KR20220001882A - Replacing bone density standard phantom of bone density simulating block and Bone density sandard pantom Assembly asembled therewith - Google Patents

Abstract

The present invention relates to a standard phantom for medical images and, more specifically, to a standard bone density phantom capable of replacing a bone density simulating block, in which a bone density simulating block is replaced easily and conveniently, and a standard bone density phantom assembly assembling the same. To this end, the standard phantom for medical images comprises: a bone density simulation block (200) including a bone density simulation material; a first block (120) including a first accommodation groove (130) in which at least a part of the bone density simulation block (200) is accommodated to be replaced; and a second block (150) including a second accommodation groove (170) shape-fitted with the first block (120) and accommodating the remaining part of the bone density simulation block (200) to be replaced.

Description

Replacing bone density standard phantom of bone density simulating block and Bone density sandard pantom Assembly assembled therewith

The present invention relates to a standard phantom for medical imaging, and more particularly, to a standard bone density phantom that can be replaced with a bone density imitation block, and a standard bone density phantom assembly incorporating the same.

MEDICAL PHANTOM is a model that simulates the physical properties of the whole or part of the human body. It is used for various purposes and in various forms such as performance evaluation of diagnostic and treatment devices, medical image quality evaluation, dosimetry, and interventional training and evaluation. do. In particular, since the physical mechanism of image acquisition is different depending on the imaging device and the size and shape of the imaging device are different, there are currently dedicated phantoms with various shapes and properties.

In other words, medical phantoms have to be manufactured in various shapes to suit various sizes and shapes of imaging devices, and in the end, the phantoms are inevitably limited by the characteristics of the devices.

Moreover, in order to make a phantom in a shape similar to a human body, it must be made in a size similar to the human body, and because the medium is put in it, it is heavy and there are many difficulties in operation.

After all, by applying the above concept to a medical phantom, a phantom can be configured in units of voxels, and the best implementation of this is a phantom using Lego blocks. In the past, there was a case where a brick, the unit block of Lego, was combined to form a phantom of a certain shape, and then used to evaluate the performance of an imaging device. Moreover, there was a technical requirement that a medium with specific physical properties was needed inside the block even for image evaluation and dosimetry.

In particular, the bone density phantom is mainly used for calibration of a dual energy X-ray absorptiometry (DEXA scan) system.

1A and 1B are real pictures of a conventional bone density phantom. 1A and 1B, the conventional bone density phantom includes a bone density phantom of varying thickness inside the solidified synthetic resin block. And, it could only be used as a single product, and it was impossible to replace the bone density phantom or to adjust the thickness. Therefore, it was cumbersome to have several models for each set, and it was very expensive (about 10 million won each).

2 is another real photograph of a conventional bone density phantom. As shown in FIG. 2 , a phantom whose bone density has already been determined in stages has no choice but to purchase, and the user cannot adjust or replace the thickness of the phantom at will or as needed.

3 is an example of an image of a conventional bone density phantom. Since imaging was performed using the conventional bone density phantom shown in FIGS. 1A to 2 , only an image having a predetermined shape as shown in FIG. 3 could be obtained. For this reason, the use, utilization, and research scope of the BMD did not deviate from the commercialized BMD Phantom. As a result, dissatisfaction with medical personnel, scholars, and researchers who tried to conduct various studies and experiments was high.

1. Republic of Korea Patent Registration No. 10-0739187 2. Republic of Korea Patent Registration No. 10-1856352

Therefore, the present invention has been devised to solve the above problems, and the problem to be solved by the present invention is to replace the bone density imitation block that can easily and conveniently replace the bone density imitation block in the bone density standard phantom. and to provide a standard bone density phantom assembly assembled therewith.

Another object of the present invention is to provide a standard bone density phantom that can be replaced with a bone density replica block that configures a standard bone density phantom like a Lego block to enable assembly and easy disassembly of various types and a standard bone density phantom assembly assembled therewith will do

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

In order to achieve the above technical problem, in the standard phantom for medical imaging, a bone density imitation block 200 including a bone density imitation material; a first block 120 having a first receiving groove 130 in which at least a portion of the bone density imitation block 200 is exchangeably accommodated; and a second block 150 having a second accommodating groove 170 that is shape-fitted with the first block 120 and replaceably accommodates the remaining portion of the bone density imitation block 200; A standard phantom for bone density that can be replaced with a bone density simulation block is provided.

