X-ray projection angle measuring device based on sub-angle line projection technology
By designing an X -ray device measurement of X -ray device that holds the structure of the chip holder and a right -angle angle, the angle adjustment in the angle line application technology is not allowed to cause the image distortion, and the X -ray application angle is accurately measured. Ensure the authenticity of the image and the operability of the operation.
Patent Information
- Application Number
- CN202420486262.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-13
AI Technical Summary
In the existing partial angle projection technology, operators adjust the X-ray projection angle based on subjective experience, which is prone to problems such as inaccurate angle adjustment, resulting in image distortion and deformation.
The X -ray device measurement device based on the angle -based projection technology is designed, including the structure of the chip holder and the right -angle angle angle. The angle device directly reads the X -ray application angle.
The accurate measurement of the X -ray application angle is achieved, the authenticity of the image is guaranteed, and the standard operations from subjective experience judgment to visualization and quantitativeization are transformed, and the operability of operation is improved.
Smart Images
Figure CN222398437U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oral examination, in particular to an X-ray projection angle measuring device based on angle dividing line projection technology. Background Art
[0002] Oral X-ray is the most common examination method in clinical stomatology, and periapical film is one of the most widely used oral X-ray films. Currently, periapical film is mainly based on two projection techniques, namely, periapical film parallel projection technique and periapical film angle projection technique.
[0003] Now we briefly explain the principles of the two projection technologies: Parallel projection technology: Figure 1 As shown, the X-ray film 11 is placed parallel to the long axis of the tooth 12, and the center line of the X-ray is perpendicular to the long axis of the X-ray film 11 and the tooth 12 during projection. In theory, an X-ray image with the same length as the actual length of the tooth can be taken. Angle splitting projection technology: It is designed based on the principle that if two angles in a common side triangle are equal, then the two triangles are congruent. Figure 2 As shown, the X-ray film 21 and the long axis of the tooth 22 form an angle. When the angle is bisected by an imaginary straight line (angle bisector), two equal angles with a common side can be formed. When the center line of the X-ray passes through the long axis of the tooth and is perpendicular to the imaginary angle bisector, the third side of the triangle is formed. The two triangles are congruent right triangles. The sides corresponding to the right angle are the long axis of the tooth and the long axis of the tooth formed on the film. Therefore, when the projection angle is correct, the long axis of the tooth image on the film is equal to the actual length of the tooth.
[0004] However, the existing technology has the following problems: Parallel projection technology: When placing the film, in order to ensure that the film and the long axis of the tooth are parallel, the film has to be slightly away from the target tooth. In order to avoid the enlargement of the X-ray image caused by this (the X-ray is not emitted completely in parallel), a long shielding tube must be used during projection, which leads to an increase in exposure, and the radiation dose received by the patient may increase as a result. In addition, a specific film holder and positioning indicator device must be used for parallel projection. The patient has a strong sense of foreign body, and the operation is time-consuming and laborious. At present, except for scientific research needs, it has basically been abandoned in clinical practice. Angled line projection technology: Angled line projection technology is easy to operate. The patient can fix the film with his fingers. No specific film holder and positioning projection device are required. It is widely used in clinical practice. However, during projection, the center line of the X-ray is not perpendicular to the long axis of the tooth and the film. Instead, the direction of the center line of the X-ray is adjusted according to an angle bisector. It often depends on the operator's rich experience, and the image taken often has varying degrees of distortion. Utility Model Content
[0005] In view of the above-mentioned problems, the utility model discloses an X-ray projection angle measuring device based on the angle-dividing line projection technology, so as to solve the problem that in the prior art angle-dividing line projection technology, the operator relies on subjective experience to adjust the X-ray projection angle according to an imaginary angle bisector, which is prone to inaccurate angle adjustment and causes different degrees of distortion of the captured image.
