KR20200077734A - Protector for photographing a medical image - Google Patents

Abstract

The present invention relates to a protector for photographing a medical image which can effectively protect a specific body portion of a patient with high radiation sensitivity such as the breasts or thyroid of a woman, crystalline lenses, and genital glands during medial image examination such as computed tomography (CT) examination or general photographing examination and fluoroscopy by providing a protector for photographing a medical image manufactured based on a lead equivalent to have accurate shielding efficiency in accordance with a radiation level for each patient and a radiation device having a variety of energy (quality). According to the present invention, the protector for photographing a medical image comprises a shielding means including a contrast material and a spacing member attached to the lower surface of the shielding means to separate the shielding means from a body portion by a prescribed distance. The shielding means (10) has a lead equivalent (mmpb) of 0.03-0.15 mmpb.

Description

Protector for photographing a medical image}

The present invention relates to a protective device for imaging medical images, and more specifically, computerization using a shielding means containing a contrast material capable of shielding radiation to minimize radiation exposure to a target organ that is sensitive to radiation when irradiating the same radiation dose to the body. During CT imaging or CT imaging, medical imaging such as fluoroscopy, specific body parts of patients with high radiation sensitivity, such as the breast, thyroid, lens, and gonads of women, can be effectively protected, and the shielding surface As the gap maintaining member is provided, the streak artifact that can be caused by the shielding means (the phenomenon of difficulty in reading the image due to the occurrence of artificial shade due to the difference in the radiation absorption rate) minimizes the image, allowing accurate image reading. Of course, it relates to a protective device for medical image taking so that a space that can be absorbed by the scattering line generated by the shielding means can be absorbed into the air.

Of all the radiation exposed to us, natural radiation is about 85%, and most of the radiation is exposed by medical radiation such as X-ray examinations. Imaging medical examination using radiation in medical institutions secures legitimacy for action and uses it in the medical field. Doing.

In addition, it is recommended that the dose received by the patient is minimized while obtaining optimal images according to the concept of As Low As Reasonably Achievable (ALARA) recommended by the International Commission on Radiological Protection (ICRP). Medical images using radiation are those that use the transmittance of radiation. To make images using radiation, radiation exposure is inevitable. Therefore, the necessity of radiation protection has emerged, especially in areas of the human body that are particularly sensitive to radiation.

However, protective clothing for working workers such as radiologists who may be exposed to radiation is provided in various forms, but there is no protective equipment for protecting a specific area of the patient during CT imaging. In general, protective clothing using lead (Pb) having a high atomic number has been widely used to prevent exposure of workers who are likely to be exposed to radiation. However, in order to protect patients' specific body parts, when performing CT imaging while wearing an existing protective clothing, a streak artifact (streak artifact) occurs at a certain angle due to the difference in absorption between the surrounding area and the image due to artificial shading. Due to the phenomenon of difficult to read), it is impossible to read the image itself.

On the other hand, the contrast medium is usually injected into the stomach, intestinal tract, blood vessels, cerebrospinal cavity, joint cavity, etc. to ensure that tissues and blood vessels are well viewed during radiographic examinations such as magnetic resonance imaging (MRI) or computed tomography (CT). It is a substance that increases the contrast of images by artificially increasing the difference in X-ray absorption. By using it in a specific body part, the body part is clearly absorbed by X-rays when shooting CT, etc. It is a substance that improves the diagnostic value by allowing the lesion to be distinguished from the surroundings.

For reference, these contrast agents are generally divided into a negative contrast agent and a positive contrast agent. While the negative contrast agent transmits more X-rays than surrounding tissues and shows an image, the positive contrast agent absorbs more X-rays to display an image. Such positive contrast agents include contrast agents containing substances such as iodine or barium sulfate, and negative contrast agents include air, carbon dioxide, and carbon dioxide.