Optionally, the bone density mimic material may include hydroxyapatite or gold (Au).

Also, the first block 120 and the second block 150 may include a water equivalent material or a tissue equivalent material, and the water equivalent material may include lucite or polystyrene.

In addition, at least one upper protrusion 110 is further formed to protrude from one surface of the first block 120, and the lower protrusion ( 192) and the inward projection 194 are formed to protrude further.

Optionally, four upper protrusions 110 are formed on the upper surface of the first block 120, and one lower protrusion 192 is formed in the center of the lower surface of the second block 150, and the inward protrusion 194 is formed. Eight pieces may protrude inward toward the lower protrusion 192 from the periphery of the second block 150 .

In addition, the bone density imitation block 200 may have a disk shape or a hexahedral shape.

In addition, the bone density of the bone density simulation block 200 is determined by the thickness (t) value in the direction in which the radiation 210 is irradiated.

In addition, the bone density is determined as a set having two to five values, and the bone density simulation block 200 may be a plurality of bone density simulation blocks 200 having a thickness t corresponding to each bone density.

In addition, the bone density has an areal bone mineral density (aBMD) value in the range of ^{0.6 g/cm 2} to 1.2 g/cm ^{2 .}

The object of the present invention as described above is another embodiment, in which a plurality of the aforementioned standard bone density phantoms 100 are stacked to form a standard bone density phantom assembly, and each of the standard bone density phantoms 100 has a different thickness (t). It can also be achieved by a standard bone density phantom assembly assembled with a standard bone density phantom, characterized in that the bone density simulation block 200 is accommodated.

Optionally, the thickness (t) of the bone density simulation block 200 varies in ascending or descending order along the stacked direction.

According to an embodiment of the present invention, it is possible to easily and conveniently replace the bone density replica blocks having different thicknesses in the standard bone density phantom. Therefore, it is possible to photograph the bone density standard phantom under various conditions.

In addition, the BMD standard phantom is configured like a Lego block, enabling various types of assembly and easy disassembly. Due to this, it is possible to actively cope with various measurement environments required in the medical field or clinical trial. This may increase the utility of the standard phantom. And, it is possible to greatly reduce the economic burden of purchasing and maintaining the phantom.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so the present invention is described in such drawings It should not be construed as being limited only to
1a and 1b is a real photograph of a conventional bone density phantom;
2 is another real photograph of a conventional bone density phantom;
3 is an example of an image of a conventional bone density phantom,
4 is a perspective view of a standard phantom 100 for bone density that can be replaced with a bone density imitation block according to an embodiment of the present invention;
Figure 5 is a bottom view of the standard bone density phantom 100 shown in Figure 4,
6 is an exploded perspective view of the standard bone density phantom 100 shown in FIG.
7 is a side view of a standard bone density phantom assembly completed by stacking and assembling a plurality of standard bone density phantoms shown in FIG. 4 .

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component. When a component is referred to as being “connected to” another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, "between" and "between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprise" or "have" are not intended to refer to the specified feature, number, step, action, component, part or any of them. It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms defined in general used in the dictionary should be interpreted as having the same meaning in the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Bone Density Standard Phantom (100)

Hereinafter, the configuration of the preferred embodiment will be described in detail with reference to the accompanying drawings. The bone density standard phantom 100 of the present invention may be used for Dual Energy X-ray Absorptiometry (DEXA scan). The DEXA scan is a test that measures the density of bones by irradiating two different types of X-rays. It is mainly used for diagnosis, treatment, and follow-up of osteoporosis.

4 is a perspective view of a standard phantom 100 for bone density that can be replaced with a bone density simulation block according to an embodiment of the present invention. As shown in Figure 4, the bone density standard phantom 100 has an approximately cube or cuboid shape, the first and second blocks 120 and 150 are assembled up and down, and the upper surface has four cylindrical upper projections 110. protrusion is formed.

