CN111920442A - External visible light projection positioner for dental film machine and use method thereof - Google Patents
External visible light projection positioner for dental film machine and use method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 30
- 239000011324 bead Substances 0.000 claims abstract description 14
- 210000000214 mouth Anatomy 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 description 20
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000013013 elastic material Substances 0.000 description 3
- 210000004283 incisor Anatomy 0.000 description 3
- 239000011049 pearl Substances 0.000 description 3
- 210000004872 soft tissue Anatomy 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 210000001847 jaw Anatomy 0.000 description 2
- 238000002601 radiography Methods 0.000 description 2
- NOQGZXFMHARMLW-UHFFFAOYSA-N Daminozide Chemical compound CN(C)NC(=O)CCC(O)=O NOQGZXFMHARMLW-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 210000003464 cuspid Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000000613 ear canal Anatomy 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003254 palate Anatomy 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- 238000004846 x-ray emission Methods 0.000 description 1
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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
- A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
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Abstract
The invention discloses a dental film machine external visible light projection locator, relating to the technical field of oral and maxillofacial images, comprising: the light source comprises a plurality of lamp beads, and the lamp beads emit visible light; the base, annular fretwork in the middle of the base, the light source is installed one side of base. According to the invention, the light source adopts the combination of two visible lights, so that the projection direction and the projection area range can be determined, the accurate positioning of the shooting position is achieved, and the problem of fuzzy fixed point positioning when shooting the oral cavity apex film in the traditional sense is solved.
Description
Technical Field
The invention relates to the technical field of oral and maxillofacial images, in particular to a dental film machine external visible light projection positioner and a using method thereof.
Background
The whole body medical image examination comprises chest radiography, X-ray radiography of four limbs and the like, and all the used equipment comprises visible light beam devices. The visible beam light serves to shrink the beam. Firstly, turning on a lamp on the beam splitter, adjusting knobs in two directions of X, Y of the beam splitter to enable light of the beam splitter to irradiate on a film box of a machine, enabling the size of a light field to be just consistent with the size of a film, and then shooting. When the X-ray field and the light field are adjusted to have extremely small deviation, the light field plays a role in simulating the invisible X-ray field.
The oral cavity maxillofacial region image technology relates to the projection of an apex piece, and the projection technology of the apex piece in the prior art mainly comprises a partial angle line projection technology and a parallel projection technology.
(I) angle-dividing line projection technique
In the oral cavity and jaw face image technology of X-ray photography of a cusp film in the technology of projecting the cusp film in the mouth, the description shows that the diagonal projection technology is the most important and the most commonly used technology in the technology of projecting the cusp film in the mouth in the Chinese people's republic of China health Committee (WS/T608 + 2018) oral cavity and jaw face X-ray inspection operation specification (2018-05-10, 2018-11-01 implementation) published by the national health Committee of the people's republic of China. The technique requires that the X-ray centerline be perpendicular to the bisector of the angle between the long axis of the tooth being examined and the image receptor.
In the projection direction of the diagonal projection technique, the body surface positions suggested by the above operation specifications are as follows:
a) when the maxillary 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 parts of the central line of the X-ray are respectively as follows: 1) projecting the upper and middle incisors 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.
(II) parallel projection technique
The parallel projection technique is also called a right angle technique, a long mask tube technique or a long focus parallel projection technique. The basic projection principle of the parallel projection technology is that the X-ray film is placed in parallel with the tooth long axis, and the X-ray central line is perpendicular to both the tooth long axis and the film during projection. Theoretically, the advantage of such an image acquisition is that the degree of distortion between the dental image and the tooth is small, but 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, since a high voltage is used and a fast film is used, the exposure time is reduced and the exposure amount is lowered.
However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
the line-of-branch projection technology is theoretically established, but in the process of clinical operation, because the X-ray is invisible light, the projection position, the projection direction and the projection angle cannot be accurately positioned before shooting. When the projection direction is determined and the projection is positioned at a fixed point, the contents recorded in textbooks and national standards refer to the body surface marks of the soft tissues of the face of a patient, and the space positions of the teeth are estimated and predicted by aligning the external soft tissue body surface marks through the wire shielding cylinder of the bulb tube. And because the X-ray central line is not perpendicular to the tooth long axis and the film (image imaging plate) during projection, the direction of the X-ray central line is adjusted according to an imaginary angular bisector, which is often inaccurate, and the photographed tooth image is often distorted and deformed, which undoubtedly brings great errors and uncertainty to clinical images. Because of the unstable image quality brought by non-accurate projection, the photographed tooth image is too long and too short, which brings hidden troubles to clinical treatment.