[0006] The utility model discloses a dental film projection angle measuring device based on the angle division line projection technology, which comprises a film holder structure and a right-angle protractor;
[0007] The film holder structure includes a film holder body, a handle bar and a parallelogram structure, wherein the film holder body is fixed to the handle bar along one side of the top of the handle bar, and a tooth film or a sensor is arranged in the film holder body; and one end of the film holder body is arranged near the incisal end of the occlusal surface of the tooth to be photographed, and the other end of the film holder body is arranged on the palate side of the tooth to be photographed and is arranged close to the palate side of the tooth to be photographed, and the parallelogram structure includes two oppositely arranged horizontal sides and a hypotenuse arranged opposite to the handle bar, and the two ends of the two horizontal sides are respectively connected to the hypotenuse and the handle bar, and the angles between the two horizontal sides and the hypotenuse and the handle bar are adjustable;
[0008] The lower right-angle side of the two right-angle sides of the right-angle protractor is arranged along an outer hypotenuse of the parallelogram structure, and the right-angle vertex of the right-angle protractor is arranged close to the outer vertex of the two upper vertices of the parallelogram structure.
[0009] In some of the embodiments, the horizontal side of the parallelogram structure is a horizontal rod, the hypotenuse is an oblique rod, and the two ends of the horizontal rod are connected to the oblique rod and the handle rod respectively by bolts.
[0010] In some of the embodiments, each of the horizontal rods is provided with a first slide groove arranged along the length direction of the horizontal rod, the diagonal rod is provided with a second slide groove arranged along the length direction of the diagonal rod, and the handle rod is provided with a third slide groove arranged along the length direction of the handle rod, and the rod portion of the bolt passes through the first slide groove and the second slide groove / the third slide groove and is fastened to the nut on the opposite side.
[0011] In some embodiments, the length from the connection point between the handle bar and the horizontal bar to the film holder body is 3-8 mm.
[0012] In some embodiments, the length of the horizontal rod is 20-30 mm.
[0013] In some embodiments, the horizontal rod and the diagonal rod are both made of plastic.
[0014] In some embodiments, an end of the handle bar away from the film holder body is coated with an anti-slip layer.
[0015] In some embodiments, the anti-slip layer is made of rubber.
[0016] In some embodiments, one end of the film holder body adjacent to the incisal end of the occlusal surface of the tooth to be photographed extends 3-5 mm beyond the incisal end of the occlusal surface of the tooth to be photographed.
[0017] The above utility model has at least one of the following advantages or beneficial effects:
[0018] The utility model provides an X-ray projection angle measuring device based on the angle division line projection technology. The measuring device can transfer the angle formed by the long axis of the tooth and the dental film / sensor during the angle division line projection from inside the mouth to outside the mouth, and directly read it through a right-angle protractor, so as to accurately obtain the X-ray projection angle, thereby ensuring the authenticity of the image taken. The utility model can realize the transformation from the previous operator's subjective experience to judge the angle bisector between the long axis of the tooth and the dental film or sensor to a visualized and quantified standard operation, and has strong operability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on illustrating the subject matter of the present invention.
[0020] Figure 1 It is a structural schematic diagram of taking oral X-ray films based on parallel projection technology in the background technology of the utility model;
[0021] Figure 2 It is a structural schematic diagram of taking oral X-ray films based on the angle line projection technology in the background technology of the utility model;
[0022] Figure 3 It is a structural schematic diagram of an X-ray projection angle measuring device based on the angle division line projection technology in an embodiment of the utility model;
[0023] Figure 4 This is an enlarged schematic diagram of the film holder structure in the embodiment of the utility model
[0024] Figure 5 This is a schematic diagram of an X-ray projection angle measuring device based on angle dividing line projection technology in an embodiment of the utility model. DETAILED DESCRIPTION
[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.