In order to prevent the exposure of workers who are likely to be exposed to radiation recently, to prevent the exposure of existing protective clothing made of lead (Pb), the weight of the protective clothing is considerable, so that the problem of musculoskeletal disease caused by the weight of the protective clothing can be solved when worn for a long time For this purpose, protective clothing has been proposed to focus on absorbing and blocking iodine or barium sulfate, which is used as a raw material for contrast agents, but 100% of radiation is obtained when CT is taken by wearing a protective clothing using iodine or barium sulfate to a patient. Since it is made for the purpose of blocking, there is a problem in that it is impossible to obtain a body image, or it is impossible to read the image due to the streak artifact as in the case of lead (Pb) protective clothing.

In order to solve this, the applicant of the present invention has a contrast medium pad filled with a contrast agent in the Republic of Korea Registered Patent Publication No. 10-1751202,'Primary radiation chapegu using contrast medium', and is attached to the bottom surface of the contrast agent pad to attach the contrast agent pad to a body part. A space keeping member spaced apart from a predetermined distance therefrom, and an adhesive means provided on the bottom surface of the space keeping member to position and fix the space holding member on the body, further include a core material inside the contrast agent pad, wherein the contrast agent pad is placed on the body. A primary radiation shield using a contrast agent, which is characterized in that it is formed in a flat plate shape so that its thickness can be kept constant when deformed according to flexion, is also proposed, and also disclosed in Korean Patent Publication No. 10-2018-009623,'Medical The protective equipment for image shooting' proposed a protective device for medical imaging that includes a shielding means containing a contrast material and a gap maintaining member that is attached to the bottom surface of the shielding means to space the shielding means a predetermined distance from a body part. No. 10-2018-009623 In the'protective device for medical image shooting', the shielding material includes a contrast material on the inside and the shielding means provided with an outer covering so that the shielding material can be closed on the outside, and is attached to the bottom of the shielding means. There has also been proposed a protective device for taking a medical image that includes a space keeping member that spaces a shielding means a predetermined distance from a body part.

On the other hand, in general, the diagnostic radiation generator used in a medical institution is a device used to diagnose a disease using radiation, such as a diagnostic X-ray device, a diagnostic X-ray generator, a dental diagnostic X-ray generator, a computed tomography device, a breast imaging device, etc. It is a device that generates radiation and is used to diagnose diseases. It is defined in the safety management rules for diagnostic radiation generators, and the energy (quality) used for radiation generating devices used in medical institutions is 10kvp to 200kvp, depending on the purpose or method of use. In the case of primary radiation shields made of existing published inventions or protective equipment for medical imaging using various energy (quality), even if the same product is used for each radiation generating device having various energy (quality), the radiation absorption rate There is a problem that a difference occurs. In addition, since the energy (quality) used varies according to the site to be examined and the age to be tested in the computed tomography device, a shielding pad having a radiation absorption rate of 10% to 40% according to the site and age is manufactured and used differently. Because it has to be done, it is necessary to manufacture shielding pads of various standards, and it is also difficult for radiologists who perform CT examinations in medical institutions to select the proper shielding pad according to the radiation dose for each patient because the criteria are not clear to obtain the optimal shielding effect. There was also.

Republic of Korea Patent Registration Publication No. 10-1751202 (2017.06.21) Republic of Korea Patent Publication No. 10-2018-0096253 (2018.08.29) Republic of Korea Patent Publication No. 10-2015-0009812 (2015.01.27)

Therefore, the present invention is to provide a protective device for medical imaging, which is manufactured on the basis of lead equivalent to have a radiation device having various energy (quality) and an accurate shielding efficiency according to radiation dose for each patient, and computed tomography (CT) examination or general imaging. It is an object of the present invention to provide a protective device for medical imaging that can effectively protect a specific body part of a patient with high radiation sensitivity, such as a woman's breast, thyroid, lens, and gonads, during medical imaging tests such as examination and fluoroscopy.

