CN111920443A - Built-in wall type light field indicator for dental film machine - Google Patents
Built-in wall type light field indicator for dental film machine Download PDFInfo
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- CN111920443A CN111920443A CN202010797643.9A CN202010797643A CN111920443A CN 111920443 A CN111920443 A CN 111920443A CN 202010797643 A CN202010797643 A CN 202010797643A CN 111920443 A CN111920443 A CN 111920443A
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- A61B6/51—
Abstract
The invention discloses a built-in wall type optical field indicator for a dental film machine. Therefore, before the dental film machine is used for carrying out X-ray shooting, the visible light is firstly used for clearly positioning the position to be shot, an operator is helped to quickly and clearly determine the area irradiated by the X-ray according to the light field of the visible light, whether the area is the required shooting area is visually confirmed, and the possibility that the focusing view is incorrect and the shooting is forced to be reworked and carried out again when the X-ray shooting is directly carried out is reduced. The technical scheme of the invention has simple and reliable structure, small change to the existing equipment and obvious indication to the X-ray visual field.
Description
Technical Field
The invention relates to the technical field of oral and maxillofacial images, in particular to a built-in wall type light field indicator of a dental film machine for projecting an apical film.
Background
In the diagnosis and treatment of stomatology, an X-ray dental machine is a common device. X-ray dental machines are generally constructed with a bulb tube for generating X-rays, fitted with a cylindrical mask. The X-ray emitted by the bulb tube is irradiated on the face of a patient in a conical or cylindrical shape from the ray shielding cylinder, the closer the bulb tube is, the smaller the irradiation field is, and the farther the bulb tube is, the larger the irradiation field is. In clinical use, a doctor places a film on the inner face of teeth in the oral cavity of a patient, then adjusts the direction angle of the wire shielding cylinder, so that the outlet of the wire shielding cylinder is aligned with the tooth surface to be shot, and the central line of the wire shielding cylinder is vertically opposite to the central position of the film, thereby preventing the deformation of the shot tooth image and ensuring that the projection field covers all the tooth surface to be shot.
However, although the X-ray projection technique of the dental film machine is exact in principle, in practice, the X-ray projection technique only depends on the alignment of the wire shielding cylinder, and the X-ray projection technique is poor in executable degree. Because the X-ray is invisible light, it is impossible to measure and predict in actual use, and in actual operation, the executable degree of the alignment by the mask is poor, and there is no clear indication light field, so there will be great deviation in clinical practice and execution, and the lack of standardization and theoretical rigor of clinical practice is insufficient.
In addition, because the film receiving the X-ray needs to be placed in the patient's mouth, it is difficult to display the X-ray results in real time by using a digital technique. Moreover, positioning shooting can be carried out after the X-ray shooting effect is displayed in real time, and the problem of X-ray radiation quantity can also exist. Therefore, at least a disposable chemical film is still used as a photographic negative film at present.
In practice, after the film is placed in the mouth of a patient and the teeth are occluded or the lips are closed, the doctor can subjectively judge whether the center line is perpendicular to the tooth surface or the film, whether the center of the film is aligned, and whether the projection field of the X-ray accurately covers the tooth surface to be photographed, only by experience. The inspection of the shot image can only be realized by developing the negative after the actual shooting is finished, and whether the image on the negative is correct or not can be known. Moreover, if there is a discrepancy, a new radiographing may be necessary, which increases the working time and the amount of X-ray radiation to which the patient is exposed.
In particular, in X-ray apex examination of the oral jaw face, two major techniques are currently commonly employed: a split-angle line projection technique and a parallel projection technique. However, from the current standard and technical method and the current design of the dental film machine, the doctor can not accurately identify the projection field of the X-ray in the process of carrying out the dental film projection, and the analysis is as follows:
firstly, a dividing line projection technology:
in the technique of apex X-ray radiography of the Chinese people's republic of China health industry standard (WS/T608-.
In the projection direction of the technique, the guideline recommendations are located on the body surface as follows:
a) when the upper teeth are shot, a connecting line from the upper edge of the mouth of the external auditory canal to the tip of the nose is taken as an imaginary connecting line, and the passing positions of the central line of the X-ray are respectively 1) the upper incisor is shot to pass through the tip of the nose; 2) when the upper unilateral middle incisor and the lateral incisor are projected, the middle point of the connecting line of the nose tip and the projection side nose wing is passed; 3) when the upper single cuspid tooth is shot, the lateral nasal alar is shot;
b) when the mandibular teeth are photographed, the X-ray center lines are all on an imaginary line 10mm above the inferior border of the mandibular teeth, and are then directed at the site of the examined teeth.
