Phantom for evaluating performance of dental imaging device

Abstract

The present invention relates to a phantom for evaluating the performance of a dental imaging device. The phantom for evaluating the performance of a dental imaging device, according to an embodiment of the present invention, comprises: a replicate member; and a debossed part recessed from one surface of the replicate member.

Description

Phantom for evaluating dental imaging device performance

[0001] The present invention relates to a phantom for evaluating the performance of a dental imaging device. More specifically, the present invention relates to a phantom for evaluating the performance of a dental imaging device that enhances the convenience of evaluating the performance of a dental imaging device.

[0002]

[0003] The material described in this section merely provides background information for the present invention and does not constitute prior art.

[0004] Optical coherence tomography (OCT) is a medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images within optically scattering media, such as biological tissues. Recently, OCT has been used to assess the condition of teeth and gums. Because OCT provides higher-resolution, real-time images than conventional imaging techniques, its use in dentistry is expected to increase significantly in the future. However, as a device for assessing the condition of teeth and gums, it remains in the early stages of development.

[0005] To develop dental optical coherence tomography (OCT) devices, evaluating their performance is essential. However, phantoms that replicate the characteristics of actual teeth are not widely available, and conventional phantoms are not suitable for evaluating image quality (resolution, depth of field, etc.).

[0006]

[0007] Accordingly, the present invention has been devised to solve the problems of the prior art, and to provide a phantom for evaluating the performance of a dental imaging device that increases the convenience of evaluating the performance of a dental imaging device.

[0008] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0009]

[0010] A phantom for evaluating the performance of a dental imaging device of the present invention comprises: a replica member; and a concave portion embedded from one surface of the replica member.

[0011] The above-mentioned engraved portion may have a plurality of consecutive step portions.

[0012] The above plurality of step portions may be formed to slope downward toward the horizontal center of the copy member.

[0013] The above-mentioned engraving portion may include a plurality of first linear engravings spaced apart from each other in a first direction on a horizontal plane and having different widths.

[0014] The above-mentioned engraving portion may include a plurality of second linear engravings spaced apart from each other in a first direction on a horizontal plane and having different widths.

[0015] The plurality of first linear engravings may have different depths from each other.

[0016] The plurality of second linear engravings may have different depths.

[0017] A plurality of plate-shaped replica members stacked along a height direction, each of the plate-shaped replica members having the plurality of first linear intaglios and the plurality of second linear intaglios.

[0018] The engraved portion may be engraved on the upper surface of each of the above plate-shaped replica members, and a convex portion may be formed on the lower surface of each of the above plate-shaped replica members to match the engraved portion of another above plate-shaped replica member.

[0019] The above-mentioned copy member has one side that is erected vertically and the other side that slopes downward as it goes outward, and the engraved portion may include a spiral engraving extending from the upper surface of the copy member to the lower surface.

[0020] The outer end of the radial section of the spiral rotation of the above spiral engraving may have a triangular shape.

[0021] The outer end of the spiral rotation cross-section of the above spiral engraving may have a trapezoidal shape.

[0022] An implant screw adapted to the above-mentioned concave portion may further be included.

[0023] At least part of it can be formed from silicone or PDMS.

[0024]

[0025] According to the present invention, a phantom for evaluating the performance of a dental imaging device is provided to increase the convenience of evaluating the performance of a dental imaging device.

[0026]

[0027] FIG. 1 is a perspective view of a phantom (100) for evaluating the performance of a dental imaging device according to the first embodiment of the present invention.

[0028] Fig. 2 is a cutaway perspective view of a phantom (100) for evaluating the performance of a dental imaging device according to the first embodiment of the present invention.

[0029] Figure 3 is a perspective view of a phantom for evaluating the performance of a dental imaging device according to a second embodiment of the present invention.

[0030] Fig. 4 illustrates a plate-shaped replica member (210) of a phantom for evaluating the performance of a dental imaging device according to the second embodiment of the present invention.

[0031] Figure 5 is a perspective view of a phantom (300) for evaluating the performance of a dental imaging device according to a third embodiment of the present invention.

[0032] Figure 6 is an example of the shape of the engraved portion (320) according to the third embodiment of the present invention.

[0033] Figure 7 is a perspective view of a phantom (400) for evaluating the performance of a dental imaging device according to a fourth embodiment of the present invention.

[0034]

[0035] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to readily describe the relationship between one component and another, as illustrated in the drawings. Spatially relative terms should be understood to encompass different orientations of the components during use or operation, in addition to the orientations depicted in the drawings. Components may be oriented in other directions, and thus spatially relative terms may be interpreted accordingly.

