit is substantially flat in both length and width dimensions when the film is in the film space and the units are in the closed state. The tube side unit includes a compressible pad that adjoins the fill space. The cover unit includes a cover panel, a pressure panel, and an intensifying screen. The cover panel and the pressure panel are rigidly mounted in spaced parallel relation. The intensifying screen is adhered directly to the pressure panel adjoining the film space.

Abstract: According to this invention an assortment is offered of at least five silver halide industrial X-ray photographic materials, to be processed in the processing cycle of an automatic processing machine following the steps of developing, rinsing, fixing, rinsing and drying, wherein each of said film materials comprises at least one gelatino silver halide emulsion layer and at least one non-sensitive protective antistress coating on at least one side of a support, characterised in that for each of said materials belonging to the assortment the total amount of silver halide, expressed as the equivalent amount of silver nitrate, per square meter and per side is lying in the range from 7.

Abstract: A screen film cassette for radiographic use. The cassette includes front and rear screen-film combinations housed in container, and each screen-film combination includes a pair of intensifying screens which sandwich a film. A dividing filter is located between the two screen-film combinations to improve X-ray beam intensity incident on the back screen-film combination. The filter also reduces the transfer of visible light energy or K-characteristic photon energy, generated in one screen-film combination during the imaging process, to the adjacent screen-film combination. The invention provides for improved radiographic film contrast and image resolution.

Abstract: A container and a method of using the container for storing sheets of material, such as photosensitive materials, enables individual sheets to be transported from the container to an imaging unit by a feed mechanism of the imaging unit. The container fits within the imaging unit to provide a light-tight environment for the photosensitive material. The container includes a clamping component to allow for the removal of a light-tight bag which encloses the photosensitive materials.

Abstract: A roentgenography and a device used therefor by which shapes of the vertebral columns of vertebrate animal including Homo sapiens can be clearly photographed when once photographed for the sake of positively diagnosing an affected part of disc hernia and the like. The roentgenography is carried out by laying a patient vertebrate animal on a concavely curved X-ray film the radius of curvature of which is equal to a distance between the X-ray film and an X-ray tube positioned over the same to curve the vertebral column of the patient into a circularly arced shape, and irradiating perpendicularly X-ray from the center of this circular arc upon the vertebral column.

Abstract: An x-ray cassette including a body having an interior configured to hold a sheet of x-ray film. The body has a window disposed for the transmission of light into the interior of the body. A shutter is mounted on the body. The shutter is free of apertures. The shutter is slideable relative to the window between a closed position, in which the shutter occludes the passage of light through the window, and an open position, in which the shutter is spaced apart from the window to allow the passage of light through the window. A mechanical latch is reversibly translatable between locked and released configurations. The latch in the locked configuration arrests the shutter in the closed position. The latch in the released configuration frees the shutter.

Abstract: An x-ray cassette (1) to accommodate photosensitive material in sheet form, especially a phosphor film (2), having a cover part (1b), a bottom part (1a) and side parts (1c) joined thereto, the cover part, bottom part and side parts being made of plastic and closing off the cassette interior in a light-tight manner. The cassette has at least one electrically conductive element (6) which covers at least 20% of the surface of the cassette (1).

Abstract: The invention relates to an image plate (1) for intra-oral dental X-ray photography, the plate being placed in a shield (3) enveloping it for the duration of photography. According to the invention the shield has been made pervious to X-rays but impervious to visible light, and it comprises a closed shielding bag of plastic membrane. The shield may be made up of an inner shielding bag (3) impervious to light and a surrounding closed outer shielding bag which may be of transparent plastic membrane. After photography, the possible outer bag is first removed, the patient's saliva being removed along with it. Thereafter the image plate (1) and the surrounding shielding bag (3), one end (6) of which has been opened or, if an outer bag is used, is possibly already open, are introduced into the read-out apparatus, in which a pulling device grips the end of the plate in the bag, whereafter the bag can be pulled out while the plate remains in the read-out apparatus for the reading out of the image.

Abstract: An X-ray recording system is provided characterised in that(i) a double sided X-ray film is arranged between an X-ray intensifying screen and a reflecting sheet material(ii) said reflecting sheet material has at least one reflecting side(iii) the total white light reflection of said reflecting side is at least 30%(iv) said reflecting side of said reflecting sheet material is kept in close contact with one of the emulsion layers of said double sided X-ray film. Preferably said reflecting side shows a total white light reflection at least 50%.

Abstract: An x-ray film cassette having a base and a cover adapted to close upon the base. The cover is provided with an identification window. A pressure plate is secured within the cassette. The cover, pressure plate and base form a light-tight space for receiving a sheet of x-ray film. The pressure plate is also provided with an identification window which is in substantial alignment with the identification window of the cover. A light-tight slideable window shutter is provided for covering of the identification window of the cover and/or the pressure plate. The slideable window shutter, when in a first position, provides a light-tight seal against the windows and when in a second position allows information to be provided to an x-ray film contained within the cassette. An indicator assembly is secured to the pressure plate and is at least partially visible through the cover for indicating when film is present within the cassette and for indicating when the window shutter has been opened.

