JPH01254943A - Cassette for photographing x-ray photograph - Google Patents

Abstract

PURPOSE:To simultaneously enable imprinting data when an X-ray photograph is photographed with a fluorescent sensitizing sheet overlapped with an X-ray film by interrupting a fluorescence by means of a data image and making the data image a non-exposed area. CONSTITUTION:A tray 12 is provided with a housing stage 13 in response to the data image area of the X-ray film, and a data sheet 14 and the fluorescent sensitizing sheet 15 are overlapped with each other and placed on the housing stage. When an X-ray photograph is photographed, the tray 12 is loaded in a cassette 1 from an window, and the data sheet 14 and the fluorescent sensitizing sheet 15 are arranged in an adjacent position corresponding to the data image area of the X-ray film 6. When an X-ray is projected in the cassette through an object, although a fluorescent sensitizing sheet exhibits a fluorescence and makes the X-ray film expose, the data sheet 14 is interposed between the X-ray film 6 and the fluorescent sensitizing sheet 15 in the data image area. Thus, the data image is transferred to the X-ray film as the unexposed area.

Description

[Detailed Description of the Invention] Natsushina Rikuri The present invention provides an X-ray method for simultaneously imprinting image data consisting of letters, numbers, etc. onto an X-ray photographic film when taking an X-ray photograph. Regarding photography cassettes.

As is well known, the wavelength of the X-ray beam is 0.1
~10, on the other hand, conventional radiographic films have inherently poor sensitivity to X-rays, as they have a high sensitivity to blue light with wavelengths of 350-510 nm.

For this reason, during X-ray photography, various intensifying screens are often superimposed on the X-ray photographic film to increase the photosensitivity of the X-ray photographic film. For example, an intensifying screen using calcium tungstate as an exacerbating agent can be
Fluorescence at a wavelength of ~550 nm is emitted to expose the radiographic film.

On the other hand, conventionally, when taking X-ray photographs of the human body or other objects,
Usually, the date of shooting, the name and gender of the person being photographed, and other necessary data are also imprinted on the film at the same time. For this purpose, conventionally, a method has been adopted in which single character type made of lead, which is difficult for X-rays to pass through, is manually arranged and attached to one corner of the film cassette. However, when using this method, the work of arranging single-character type is extremely complicated, and the amount of data for imprinting is naturally limited.

Therefore, for example, in Japanese Patent Publication No. 62-27704,
The required data is written on a piece of paper using a paste-like paint made by dispersing fine powder of lead compounds such as lead oxide, white lead, and lead sulfide in a quick-drying binder, and this is then transferred to unexposed X-ray photographic film. A method of imprinting as a region has been proposed. but,
When writing data on such paints, generally the X&? of the paint is written. ! Due to the weak shielding power, when taking X-ray photographs using high-voltage X-rays or a fluorescent intensifying screen, the data is often not clearly imprinted on the X-ray photographic film. .

On the other hand, Japanese Utility Model Publication No. 39-6332 similarly discloses that a data sheet is created by recording the required data using a paint containing heavy metals, and this data sheet is used as a predetermined sheet of X-ray photographic film after cutting out a fluorescent intensifying screen. The image forming area of the X-ray photographic film is placed on the cassette, and ultra-soft X-rays are irradiated to the image area of the X-ray photographic film via the data sheet before or after taking the X-ray photograph to form an image. A method is described in which the unexposed areas are imprinted on X-ray photographic film. According to such a method, an image can be recorded on an X-ray photographic film in a bright place, but in order to record a clear image on a film, as mentioned above, it is necessary to use ultra-soft X-rays. Therefore, it is not possible to record the data on film at the same time as the X-ray image.

Furthermore, the fluorescent paper attached to the X-ray photographic film is cut out in advance to form a predetermined data image forming area on the X-ray photographic film, and a lead plate or the like is placed on the side of the X-ray tube corresponding to this area. Using a cassette that blocks X-rays and has a window with a shutter on the back cover of the area corresponding to the data image forming area, the shutter is opened and the film surface is directly exposed in the area. A so-called name printer is also known. According to such a name printer, the shutter of the cassette is opened and, for example, the name part of the medical record is irradiated with light,
The reflected light is imaged onto the film, and the image as data can be imprinted on the X-ray photographic film.

