JPH04294344A - Method for marking film of x-ray apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to a method for forming markings on X-ray film.

0002

BACKGROUND OF THE INVENTION Markings of information normally recorded on X-ray film, such as patient personal data and information regarding diagnosis, imaging procedures and filing, are made manually or designed for that specific purpose. This is done by a separate device. One possible procedure for manual marking is to write the required data on an adhesive tape and apply this tape to the film after imaging. Marking can also be done by writing the necessary data on lead tape and attaching this tape to the surface of the cassette. In this way, the text written on the lead tape is projected onto the x-ray film during the imaging process and becomes visible during development of the film. A problem with these known prior art marking methods is that they are time consuming and have a large margin for error.

When using separate marking devices known in the art, the data is first written on paper and the text is projected by a light projector included in the device onto the photographed and undeveloped film. . The markings become visible during development. This type of marking device is
Although it is placed in a dark room together with the developing device, there is a risk that the marking data will be mixed up because data entry and marking are done in separate locations.

0004

SUMMARY OF THE INVENTION It is an object of the present invention to mark patient-related information together with other necessary data on a film using X-ray imaging in a manner that eliminates the drawbacks of the above-mentioned marking methods. An object of the present invention is to provide a method and apparatus for doing so.

[0005]

SUMMARY OF THE INVENTION The device of the present invention has a liquid crystal display element mounted inside a film cassette, the screen of the display element touching the surface of the film, and the markings on the opposite side of the display screen. Alternatively, the film cassette may be provided with a marking window which does not transmit daylight or room light but which allows marking by an intense light source having a suitable wavelength. It is characterized by

One advantage provided by the marking method of the invention is that, for example, the marking can be applied during imaging to
Or it can be done, for example, immediately after imaging. The embodiment with the display element has the further advantage that it does not contain moving parts and therefore has a simple construction. On the contrary, in the embodiment with the marking window, the film cassette has a very simple and favorable construction and does not require any adapter or connector between the cassette and the imaging device. Another advantage obtained by both of the above embodiments is that these methods can be used in dental imaging devices, where the film moves relative to the x-ray during imaging, and in dental imaging devices, where the film is stationary during imaging. This is applicable to both conventional X-ray equipment.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

According to FIG. 1, a preferred embodiment of the invention comprises a liquid crystal display element 1 having a display screen 2 and a light source 3 behind it. The liquid crystal display element 1 is attached to a lid 5 contained in a film cassette 4.
When closed, the display screen 2 of the liquid crystal display element 1 is fixed to the lid 5 so as to come into pressure contact with the film 6. The liquid crystal display element 1 is attached to the lid 5 in a flexible manner such that the liquid crystal display element 1 itself moves slightly to come into closer contact with the film 6. The operating voltage and marking data are introduced into the film cassette 4 via the adapter 7 from the imaging device. The data to be marked is displayed on the display screen by electrical control, and the marked data is displayed by flashing the light source.
A mark image is exposed on the film such that the image is projected onto the film, thereby exposing the area surrounding the mark while leaving the area of the film corresponding to the marking unexposed. The markings become visible when the film 6 is developed.

FIGS. 2 and 3 show another embodiment of the invention. This embodiment is equipped with a film cassette 4, and the lid 5 or main body of this film cassette 4 includes:
An opening is provided for mounting the marking window 10. The marking window 10 is in contact with the surface of the film 6. The marking is carried out by means of a powerful light source 12, which can be, for example, a diode laser, a photodiode, a halogen lamp or a similarly powerful light source. The light beam 13 is preferably sharply focused onto the film 6 by a lens 11. light source 12
is preferably attached to an imaging device. The mark forming beam 13 from the light source 12 is directed to the mirror 1 as shown in FIG.
4, or the entire light source 12 can be directed onto the film by mechanisms 8, 9 (FIG. 3), or a combination thereof. The marking is
It is formed by on/off control of the light beam by switching the light beam at a desired position.

Preferably, the timing and control of the marking means of the marking device is performed by a microcomputer. Patient-related inputs can be made, for example, via an external keyboard.

In the method of the invention, the patient-related data and other necessary data are recorded in the memory of the microcomputer, for example by means of an external keyboard, and then the markings on the film are recorded, for example after imaging, in the memory of the microcomputer. can be executed under the control of The mark can be formed, for example, as a dot matrix with a size of 5×7. The polarization towards the text shown in the example of FIG. 3 is performed by a motor 15 and a screw/nut combination 16 driven by this motor.

[Brief explanation of drawings]

1 is a cross-sectional view of a film cassette loaded with display elements; FIG.

FIG. 2 is a sectional view of a film cassette in which a marking window is provided and the light beam is polarized by a mirror;

FIG. 3 is a sectional view of a film cassette in which a marking window is provided and the light beam is polarized by a mechanism;

[Explanation of symbols]

1 Liquid crystal display element 2
Display screen 3 light source
4 Film cassette 6 Film
7 Adapter 8, 9 Mechanism
10 Marking window 12 Powerful light source
13 Ray 14 Mirror

Claims (7)

[Claims] Claims: 1. Patient-related information and other necessary data are placed in a certain area of the film (6) in the cassette (4) during X-ray photography and visually observed during the development of the film (6). A method for marking as a latent image such that a display screen (2) is a film (
6) and mounted inside the cassette (4) in such a way that markings are exposed onto the film by a light source (3) located behind said display screen (2); (1), or
It is mounted inside a cassette (4) provided with an aperture fitted with a marking window (10) that does not transmit daylight wavelengths, and the film (6) inside the cassette is exposed to daylight or room light. Said marking is carried out by a liquid crystal display element (1) adapted to prevent the marking from occurring by means of a light beam (13) generated by an intense light source (12) which can be transmitted through said marking window (10). A method characterized in that: 2. Method according to claim 1, characterized in that the marking is produced using a liquid crystal display (1) provided with a background light exposing the marking. 3. The method of claim 1, wherein the cassette (
4) The method characterized in that the operating voltage and marking data required by the display element (1) contained in 4) are conveyed from the imaging device to the film cassette (4) via an adapter (7). 4. The method according to claim 1, wherein the film cassette (4) is provided with a marking window (10), and the marking window does not transmit daylight or room light, but transmits light at a suitable wavelength. A powerful light source with (12)
A method characterized in that it makes it possible to expose a marking to a film (6) by means of a method. 5. The method of claim 1, wherein the marking is formed by a diode laser, photodiode, halogen lamp or any other powerful light source (12), and the light beam of the light source is in the form of dots. A method characterized by being focused. 6. A method as claimed in claim 1, characterized in that the marking window (10) comprises an optical filter or a cold-light mirror that does not transmit light of a wavelength that readily exposes the film (6). 7. The method of claim 1, wherein the mark-forming light beam (13) is controlled optically, preferably by a mechanism (8, 9) or by a mirror (14), to produce a marking. How to characterize it.