In the parallel projection technique, the X-ray center line is perpendicular to the film surface, and is no longer perpendicular to an imaginary line as compared with the diagonal projection technique, and therefore, is technically easy to ensure. However, the technique of parallel projection of the apex film is theoretically perfect, so that the implementation is quite careless, the technique is limited by the size of the oral cavity of a patient, the operation cannot be performed, and most of the cases can theoretically reach the situation that when the image plate is parallel to the long axis of the tooth, the position of the image plate at the moment is strayed out of the oral cavity. Moreover, the parallel projection technique is often used in experimental projection, and is a projection method which is not suitable for clinical use. The technology needs necessary auxiliary tools and is long in time consumption, a large intra-oral space is needed for positioning the dental film, and in most cases of actual clinical operation, due to the inclination of teeth, the shapes and thickness factors of surrounding soft tissues (a tongue body, a mouth bottom and a palate part) and bone tissues (an alveolar bone and a faucial arch) and the size of an oral cavity volume, the parallel relation between a tooth long axis and the film cannot be formed in the oral cavity volume, and the matching difficulty of a patient is high, so that the failure is caused. Thus, while parallel projection techniques are theoretically possible, they are only partially valuable in practical clinical work.
Generally, in the process of projecting the apex film, the projected part is the tooth. Regardless of the operation according to the operation specification or the projection method adopted in the actual operation, when the bulb tube shading cylinder positions the body surface marks, the fuzzy fixed-point positioning is carried out by adjusting the bulb tube shading cylinder through the body surface marks of the patient, and the problem of lack of accurate reference and marking exists. Meanwhile, since X-rays are invisible light beams, the irradiation area thereof cannot be evaluated.
The X-ray emitted by the dental film machine bulb tube is irradiated on the face of a patient in a conical or cylindrical shape from the wire shading cylinder, the closer the bulb tube is, the smaller the irradiation field is, and the farther the bulb tube is, the larger the projection field is. Because the regional unable accurate location of throwing of X ray, often can appear increasing the bulb distance, lead to the projection area increase for other irradiated areas receive unnecessary radiation, and when the bulb was close with patient's facial distance, the position skew of throwing will appear again, throw on the dental lamina and throw the phenomenon that the exposure partially appears totally.
Accordingly, those skilled in the art have sought to develop an external visible light projection positioner for a dental film machine that facilitates accurate positioning of the dental film machine bulb so that the dental film is fully exposed while minimizing unnecessary radiation.
Disclosure of Invention
When taking a dental film, generally, a round cylindrical shading cylinder connected with a bulb tube is adjusted, the shading cylinder is aimed at a part of a patient to be taken to shoot, and the specific area of the shot is the same as the X-ray radiation area. However, since the X-ray is invisible, the medical staff can only project according to the angular line projection technology or the parallel projection technology during projection, but the direction, the size and the range of the X-ray cannot be accurately estimated, and it is impossible to know whether the X-ray completely and effectively irradiates the dental film and whether the photographed dental film is distorted and deformed before the photographing result is obtained.
In view of the above defects in the prior art, the embodiment of the present invention provides a dental film machine external visible light projection positioner, which solves the problem that the positioning and fixing points in the clinical process of the existing apex film projection technology are not accurate enough.
According to the embodiment of the invention, the specific projection position and direction are determined by projecting the light in the visible annular light area of the face of the patient, so that the projection angle can be determined by the apex patch projection technology on the basis of a specific reference object, and the method is favorable for clinical teaching and actual operation.
Specifically, the embodiment of the invention uses a dental film machine external visible light projection positioner as an accessory component of X-ray inspection equipment, and mainly aims to perform fixed-point positioning during positioning and simulate the radiation area of X-rays by using a visible light ring, so that the projection position of the X-rays can be adjusted during shooting, the radiation dose of a patient can be obviously reduced, the shooting success rate is increased, and the image medical quality is enhanced.
In order to achieve the above object, an embodiment of the present invention provides a positioner for external visible light projection of a dental film machine, including:
the light source comprises a plurality of lamp beads, and the lamp beads emit visible light;
the base, annular fretwork in the middle of the base, the light source is installed one side of base.
Further, the light source further comprises two intersection lamps, and the two intersection lamps are arranged on 180-degree symmetrical point positions of the base.