Abstract: A cassette houses therein a sheet-shaped radiation image recording medium such that the sheet-shaped radiation image recording medium is capable of being taken out therefrom. A nonwoven fabric is adhered to an inner surface of a flat plate-like portion of the cassette, which portion stands facing an image recording layer of the sheet-shaped radiation image recording medium. The image recording layer is thus prevented from being scratched by dust occurring from a cushioning material or entering the cassette from the exterior. Operations for feeding the sheet-shaped image recording medium into and out of the cassette are not obstructed due to fluctuations in the coefficient of friction of a cushioning material or due to a high coefficient of friction of the cushioning material.

Abstract: A radiographic film package for non-destructive testing purposes has been developed, comprising a radiographic film sheet which is composed of a film support coated at both sides with one or more silver halide emulsion layer(s) and one or more non-light-sensitive protective antistress coating(s) thereover, and a wrapper around said film sheet which is light-opaque and air-tight, and which comprises a heat-sealable thermoplastic layer at the inner side of the wrapper, a transparent polymer layer at the outer side of the wrapper and a layer of aluminum located between said transparent polymer layer and said heat-sealable thermoplastic layer, and wherein at least one antistatic layer coating is provided between the said thermoplastic layer of said wrapper and the emulsion layers of said film sheet.

Abstract: A system for orthopedic imaging is disclosed which consists of a supply of low crossover sensitometrically asymmetric radiographic elements and cassettes with various front and back intensifying screens to produce optimal bone images and useful images of surrounding flesh.

Abstract: Methods and apparatus for correcting the effect on image quality of a film processor which develops a radiographic image of a structure of interest on a film having an emulsion is disclosed. Such methods and apparatus include shielding a first portion of the film along one edge from the x-ray energy used for imaging the structure of interest and impressing a first calibrated test pattern on the first portion of the film. The first pattern includes a first calibrated graded stepwise density pattern having density positions. The density pattern is produced by visible light. A first plurality of symbols is located adjacent the first pattern, wherein each symbol indicates the magnitude of one of the density positions. A control film of similar emulsion as the emulsion of the image film is provided and impressed with a second calibrated test pattern along one edge.

Abstract: A film cassette comprising a base and a cover adapted to close upon and cooperate with the base. A pressure plate is disposed between the cover and the base. The cover, base and pressure plate form a light-tight space for receiving a sheet of film. At least one biasing member is provided for biasing the pressure plate against the base when the cover is closed on the base. The pressure plate and base each having a configuration such that when the cassette is closed, a predetermined pressure distribution is applied to a sheet of film placed in the cassette. There is also provided a method of making a cassette which includes steps for defining a specific shape for the fabricated cassette such that the cassette will provide improved performance during use.

Abstract: An X-ray photographic holder adapted to use a cassette includes a carriage having the cassette placed thereon, which is reciprocally movable between a cassette loading position and a radiographic position. On the carriage a pair of grippers are provided movable in the direction perpendicular to the carriage movement. An endless belt is driven by a motor, guided by pulleys provided on the carriage and engaged with the grippers. The carriage is stopped from moving by a stopper means so long as in the cassette loading position. In this state the cassette can be gripped by the grippers so to be set in a fixed position. After this positioning, the stopper means is released to move the carriage so that the center of the cassette can be brought to a radiographic position.

Abstract: A cassette for a photographic element of the kind used in computed radiography comprises a first cassette portion and a second cassette portion that are telescoped together during assembly to form the cassette. The first portion has a rectangular panel and edge walls extending around three side edges of the panel. The second cassette portion comprises a rectangular panel on which the photographic element is permanently secured. An edge wall is attached to one side edge only of the rectangular panel of the second cassette portion and it extends between the edge walls of the first cassette portion when the two portions are assembled together. A locking mechanism carried by the cassette portions holds them together in assembled relation but is easily released by an actuator for removing the second cassette portion and the photographic element so they can be delivered together to a computed radiography reader.

Abstract: A mechanism/device (29) in association with a radiographic cassette (20) in which X-ray film (28) or the like is exposed. Upon exposure, an LED (39) continually blinks, indicating exposure to the user, thereby obviating double exposure of the film. A test and reset circuit (80) informs the user at any time of the operational status of device (29). Device (29) comprises a sensor (30), a photodiode (47), a conduit formed by a bundle (31) of optical fibers which conveys light energy from sensor (30) to photodiode (47) that converts it into an electrical current controlled by an electronic circuit (35) which includes LED (39). Circuit (35) includes a detecting and amplifying circuit (51), an oscillating circuit (68), a latching circuit (65) for maintaining blinking of LED (39), and the test-and-reset circuit (80).

Abstract: An X ray film cassette has a marking mechanism whereby unique identification of the film cassette is provided by film exposed therewithin. Plural light-opaque markers mounted in the film cassette provide means for marking the X ray film therein during exposure with an image correlated with a marking on the cassette exterior, thereby indicating the particular cassette within which the X ray film was exposed.

