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WO1989006377A1 - Systeme d'enregistrement de donnees sur un film a rayons x place dans une cassette - Google Patents

Systeme d'enregistrement de donnees sur un film a rayons x place dans une cassette Download PDF

Info

Publication number
WO1989006377A1
WO1989006377A1 PCT/EP1988/001205 EP8801205W WO8906377A1 WO 1989006377 A1 WO1989006377 A1 WO 1989006377A1 EP 8801205 W EP8801205 W EP 8801205W WO 8906377 A1 WO8906377 A1 WO 8906377A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
cassette
window
column
led
Prior art date
Application number
PCT/EP1988/001205
Other languages
English (en)
Inventor
Ronald Jan Geluk
Original Assignee
B.V. Optische Industrie 'de Oude Delft'
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by B.V. Optische Industrie 'de Oude Delft' filed Critical B.V. Optische Industrie 'de Oude Delft'
Publication of WO1989006377A1 publication Critical patent/WO1989006377A1/fr

Links

Classifications

    • 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
    • G03B42/047—Holders for X-ray films provided with marking means

Definitions

  • the invention relates to a system for recording data on an x-ray film fitted in a cassette, which cassette is provided with an exposure window.
  • a cassette with an x-ray film therein In mammographic radiographs, in particular, use is at present made of a cassette with an x-ray film therein, it being possible for the material of the cassette to transmit the x-ray radiation.
  • a cassette is provided with a window via which a portion of the xray film can be exposed to visible light in order to provide data relating to the patient directly on the film.
  • this recording of the patient data on the film was carried out beforehand by means of a separate exposure. This involves the risk that a cassette with a film in it with the data of a particular patient is inadvertently used for radiographing another patient. It is obvious that such errors can in general be inconvenient and in certain cases even extremely painful for the patient concerned.
  • the object of the invention is to offer a solution to this problem by providing a system in which a patient's data are recorded on the x-ray film only when the cassette is placed in the x-ray machine with which the radiograph of the patient is to be made. This makes it possible to eliminate the risk that incorrect patient data are recorded on the x-ray film because when the data are recorded, the patient concerned is already present at the x-ray machine.
  • a problem in developing a system of the abovementioned type is that the exposure windows for the patient data have different dimensions and are fitted at different positions in the cassette housing in cassettes of different makes.
  • Another problem is that, in the case of a mammography cassette placed in the x-ray machine, there is only a very small space having a height of approximately 20 mm between the cassette wall fitted with the window and a lead plate which serves to absorb the x-ray radiation transmitted through the cassette so that the space for exposing the window of the cassette placed in the x-ray machine is extremely limited.
  • the invention offers a solution to this problem by providing a system of the abovementioned type provided with at least one column of light-emitting components and an imaging optical system comprising at least one lens for imaging the column of light-emitting components in the space defined by the window, and with means for bringing about relative displacement between the cassette and the recording system.
  • the light-emitting components are light-emitting diodes, hereinafter termed LED's, which offer the advantage of a small dimension accompanied by a relatively high light yield, each LED in a column being coupled to the optical system via an associated light guide and the end of the light guide situated nearest each LED being attached to the LED.
  • this preferred embodiment is provided with a column of LED's in which the successive lines to be imaged in the window of the cassette are imaged consecutively, it is also possible to give the column of LED's a length such that only one column section always provides for the exposure of one line so that, by driving all the column sections simultaneously, all the lines can be imaged simultaneously by causing the LED's and the optical system to move across the window.
  • each matrix is driven in a manner such that it exposes the window character-by-character, it being possible in the case of a matrix having a sufficiently large column length, that a number of lines can again be exposed s imultaneously.
  • Fig. 1 shows a bottom view of a film cassette
  • Fig. 2 is a section of the cassette according to Fig. 1 along the line II - II, said cassette being placed in a radiographing device which is provided with the system according to the invention which is shown diagrammatically;
  • Fig. 3a shows a first possible way of exposing the x-ray film
  • Fig. 3b shows a second possible way of exposing the x-ray film
  • Fig. 3c shows a third possible way of exposing the x-ray film
  • Fig. 4a shows a detail of the system according to Fig. 3a;
  • Fig. 4b shows a front view of the free ends of the light guides, the other ends of which are coupled to the LED's;
  • FIG. 4c shows a more specific detail of the way of coupling a light guide to a LED in the embodiment according to Fig. 4a;
  • Fig. 5 shows a variant of the system according to the invention.
  • Figures 1 and 2 show, in bottom view and in section respectively, one of the diverse known types of xray film cassettes, comprising a housing 1 having a window 2 in the bottom face thereof, via which window patient data can be provided on the f ilm 3, which is present in the cassette and is also sensitive to x-ray radiation, with the aid of visible light.
  • the dimensions of the window may be approximately 16 x 35 mm 2 .
  • the housing 1 is provided with a hinge 4 to enable it to be opened and the film to be taken out of the housing.
  • Some type of removable or slide-aside cover may be provided in front of the window 2 to prevent premature exposure via the window.