Furthermore, the light of the two junction lamps forms a junction point at the position 5 cm-10 cm in front.
Further, the visible light projection positioner is sleeved on the periphery of the thread shielding barrel of the dental film machine through the base.
Further, the base comprises a monolithic body and a split body.
Further, the integral base is integrally formed, and a first elastic piece is arranged on the inner surface of the integral base; the integrated base can be fixed on the periphery of the thread shielding cylinder of the dental film machine through a first elastic piece; the size of the annular hollow-out in the middle of the integrated base can be matched according to the size of the thread shielding cylinder of the dental film machine.
Furthermore, the split base comprises a plurality of base units, and each base unit is connected with the other base unit through a second elastic piece; the second elastic member is made of an elastic material.
Furthermore, the light emitted by the light source is annular as a whole.
Furthermore, the base is also provided with an infrared sensing area.
Furthermore, the lamp beads are LED lamps, and the intersection lamps are laser lamps.
Preferably, the light source is a flexible light source, so that stimulation to a patient is prevented when the light source is irradiated;
further, the base still is provided with the lamp shade, the lamp shade sets up the light source front side.
Furthermore, a power supply is arranged on the base, and the power supply can adopt a USB charging type or a battery placing type.
The invention also provides a using method of the dental film machine external visible light projection positioner, which comprises the following steps:
step 4, adjusting the position of a thread shielding cylinder of the dental film machine through annular visible light, and determining the region for taking the picture of the tooth and the X-ray projection direction;
and 5, opening the dental film machine, carrying out X-ray exposure, taking out the dental film in the mouth of the patient, and finishing shooting.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
1. because the light source adopts the combination of two kinds of visible light, can make clear the size of projection direction and projection regional scope, reach accurate location and shoot the position, solved the problem of fuzzy fixed point location when shooing the oral cavity apex piece in the traditional meaning.
2. The projection direction can be accurately positioned, the deformation characteristic that the annular light of the visible light projection positioner falls on a shooting area is utilized, and the oblate or the long circle can deduce the projection direction and the influence of the projection angle on shooting. The projection angle can be readjusted when necessary, the normal projection is kept, the photographed area is made to be a circular ring as much as possible, and the influence of the projection angle on the form of the photographed tooth can be judged according to the form symmetry of the circular ring.
3. According to the principle that the covered area of the two visible lights is the reference X-ray radiation area, the medical staff can understand and execute the X-ray radiation area more easily, and the teaching is convenient.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a pictorial view of a dental film machine;
FIG. 2 is a schematic overall structure of a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the positioner of FIG. 2 assembled with a spool;
FIG. 4 is a schematic view of the projection of light from the ring lamp and the junction lamp of the fixture of FIG. 2 onto a projection plate;
FIG. 5 is a schematic view of the projection of light from the ring light and the junction light of the fixture of FIG. 2 onto a projection plate;
FIG. 6 is a schematic overall structure of another preferred embodiment of the present invention;
FIG. 7 is a schematic view of the positioner of FIG. 6 assembled with a spool;
FIG. 8 is a schematic view of the projection of light from the ring light and the junction light of the fixture of FIG. 6 onto a projection plate;
FIG. 9 is a schematic view of the projection of light from the ring lamps and the junction lamps of the fixture of FIG. 6 onto a projection plate.
The LED lamp comprises a lamp bead 1, a junction lamp 2, a first elastic piece 3, a second elastic piece 4, a projection plate 5, a junction lamp 6, an integral annular light 7, a shading cylinder 8, a sectional annular light 9 and an infrared sensing area 10.
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.
The embodiment of the invention provides a dental film machine external visible light projection positioner, and solves the problem that the positioning and the fixing points are not accurate enough in the clinical process of the existing apex film projection technology.
As shown in figure 1, the overall view of the dental film machine is a real object overall view, and comprises a bulb tube and a thread shielding cylinder, wherein the bulb tube is connected with the thread shielding cylinder. The bulb tube is an X-ray generator, i.e. a device for generating rays, and a cylindrical ray shielding tube is connected in front of the bulb tube, so that the X-rays are projected to an object to be irradiated, generally teeth, from the direction. Tooth is a specific position, among the current projection technique, when a bulb shading section of thick bamboo location body surface sign, all had and has carried out fuzzy fixed point location through patient's body surface sign adjustment bulb shading section of thick bamboo, lacks the problem of accurate reference and mark. Meanwhile, since X-rays are invisible light beams, the irradiation area thereof cannot be evaluated. The bulb emits X-rays and irradiates the face of a patient with conical or cylindrical rays from the ray shielding cylinder, the closer the bulb is, the smaller the irradiation field is, and the farther the bulb is, the larger the projection field is.