The first block 120 and the second block 150 may include water equivalent materials, and the water equivalent materials may include lucite or polystyrene.

Also, the first block 120 and the second block 150 may include tissue equivalent materials, and the tissue equivalent materials may include (C ₅ H ₄ O ₁₈ N)n.

The first and second blocks 120 and 150 are manufactured by cutting by a numerical control machine tool or by injection molding by an injection machine.

5 is a bottom view of the standard bone density phantom 100 shown in FIG. As shown in Figure 5, the lower protrusion 192 is formed with one large protrusion in the center of the lower surface.

Eight inward protrusions 194 may protrude inwardly toward the lower protrusions 192 from the periphery of the lower surface of the second block 150 . The upper protrusion 110 is inserted between the lower protrusion 192 and the inward protrusion 194 to be assembled or disassembled by pulling it by hand. This allows several BMD standard phantoms 100 to be easily stacked or disassembled up and down.

6 is an exploded perspective view of the standard bone density phantom 100 shown in FIG. As shown in FIG. 6 , a second coupling part 145 is formed on the upper surface edge of the second block 150 to be fitted with the first coupling part 140 .

The second receiving groove 145 is recessed into the inside of the second block 150 so that the bone density simulation block 200 can be easily inserted or pulled out when pulled by hand. The second receiving groove 145 has a shape corresponding to the outer shape of the bone density imitation block 200, and can accommodate 1/3, 1/2, or 2/3 of the height of the bone density imitation block 200. is formed

A first coupling portion 140 may be formed on the lower edge of the first block 120 to be fitted with the second coupling portion 145 .

The first receiving groove 130 is recessed into the interior of the first block 120 so that the bone density simulation block 200 can be easily inserted or pulled out when pulled by hand. The first receiving groove 130 has a shape corresponding to the outer shape of the bone density imitation block 200, and can accommodate 1/3, 1/2, or 2/3 of the height of the bone density imitation block 200. is formed

Bone density imitation block 200 may be in the shape of a disk or a hexahedron (cube, cuboid). In particular, the surface to which the radiation 210 is vertically irradiated may have a shape consisting of a circle, an ellipse, a triangle, a square, a pentagon, a hexagon, or a combination thereof.

One bone density simulation block 200 has a constant thickness along the thickness (t) direction. In addition, different bone density imitation blocks 200 may be manufactured to have different thicknesses along the thickness (t) direction. For example, if the bone density is determined as a set having five values, the bone density simulation block 200 is manufactured with a thickness t corresponding to each bone density, and five are provided.

In this embodiment, the bone density has an areal bone mineral density (aBMD) value in the range of ^{0.6 g/cm 2} to 1.2 g/cm ^{2 .}

The bone density mimic block 200 is or includes a bone density mimic material, and the bone density mimic material includes hydroxyapatite or gold (Au).

Bone Density Standard Phantom Assembly

Hereinafter, the configuration of the preferred embodiment will be described in detail with reference to the accompanying drawings. 7 is a side view of a standard bone density phantom assembly completed by stacking and assembling a plurality of standard bone density phantoms shown in FIG. 4 .

As shown in FIG. 7 , four BMD standard phantoms 100 are stacked to form a BMD standard phantom assembly. Each bone density standard phantom 100 contains a bone density simulation block 200 having a different thickness (t).

In Figure 7, the uppermost bone density standard phantom (100a) is fitted with a bone density simulation block (200a) having a thickness (t1). And, the bone density simulating block 200b having a thickness t2 is inserted in the bone density standard phantom 100b sequentially in the downward direction, and the bone density simulating block 200c having a thickness t3 in the bone density standard phantom 100c (200c) This is sandwiched, and the bone density simulation block 200d having a thickness t4 is inserted into the bone density standard phantom 100d.

The thickness (t1, t2, t3, t4) of the bone density simulation block (200a, 200b, 200c, 200d) varies in ascending or descending order along the stacked direction. For example, as shown in FIG. 7 , t4 > t3 > t2 > t1. Optionally, the reverse order is also possible.