  • the cassette 1 when used in an x-ray machine intended for mammography, there is situated beneath the cassette 1 a lead plate 5 which serves to absorb any radiation still transmitted through the x-ray film. Between the bottom 1' of the cassette and the plate 5, a space is available which has a height of only 20 mm, in which space the imaging system 6 according to the invention is placed.
  • the system comprises a light source 7, to be discussed in more detail below, a lens 8 and a mirror 9.
  • the lens 8 has a focal length such that it sharply images the light source 7 on the film 3 via the mirror 9.
  • the light source 7, the lens 8 and the mirror 9 are mounted on a common frame or carrier, which is not shown, means being provided, which are also not shown, for causing said frame or the carrier to move in the longitudinal direction, ie. in the plane of the drawing, over the window in order to be able to expose successive film regions.
  • a common frame or carrier which is not shown
  • means being provided which are also not shown, for causing said frame or the carrier to move in the longitudinal direction, ie. in the plane of the drawing, over the window in order to be able to expose successive film regions.
  • the required alphanumerical information can be imaged on the film in diverse ways, viz. by:
  • Figure 3a shows how the film region to be exposed via the window can be exposed with the aid of a column 10 composed of LED's 7.
  • the LED's are driven in a manner such that the required imaging of alphanumerical symbols is obtained; it being possible to cause the column to move continuously with respect to the window, in which process the LED's image different parts of a symbol in the window at successive instants.
  • An advantage of this solution is the low cost price because few LED's are necessary and the electronic circuit for driving the LED's can be simple.
  • Figure 3b shows how the film region to be exposed via the window can be exposed with the aid of a matrix 11 composed of LED's 7.
  • the matrix can be moved continuously across the window, but it is also possible to drive the successive columns by means of multiplexing so that they light up consecutively.
  • the drive of the LED's is simple but it is necessary to cause the matrix to stop with respect to the window for each exposure so that the mechanism for causing the matrix to move across the window is more complicated.
  • this embodiment has the further advantage that the amount of light used for the exposure can be regulated by regulating the time that the matrix stands still.
  • An LED has a relatively small actual light-emitting surface with respect to the housing thereof because the housing of the LED functions as a lens and diffuser. Relatively large LED's would therefore have to be used for an adequately high light yield.
  • an as intense light as possible from preferably adjacent, small punctiform sources is required so that a good letter quality can be obtained.
  • the light source should also preferably be kept small in order to keep the optical reduction small (maximum 8 to 9 times) in order to ensure an adequately large depth of focus. It is obvious that this produces conflicting requirements.
  • a solution to this is offered by providing a number of light guides situated next to each other which are coupled, on the one hand, to relatively large LED's, which therefore have a high light yield, and, on the other hand, the free ends of which have a small diameter and can easily be placed in an unbroken row . All this is shown in Figures 4a and b.
  • 4a shows, diagrammatically, a column 11 composed of LED's 7 in which a light guide 12 is connected to each LED.
  • the free ends of the light guides are, as shown in Figure 4b, accommodated in a holder 13 which ensures that said free ends are able to position themselves close to each other in one line.
  • the other ends of the light guides 12, which are fitted in the holder 13 and provide the exposure of the x-ray film are placed, as shown in Figure 4b, close to each other in one line, in order to ensure as good a letter quality as possible.
  • These free fibre ends are preferably directed more or less towards the centre of the lens 8, as a result of which the light loss in the light emerging from the outermost light guides as a consequence of the decrease in light at the edge of the lens is prevented. It is also possible to place the light guides parallel and to place a field lens between the free ends thereof and the lens 8 to converge the light coming from the light guides towards the centre of the lens 8.
  • an adequate number of light guides 12 can be placed next to each other to image one column of one character, but preferably enough light guides are placed next to each other for it to be possible to expose simultaneously the character columns of all the lines to be imaged above each other in the window.
  • the recording system according to the invention can also be used advantageously in x-ray film cassettes which are intended for radiographing other sections of the body, for example radiographing the thorax or the abdomen.
  • a larger space is often available between the bottom wall of the cassette and the lead plate than in mammography and the recording system may possibly be constructed without reflecting surface, the light-emitting components being placed at a distance below the cassette and the lens being located between said components and the bottom wall of the cassette so that the light-emitting components are imaged directly on the cassette.
  • Figure 5 shows a side view of the system and the cassette seen along the line V-V in Figure 1 and in which light-emitting components 7 and a lens 8 are again provided in a column or a matrix.
  • the lens 8 is positioned between the column of components 7 and the window 2 in the cassette housing 2 in a manner such that the Scheimpflug condition is satisfied, as a result of which the imaging of the column in the window is sharp.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

