Phantom for Performance Evaluation of Dental Imaging Device

Abstract

The present invention relates to a phantom for evaluating the performance of a dental imaging device. A phantom for evaluating the performance of a dental imaging device according to one embodiment of the present invention comprises: a simulating member; and an indented portion indented from one surface of the simulating member.

Description

Technology Field

[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. Background Technology

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

[0004] Optical coherence tomography (OCT) is a medical imaging technology that uses light to capture three-dimensional images with micrometer resolution within an optical scattering medium, such as biological tissue. Recently, OCT has been used to evaluate the condition of teeth and gingiva. Although OCT is expected to see a significant increase in use in dentistry in the future as it provides real-time images with high resolution compared to conventional imaging techniques, it remains in the early stages of development as a device for evaluating the condition of teeth and gingiva.

[0005] In order to advance dental optical coherence tomography devices, it is essential to evaluate the performance of the device. However, various phantoms that mimic the characteristics of actual teeth have not been proposed, and conventional phantoms have the problem of not being suitable for evaluating image quality (resolution and imaging depth, etc.). The problem to be solved

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

[0008] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description below. means of solving the problem

[0010] The phantom for evaluating the performance of a dental imaging device according to the present invention comprises: a simulating member; and an indented portion indented from one surface of the simulating member.

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

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

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

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

[0015] The above plurality of first linear indentations may have different depths.

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

[0017] It includes a plurality of plate-shaped imitation members stacked along the height direction, and each of the plate-shaped imitation members may have the plurality of first linear indentations and the plurality of second linear indentations.

[0018] The intaglio portion may be engraved on the upper surface of each of the above-mentioned plate-shaped imitation members, and a convex portion that fits into the intaglio portion of another plate-shaped imitation member may be formed on the lower surface of each of the above-mentioned plate-shaped imitation members.

[0019] The above-mentioned imitation member has one side oriented vertically and another side sloping downward toward the outside, and the above-mentioned engraving may include a spiral engraving extending from the upper surface of the imitation member downward.

[0020] The outer end of the radius of the spiral rotation cross-section of the above spiral indentation may have a triangular shape.

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

[0022] It may further include an implant screw that fits into the above-mentioned engraved portion.

[0023] At least a portion can be formed of silicon or PDMS. Effects of the invention

[0025] According to the present invention, a phantom for evaluating the performance of a dental imaging device is provided, which increases the convenience of evaluating the performance of a dental imaging device. Brief explanation of the drawing

[0027] 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 cross-sectional view of a phantom (100) for evaluating the performance of a dental imaging device according to the first embodiment of the present invention. 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 shows a plate-shaped simulating member (210) of a phantom for evaluating the performance of a dental imaging device according to a second embodiment of the present invention. FIG. 5 is a transmission 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 is an example of the shape of the intaglio portion (320) according to the third embodiment of the present invention. FIG. 7 is a transmission perspective view of a phantom (400) for evaluating the performance of a dental imaging device according to the fourth embodiment of the present invention. Specific details for implementing the invention

[0028] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to facilitate the description of the relationship between one component and another, as illustrated in the drawings. Spatially relative terms should be understood as encompassing different orientations of the component during use or operation, in addition to the direction illustrated in the drawings. Components may be oriented in other directions, and accordingly, spatially relative terms may be interpreted according to the orientation.

[0029] In this specification, when it is stated that a part is connected to another part, this includes not only cases where they are directly connected, but also cases where they are connected with other elements interposed between them. Furthermore, when it is stated that a part includes a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0030] In this specification, terms such as first, second, third, etc., may be used to describe various components, but these components are not limited by these terms. The terms are used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, the first component may be named the second or third component, and similarly, the second or third component may be named alternately.