When the dental film is shot, the shading cylinder is adjusted, the shading cylinder is aligned to the part of the patient needing to be shot to shoot, and the specific area of the shot is the same as the X-ray radiation area. However, since the X-ray is invisible, the medical staff can only project according to the angular line projection technology or the parallel projection technology during projection, but the direction, the size and the range of the X-ray cannot be accurately estimated, and it is impossible to know whether the X-ray completely and effectively irradiates the dental film and whether the photographed dental film is distorted and deformed before the photographing result is obtained.
The technical scheme in the embodiment of the invention aims to solve the problem that the positioning fixed point is not accurate enough. In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
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 size and thickness of each component are not limited by the embodiment of the present invention. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
Example one
As shown in fig. 2, the present invention provides a dental film machine external visible light projection positioner, comprising:
the base, annular fretwork in the middle of the base to one side of base is provided with the light source.
The light source includes a plurality of lamp pearls 1, and lamp pearl 1 sends visible light, and lamp pearl 1 is the LED lamp and is flexible light source.
The light source also comprises two intersection lamps 2, the two intersection lamps 2 are arranged on 180-degree symmetrical points of the base, the intersection lamps 2 are laser lamps, and light emitted by the two intersection lamps 2 forms an intersection point at the position 5 cm-10 cm in front.
The visible light projection positioner is sleeved on the periphery of a thread shielding cylinder of the dental film machine through a base and is generally sleeved on the tail end of the thread shielding cylinder, and the tail end refers to the end part far away from an X-ray source.
According to the regulations, the conventional distance between the X-ray source and the skin is at least more than 20CM, the length of the wire shielding cylinder is removed, and the junction point of the junction lamp is optimally positioned at about 5-10CM in front of the wire shielding cylinder 8 in consideration of the distance between the wire shielding cylinder and the skin, which is needed to be beneficial to hospital feeling prevention and control. The position of the face skin is the fixed point, namely the central point of the projection field, no matter the position before and after the central point, two points are presented in the projection field, and only 5-10CM is the intersection point of the projection.
As shown in fig. 3, the integrated base is integrally formed, the first elastic member 3 is disposed on the inner surface, and the base can be sleeved on the periphery of the thread shielding cylinder 8 through the first elastic member 3 and fixed on the thread shielding cylinder. Wherein, the first elastic member 3 is usually made of rubber.
The size of annular fretwork in the middle of integral base can carry out the adaptation according to the size of the section of thick bamboo that hides of dental film machine, perhaps adjusts the size of first elastic component 3 and carries out the adaptation to form the locator of different sizes.
The light emitted by the light source is annular light beam, and an annular diaphragm is formed on the surface of the irradiated object along the X-ray emission direction.
The integral projection effect of the light rays emitted by the integral annular lamp on the projection plate 5 is integral annular light 7, the intersection of the light rays 6 emitted by the two intersection lamps 2 is the central point of the projection field, the central point only appears at the front 5-10CM (as shown in figure 4), and two points are shown in the projection field at the front and back positions of the central point (as shown in figure 5).
The integral annular base is also provided with a lampshade at the front side of the light source.
Example two
The annular base is split, as shown in fig. 6.
The split type annular base is divided into a plurality of sections, as shown in fig. 7, each two sections are connected through the second elastic piece 4, the base is sleeved on the periphery of the line shielding barrel 8 and fixed on the line shielding barrel.
Wherein the second elastic element 4 is an elastic material connecting element or a stretching contraction ring.
Wherein, the method of connecting each two sections of arc light sources by elastic materials is suitable for the wire shielding cylinders 8 with various calibers; or a stretching and contracting ring is arranged between the lamp sections of the split body.
The elasticity of second elastic component 4 gives split type annular base with elasticity to can be fit for the line covering section of thick bamboo 8 of different bores, and all can reach the purpose that lets base and line covering section of thick bamboo 8 fixed connection.
As shown in fig. 8 and 9, the light projection effect of the split ring-shaped base is segmented ring-shaped light 9 on the projection plate 5.
The intersection of the light rays 6 emitted by the two intersection lamps 2 is the central point of the projection field, the central point only appears 5-10CM ahead (as shown in fig. 8), and two points appear in the projection field at the front and back positions of the central point (as shown in fig. 9).