From the above-mentioned regulations on the projection technique of the angular bisector of the anterior teeth of the upper and lower jaws, it can be seen that these operation specifications are used to position the spatial position of the teeth in a manner of estimating and predicting by aiming at the external soft tissue body surface marks, and there is no way to accurately position the projection position, projection direction and projection angle before photographing by using the wire shielding tube of the bulb tube to roughly correspond to the body surface marks in the actual clinical operation. Such techniques undoubtedly introduce significant errors and uncertainties to the clinical images. The randomness and uncertainty of the projection fix positioning of the body surface does not really show the essence and connotation of the angular bisector technique.
Parallel projection technique for two or root tip slices
The parallel projection technology of the apex sheet is also called as a right angle technology, a long shading cylinder technology or a long focus parallel projection technology. The basic projection principle is to place the X-ray film parallel to the tooth long axis and to make the X-ray central line perpendicular to both the tooth long axis and the film. The advantage of obtaining such an image is theoretically that the dental image has a small degree of distortion with the deformation of the tooth, and when the film is placed, the film has to be moved slightly away from the target tooth in order to ensure that the film is parallel to the long axis of the tooth. Meanwhile, high voltage is adopted and a fast film is used, so that the exposure time is shortened, and the exposure is reduced. However, this method is often used in experimental projection, which is not suitable for clinical application, and requires necessary auxiliary tools for projection. The time is long, a large space in the oral cavity is needed for the dental film to be in place, and in the actual clinical operation, it can be seen that in most cases, due to the inclination of the teeth, the form and thickness factors of the peripheral soft tissues (tongue body, oral floor and palate) and the bone tissues (alveolar bone and faucial arch) and the size of the oral cavity volume, the parallel relation between the long axis of the teeth and the film cannot be formed even in the oral cavity volume, and the matching difficulty of the patient is large, so that the failure is caused. It is theoretically possible, but only partially valuable in practical clinical work.
Thus, the prior art is subject to further improvements and enhancements.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a built-in wall light field indicator for a dental film machine that provides quick and unambiguous positioning of a position directly opposite and to be photographed when the dental film machine is used to photograph a patient's teeth.
In order to achieve the purpose, the invention provides a built-in wall type optical field indicator for a dental film machine, which comprises a cylindrical light column box connected to a shade tube, wherein at least one visible light source is arranged on the cylindrical inner wall surface of the light column box, and the visible light source emits visible light and emits the visible light from a light outlet along the cylindrical inner wall surface; the visible light is irradiated to the region to be photographed in parallel in correspondence with the opening of the mask barrel.
Preferably, the light column box is detachably fixed at the opening of the wire shielding barrel; the central line of the light beam box coincides with the central line of the line shading cylinder, and the inner diameter of the light beam box is equal to that of the line shading cylinder.
More preferably, a reflector is disposed in the cylindrical inner wall surface, the reflector being disposed obliquely, and an imaging position of the visible light source on the reflector coincides with a position of an X-ray source in the dental film machine in a radial direction of the cylindrical inner wall surface.
Further preferably, the mirror surface of the reflector is disposed at an included angle of 45 degrees with the inner wall surface of the cylinder shape, and faces the light outlet; the visible light source set up in the mirror surface with on the interior lateral wall face between the light-emitting window, just the visible light source is in virtual image that becomes in the reflector panel is located hide an open-ended within range of a line section of thick bamboo.
Preferably, the light outlet cover is combined with a transparent lampshade, and the transparent lampshade has an anti-glare function.
More preferably, the center of the transparent lampshade is decorated with a shading mark, and the mark is used for marking the center of the light field.
Preferably, a magnetic structure is arranged at the bottom end, opposite to the light outlet, of the light column box, and the light column box is fixed at the opening through the magnetic structure in an adsorption manner.
Preferably, the visible light source is an LED lamp.
Preferably, an infrared sensing area is arranged at the edge of the light outlet and used for sensing the position of a human body and controlling the visible light source to emit light.
