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US3291983A - Cassette case for simultaneous tomography containing a stack of film assemblies - Google Patents

Cassette case for simultaneous tomography containing a stack of film assemblies Download PDF

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Publication number
US3291983A
US3291983A US276331A US27633163A US3291983A US 3291983 A US3291983 A US 3291983A US 276331 A US276331 A US 276331A US 27633163 A US27633163 A US 27633163A US 3291983 A US3291983 A US 3291983A
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assemblies
arm
assembly
film
planes
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Landan Pierre
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
    • G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
    • G03B42/04—Holders for X-ray films
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4291—Arrangements for detecting radiation specially adapted for radiation diagnosis the detector being combined with a grid or grating

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  • the present invention relates to a simultaneous tomography method in which the film and intensifying screens assemblies of a stack of such assemblies disposed in a case having an anti-diffusion grid (Bucky diaphragm), are made to effect proportional relative movements in the course of a sweep of the radiogenic head focus.
  • the object of the invention is to provide a cassette drawer which can be inserted in a case having an antidiffusion grid or Bucky diaphragm, of conventional type, there being added to the radiologic unit an element which is very simple in construction and in principle detachable.
  • the film and screens assembly superimposed on any assembly of the stack is disposed relative to the latter in such manner as to project toward one of the longitudinal edges of the cassette, and the projecting parts are provided with respective guide means associated with one another and connected to an actuating mechanism which co-operates with an element of the radiologic unit outside the case, whereby in the course of the longitudinal travel of the case said element constrains the actuating mechanism to impart relative displacements to the film and screens assemblies in a direction parallel with the longitudinal edges of the cassette and proportional to the displacement of the case relative to the table.
  • the projecting part comprises preferably two pins which are centered on a line parallel with the longitudinal edges of the cassette and are engaged in respective slots in two parallel levers which are pivoted to the cassette and adapted to undergo an angular movement in the course of the longitudinal travel of the case in such manner that each film and screens assembly remains at a fixed distance from the longitudinal edges of the cassette.
  • FIGS. 2 and 3 are diagrammatic perspective views with parts in section, of respectively a cassette drawer and a stack of films employed in the unit shown in FIG. 1;
  • FIG. 4 is a geometric diagram illustrating the operation of the linkage shown in FIG. 2;
  • FIG. 5 is a diagram showing the manner in which the linkage operates
  • FIGS. 6-10 are variants of the arrangement of the film and screens assemblies.
  • FIG. 11 is a diagrammatic perspective view of a variant of the connection between the actuating mechanism and the stack of film and screens assemblies.
  • FIG. 1 shows a radiogra-phic unit equipped for taking tomographic pictures.
  • This unit comprises a table 1 on which the patient to be examined can lie.
  • a radiogenic head 6 connected to a journal 7 which is mounted on a vertical column 8 and permits orientating the head 6.
  • the radiogenic focus is located on the axis of the journal 7.
  • the column 8 can be moved in translation in a direction parallel with the table owing to the provision of rails 9 and 11 so as to cause the radiogenic focus to sweep between the positions F and F
  • the radiologic films (a single film is shown at W in FIG. 1) which are adapted to receive the image at different levels of the opacities presented by the organs of the patient examined, are each disposed between two intensifying screens and are contained in a cassette or support 10 engaged in a light-tight case 12 disposed as near as possible to, and under, the table.
  • the top of this case comprises an anti-diffusion grid to which normally movement is imparted in the course of the emission of the X-rays so as to prevent the weft of the grid being reproduced on the film.
  • This case which is conventionally called Bucky diaphragm can be displaced in a direction parallel with itself owing to the provision of guide elements (not shown).
  • FIG. 2 shows the cassette drawer or support 10 according to the invention which can be substituted for the conventional drawers of the cases having an anti-diffusion grid, for carrying out simultaneous tomography in combination with the stack E of film and screens assemblies shown in FIG. 2.
  • This cassette drawer has a generally rectangular-sided shape and comprises a bottom 26 provided with walls 27, 28 and a lid 29 which is mounted by means of hinges 31 on the rear wall and, when closed, renders the cassette light-tight.