Abstract: A stimulable phosphor sheet cassette has a light-tight casing which has an opening through which a stimulable phosphor sheet can be got in and out of the casing by moving the stimulable phosphor sheet in a direction parallel to the surface thereof and a light shielding member provided at the opening to prevent light from entering the casing but to permit the stimulable phosphor sheet to move through the opening. The casing is in such a size that it receives the stimulable phosphor sheet with one end portion of the stimulable phosphor sheet projecting outside the casing through the opening.

Abstract: An X-ray sheet film cassette has an upper cassette part, a lower cassette part adapted to face a radiation source and connected with the upper cassette part so that the cassette can be opened and closed. The lower cassette part has a frame and a plate connected with the frame. The plate includes an intermediate plate portion and two thin outer plate portions surrounding the intermediate plate portion. At least one of the outer plate portions extends outwardly beyond the intermediate plate portion at least at one edge of the plate and projects toward the interior of the X-ray sheet film cassette so as to form a web.

Abstract: A supply magazine for use in an apparatus for removing individual film that has been placed within a light-tight pouch having a leader secured to the leading edge. The magazine has a base which receives and retains a stack of sheet film within the light-tight pouch, and a cover secured to the base which can be rotated between a closed position and an open position. A take-up spindle is rotatably secured within the base for winding of the pouch thereon. The improvement comprises a lever arm for biasing the leader toward the spindle which cooperates with hook provided on the spindle when the cover is in the closed position. The lever arm includes a clamp pad which has a configuration which forms a resistive wall section in the leader when the magazine is in the closed position such that when the spindle is rotated, the hooks will engage the leader at the resistive wall section allowing the pouch to be wound around the spindle.

Abstract: A package for a stack of film sheets includes a pouch that encloses the stack of film sheets, and a leader that is positioned over a face of the pouch and is secured to a leading edge of the pouch so that the leader remains over the ouch until an operator pulls it away from the pouch and feeds it into a spindle to remove the package from the stack of film sheets.

Abstract: A cassette of the kind used for holding sheets of film to be exposed during x-ray of a patient is coded so that an x-ray technician or operator can easily distinguish cassettes containing exposed film from those cassettes containing unexposed film. This is accomplished by color coding two adjacent side edges of the cassette with color different from the other side edges of the cassette.

Abstract: Disclosed is a disposable sheet cassette and an image forming apparatus in which such a sheet cassette is preferably employed. The sheet cassette is comprised of a cassette box capable of accommodating a plurality of sheet materials and having a flange portion extending outwards from the cassette box, an adhesive layer formed on the flange portion, and a sheet cover bonded on the adhesive layer for covering an opening of the sheet cassette. A portion of the sheet cover can be repeatedly separated from or applied to the adhesive layer to open or close the opening. The image forming apparatus is provided with a take-up roller movable above the sheet cover for winding the sheet cover, a pair of roller supports for rotatably supporting the take-up roller, a driving mechanism for moving the roller supports and for rotating the take-up roller, and a control system for operating the driving mechanism so that the take-up roller can wind the sheet cover after the sheet cassette has been charged in the apparatus.

Abstract: A cassette holder and positioning assembly device for a portable x-ray mane, comprising: a mounting plate; oppositely adjustable vertical arms disposed in parallel relationship on the mounting plate attached in proximity to an outer periphery along vertical axes of the plate and opposite horizontal arms mounted fixedly on the plate and disposed in perpendicular relationship to the vertical arms; a selection handle disposed pivotally between alignment guides on a handle gear that meshes with a circumferential gear pivotally attached to linkage arms in perpendicular relationship to portions of the mounting plate beneath the alignment guides and pivotally attached to a backstop linkage arm in perpendicular relationship to the alignment guides, the backstop linkage arm is pivotally attached to a platform fixed to the mounting plate; a semi-circular indexing plate containing a plurality of notches in its inner arc and fixed in raised relation on the mounting plate above the selection handle; the selection handle h

Abstract: X-ray apparatus for supporting a patient is provided which comprises a housing having a top panel for supporting the patient and a bottom panel which rests on a table. The top and bottom panels are supported to be substantially parallel and spaced from one another. A frame is mounted in the housing to receive a conventional X-ray film cassette. Drive means is further provided to slidably transporting the frame longitudinally in X-ray apparatus housing. Further means is provided to accurately indicate the position of the frame.

Abstract: A magazine has a space for receiving a package containing a stack of film sheets enclosed within a bag. The bag is removable from the stack of sheets while the package is within the magazine by exerting a pulling force on the bag. Means are provided within the magazine for flexing the stack of film sheets in response to pulling of the bag from the stack, thus loosening adjacent sheets in the film stack that may be stuck together and facilitating removal of the sheets seriatim.

Abstract: An X-ray sheet film cassette is assembled of a bottom wall, side walls and a cover hinged to an upper part of one side wall. The lower part of the one side wall adjoining the bottom wall is reduced in thickness to form an abutment for the sheet film. The inner surface of the cover is provided with a resilient pressing pad which during the closing of the cover urges the sheet film against the abutment and in the closed condition of the cassette presses the film against the bottom. In this manner, when taking X-ray pictures of a part of patient's body which forms an angle relative to another body part, the unexposed section of the first mentioned body part which is adjacent the other body part, is minimized and well defined in position relative to the other body part.