The invention also discloses a working method of the built-in wall type light field indicator, which comprises the following steps:
a. fixedly connecting the light column box to the wire shielding cylinder;
b. opening a switch of the light pillar box, wherein a light outlet of the light pillar box emits visible light;
c. adjusting the position and the angle of the line shielding cylinder according to the light field of visible light, and enabling the line shielding cylinder to be opposite to the center of a region to be shot;
d. an X-ray photographing operation is performed.
Preferably, the light column box is detachably connected to the wire shielding barrel, and before the step d, the method further comprises the steps of:
cc. disassembling the light beam box.
The built-in wall type optical field indicator for the dental film machine is characterized in that a cylindrical light column box is connected to a shading cylinder, a visible light source is arranged on the cylindrical inner wall surface of the light column box, and visible light and an opening of the shading cylinder are coincided and irradiated to a region to be shot in parallel. Therefore, before the dental film machine is used for carrying out X-ray shooting, the visible light is firstly used for clearly positioning the position to be shot, an operator is helped to quickly and clearly determine the area irradiated by the X-ray according to the light field of the visible light, whether the area is the required shooting area is visually confirmed, and the possibility that the focusing view is incorrect and the shooting is forced to be reworked and carried out again when the X-ray shooting is directly carried out is reduced. The technical scheme of the invention has simple and reliable structure, small change to the existing equipment and obvious indication to the X-ray visual field.
Drawings
FIG. 1 is a schematic perspective view of a built-in wall type optical field indicator for a dental film machine according to the present invention after installation;
FIG. 2 is a schematic axial sectional view of a built-in wall type optical field indicator for a dental film machine of the present invention;
FIG. 3 is a schematic view of the illuminated field of view of the built-in wall field indicator for a dental film machine of the present invention;
fig. 4 is a flow chart of the operation of the built-in wall type optical field indicator for dental film machine of the present invention.
In the figure: 1-a source of visible light; 2-a light pillar box; 3-a reflector, 4-a switch, 5-an X-ray source, 6-a line shading cylinder, 7-a transparent lampshade, 8-a shading mark, 9-a magnetic structure, 10-an infrared sensing area, 11-an area to be shot and 12-a light field.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, the wall type light field indicator of the present invention comprises at least one visible light source 1, which is disposed on the cylindrical inner wall surface of a cylindrical light column box 2, when in use, the light column box 2 is fixedly connected to a shade tube 6, a switch 4 is turned on, the visible light source 1 emits visible light, and the visible light directly or indirectly emits the visible light from a light outlet along the cylindrical inner wall surface and irradiates an area to be photographed 11, such as the face, the lips, and the cheek portion facing the outside of the teeth of a patient. The visible light source 1 may be only one, and a part of the emitted light directly irradiates the region to be photographed 11 along the inner wall surface, or a plurality of visible light sources may be separately provided along the circumferential direction of the inner wall surface, so that when the light irradiates the region to be photographed 11 along the inner wall surface, a circular light spot is shown, and the photographing range corresponding to the mask 6 is indicated more closely.
In order to ensure that the light field 12 of the visible light coincides with the imaging light field of the X-ray, it is necessary to ensure that the visible light is irradiated in parallel to the region to be imaged 11 in correspondence with the opening of the mask 6.
Specifically, the light column box 2 may be detachably fixed to an opening of the shade cylinder 6; the center line of the light beam box 2 coincides with the center line of the shade tube 6, and the inner diameter of the light beam box 2 is equal to the inner diameter of the shade tube 6. I.e. the beam box 2 now corresponds to an extension of the mask 6.
In a more preferred embodiment, as shown in the cross-sectional view of fig. 2, a reflector 3 is disposed in an inclined manner inside the cylindrical inner wall surface of the light pillar box 2, the visible light source 1 is located on the reflective surface of the reflector 3, and a part of the visible light emitted from the visible light source 1, which is irradiated to the deep part of the mask 6, is irradiated to the reflector 3, reflected and emitted from the light outlet. That is, the reflector 3 makes all the visible light emitted from the visible light source 1 exit from the light exit along the inner side wall surface, so as to form a circular light spot having a shape consistent with the cross-sectional shape of the inner side wall surface, and at the same time, because the inner diameter of the light column box 2 is equal to the inner diameter of the mask tube 6, the shape of the circular light spot is consistent with the opening shape of the mask tube 6, that is, the mask tube 6 is extended to the region 11 to be photographed, as shown in fig. 3, a light field 12 visible to an operator is provided on the region 11 to be photographed, which is very convenient for the operator to adjust focusing.