  • the lid can be positively closed by an appropriate closing means.
  • a plate 32 having feet 33 and adapted to receive the stack E of film and screens assemblies, is secured to the bottom 26 by screws and nuts 35. Pivoted to the forward edge of this plate are two levers or arms 34, 36 each of which has an elongated aperture or slot 37.
  • each film and intensifying screens assembly comprises a radiologic film W, W, W" located between two. thin intensifying screens 38, 39.
  • Each intensifying screen 38, 39 comprises an inextensible support which is preferably composed of metal having small atomic weight, for example aluminium, and is transparent to X-rays and opaque to light, the thickness thereof being about 200
  • the advantage of the metallic nature of the screens support is that it is possible to use a very thin intensifying screen. Above all, due to its metallic nature the sliding surfaces can all be earthed thereby avoiding electrostatic discharges which would occur owing to friction if the surfaces were of insulating material, such as thermoplastic material, and would be harmful -(sparks could deteriorate the screens and mark the film).
  • the support of the screens is covered with a layer of calcium tungstate or the like having a v sible fluorescence when exposed to X-rays.
  • the intensifying power of the screens increases downwardly so as to com- 3 pensate the absorption of the X-rays by the overlying assemblies. 7
  • the radiologic film W has a thickness of the order of 150,u..
  • Each film and screens assembly has an overall thickness of the order of a millimeter.
  • the stack E normally comprises six film and screens assemblies but for reasons of clarity only three assemblies have been shown, namely T, T, T", the assembly T being secured to the top of the plate 32.
  • the diiferent assemblies of a stack of assemblies are so arranged that each of them, with the exception of the bottom assembly which is fixed, is capable of sliding in a direction parallel with itself relative to the subjacent assembly in the longitudinal direction of the radiologic table (arrow f)
  • the two screens 38, 39 of the film and screens assemblies are retained in a mount 40 comprising two thin metal strips 42, 43 which are stuck to the adjacent edges of the two screens and are interconnected for example by rivets 44 which extend through a member 46 whose thickness is equal to that of the film and screens assembly.
  • the width of the strips 42, 43 of the mount 40 is the same in respect of all of the assemblies but the width of the member 46 progressively increases in a regular man ner from. the lower assembly to the upper assembly so that each mount can project to a fixed extent relative to the mount of the subjacent assembly when the stack is in its position of utilization.
  • a guide bar 47 parallel with the strips 42, 43 is attached to the underside of the member 46 of the mounts 40 of the movable assemblies, the vertical outer face of this bar being coplanar with the edge of the member 46 of the corresponding assembly and its vertical inner face being adapted to bear either against the outer face of the mount 40 of the subjacent assembly T' or against the edge of the plate 32 and the edge of the mount of the fixed assembly T, when the assemblies and their mounts are arranged together in the drawer 10.
  • FIG. 3 This arrangement is shown in FIG. 3 in which the lower end of the guide bars 47 which is co-planar with the lower face of the plate 32 (FIGS. 2 and 3) bears against the levers 34, 36 which are pivoted to this plate by a pin 48 extending through the mount 40 of the fixed assembly T.
  • Each guide bar 47 and the corresponding mounts 40 are maintained in their relative longitudinal position by two pins 49, 49 which extendthroug-h the mounts and the guide bars and are engaged at their lower end in the openings 37 in the levers 34, 36. These pins are retained in the levers 34, 36 by their enlarged heads 49a.
  • the two levers 34, 36 are maintained parallel with one another by a link 50 provided in the vicinity of its two ends with a pin 51 which forms a screw and is engaged and retained in the slots 37 of the respective levers so that these pins are slidable in these slots while permitting a relative angular movement on the part of the levers and link.
  • this link 50 is combined with an actuating mechanism which comprises an arm. 52 having a longitudinal slot 71 in which is engaged a pin 53 which is fixed relative to the drawer.
  • the ends 54, 56 of this arm extendon either side of the pin 53, the end 54 being pivoted by a pin 57 to the middle of the link 50 whereas the other end 56 extends out of the drawer through an opening 58 formed in the upper part of the forward wall 57,
  • the part of the actuating arm 52 located at the rear of the ,pin 53 extends through a second opening 62 provided in a partition wall 63 which is parallel with the forward wall 57 and constitutes a light-screening element.