Le système décrit sert à enregistrer des données sur un film à rayons X placé dans une cassette, laquelle est pourvue d'une fenêtre d'exposition. Un système optique permet la représentation en image d'une colonne de composants électroluminescents dans l'espace défini par la fenêtre. Le système d'enregistrement comprenant les composants électroluminescents et le système optique peut être mis en mouvement relatif par rapport à la fenêtre, les données étant alors enregistrées colonne par colonne sur le film à rayons X.
PCT/EP1988/001205 1987-12-29 1988-12-23 Systeme d'enregistrement de donnees sur un film a rayons x place dans une cassette WO1989006377A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8703156A NL8703156A (nl) 1987-12-29 1987-12-29 Stelsel voor het registreren van gegevens op een in een cassette aangebrachte roentgenfilm.
NL8703156 1987-12-29

Publications (1)

Publication Number Publication Date
WO1989006377A1 true WO1989006377A1 (fr) 1989-07-13

Family

ID=19851164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1988/001205 WO1989006377A1 (fr) 1987-12-29 1988-12-23 Systeme d'enregistrement de donnees sur un film a rayons x place dans une cassette

Country Status (2)

Country Link
NL (1) NL8703156A (fr)
WO (1) WO1989006377A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474552A1 (fr) * 1990-09-06 1992-03-11 General Electric Cgr S.A. Système et dispositif d'impression d'informations sur films radiologiques
EP0443372A3 (en) * 1990-02-20 1992-05-27 Eastman Kodak Company Method of identifying x-ray film with patient data as well as x-ray film cassette and unloading and loading apparatus for x-ray film cassettes
DE4318899A1 (de) * 1993-06-07 1994-12-08 Agfa Gevaert Ag Verfahren und Vorrichtung zum Aufbelichten von Daten auf Röntgenfilme
DE4416736C1 (de) * 1994-05-11 1995-07-27 Agfa Gevaert Ag Datenkamera
US5453813A (en) * 1991-11-22 1995-09-26 E. I. Du Pont De Nemours And Company Patient information apparatus
WO1997024643A1 (fr) * 1995-12-29 1997-07-10 Josef Paul Graf Procede et dispositif d'identification optique d'un film