[0036] When a part in this specification is said to be connected to another part, this includes not only direct connections but also connections with other elements intervening. Furthermore, when a part is said to include a component, this does not exclude other components, unless otherwise specifically stated, but rather implies the inclusion of additional components.

[0037] While terms such as "first," "second," and "third" may be used herein to describe various components, these components are not limited by these terms. These terms are used to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second" or "third" component, and similarly, a "second" or "third" component could be referred to interchangeably.

[0038] A phantom for evaluating the performance of a dental imaging device of the present invention has a replica member and a concave portion recessed from one surface. The replica member replicates a tooth or gingiva. The concave portion may, depending on the embodiment, replicate a crack formed in a tooth, a congenital or acquired sunken shape of a tooth, an insertion hole for an implant screw formed in the gingiva, etc., and may provide information such as resolution according to depth. The present invention can provide image interpretation results that are closer to actual teeth and gingiva by resembling the characteristics of teeth that are actual imaging targets of a dental imaging device.

[0039]

[0040] Hereinafter, a phantom (100) for evaluating the performance of a dental imaging device according to a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of a phantom (100) for evaluating the performance of a dental imaging device according to a first embodiment of the present invention. Fig. 2 is a cutaway perspective view of a phantom (100) for evaluating the performance of a dental imaging device according to a first embodiment of the present invention.

[0041] Referring to FIGS. 1 and 2, a dental imaging device according to a first embodiment of the present invention has a replica member (110) and a concave portion (120) recessed from one surface of the replica member (110). The replica member (110) may have a rectangular parallelepiped shape. However, the shape of the replica member (110) is not limited to this embodiment. For example, the replica member (110) may have a polygonal prism shape with rounded corners.

[0042] The replica member (110) corresponds to a tooth and may be made of a material having similar physical properties to the tooth. For example, the replica member (110) may be made of PDMS. However, the material of the replica member (110) is not limited thereto. The replica member (110) may be made of, for example, a high molecular polymer or ceramic.

[0043] The engraved portion (120) may be formed by recessing downward from the upper surface of the replica member (110). The engraved portion (120) may have a plurality of continuous step portions (121). Here, the plurality of step portions (121) may be formed to be inclined downward toward the horizontal direction (xy plane direction) center of the replica member (110). According to the shape of the engraved portion (120), the vertical direction (z-axis direction) cut surface and the horizontal direction (xy plane direction) cut surface of the replica member (110) may have different shapes depending on the cut position, and a dental imaging device performance evaluator can smoothly evaluate the performance of the dental imaging device based on the difference in the shapes. The engraved portion (120) may have 10 step portions (121) each having a height of 2 mm.

[0044] Although not shown, the engraved portion (120) of the replica member (110) may be filled with a filling material. The filling material may correspond to a tooth restoration or tartar, and may be made of a material different from that of the replica member (110).

[0045]

[0046] Hereinafter, a phantom for evaluating the performance of a dental imaging device according to a second embodiment of the present invention will be described with reference to the drawings. Fig. 3 is a perspective view of a phantom for evaluating the performance of a dental imaging device according to a second embodiment of the present invention. Fig. 4 illustrates a plate-shaped replica member (210) of a phantom for evaluating the performance of a dental imaging device according to a second embodiment of the present invention.

[0047] Referring to FIGS. 3 and 4, a phantom (200) for evaluating the performance of a dental imaging device according to the second embodiment includes a plate-shaped replica member (210) and an engraved portion (220) embedded from one surface of the plate-shaped replica member (210). The plate-shaped replica member (210) corresponds to a tooth and may be made of a material having physical properties similar to those of a tooth. For example, the plate-shaped replica member (210) may be made of a PDMS material. However, the material of the plate-shaped replica member (210) is not limited thereto. The plate-shaped replica member (210) may be made of, for example, a high molecular polymer or a ceramic.

[0048] A phantom (200) for evaluating the performance of a dental imaging device according to a second embodiment includes a plurality of plate-shaped replica members (210), and the plurality of plate-shaped replica members (210) are stacked along the height direction (z-axis direction). The plurality of plate-shaped replica members (210) have the same shape and specifications, and the same engraved portion (220) can be engraved on each of the plate-shaped replica members (210). Each of the plate-shaped replica members (210) can have a rectangular parallelepiped shape. However, the shape of the plate-shaped replica members (210) is not limited to this embodiment. The plate-shaped replica members (210) may have, for example, a polygonal prism shape with rounded corners. The height of each plate-shaped replica member (210) can be 0.3 mm. The phantom (200) according to the second embodiment has six plate-shaped replica members (210), but the size or number thereof is not limited thereto.