[0031] The phantom for evaluating the performance of a dental imaging device according to the present invention has a simulating member and an indented portion recessed from one side. The simulating member simulates a tooth or gingiva. Depending on the embodiment, the indented portion may simulate a crack formed in a tooth, a shape of a tooth that is congenitally or acquiredly indented, an insertion hole of an implant screw formed in the gingiva, etc., and may provide information such as resolution according to depth. The present invention can provide image reading results that are closer to actual teeth and gingiva by resembling the characteristics of the tooth that is the actual imaging target of the dental imaging device.

[0033] 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 cross-sectional perspective view of a phantom (100) for evaluating the performance of a dental imaging device according to a first embodiment of the present invention.

[0034] Referring to FIGS. 1 and 2, a dental imaging device according to a first embodiment of the present invention has a simulating member (110) and an indented portion (120) recessed from one side of the simulating member (110). The simulating member (110) may have a rectangular parallelepiped shape. However, the shape of the simulating member (110) is not limited to this embodiment. The simulating member (110) may have, for example, a polygonal prism shape with rounded corners.

[0035] The imitation member (110) corresponds to a tooth and may be made of a material having physical properties similar to a tooth. For example, the imitation member (110) may be made of PDMS material. However, the material of the imitation member (110) is not limited thereto. The imitation member (110) may be made of, for example, a polymer or ceramic.

[0036] The engraved portion (120) may be formed by being recessed downward from the upper surface of the imitation member (110). The engraved portion (120) may have a plurality of consecutive stepped portions (121). Here, the plurality of stepped portions (121) may be formed to be inclined downward toward the center of the horizontal direction (xy-plane direction) of the imitation member (110). Due to the shape of the engraved portion (120), the vertical direction (z-axis direction) cutting surface and the horizontal direction (xy-plane direction) cutting portion of the imitation member (110) may have different shapes depending on the cutting position, and the dental imaging device performance evaluator can smoothly evaluate the performance of the dental imaging device based on these differences in shape. The engraved portion (120) may have 10 stepped portions (121), each having a height of 2 mm.

[0037] Although not shown, a filling material may be filled into the engraved portion (120) of the imitation member (110). The filling material may correspond to a tooth restoration or tartar and may be made of a material different from that of the imitation member (110).

[0039] 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 shows a plate-shaped imitation member (210) of a phantom for evaluating the performance of a dental imaging device according to a second embodiment of the present invention.

[0040] 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 imitation member (210) and an indented portion (220) indented from one side of the plate-shaped imitation member (210). The plate-shaped imitation member (210) corresponds to a tooth and may be made of a material having physical properties similar to a tooth. For example, the plate-shaped imitation member (210) may be made of PDMS material. However, the material of the plate-shaped imitation member (210) is not limited thereto. The plate-shaped imitation member (210) may be made of, for example, a polymer or ceramic.

[0041] A phantom (200) for evaluating the performance of a dental imaging device according to a second embodiment includes a plurality of plate-shaped imitation members (210), and the plurality of plate-shaped imitation members (210) are stacked along the height direction (z-axis direction). The plurality of plate-shaped imitation members (210) have mutually identical shapes and specifications, and mutually identical intaglio (220) may be engraved on each plate-shaped imitation member (210). Each plate-shaped imitation member (210) may have a rectangular parallelepiped shape. However, the shape of the plate-shaped imitation members (210) is not limited to this embodiment. The plate-shaped imitation members (210) may have, for example, a polygonal prism shape with rounded corners. The height of each plate-shaped imitation member (210) may be 0.3 mm. The phantom (200) according to the second embodiment has six plate-shaped imitation members (210), but the specifications or number thereof are not limited thereto.

[0042] The engraved portion (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 this disclosure, width refers to the width in a direction perpendicular to the length direction). The bottom of the first linear engravings (221) may be formed round or flat, but the shape is not particularly limited. Each plate-shaped imitation 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 first linear engraving (221) is displayed in the image.

[0043] Additionally, a plurality of second linear indentations (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 evaluation of the image device in the invention of the second embodiment, the first linear indentation (221) and the second linear indentation (222) are formed in mutually orthogonal directions on a horizontal plane.