In addition, as the spacing member is provided on the bottom surface of the shielding means, the streak artifacts that may be caused by the shielding means (a phenomenon that causes difficulty in reading images due to the occurrence of artificial shade due to a difference in radiation absorption rate) are minimized. It is an object of the present invention to provide a protective device for medical image taking, which enables accurate image reading, as well as a space in which some radiation not absorbed by the shielding means can be absorbed into the air.

In order to achieve the above object, the present invention provides a shield for medical imaging including a shielding means containing a contrast material and a space keeping member attached to a bottom surface of the shielding means to space the shielding means a predetermined distance from a body part, Shielding means 10 provides a protective device for medical imaging, characterized in that the lead equivalent (mmpb) is 0.03 mmpb to 0.15 mmpb.

In addition, the bottom surface of the gap holding member is characterized in that the gap holding member is further provided with an adhesive means for fixing the position on the body.

In addition, the spacing member is characterized in that it is made of a porous sponge having a density similar to that of air.

In addition, the thickness of the gap holding member 20 is characterized in that it is formed of 1 to 10mm.

According to the protective device for medical imaging according to the present invention, first, a radiation device having various energy (quality) and a protective device for medical imaging that are manufactured based on lead equivalents to have accurate shielding efficiency according to radiation doses for each patient are computed tomography. (CT) In the case of medical imaging tests such as CT scans, general imaging tests, and fluoroscopy, there is an advantage that a specific body part of a patient with high radiation sensitivity, such as a woman's breast, thyroid, lens, and gonads, can be effectively protected.

Second, as the gap-holding member is provided on the bottom of the shielding means, the streak artifact that can be caused by the shielding means (a phenomenon that causes difficulty in reading images due to the occurrence of artificial shade due to the difference in radiation absorption rate) is minimized. It has the advantage of being able to read images.

Third, a space in which scattered rays generated by the shielding means can be absorbed into the air can be secured, thereby preventing radiation exposure due to scattered rays and strick artifacts of the image.

1 is a perspective view of a protective device for medical imaging according to an embodiment of the present invention
2 is a conceptual diagram of a protective gear for medical imaging according to an embodiment of the present invention
Figure 3 is a schematic diagram of the device for the experiment according to the lead equivalent standard and the thickness of the gap maintaining portion according to the present invention
Figure 4 is a comparison image according to the lead equivalent of the medical image protection device according to an embodiment of the present invention.
5 and 6 is an image comparison diagram according to the thickness of the spacing member of the protective equipment for medical imaging according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this is to explain in detail that the person having ordinary knowledge in the technical field to which the present invention belongs can easily implement the invention, and thus does not mean that the technical spirit and scope of the present invention are limited.

1 is a perspective view of a protective device for medical imaging according to an embodiment of the present invention, FIG. 2 is a conceptual diagram of a protective device for medical imaging according to an embodiment of the present invention, and FIGS. 3 to 5 are exemplary embodiments of the present invention It is a comparative image according to the thickness of the gap-holding member of the protective equipment for imaging medical images.

The protective device for medical imaging according to an exemplary embodiment of the present invention includes a shielding means containing a contrast material, and a gap maintaining member attached to a bottom surface of the shielding means to space the shielding means a predetermined distance from a body part.

Hereinafter, with reference to Figures 1 and 2 will be described in detail with respect to the connection relationship between the components and the components of the protective device for medical imaging 1 according to an embodiment of the present invention.