  • the forward end 56 of the arm 52 is adapted to cooperate with an abutment device 60 (FIG. 2) which is secured to the radiologic table 1 in such manner that in the course of the sweep, that is, during the travel of the Bucky diaphragm, the arm effects a movement capable of transmitting to the film and screen assemblies stacked on the plate 32 a relative sliding movement through the medium of the link 50 and levers 36, 37.
  • an abutment device 60 FIG. 2
  • the abutment device 60 com-prises a fork 96 which is fixed to the table 1 by clamping screws 97 and is rigid with a horizontal strip 98 on which is slidable a block 104 which is held in position by a clamping screw 99.
  • a vertical rod 65 Secured to this block 104 is a vertical rod 65 which extends downwardly and whose axis coincides with the vertical line intersecting the radiogenic focus in the median vertical position.
  • This vertical rod constitutes an abutment adapted to engage a fork-shaped member which is slidably mounted on the end 56 .of the actuating arm 52 and is capable of being adjusted in position by means of a clamping screw 194 engaged in an axial slot 64 formed in the end 56.
  • FIG. 5 The successive relative positions of the abutment or rod 65 and the member 100 in the course of the sweep are shown in FIG. 5 in which for reasons of clarity the Bucky diaphragm is shown in position fixed and the abutment movable.
  • B is the starting point of the travel at which the fork member 100 is not yet engaged with the abutment 65
  • B' is the point at which the correct speed is reached, the fork member being in engagement with the abutment 65
  • B is the point at which the emission of the X-rays starts
  • B is that at which the emission stops
  • B and B are the symmetrical points of B' and B the abutment 65 leaving the fork at B
  • B is the starting point of the travel at which the fork member 100 is not yet engaged with the abutment 65
  • B' is the point at which the correct speed is reached, the fork member being in engagement with the abutment 65
  • B is the point at which the emission of the X-rays starts
  • B is that
  • the link 50 moves in a direction parallel with itself while remaining at a fixed distance from the adjacent edge 47 of the stack, and consequently from the edge of the table, since it is for this purpose applied against the stack of film and screen assemblies owing to the provision of two pressure-applying rollers 91 which are freely rotative on vertical spindles 92. fixed to the bottom of the cassette.
  • the position of the pin 53 on which the actuating arm 52 is mounted can be adjusted transversely, that is, in a direction perpendicular to the longitudinal axis of the table and to the forward wall 27 of the drawer.
  • the pin 53 which extends through the slot 71 of the arm 52, is fixed to a block 72 which is slidably mounted on the bottom 26 of the drawer, this block having a tapped hole 73 in which is screwthreadedly engaged a screwthreaded rod 74 which can be rotated by a knob 76 outside the forward wal127 of the drawer, this red being journalled in this wall.
  • the rear end of the rod 74 is journalled in the partition wall 63 under the opening 62.
  • f is the fixed distance between the radiogenic focus and the plane of the film giving the base section
  • a is half the angle of sweep.
  • FIG. 4 shows a geometric diagram of the operation of the linkage of the drawer just described.
  • G designates the pivot axis 53 of the arm 52, P
  • the indices 1 and 2 added to the moving parts correspond respectively to the beginning and the end of a sweep F F
  • the relation (2) therefore permits obtaining four functional scales corresponding to these respective values of Ay and giving the value of v as a function of c, that is, the position of the fundamental section plane.
  • These scales are shown in FIG. 2 and carry reference numbers 80, 81, 82, 83 and are, for example, marked on the bottom 26 of the drawer.
  • v corresponding to the selected values of c on each of these scales is materialized by the position of a pointer 84 rigid with the sliding block 72, so that by rotating the knob 76 and obtaining the coincidence of the pointer 84 with the value of c on the corresponding scale, the required spacing Ay between the section planes is obtained.
  • a dotted letter A, B, C are identification marks 86 of the different pictures obtained in the course of the sweep. They can be obtained by cutting out a sheet of black paper the cut-out letter being thereafter stuck to the inner face of the screen.
  • the luminescence due to the calcium tungstate of the intensifying screens is neutralized throughout the surface occupied by the black zone of the letters so that the image of the latter is reproduced on the respective films.
  • Each letter can obviously be repeated on any other screen so as to intensify the marking. Instead of using a cut-out black sheet it is also possible to scratch the letter on the calcium tungstate surface.
  • the length of the wall 27 is assumed to correspond to the opening of minimum longitudinal dimension and a slidable member 110 or 111 is provided on at least two of the outer corners of the cassette adjacent the transverse wall 28.