Considering that the light field 12 should coincide with the X-ray imaging field, the imaging position of the visible light source 1 on the reflector 3 coincides with the position of the X-ray source 5 in the dental film machine in the radial direction of the cylindrical inner wall surface. Of course, it is better that the imaging position of the visible light source 1 completely coincides with the position of the X-ray light source 5, so that it can be ensured that the light field 12 completely coincides with the X-ray photographing light field regardless of the distance from the region 11 to be photographed.
Specifically, the mirror surface of the reflector 3 may be placed at an angle of 45 degrees with the cylindrical inner wall surface, and the mirror surface faces the light outlet; the visible light source 1 is disposed on the inner wall surface between the mirror surface and the light outlet, and a virtual image of the visible light source 1 in the reflector 3 is located within the opening range of the shade tube 6.
The reflector 3 is transparent to X-rays. Namely, the reflector 3 is installed, and the X-ray emitted by the X-ray source 5 positioned in the bulb is completely not influenced to irradiate the area 11 to be shot through the ray shielding cylinder 6.
In a better embodiment, an infrared sensing area 10 is provided at the edge of the light outlet, where the visible light is not or hardly blocked, and includes an infrared emitting tube for emitting infrared rays and an infrared receiving tube for receiving infrared rays, so as to sense the position of the human body and control the visible light source 1 to emit light. Specifically, when a certain part of the human body, such as a hand or a face, enters an area irradiated by the infrared rays emitted from the infrared ray emitting tube and an infrared ray sensing range, specifically, 20cm in front, part of the infrared rays are reflected and received by the infrared ray receiving tube, and after the relevant processing, a signal is sent to control the visible light source 1 to emit light, for example, for 30 seconds. Accordingly, if the human body leaves the infrared sensing range, the visible light source 1 does not emit light. The specific implementation of the infrared sensing area 10 is a common technology and will not be described in detail here.
In a better embodiment, a transparent lampshade 7 is covered at the light outlet, and the anti-dazzle function is realized. Thereby further guaranteeing the accuracy of shooting focusing.
Further, it is preferable that a light shielding mark 8, for example, a + symbol in fig. 3, may be attached to the center of the transparent cover 7, so that when visible light is irradiated onto the region to be photographed 11, the light shielding mark 8 may display a shadow in the center of the light field 12 to identify the center position of the light field 12. Thereby being more convenient for the operator to adjust the position and the angle of the thread shielding cylinder 6 so as to be completely opposite to the central position of the film.
Because the light column box 2 is installed to help adjust the angle and position of the position shading cylinder 6 before the X-ray shooting, and the X-ray view can be affected during the shooting, the light column box should be taken down, and for the convenience of installation and disassembly, a magnetic structure 9 can be installed to help the installation and fixation on the bottom end of the light column box 2 opposite to the light outlet, because the shading cylinder 6 is usually made of iron material, the light column box 2 can be fixed through magnetic adsorption, and the disassembly is also convenient. If the wire covering cylinder 6 is not made of iron material, another set of magnetic structure with opposite polarity can be fixed in advance at the opening of the wire covering cylinder 6.
Considering that the volume of the visible light source 1 cannot be too large and the illuminance needs to be high, an LED lamp as a cold light source is preferable. So that the heating is not too high.
The working method of the built-in wall type light field indicator disclosed by the invention comprises the following steps as shown in figure 4:
a. fixedly connecting the light column box 2 to the wire covering cylinder 6;
b. the switch 4 of the light pillar box 2 is opened, and the light outlet of the light pillar box 2 emits visible light;
c. according to the light field 12 of visible light, the position and the angle of the line shielding cylinder 6 are adjusted to be opposite to the center of the area 11 to be shot;
d. an X-ray photographing operation is performed.
And, in a better embodiment, the light column box 2 is detachably connected to the wire-covering cylinder 6, and before said step d, the method further comprises the steps of:
cc. the light beam box 2 is disassembled. Thereby preventing the column box 2 from blocking the X-rays.