[0026] like Figure 3 and 4 As shown, the utility model discloses a dental film projection angle measuring device based on the angle division line projection technology. Specifically, the dental film projection angle measuring device based on the angle division line projection technology includes a film holder structure 32 and a right-angle protractor 33; the film holder structure 32 includes a film holder body 321, a handle bar 323 and a parallelogram structure 322, the film holder body 321 is fixed on the handle bar 323 along one side of the top of the handle bar 323, and a dental film or a sensor is arranged in the film holder body 321; and one end of the film holder body 321 is arranged near the incisal end of the occlusal surface of the tooth 31 to be photographed, and the other end of the film holder body 321 is arranged at The parallelogram structure 322 is arranged on the palatal side of the tooth 31 to be photographed and is close to the palatal side of the tooth 31 to be photographed. The parallelogram structure 322 includes two relatively arranged horizontal sides and a hypotenuse arranged opposite to the handle rod 323. The two ends of the two horizontal sides are respectively connected to the hypotenuse and the handle rod 323, and the angles between the two horizontal sides and the hypotenuse and the handle rod 323 are all adjustable; one of the two right-angled sides of the right-angle protractor 33 located at the bottom is arranged along the hypotenuse located on the outside of the parallelogram structure 322, and the right-angle vertex of the right-angle protractor 33 is closely arranged at the outer vertex of the two vertices located at the upper part of the parallelogram structure 322.
[0027] Specifically, the horizontal side of the above-mentioned parallelogram structure 322 is the horizontal rod 3221, and the hypotenuse is the oblique rod 3222. The two ends of the horizontal rod 3221 are respectively connected together by bolts 3223 and the oblique rod 3222 and the handle rod 323; each horizontal rod 3221 is provided with a first slide groove arranged along the length direction of the horizontal rod 3221 (that is, the upper and lower horizontal rods 3221 are respectively provided with a first slide groove), the oblique rod 3222 is provided with a second slide groove arranged along the length direction of the oblique rod 3222, and the handle rod 323 is provided with a third slide groove arranged along the length direction of the handle rod 323, and the rod portion of the bolt 3223 passes through the first slide groove and the second slide groove / the third slide groove and is fastened to the nut on the opposite side.
[0028] In a preferred embodiment of the present invention, the length from the connection between the handle rod 323 and the horizontal rod 3221 to the film holder body 321 is 3 to 8 mm, so that the parallelogram structure 322 can be located outside the patient's mouth when in use, thereby not causing discomfort to the patient and making the measurement operation more convenient.
[0029] In a preferred embodiment of the present invention, the length of the horizontal rod 3221 is 20-30 mm.
[0030] In a preferred embodiment of the present invention, the horizontal rod 3221 and the oblique rod 3222 are both made of plastic material that is easily penetrated by X-rays. This is because plastic has sufficient hardness and is light in weight and is easy to use.
[0031] In a preferred embodiment of the present invention, one end of the handle rod 323 is connected to the film holder body 321, and the other end of the handle rod 323 is coated with an anti-slip layer 34; the anti-slip layer 34 is made of rubber material for easy gripping.
[0032] In a preferred embodiment of the present invention, one end of the film holder body 321 adjacent to the occlusal incisal end of the tooth 31 to be photographed extends 3-5 mm beyond the occlusal incisal end of the tooth 31 to be photographed, so as to avoid the problem of incomplete captured images.
[0033] Combine the following Figure 5 The principle of the dental film projection angle measuring device based on the angle division line projection technology of the utility model that can measure the X-ray projection angle is described as follows:
[0034] Let HH' be the angle bisector of ∠GEF, AI be the angle bisector of ∠CAB, and draw KK' through A, which is parallel to HH'.
[0035] Assume: ∠CAD = X, then ∠CAB = π / 2–X, and thus ∠IAC = π / 4–X / 2.
[0036] Because DD'∥FF', ∠CEF'=X, thus ∠F'EG'=∠GEF=π / 2–X;
[0037] Because HE bisects ∠GEF, ∠HEF=∠F'E H'=∠DAK'=π / 4–X / 2;
[0038] Therefore: ∠IAK'=π / 2, that is, IA⊥HH';
[0039] Therefore, if the incident direction of the ray is parallel to IA, it must be perpendicular to the angle bisector of ∠GEF; therefore, it is only necessary to ensure that the incident direction of the ray is parallel to IA.
[0040] The method of using the above-mentioned dental film projection angle measurement device based on the angle division line projection technology is as follows:
[0041] First, adjust the patient's position so that the teeth to be photographed are perpendicular to the ground.
[0042] Secondly, insert the dental film or sensor into the film holder body, and place the film holder body into the patient's mouth through the handle rod, so that one end of the film holder body is close to the inner side of the occlusal surface of the tooth to be photographed, and the other end is set on the palatal side of the tooth to be photographed and close to the palatal side of the tooth to be photographed (generally, the patient can operate it by holding the handle rod by hand).