  • the forward member 110 is a bracket which can be fixed in position by screws 112 which extend through a slot 113 in this member.
  • the rear member is in the form of a plate 111 provided with a slot which can be held in position in similar manner.
  • tapped holes 114 Provided on one of the branches of the forward bracket 110 are tapped holes 114, the distance between these holes and the forward wall 27 of the cassette being so chosen that by screwing a stud in either of the holes 114 there is obtained an abutment adapted to abut the body of the Bucky diaphragm and thereby limit to a given amount the extent to which the drawer is moved inwardly.
  • the stack E of the film and screens assemblies form with the plate 32 and the two pivoted levers 34 and 36 an assemblage which can be removed in one unit from the cassette drawer by unscrewing and withdrawing the screws 51 and the nuts 35 which secure the feet 33 to the bottom 26. This permits an easy replacement of the screens when they are worn or damaged.
  • the fork-shaped member 100 can be in the form of a single branch.
  • the single branch can occupy, as desired, the situation of one or the other branch of the fork-shaped member and is slidably mounted on the end 56 of the actuating arm 52 and adjusted in position owing to the provision of aclamping screw.
  • the block 72 is slidably mounted on the bottom of the drawer and it carries two cylindrical rods which replace the screwthreaded rod 74 and extend through the block, these rods extending in the same direction as the rod 74. This block can then be shifted manually and fixed in position by means of a lateral clamping screw clamping one of the cylindrical rods.
  • FIGS. 6-10 show a number of variants of the stack of film and screens assemblies.
  • the strips 42a, 43a of the mounts extend along the entire width of the members 46 so that the width of these strips varies from one assembly to the next.
  • the mount 40' for the film and screens assemblies is constiututed by an extension of the intensifying screens 38, 39, which are of metal, the pins 49 and 48 being rivetted to the corresponding extensions of the screens.
  • the intensifying screens are also extended so as to be coplanar with the outer face of the guide bars 47 and a single metal fixing strip is provided on the upper intensifying screen 39 of each assembly, this strip having a width which is just sufiicient to receive the rivetted end of the pins 49.
  • the member 46 has two recesses 126 in which the corresponding edges of the screens 38, 39 are fitted, these recesses being stuck to the surface of the screens either directly on the fluorescent substance f (FIG. 10) or after this substance has been removed from the support S of the screen which is laid bare '(FIG. 9).
  • FIG. 11 shows a manner of actuating the film and screens assemblies which differs fro-m that shown in FIGS. 2 and 3.
  • the mount 40 of each assembly comprises a single pin 49a which is disposed in the middle of the mount, and the rear end 54 of the actuating arm has an axial slot 54a in which are directly engaged the respective pins 49a of the mounts 40.
  • the pin 53 is, moreover, a simple pivot pin for the actuating arm. It is also possible to provide for the pivot pin 53 of the actuating arm an arrangement identical to that shown in FIG. 2, in which case the actuating arm is pivoted by means of apin to the middle of the mount of the upper assembly,
  • the bar 47 of the upper film and screens assembly can fulfill the function of the link 50, in which case the pins 50 coincide with the pins 49 of this assembly, the pivotal connection 57 being then common to ,the end 54 of the arm 52 and the bar 47 of said upper assembly. 7
  • the actuating arm 52 insead of co-operating with the fixed abutment 65 of the radiologic table, could be actuated by the moving column carrying the lamp of the tomographic unit. In this case, the actuating arm 52 would extend out of the cassette through the rear wall of the latter in passing between the plate 32 and the bottom 26 of the ca-ssete.
  • the part of the actuating arm 52 which extends out of the cassette could be utilized in combination with a switch for example provided on the radiologic table.
  • the screens could be united along their two longitudinal edges by two mounts which are substituted for the single mount described hereinbefore.
  • the film would be introduced or withdrawn in a transverse end opening and the second mount would be combined with a second actuating mechanism and a fixed abutment 65 which are symmetrical, relative to the longitudinal median plane of the table, to those shown in FIG. 2.