[0049] The engraving part (220) may include a plurality of first linear engravings (221) and a plurality of second linear engravings (222). The plurality of first linear engravings (221) are spaced apart from each other in a first direction (x-axis direction) on a horizontal plane and have different widths (in the present disclosure, the width refers to the width in the direction perpendicular to the longitudinal direction). The bottom of the first linear engravings (221) may be formed round or flat, but the shape thereof is not particularly limited. Each plate-shaped copying member (210) may have four first linear engravings (221), but the number of first linear engravings (221) is not limited thereto. Since the first linear engravings (221) have different widths, a performance evaluator of a dental imaging device can easily evaluate the resolution of the imaging device based on how each of the first linear engravings (221) is displayed in an image.

[0050] In addition, a plurality of second linear negative engravings (222) are spaced apart from each other in a second direction (y-axis direction) on a horizontal plane and have different widths. Here, the second direction may be any direction other than the first direction, but in order to enable smoother image device evaluation in the invention of the second embodiment, the first linear negative engravings (221) and the second linear negative engravings (222) are formed in directions that are orthogonal to each other on the horizontal plane.

[0051] The plurality of first linear negative impressions (221) may have different depths from each other. Similarly, the plurality of second linear negative impressions (222) may have different depths from each other. The spacing between the plurality of first linear negative impressions (221) and the spacing between the plurality of second linear negative impressions (222) may be approximately 0.2 mm. The negative impression portion (220) may be formed by a cutting process including milling or an indentation process, but is not limited thereto, and the plate-shaped replica member (210) having the negative impression portion (220) may be integrally manufactured by casting or 3D printing.

[0052] Referring to FIGS. 3 and 4, a concave portion (220) may be formed on the upper surface of each plate-shaped replica member (210), and a convex portion (230) that matches the concave portion (220) of another plate-shaped replica member (210) may be formed on the lower surface of each plate-shaped replica member (210). When plate-shaped replica members (210) of such shapes are stacked, the convex portion (230) of the plate-shaped replica member (210a) stacked on the upper side thereof is inserted into the concave portion (220) of each plate-shaped replica member (210b). Here, the plate-shaped replica member (210b) located on the lower side may correspond to a tooth, and the convex portion (230) of the plate-shaped replica member (210a) located on the upper side thereof may correspond to a restoration or tartar of the tooth.

[0053]

[0054] Hereinafter, a phantom for evaluating the performance of a dental imaging device according to a third embodiment of the present invention will be described with reference to the drawings. Fig. 5 is a perspective view of a phantom (300) for evaluating the performance of a dental imaging device according to a third embodiment of the present invention. Fig. 6 shows examples of the shape of an engraved portion (320) according to a third embodiment of the present invention.

[0055] Referring to FIG. 5, a phantom (300) according to a third embodiment of the present invention has a replica member (310) and a concave portion (320) recessed from one surface of the replica member (310). Here, the replica member (310) corresponds to gingiva. The replica member (310) may be formed of a material having physical properties similar to gingiva, for example, silicone. However, the material of the replica member (310) does not correspond thereto. The replica member (310) may be formed of, for example, a high molecular polymer.

[0056] The replica member (310) according to the third embodiment has one side surface that is vertically erected and the other side surface that slopes downwards as it goes outward. Through images captured at different depths from the inclined other side surface, the quality of the implant image at different depths can be evaluated. Through images captured at different depths from the one side surface that is vertically erected, the quality of the implant image at the same depth can be evaluated.

[0057] The engraved portion (320) according to the third embodiment includes a spiral engraving (321) extending from the upper surface of the replica member (310) to the lower surface. This engraving corresponds to a screw-shaped perforation formed in the gum by the implant screw.

[0058] The thread shape of the implant screw may vary depending on the product type. Referring to (a) of Fig. 6, the radially outer end (G1) of the spiral rotation cross-section of the spiral intaglio (321) may have a triangular shape. This shaped intaglio portion (320) corresponds to the perforation of the gum into which the implant screw having a triangular spiral rotation cross-section is implanted. Referring to (b) of Fig. 6, the radially outer end (G2) of the spiral rotation cross-section of the spiral intaglio (321) may have a trapezoidal shape. This shaped intaglio portion (320) corresponds to the perforation of the gum into which the implant screw having a trapezoidal spiral rotation cross-section is implanted. In addition, the shape of the intaglio portion (320) may be formed to correspond to any other shape of implant screw available on the market.

[0059]

[0060] Hereinafter, a phantom (400) for evaluating the performance of a dental imaging device according to a fourth embodiment of the present invention will be described with reference to the drawings. Fig. 7 is a perspective view of a phantom (400) for evaluating the performance of a dental imaging device according to a fourth embodiment of the present invention.