[0044] Multiple first linear indentations (221) may have different depths from one another. Likewise, multiple second linear indentations (222) may have different depths from one another. The spacing between multiple first linear indentations (221) and the spacing between multiple second linear indentations (222) may be approximately 0.2 mm. The indentation portion (220) may be formed by a cutting process including milling or a press-fitting process, but is not limited thereto, and a plate-shaped imitation member (210) having the indentation portion (220) may be manufactured integrally by casting or 3D printing.

[0045] Referring to FIGS. 3 and 4, an intaglio portion (220) is formed on the upper surface of each plate-shaped imitation member (210), and a convex portion (230) that fits into the intaglio portion (220) of another plate-shaped imitation member (210) may be formed on the lower surface of each plate-shaped imitation member (210). When plate-shaped imitation members (210) of such shapes are stacked, the convex portion (230) of the plate-shaped imitation member (210a) stacked on the upper side thereof is inserted into the intaglio portion (220) of each plate-shaped imitation member (210b). Here, the plate-shaped imitation member (210b) located on the lower side may correspond to a tooth, and the convex portion (230) of the plate-shaped imitation member (210a) located on the upper side may correspond to a tooth restoration or dental calculus.

[0047] Hereinafter, a phantom for evaluating the performance of a dental imaging device according to the third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a transmission perspective view of a phantom (300) for evaluating the performance of a dental imaging device according to the third embodiment of the present invention. FIG. 6 is an example of the shape of an intaglio portion (320) according to the third embodiment of the present invention.

[0048] Referring to FIG. 5, a phantom (300) according to a third embodiment of the present invention has a mimic member (310) and an indented portion (320) indented from one side of the mimic member (310). Here, the mimic member (310) corresponds to the gingiva. The mimic member (310) may be formed of a material having physical properties similar to the gingiva, such as silicone. However, the material of the mimic member (310) does not correspond to this. The mimic member (310) may be made of, for example, a polymer.

[0049] The simulation member (310) according to the third embodiment has one side that is vertically oriented and another side that slopes downward toward the outside. Through the image captured according to depth from the sloped other side, the quality of the implant image according to depth can be evaluated. Through the image according to depth of the one side that is vertically oriented, the quality of the implant image at the same depth can be evaluated.

[0050] The intaglio portion (320) according to the third embodiment includes a spiral intaglio (321) extending from the upper surface of the imitation member (310) downward. This intaglio corresponds to a screw groove-shaped perforation formed in the gingiva by an implant screw.

[0051] The shape of the screw threads of the implant screw may vary depending on the product type. Referring to FIG. 6(a), the radius outer end (G1) of the spiral rotation cross-section of the spiral indentation (321) may have a triangular shape. This shape of the indentation (320) corresponds to a perforation in the gum where the implant screw having a triangular spiral rotation cross-section is implanted. Referring to FIG. 6(b), the radius outer end (G2) of the spiral rotation cross-section of the spiral indentation (321) may have a trapezoidal shape. This shape of the indentation (320) corresponds to a perforation in the gum where the implant screw having a trapezoidal spiral rotation cross-section is implanted. In addition, the shape of the indentation (320) may be formed to correspond to any other type of implant screw available on the market.

[0053] Hereinafter, a phantom (400) for evaluating the performance of a dental imaging device according to the fourth embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a transmission perspective view of a phantom (400) for evaluating the performance of a dental imaging device according to the fourth embodiment of the present invention.

[0054] Referring to FIG. 7, a phantom (400) according to the fourth embodiment of the present invention includes a simulated member (410), an indented portion (420) indented from one side of the simulated member (410), and an implant screw (430) fitted into the indented portion (420).

[0055] The imitation member (410) corresponds to the gingiva. The imitation member (410) may be formed of a material with physical properties similar to the gingiva, such as silicone. However, the material of the imitation member (410) does not correspond to this. The imitation member (410) may be made of, for example, a polymer.