According to such a device, data can be directly transferred from a medical record etc. onto an X-ray photographic film, so it has the advantage that there is no need to use a special data sheet, etc.
The data must be imprinted as an operation separate from the X-ray photography, and the data cannot be imprinted onto the film at the same time as the X-ray photography.

The present invention has been made in order to solve various problems in the above-mentioned conventional methods of imprinting image data consisting of characters, numbers, etc. on X-ray photographic film.
To provide a cassette capable of simultaneously imprinting data when taking an X-ray photograph by superimposing a fluorescent intensifying screen on an X-ray photographic film.

The X-ray photographing cassette according to the present invention is used to attach a fluorescent screen to an X-ray photographic film, fill it, and transmit data as an image to X'4IA when taking an X-ray photograph. A cassette for imprinting on a predetermined data image area of photographic film, in which a window provided on the side wall of the cassette, a data sheet in which data is written on a fluorescence-transparent sheet base material, and a fluorescent intensifying screen are overlapped. The data sheet is loaded into a cassette through the window so as to be freely drawn out, and the data sheet is placed adjacent to the data image area together with a fluorescent intensifying screen so as to be located on the side of the X-ray photographic film. When an X-ray photograph is taken, fluorescence is blocked in the data image and the data image is imprinted on the X-ray photographic film as an unexposed area.

The cassette according to the present invention transfers image data (hereinafter sometimes referred to as data image) to a fluorescence-transparent sheet base material when taking an X-ray photograph by overlaying a fluorescent intensifying screen on an X-ray photographic film. A data sheet containing the information is interposed between an X-ray photographic film and a fluorescence intensifying screen, and when taking an X-ray photograph, the data image is used to block fluorescence, and the data image is used as an unexposed area for X-ray photography. Used for imprinting on line photographic film.

As is well known in the technical field of X-ray photography, fluorescent intensifying screens are made by dispersing calcium tungstate or rare earth phosphors in cellulose nitrate or polyurethane resin, which are then made of cardboard or synthetic resin sheets. It consists of a stack of fluorescent films coated on a mount, and is usually used for X-ray photography in a cassette with an X-ray photographic film sandwiched therebetween. X-ray photography using such a fluorescent intensifying screen is described in detail in, for example, ``Clinical Radiology Techniques Selected Book Radiography'' (2nd edition, published by Nanzando in 1986).

The sheet base material for producing the data sheet is not particularly limited as long as it transmits fluorescence (for example, transparent or translucent paper, such as parchment paper, cellophane paper, and so-called tracing paper). Sheets and films made of polyester, polyethylene, polypropylene, polyvinyl chloride resin, cellulose acetate, etc. are preferably used.

It is convenient for use if appropriate frames and ruled lines are printed in advance on the sheet base material in order to write necessary data.

In the present invention, data as an image is written on the sheet base material using ink, coating material, etc. that blocks fluorescence. Preferably, the data is marked using oil-based or water-based marking pens, which are normally commercially available. usually,
If you write the data with a black marking ben, the handwriting has excellent fluorescence shielding properties and has a wide range.
The data is preferably clearly imprinted on the radiographic film. Although the width of the handwriting is not particularly limited, it is usually preferably 0.6n or more. However, the present invention is not particularly limited to writing instruments for writing data.

In addition, the color tone of the ink or paint is not limited to black as long as it blocks fluorescent light, and there are other colors other than black, such as red, brown, orange, etc., which can block fluorescent light. Yellow, yellow-green, etc. are also used.

Although the sheet substrate must not completely block fluorescence, it may be lightly colored in red, yellow, green, blue, purple, etc. in order to adjust the blocking of fluorescence by the data image.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The X-ray photography cassette according to the present invention will be explained in detail below based on the drawings.

FIG. 1 shows an external perspective view of a cassette 1 according to the present invention. The cassette is a box-shaped container that is opened and closed by a back M2 for loading and unloading X-ray film.

When taking a photograph, X-ray photographic film is usually loaded into a cassette with fluorescent intensifying screens pasted on both sides thereof. The cassette 1 has a space for accommodating a tray as will be described later, corresponding to a predetermined data image forming area in the loaded X-ray photographic film, and also has a window 3 on the side wall, and the tray can be inserted into the window. A light shielding means 4 is disposed in the window to prevent light from entering the cassette when the cassette is loaded into the cassette or pulled out from the cassette.