[0061] Referring to FIG. 7, a phantom (400) according to a fourth embodiment of the present invention includes a replica member (410), a concave portion (420) inserted from one surface of the replica member (410), and an implant screw (430) fitted into the concave portion (420).

[0062] The replica member (410) corresponds to the gingiva. The replica member (410) may be formed of a material having physical properties similar to those of the gingiva, such as silicone. However, the material of the replica member (410) does not correspond to this. The replica member (410) may be formed of, for example, a high molecular polymer.

[0063] The replica member (410) according to the fourth embodiment has one side surface that is vertically erected and the other side surface that slopes downwards as it goes outward. Through images captured at different depths from the inclined other side surface, the quality of the implant image at different depths can be evaluated. Through images captured at different depths from the one side surface that is vertically erected, the quality of the implant image at the same depth can be evaluated.

[0064] The engraved portion (420) according to the fourth embodiment includes a spiral engraving extending from the upper surface to the lower surface of the replica member (410). This engraving corresponds to a perforation in the shape of a screw groove formed in the gum by the implant screw (430), and may have a shape that matches the implant screw (430) inserted into the engraved portion (420).

[0065] In the fourth embodiment, an implant screw (430) sold commercially can be fitted into the engraved portion (420).

[0066]

[0067] At least a portion of the phantom (100, 200, 300, 400) according to each of the above embodiments may be formed of silicon or PDMS.

[0068] In addition, in the above-described embodiments, the tooth-corresponding imitation member (110, 210) may have a first portion made of a first material and a second portion made of a second material different from the first material. Here, at least a portion of the first portion may be accommodated within the second portion. That is, the second portion may cover at least a portion of the first portion from the outside. The first portion and the second portion may be fixedly coupled to each other.

[0069]

[0070] The above description is merely an example of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications, changes, and substitutions may be made without departing from the essential characteristics of the present invention. Therefore, the present embodiments are not intended to limit the technical idea of ​​the present invention, but rather to explain it, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0071]

[0072] The present invention can be used in the development of a dental imaging device.

Claims

1. Absence of copy; and A concave portion embedded in one side of the above-mentioned copy material; A phantom for evaluating the performance of a dental imaging device including:

2. In paragraph 1, The above engraved part is, A phantom for evaluating the performance of a dental imaging device having a plurality of consecutive steps.

3. In paragraph 2, A phantom for evaluating the performance of a dental imaging device, wherein the plurality of step portions are formed to be inclined downward toward the horizontal center of the replica member.

4. In paragraph 1, A phantom for evaluating the performance of a dental imaging device, wherein the above-mentioned engraving section includes a plurality of first linear engravings spaced apart from each other in a first direction on a horizontal plane and having different widths.

5. In paragraph 4, A phantom for evaluating the performance of a dental imaging device, wherein the engraved portion includes a plurality of second linear engraved portions spaced apart from each other in a first direction on a horizontal plane and having different widths.

6. In paragraph 5, A phantom for evaluating the performance of a dental imaging device, wherein the plurality of first linear engravings have different depths from each other.

7. In paragraph 6, A phantom for evaluating the performance of a dental imaging device, wherein the plurality of second linear engravings have different depths.

8. In paragraph 7, It comprises a plurality of plate-shaped replica members stacked along the height direction, A phantom for evaluating the performance of a dental imaging device, wherein each of the above-mentioned plate-shaped replica members has the plurality of first linear engravings and the plurality of second linear engravings.

9. In paragraph 8, The engraved portion is engraved on the upper surface of each of the above plate-shaped replica members, A phantom for evaluating the performance of a dental imaging device, wherein a convex portion is formed on the lower surface of each of the above-mentioned plate-shaped replica members to match the concave portion of another above-mentioned plate-shaped replica member.

10. In paragraph 1, The above-mentioned copy member has one side that is erected vertically and the other side that slopes downward as it goes outward. A phantom for evaluating the performance of a dental imaging device, wherein the engraved portion includes a spiral engraving extending from the upper surface of the copy member to the lower surface.

11. In paragraph 10, A phantom for evaluating the performance of a dental imaging device, wherein the outer end of the spiral rotation cross-section of the spiral engraving has a triangular shape.

12. In paragraph 10, A phantom for evaluating the performance of a dental imaging device, wherein the outer end of the spiral rotation cross-section of the spiral engraving has a trapezoidal shape.

13. In paragraph 10, A phantom for evaluating the performance of a dental imaging device, further comprising an implant screw adapted to the engraved portion.

14. In paragraph 1, A phantom for evaluating the performance of a dental imaging device, at least in part formed of silicone or PDMS.

Images