[0056] The simulation member (410) according to the fourth embodiment has one side that is vertically oriented and another side that slopes downward toward the outside. Through the imaging of the depth from the inclined other side, the quality of the implant image according to depth can be evaluated. Through the image according to depth of the one side that is vertically oriented, the quality of the implant image at the same depth can be evaluated.

[0057] The engraved portion (420) according to the fourth embodiment includes a spiral engraving extending from the upper surface of the imitation member (410) downward. This engraving corresponds to a screw groove-shaped perforation formed in the gingiva by an implant screw (430) and may have a shape that fits the implant screw (430) inserted into the engraved portion (420).

[0058] In the fourth embodiment, a commercially available implant screw (430) can be fitted into the engraved portion (420).

[0060] At least a portion of the phantom (100, 200, 300, 400) according to each of the above-described embodiments may be formed of silicon or PDMS.

[0061] Additionally, in the embodiments described above, the imitation member (110, 210) corresponding to the tooth may have a first part made of a first material and a second part made of a second material different from the first material. Here, at least a portion of the first part may be accommodated within the second part. That is, the second part may cover at least a portion of the first part from the outside. The first part and the second part may be fixedly coupled to each other.

[0063] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention. Accordingly, the present embodiment is intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiment. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0065] 100,200,300,400: Phantom for dental imaging device performance evaluation 110,210,410: Copying 310: Plate-type replica member 120,220,320,420: Engraved part 430: Implant Screw

Claims

Claim 1 A phantom for evaluating the performance of a dental imaging device, comprising: a phantom member; and an intaglio portion recessed from one surface of the phantom member, wherein the intaglio portion comprises a plurality of first linear intaglios spaced apart from each other in a first direction on a horizontal plane and having mutually different widths; and a plurality of second linear intaglios spaced apart from each other in a first direction on a horizontal plane and having mutually different widths, arranged in a direction intersecting the plurality of first linear intaglios, and further comprising a plurality of plate-shaped phantom members stacked along a height direction, wherein each of the plate-shaped phantom members has the plurality of first linear intaglios and the plurality of second linear intaglios, wherein the intaglio portion is engraved on the upper surface of each of the plate-shaped phantom members, and a convex portion formed on the lower surface of each of the plate-shaped phantom members that fits into the intaglio portion of another plate-shaped phantom member. Claim 2 In claim 1, the above-mentioned engraved portion is a phantom for evaluating the performance of a dental imaging device having a plurality of continuous stepped portions. Claim 3 A phantom for evaluating the performance of a dental imaging device, wherein, in paragraph 2, the plurality of stepped portions are formed to be inclined downward toward the horizontal center of the simulation member. Claim 4 delete Claim 5 delete Claim 6 In claim 1, the plurality of first linear indentations have different depths from each other, forming a phantom for evaluating the performance of a dental imaging device. Claim 7 In paragraph 6, the plurality of second linear indentations have different depths from each other, forming a phantom for evaluating the performance of a dental imaging device. Claim 8 delete Claim 9 delete Claim 10 A phantom for evaluating the performance of a dental imaging device, wherein, in claim 1, the imitation member has one side oriented vertically and the other side sloping downward toward the outside, and the intaglio portion includes a spiral intaglio extending from the upper surface of the imitation member downward. Claim 11 A phantom for evaluating the performance of a dental imaging device, wherein, in item 10, the outer radial end of the spiral rotation cross-section of the spiral intaglio has a triangular shape. Claim 12 A phantom for evaluating the performance of a dental imaging device, wherein, in item 10, the outer end of the radius of the spiral rotation cross-section of the spiral intaglio has a trapezoidal shape. Claim 13 A phantom for evaluating the performance of a dental imaging device, comprising, in item 10, an implant screw that fits into the aforementioned engraved portion. Claim 14 A phantom for evaluating the performance of a dental imaging device according to claim 1, wherein at least a portion thereof is formed of silicone or PDMS.

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