  • Device for the simultaneous tomography of a body supported on a table of a radiographic unit the device being adapted to be supported by a case which is movable longitudinally of the table on the side of the table opposed to said body by an X-ray source movable longitudinally of the table so that the case moves in unison with but in the opposite direction to the X-ray source, the device having a longitudinal axis adapted to extend longitudinally of the table and containing in combination: a support, a stack of adjoining relatively movable thin assemblies, each assembly comprising a radiation-sensitive film and two intensifying screens, one of said intensifying screens disposed on each side of the film, guide means associated with the assemblies for guiding the assemblies so that they are movable relative to each other in a plurality of parallel planes in a direction parallel with said longitudinal axis, and an actuating mechanism comprising an arm mounted to pivot relative to the support about an axis substantially perpendicular to said planes from one side to the other of a first plane perpendicular
  • Device for the simultaneous tomography of a body supported on a table of a radiographic unit the device being adapted to be supported by a case which is movable longitudinally of the table on the side of the table opposed to said body by an X-ray source movable longitudinally of the table so that the case moves in unison with but in the opposite direction to the X-ray source, said device having a longitudinal axis adapted to extend longitudinally of the table and comprising in combination: a support, a stack of closely adjacent relatively movable thin assemblies, the stack of assemblies having an end assembly adjoining the support, means maintaining said end assembly stationary relative to the support, each assembly comprising an X-ray sensitive film and two intensifying screens, one of said screens being disposed on each side of the film, guide means associated with the assemblies for guiding the assemblies so that they are movable relative to each other in a plurality of parallel planes in a direction parallel with said longitudinal axis, an actuating mechanism for shifting the assemblies in said planes, the actuating mechanism comprising an
  • each assembly comprises a mount interconnecting the corresponding two intensifying screens, the overall thickness of each assembly being substantially 1 mm. and the assemblies being in contact with each other so that the films lie very nearly in a common plane, said guide means comprising portions on said mounts which slidably engage each other so as to be relatively slidable in a direction parallel with said longitudinal axis.
  • Device for the simultaneous tomography of a body supported on a table of a radiographic unit the device being adapted to be supported by a case which is movable longitudinally of the table on the side of the table opposed to said body by an X-ray source movable longitudinally of the table so that the case moves in unison with but in the opposite direction to the X-ray source, said device having a longitudinal axis adapted to extend longitudinally of the table and comprising in combination: a support, a stack of closely adjacent relatively movable thin assemblies carried by the support, each assembly comprising an X-ray sensitive film and two intensifying screens, one of said screens being disposed on each side of the film, guiding and locating means associated with the assemblies and the support for guiding the assemblies so that they are movable relative to each other in a plurality of parallel planes in a single direction parallel with said longitudinal axis, two parallel arms mounted on the support in spaced relation to each other to pivot about pivot axes substantially perpendicular to said planes, a link
  • Device as claimed in claim 4 further comprising a block adjustably mounted on the support for adjustment in a direction substantially perpendicular to said longitudinal axis, the first pivot pin being mounted on the block and movable in an elongated slot extending longitudinally in the third arm, whereby the angular movement of the two parellel arms can be varied for a given movement of the case and support relative to the table.
  • Device as claimed in claim 5 further comprising a graduated scale mounted on the support and a pointer mounted on the block, the graduations of the scale corresponding to the distance between the X-ray source and the basic tomographic section through said body.
  • Device for the simultaneous tomography of a body supported on a table of a radiographic unit the device being adapted to be supported by a case which is movable longitudinally of the table on the side of the table opposed to said body by an X-ray source movable longitudinally of the table so that the case moves in unison with but in the opposite direction to the X-ray source, said device having a longitudinal axis adapted to extend longitudinally of the table and comprising in combination: a support, a stack of closely adjacent relatively movable thin assemblies carried by the support, each assembly comprising an X-ray sensitive fil-m and two intensifying screens, one of said screens being disposed on each side of the fil-m, guide means associated with the assemblies for guiding the assemblies so that they are movable relative to each other in a plurality of parallel planes in a direction parallel with said longitudinal axis, an arm mounted on the support to pivot about a pivot axis substantially perpendicular to said planes, a slot in the arm, each of said assemblies having