Wherein, the light source is a flexible light source; the front side of the split type annular base light source is provided with an arc-shaped lampshade.
The lamp beads 1 and the two intersection lamps 2 are charged through a USB, and are provided with USB access ports, 15-25W LED lamps are adopted for the lamp beads 1, and 5-20 mW red laser diodes are adopted for the two intersection lamps 2.
EXAMPLE III
The embodiment provides a use method of the externally-arranged visible light projection positioner for the dental film machine, which comprises the following steps:
1. firstly, installing a visible light projection positioner arranged outside a dental film machine into a sleeve shape at the tail end of a wire shading cylinder;
2. turning on a switch on a visible light projection indicator arranged outside the dental film machine, and projecting the visible light emitted by the visible light projection locator on the face of the patient;
3. adjusting 180-degree symmetrical intersection lamps, and determining the distance between a dental film machine thread shielding cylinder and the face of a patient;
4. the position of a thread shielding cylinder of the dental film machine is adjusted through the shape and deformation of the annular visible light, and the region for taking a picture of the teeth is determined;
5. and opening the dental film machine, carrying out X-ray exposure, taking out the dental film in the mouth of the patient, and finishing shooting.
As shown in fig. 2, 3, 6 and 7, the external visible light projection positioner is further provided with an infrared sensing area 10. When a hand of a human body or a certain part of an object is in an infrared ray area, infrared rays emitted by the infrared emitting tube are reflected to the infrared receiving tube due to shielding of the hand or the body of the human body, and are processed to send signals, and the lamp beads receive the signal instructions to turn on the lamp beads to emit light; when the hand or the object of the human body leaves the infrared sensing range, the lamp bead does not receive the signal, and then the lamp bead does not emit light. The range of the infrared sensing area is 20cm in front, the time length of one-time signal transmission is 30 seconds, and the signal can be transmitted again by re-sensing after the signal is interrupted.
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 dental film machine external visible light projection locator is characterized by comprising:
the light source comprises a plurality of lamp beads, and the lamp beads emit visible light;
the base, annular fretwork in the middle of the base, the light source is installed one side of base.
2. The extradental visible light projection positioner of claim 1, wherein the light source further comprises two intersection lights disposed at 180 ° points of symmetry of the base.
3. The extradental film machine visible light projection locator of claim 2, wherein the lights of the two junction lamps form a junction point 5cm to 10cm in front.
4. The extradosed visible light projection positioner of claim 1, wherein the visible light projection positioner is coupled to the periphery of the shade cylinder of the dental film machine via the base.
5. The extradental visible light projection positioner of claim 1, wherein the base comprises a unitary and a split type.
6. The extradental film machine visible light projection positioner of claim 5, wherein the one-piece base is integrally formed and has an inner surface provided with the first resilient member.
7. The extradental film machine visible light projection positioner of claim 5, wherein the split base comprises a plurality of base units, and each base unit is connected with the other base unit through a second elastic member.
8. The extradental film machine visible light projection positioner of claim 1, wherein the light emitted by the light source is generally ring-shaped.
9. The extradental film machine visible light projection positioner of claim 1, wherein an infrared sensing area is further provided on the base.
10. A method of using the extradental film machine visible light projection positioner of claims 1-9, comprising the steps of:
step 1, sleeving the visible light projection positioner at the tail end of a thread shielding cylinder of a dental film machine;
step 2, turning on a switch on the visible light projection positioner, wherein the visible light emitted by the visible light projection positioner is annular;
step 3, adjusting the 180-degree symmetrical intersection lamps, and determining the distance between the dental film machine thread shielding cylinder and the face of the patient;
step 4, adjusting the position of a thread shielding cylinder of the dental film machine through annular visible light, and determining the region for taking the picture of the tooth and the X-ray projection direction;
and 5, opening the dental film machine, carrying out X-ray exposure, taking out the dental film in the mouth of the patient, and finishing shooting.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795582.2A CN111920442A (en) | 2020-08-10 | 2020-08-10 | External visible light projection positioner for dental film machine and use method thereof |
| 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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795582.2A CN111920442A (en) | 2020-08-10 | 2020-08-10 | External visible light projection positioner for dental film machine and use method thereof |
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| CN111920442A true CN111920442A (en) | 2020-11-13 |
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| CN202010795582.2A Pending CN111920442A (en) | 2020-08-07 | 2020-08-10 | External visible light projection positioner for dental film machine and use method thereof |
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