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953738A (en) * 1974-03-16 1976-04-27 Siemens Aktiengesellschaft Arrangement for the light-projection of indicia onto an x-ray film
DE2710699A1 (de) * 1977-03-11 1978-09-14 Gollwitzer Gmbh Co Kg Anordnung zum aufbelichten von kennzeichen von einem datentraeger auf einen roentgenfilm
DE2850410A1 (de) * 1978-11-21 1980-05-29 Philips Patentverwaltung Vorrichtung zur aufbelichtung von daten auf einen film in einem roentgenuntersuchungsgeraet
DE3321653A1 (de) * 1982-06-15 1983-12-15 Fuji Photo Film Co., Ltd., Minami Ashigara, Kanagawa Seitenaufdruckverfahren und apparat zur durchfuehrung des verfahrens
DE3425761A1 (de) * 1983-07-13 1985-02-07 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Seitenrandkopiervorrichtung
DE3614957A1 (de) * 1986-05-02 1987-11-05 Bernd U Dr Borckmann Vorrichtung zum aufbelichten von daten auf einen roentgenfilm
DE3633289A1 (de) * 1986-09-30 1988-03-31 Siemens Ag Zahnmedizinisches geraet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953738A (en) * 1974-03-16 1976-04-27 Siemens Aktiengesellschaft Arrangement for the light-projection of indicia onto an x-ray film
DE2710699A1 (de) * 1977-03-11 1978-09-14 Gollwitzer Gmbh Co Kg Anordnung zum aufbelichten von kennzeichen von einem datentraeger auf einen roentgenfilm
DE2850410A1 (de) * 1978-11-21 1980-05-29 Philips Patentverwaltung Vorrichtung zur aufbelichtung von daten auf einen film in einem roentgenuntersuchungsgeraet
DE3321653A1 (de) * 1982-06-15 1983-12-15 Fuji Photo Film Co., Ltd., Minami Ashigara, Kanagawa Seitenaufdruckverfahren und apparat zur durchfuehrung des verfahrens
DE3425761A1 (de) * 1983-07-13 1985-02-07 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Seitenrandkopiervorrichtung
DE3614957A1 (de) * 1986-05-02 1987-11-05 Bernd U Dr Borckmann Vorrichtung zum aufbelichten von daten auf einen roentgenfilm
DE3633289A1 (de) * 1986-09-30 1988-03-31 Siemens Ag Zahnmedizinisches geraet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443372A3 (en) * 1990-02-20 1992-05-27 Eastman Kodak Company Method of identifying x-ray film with patient data as well as x-ray film cassette and unloading and loading apparatus for x-ray film cassettes
EP0474552A1 (fr) * 1990-09-06 1992-03-11 General Electric Cgr S.A. Système et dispositif d'impression d'informations sur films radiologiques
FR2666500A1 (fr) * 1990-09-06 1992-03-13 Gen Electric Cgr Systeme et dispositif d'impression d'informations sur films radiologiques.
US5453813A (en) * 1991-11-22 1995-09-26 E. I. Du Pont De Nemours And Company Patient information apparatus
US5515137A (en) * 1991-11-22 1996-05-07 E. I. Du Pont De Nemours And Company Patient information apparatus
DE4318899A1 (de) * 1993-06-07 1994-12-08 Agfa Gevaert Ag Verfahren und Vorrichtung zum Aufbelichten von Daten auf Röntgenfilme
US5566222A (en) * 1993-06-07 1996-10-15 Agfa-Gevaert Ag - Fototechnik Method of and apparatus for exposing data on X-ray films
DE4416736C1 (de) * 1994-05-11 1995-07-27 Agfa Gevaert Ag Datenkamera
WO1997024643A1 (fr) * 1995-12-29 1997-07-10 Josef Paul Graf Procede et dispositif d'identification optique d'un film

Also Published As

Publication number Publication date
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