In summary, in the built-in wall type optical field indicator for dental film machine of the present invention, the light beam box 2 is connected to the mask tube 6, and the visible light source 1 is disposed on the inner wall surface of the light beam box 2, so that the visible light is irradiated to the region 11 to be photographed in parallel with the opening of the mask tube 6. Therefore, before the X-ray photographing is carried out by using the dental film camera, the visible light is firstly used for clearly positioning the position to be photographed, the operator is helped to quickly and clearly determine the region irradiated by the X-ray according to the light field 12 of the visible light, and whether the region is the required photographing region is visually confirmed, so that the possibility that the focusing view is incorrect and the photographing is forced to be reworked to be carried out again when the X-ray photographing is directly carried out is reduced. The technical scheme of the invention has simple and reliable structure, small change to the existing equipment and obvious indication to the X-ray visual field.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A built-in wall type optical field indicator for a dental film machine is characterized by comprising a cylindrical light column box connected to a shading cylinder, wherein at least one visible light source is arranged on the cylindrical inner wall surface of the light column box, emits visible light and is emitted from a light outlet along the cylindrical inner wall surface; the visible light is irradiated to the region to be photographed in parallel in correspondence with the opening of the mask barrel.
2. The built-in wall type light field indicator according to claim 1, wherein said light pillar box is removably secured to said opening of said shade cartridge; the central line of the light beam box coincides with the central line of the line shading cylinder, and the inner diameter of the light beam box is equal to that of the line shading cylinder.
3. The built-in wall type optical field indicator according to claim 2, wherein a reflector is obliquely arranged in the inner wall surface of the cylinder, and the imaging position of the visible light source on the reflector coincides with the position of the X-ray source in the dental film machine in the radial direction of the inner wall surface of the cylinder.
4. The built-in wall type light field indicator according to claim 3, wherein the mirror surface of the reflector is disposed at an angle of 45 degrees with the inner wall surface of the cylindrical shape, facing the light outlet; the visible light source set up in the mirror surface with on the interior lateral wall face between the light-emitting window, just the visible light source is in virtual image that becomes in the reflector panel is located hide an open-ended within range of a line section of thick bamboo.
5. The built-in wall type optical field indicator according to claim 2, wherein said light exit cover incorporates a transparent cover, said transparent cover having an anti-glare function.
6. The light field indicator of claim 5, wherein the center of the transparent lampshade is decorated with a light-blocking mark for identifying the center of the light field.
7. The built-in wall type light field indicator according to claim 2, wherein a magnetic structure is disposed on a bottom end of the light pillar box opposite to the light outlet, and the light pillar box is fixed to the opening by the magnetic structure.
8. The indicator as claimed in any one of claims 1 to 7, wherein an infrared sensing area is disposed at the edge of the light outlet for sensing the position of the human body and controlling the visible light source to emit light.
9. The method of operating a built-in wall light field indicator as claimed in any one of claims 1 to 8, comprising the steps of:
a. fixedly connecting the light column box to the wire shielding cylinder;
b. opening a switch of the light pillar box, wherein a light outlet of the light pillar box emits visible light;
c. adjusting the position and the angle of the line shielding cylinder according to the light field of visible light, and enabling the line shielding cylinder to be opposite to the center of a region to be shot;
d. an X-ray photographing operation is performed.
10. The method of claim 9, wherein said light pillar box is removably attached to said mask barrel, and further comprising, prior to said step d, the steps of:
cc. disassembling the light beam box.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010797643.9A CN111920443A (en) | 2020-08-10 | 2020-08-10 | Built-in wall type light field indicator for dental film machine |
| PCT/CN2020/126050 WO2022027842A1 (en) | 2020-08-07 | 2020-11-03 | Visible light projection indicator for dental x-ray device and method for using same |
| US18/106,772 US20230263486A1 (en) | 2020-08-07 | 2023-02-07 | Visible light projection indicator for dental x-ray imaging apparatus and method of using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010797643.9A CN111920443A (en) | 2020-08-10 | 2020-08-10 | Built-in wall type light field indicator for dental film machine |
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| Publication Number | Publication Date |
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| CN111920443A true CN111920443A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010797643.9A Pending CN111920443A (en) | 2020-08-07 | 2020-08-10 | Built-in wall type light field indicator for dental film machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2603014A (en) * | 2021-05-27 | 2022-07-27 | Dexcowin Co Ltd | Apparatus for marking irradiation area for hand-held x-ray device |
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