[0043] Then, the parallelogram structure is adjusted so that the two horizontal sides of the parallelogram structure are parallel to the ground. Specifically, the nuts are loosened and the positions of the sliding bolts are adjusted to adjust the angles at which the horizontal rods and the diagonal rods are fixed so that the two horizontal rods of the parallelogram structure are parallel to the ground, thereby making the two horizontal sides of the parallelogram structure parallel to the ground.
[0044] Afterwards, a right-angled side of the right-angle protractor located at the bottom is arranged along the hypotenuse of the parallelogram structure, and the right-angled vertex of the right-angle protractor is arranged close to the outer vertex of the two vertices located at the top of the parallelogram structure.
[0045] Finally, read the degree of the upper horizontal side of the parallelogram structure on the right-angle protractor (i.e. the angle formed by the long axis of the tooth to be photographed and the dental film or sensor), and divide the degree by 2 to obtain the X-ray projection angle.
[0046] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present utility model, and will not be described in detail here.
[0047] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific implementation methods, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the utility model without departing from the scope of the technical solution of the utility model, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.
Claims
1. A dental film projection angle measurement device based on angle division line projection technology, characterized in that: It includes a film holder structure and a right-angle protractor; The film holder structure includes a film holder body, a handle bar and a parallelogram structure, wherein the film holder body is fixed to the handle bar along one side of the top of the handle bar, and a tooth film or a sensor is arranged in the film holder body; and one end of the film holder body is arranged near the incisal end of the occlusal surface of the tooth to be photographed, and the other end of the film holder body is arranged on the palate side of the tooth to be photographed and is arranged close to the palate side of the tooth to be photographed, and the parallelogram structure includes two oppositely arranged horizontal sides and a hypotenuse arranged opposite to the handle bar, and the two ends of the two horizontal sides are respectively connected to the hypotenuse and the handle bar, and the angles between the two horizontal sides and the hypotenuse and the handle bar are adjustable; The lower right-angle side of the two right-angle sides of the right-angle protractor is arranged along an outer hypotenuse of the parallelogram structure, and the right-angle vertex of the right-angle protractor is arranged close to the outer vertex of the two upper vertices of the parallelogram structure.
2. The dental film projection angle measuring device based on the angle division line projection technology according to claim 1, characterized in that: The horizontal side of the parallelogram structure is a horizontal rod, the hypotenuse is an oblique rod, and the two ends of the horizontal rod are respectively connected with the oblique rod and the handle rod through bolts.
3. The dental film projection angle measuring device based on the angle division line projection technology according to claim 2, characterized in that: Each of the horizontal rods is provided with a first sliding groove arranged along the length direction of the horizontal rod, the diagonal rod is provided with a second sliding groove arranged along the length direction of the diagonal rod, and the handle rod is provided with a third sliding groove arranged along the length direction of the handle rod. The rod portion of the bolt passes through the first sliding groove and the second sliding groove / the third sliding groove and is fastened to the nut on the opposite side.
4. The dental film projection angle measuring device based on the angle division line projection technology according to claim 3, characterized in that: The length between the connection point between the handle bar and the horizontal bar and the film holder body is 3 to 8 mm.
5. The dental film projection angle measuring device based on the angle division line projection technology according to claim 2, characterized in that: The length of the horizontal rod is 20-30 mm.
6. The dental film projection angle measuring device based on the angle division line projection technology according to claim 2, characterized in that: The horizontal rod and the oblique rod are both made of plastic.
7. The dental film projection angle measurement device based on the angle division line projection technology according to claim 1, characterized in that: The end of the handle rod away from the film holder body is coated with an anti-slip layer.
8. The dental film projection angle measuring device based on the angle division line projection technology according to claim 7, characterized in that: The anti-slip layer is made of rubber.
9. The dental film projection angle measuring device based on the angle division line projection technology according to claim 1, characterized in that: One end of the film holder body adjacent to the occlusal cutting end of the tooth to be photographed exceeds the occlusal cutting end of the tooth to be photographed by 3-5 mm.