When the radiation 210 is irradiated from one side to the standard bone density phantom assembly prepared as shown in FIG. 7 , the radiation 210 passing through the standard bone density phantom assembly is incident on the imaging device 250 to generate image data. By signal processing such image data, an image as shown in FIG. 3 can be obtained.

Since the bone density standard phantom 100 of the present invention is shaped like a Lego block, it can be assembled on a plate (not shown) having an upper protrusion 110 to have various appearances.

In addition, as long as it is compatible in the form of a block, it can be freely combined with standard phantoms for other purposes, and various calibrations and inspections are possible with one shot.

The standard bone density phantom 100 according to the present invention can be manufactured at a very low price corresponding to 1/4 to 1/3 compared to the conventional standard phantom, and thus has economic feasibility.

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a way in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

100, 100a, 100b, 100c, 100d: Bone density standard phantom;
110: upper projection,
120: first block,
130: a first receiving groove;
140: a first coupling part;
145: second coupling part;
150: second block;
170: second accommodation home;
190: bottom,
192: lower projection,
194: introverted process,
200, 200 ㅁ, 200b, 200c, 200d: Bone density simulation block,
210: radiation;
250: image pickup device;
t, t1, t2, t3, t4: thickness.

Claims (12)

In the standard phantom for medical imaging,
Bone density imitation block 200 including a bone density imitation material;
a first block 120 having a first accommodating groove 130 in which at least a portion of the bone density imitation block 200 is exchangeably accommodated; and
A second block 150 having a second accommodating groove 170 that is shape-fitted with the first block 120 and replaceably accommodates the remaining portion of the bone density imitation block 200; Bone density standard phantom that can be replaced with a bone density simulation block. The method of claim 1,
The bone density mimicking material is a standard phantom for replacing the bone density mimicking block, characterized in that it comprises hydroxyapatite or gold. The method of claim 1,
The first block 120 and the second block 150 is a bone density standard phantom that can be replaced with a bone density imitation block, characterized in that it contains a water equivalent material or a tissue equivalent material. 4. The method of claim 3,
The water equivalent material is a standard phantom for bone density that can be replaced with a bone density mimic block, characterized in that it contains lucite or polystyrene. The method of claim 1,
At least one upper protrusion 110 is further formed to protrude on one surface of the first block 120, and
It is possible to replace the bone density imitation block, characterized in that on one surface of the second block 150, a lower protrusion 192 and an inward protrusion 194 are further protruded so that the upper protrusion 110 can be fitted and assembled. Bone Density Standard Phantom. 6. The method of claim 5,
Four of the upper protrusions 110 are formed on the upper surface of the first block 120 ,
One lower protrusion 192 is formed in the center of the lower surface of the second block 150,
The inward projection 194 is a replaceable bone density standard phantom of the bone density imitation block, characterized in that eight inwardly protrude from the periphery of the second block 150 toward the lower projection 192. The method of claim 1,
The bone density imitation block 200 is a standard phantom for bone density that can be replaced with a bone density imitation block, characterized in that it has a disk shape or a rectangular parallelepiped shape. The method of claim 1,
The bone density phantom of the bone density imitation block 200 is replaceable with the bone density imitation block, characterized in that determined by the thickness (t) value in the direction in which the radiation 210 is irradiated. 9. The method of claim 8,
The bone density is determined as a set having 2 to 5 values,
The bone density imitation block 200 is a bone density phantom that can be replaced with a bone density imitation block, characterized in that it is a plurality of bone density imitation blocks 200 having a thickness (t) corresponding to each bone density. The method of claim 1,
The bone density is 0.6 g/cm ² to 1.2 g/cm ² A bone density standard phantom that can be replaced with a bone density replica block, characterized in that it has an areal bone mineral density (aBMD) value in the range. A plurality of standard bone density phantoms 100 according to any one of claims 1 to 10 are stacked to form a standard bone density phantom assembly,
Bone density standard phantom assembly assembled with bone density standard phantom, characterized in that each of the bone density standard phantom 100 contains a bone density simulation block 200 having a different thickness (t). 12. The method of claim 11,
The thickness (t) of the bone density imitation block 200 is a standard phantom assembly for assembling a bone density standard phantom, characterized in that it varies in ascending or descending order along the stacked direction.

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