As shown in FIGS. 2 and 3, the back cover 2 of the cassette
The front plate 5 facing this is made of a material such as polyurethane in order to hold the X-ray photographic film 6 and fluorescent intensifying screens 7 and 8, which are stacked one on top of the other, in close contact with each other in a predetermined position. Elastic layer 9 and lO are attached. In normal X-ray photography, a front intensifying screen 7 is attached to the X-ray tube side of the X-ray photographic film, and a back intensifying screen 8 is attached to the opposite side.

The data image area on the X-ray photographic film onto which the data image is imprinted is usually rectangular, and the fluorescent intensifying screens 7 and 8 affixed to the X-ray photographic film correspond to the data image area. Parts are pre-cut. The cassette 1 has a space formed by a pedestal 11 between the back cover and the front plate, corresponding to a predetermined data image area in the loaded X-ray photographic film, and a tray 12 is placed in this space. It can be loaded and pulled out freely.

As shown in FIGS. 4 and 5, the tray 12
The storage stage 13 corresponds to the data image area of the line photographic film.
1. A data sheet 14 and a fluorescent intensifying screen 15 are stacked on this storage stage.

When taking an X-ray photograph, such a tray is loaded into the cassette through the window, and as shown in FIGS. 2 and 3, an The data sheet 14 and the fluorescent intensifying screen 15 are arranged so that the data sheet 14 is in close contact with the line photographic film.

FIG. 6 shows an example of the light shielding means 4 in the window 3 disposed on the side wall of the cassette, in which a light shielding band 16 with a hemispherical cross section made of a flexible elastic material such as rubber or soft resin foam is shown.
are placed along the perimeter of the window. When the tray is loaded into the cassette or pulled out from the cassette, the light-shielding band deforms along the tray and comes into close contact with it, as shown in FIG. 2, so that no light enters the cassette.

In using the cassette according to the present invention, as described above, a data sheet and a fluorescent intensifying screen are stacked on a tray, and this tray is loaded into the cassette through the window.
A data sheet and a fluorescent intensifying screen are arranged at adjacent positions corresponding to the data image area of the X-ray photographic film so that the data sheet is in close contact with the X-ray photographic film.

Therefore, when X&1 is irradiated into the cassette through the subject, the fluorescent intensifying screen emits fluorescence according to the amount of irradiation and exposes the X-ray photographic film, but in the data image area, Since a data sheet is interposed between the radiographic film and the fluorescent screen and the data image on the data sheet shields the fluorescence, the data image is transferred to the radiographic film as an unexposed area and thus After the film is developed, the image is imprinted onto the X-ray photographic film as a so-called white area.

Furthermore, as described above, according to the X-ray photography cassette of the present invention, data sheets can be loaded into the cassette in a bright place, and data images can be captured at the same time as X,* photography. It can be imprinted on X-ray photographic film.

Furthermore, when an X-ray photograph is taken, the image is originally projected onto the X-ray photographic film as an unexposed area that blocks the fluorescence of a fluorescent intensifying screen that helps expose the X-ray photographic film, so the image is clear.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an X-ray photography cassette according to the present invention, and FIG. 2 is a sectional view taken along line A-A in FIG. 1.
Figure 3 is a sectional view taken along line B-B in Figure 1;
The figure is a perspective view showing the tray, FIG. 5 is a sectional view taken along the line C-C in FIG. It is a diagram. 1...Cassette for X-ray photography, 3...Window, 6...
- X-ray photographic film, 7 and 8... Fluorescent intensifying screen, 9 and 10... Elastic layer, 12... Tray, 13... Storage stage, 14... Data sheet, 15... Fluorescent intensifying screen, 16...shading zone. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6

Claims (2)

[Claims] (1) A cassette for attaching and filling an X-ray photographic film with a fluorescent intensifying screen to imprint image data onto a predetermined data image area of the X-ray photographic film when taking an X-ray photograph; A window arranged on the side wall of the cassette, a data sheet with data written on a fluorescence-transparent sheet base material, and a fluorescent intensifying screen are placed one on top of the other, and the cassette is freely drawn out and loaded through the window. , the above data sheet is
It has a tray that can be placed adjacent to the data image area together with a fluorescent intensifying screen so as to be located on the radiographic film side, and blocks fluorescence in the data image when taking an X-ray photograph. The cassette is characterized in that the data image is imprinted onto an X-ray photographic film as an unexposed area. (2) The cassette according to claim 1, wherein the window is provided with a light shielding means.