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US276331A 1962-05-08 1963-04-29 Cassette case for simultaneous tomography containing a stack of film assemblies Expired - Lifetime US3291983A (en)

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FR896899A FR1336114A (fr) 1962-05-08 1962-05-08 Perfectionnement à la tomographie simultanée

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509337A (en) * 1967-11-30 1970-04-28 Us Army Test object and cassette for tomography
US3976886A (en) * 1974-11-18 1976-08-24 Pierre Landau Apparatus for effecting a simultaneous multiple tomography
US4581535A (en) * 1981-10-16 1986-04-08 Fuji Photo Film Co., Ltd. Method of recording X-ray image
US5086445A (en) * 1990-09-13 1992-02-04 E. I. Du Pont De Nemours And Company Method and apparatus for referencing a cassette and/or an intensifying screen on a radiograph
WO2007134769A3 (de) * 2006-05-24 2009-12-03 DüRR DENTAL AG Speichereinheit zur herstellung von durchstrahlungsbildern sowie verfahren zum auslesen einer solchen

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Publication number Priority date Publication date Assignee Title
DE2941395A1 (de) * 1979-10-12 1981-04-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Vorrichtung zur erzeugung von schichtbildern aus vielfachperspektivbildern mit unterschiedlichem ueberlagerungsgrad
DE3006828A1 (de) * 1980-02-23 1981-09-10 Philips Patentverwaltung Gmbh, 2000 Hamburg Vorrichtung zur erzeugung von schichtbildern eines dreidimensionalen objektes mit hilfe von ueberlagerungszonogrammen
FR2548396A1 (fr) * 1983-06-16 1985-01-04 Landau Pierre Cassette pour tomographie multiple simultanee
EP0229971B1 (de) * 1985-12-20 1990-11-07 Siemens Aktiengesellschaft Zahnärztliches Röntgendiagnostikgerät zur Erstellung von Panorama-Schichtaufnahmen vom Kiefer eines Patienten

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US1925546A (en) * 1931-10-27 1933-09-05 Eastman Kodak Co X-ray intensifying screen
US2120729A (en) * 1936-03-14 1938-06-14 Chausse Clement Sylvain Process and device for automatically centering x-rays in radiographic and stereoscopic radiographic apparatus
US2235144A (en) * 1939-04-10 1941-03-18 Abraham E Colcher Radiographic apparatus
US2400516A (en) * 1943-07-20 1946-05-21 Kieffer Jean Apparatus and method for sectional radiography
US2680199A (en) * 1952-03-18 1954-06-01 Abel Martin Sidney Radiographic method and apparatus
DE968955C (de) * 1951-04-05 1958-04-10 Dr Med Erich Liese Einrichtung fuer medizinische Roentgenaufnahmegeraete

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
FR1265256A (fr) * 1960-05-17 1961-06-30 Perfectionnement à la tomographie simultanée

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925546A (en) * 1931-10-27 1933-09-05 Eastman Kodak Co X-ray intensifying screen
US2120729A (en) * 1936-03-14 1938-06-14 Chausse Clement Sylvain Process and device for automatically centering x-rays in radiographic and stereoscopic radiographic apparatus
US2235144A (en) * 1939-04-10 1941-03-18 Abraham E Colcher Radiographic apparatus
US2400516A (en) * 1943-07-20 1946-05-21 Kieffer Jean Apparatus and method for sectional radiography
DE968955C (de) * 1951-04-05 1958-04-10 Dr Med Erich Liese Einrichtung fuer medizinische Roentgenaufnahmegeraete
US2680199A (en) * 1952-03-18 1954-06-01 Abel Martin Sidney Radiographic method and apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509337A (en) * 1967-11-30 1970-04-28 Us Army Test object and cassette for tomography
US3976886A (en) * 1974-11-18 1976-08-24 Pierre Landau Apparatus for effecting a simultaneous multiple tomography
US4581535A (en) * 1981-10-16 1986-04-08 Fuji Photo Film Co., Ltd. Method of recording X-ray image
US5086445A (en) * 1990-09-13 1992-02-04 E. I. Du Pont De Nemours And Company Method and apparatus for referencing a cassette and/or an intensifying screen on a radiograph
WO2007134769A3 (de) * 2006-05-24 2009-12-03 DüRR DENTAL AG Speichereinheit zur herstellung von durchstrahlungsbildern sowie verfahren zum auslesen einer solchen
JP2009544001A (ja) * 2006-05-24 2009-12-10 デュール デンタル アクチェンゲゼルシャフト 放射線画像を作成するための記憶ユニット及びかかる記憶ユニットを読みとる方法
US20100127187A1 (en) * 2006-05-24 2010-05-27 Duerr Dental Ag Memory Unit for Producing Radiographic Images, and Method for Reading such a Memory Unit

Also Published As

Publication number Publication date
NL292411A (de)
FR1336114A (fr) 1963-08-30
NL139395B (nl) 1973-07-16
DE1244555B (de) 1967-07-13

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