First, the shielding means 10 according to the present invention aims to minimize the exposure of the patient to radiation by using the properties of the contrast material to which radiation is absorbed. More specifically, in the case of some heading organs that irradiate the same radiation dose in the 360-degree omnidirectional direction of the body when computed tomography (CT) imaging is performed, the minimum radiation dose to secure the captured image is to be irradiated. . That is, the shielding means 10 selectively reduces the amount of radiation required by the primary radiation generated from the X-ray tube to reduce radiation exposure (through shielding through absorption of radiation) and transmits it. It is to reduce the dose of organs. Therefore, the shielding means 10 according to the present invention is manufactured so that the contrast material can selectively absorb radiation from the primary radiation generated from the X-ray tube (Tube), in various forms such as a sponge, a fabric pad, etc. Can be manufactured. At this time, as a contrast material 12 included in the shielding means 10 used, iodine capable of absorbing radiation or barium sulfate (BaSO ₄ ) may be representative, and other substances capable of absorbing radiation may be iodine. ) Or barium sulfate (BaSO ₄ ).

In addition, the above-described shielding means 10 is manufactured to be deformable to fit the body flexure and is formed in an eight-character shape shown in the drawing, and can be deformed in various shapes in addition, and the thickness refers to the thickness of the spacing member described later. It is preferably formed to 1mm to 20mm.

In addition, the above-mentioned shielding means 10 is preferably manufactured to selectively absorb the amount of radiation irradiated toward the body during a medical imaging test such as a computed tomography (CT) test or a general imaging test or fluoroscopy. This is because primary radiation that is not absorbed must be transmitted through the body for computed tomography (CT) imaging of the body. At this time, if the primary radiation according to the lead equivalent of the shielding means 10 has too little absorption, there is a problem of not reducing the amount of radiation exposed to body parts sensitive to radiation, and the primary radiation according to the lead equivalent of the shielding means 10 This is because there is a problem in that if the amount of absorption is too large, the image of the patient to be secured for actual computed tomography (CT) cannot be obtained.

On the other hand, a gap maintaining member 20 is attached to the bottom surface of the above-mentioned shielding means 10, and the gap maintaining member 20 allows the above-described shielding means 10 to be spaced apart from a body part by a predetermined distance, thereby obtaining a body part to be photographed. And it serves to secure a space between the shielding means (10).

That is, as illustrated in FIG. 2, when the shielding means 10 is formed without the gap maintaining member 20, the primary radiation reaching the shielding means 10 collides with the shielding means 10 and scattering lines are generated. . The scattering line generated at this time has low energy and lacks straightness, so it moves in a different direction, unlike the primary radiation. This scattering line causes a streak artifact in the captured image and affects the accuracy, resulting in an inaccurate image. Is done. Therefore, the higher the ratio of the scattering line, the more the accuracy of the captured image is deteriorated.

Therefore, the above-described gap maintaining member 20 is further provided so that the scattering lines generated by the shielding means 10 can be absorbed into the air before reaching the body so that the scattered lines do not affect the captured image. Streak artifacts that may occur in an image may be prevented. It is because the second scattering line may be generated as the gap maintaining member 20, and it is preferable to use a porous sponge having a density similar to that of air. In addition, in the case of the spacing member, the thickness should be 1 to 10 mm. As can be seen in the experiments described below, if it is less than 1 mm, streak artifacts may occur in the captured image due to the scattering lines generated by the shielding means 10, and if it exceeds 10 mm, the gap maintaining member is too thick This is because, due to the elasticity, there is a problem in that it is not closely fixed to the patient or the radiation exposure amount cannot be kept constant.

In addition, an adhesive means 30 is further provided on the bottom surface of the gap maintaining member 20, which serves to keep the shielding means 10 and the gap maintaining member 20 positioned on the body. . The adhesive means 30 includes an adhesive tape 31 attached to a body part and a release paper 32 separated from the adhesive tape 31 when used. The adhesive tape 30 may be used as in the present invention, but any adhesive can be used as long as it can adhere to the body.

From here, the effect of the medical imaging device 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

First, FIG. 3 is a schematic diagram of a device for an experiment according to the lead equivalent standard and the thickness of a gap maintaining part according to the present invention, and after preparing the shielding means 10 and the gap holding member 20 prepared for the experiment of the present invention, in CT equipment A pure acrylic hair phantom (P, polymethyl methacrylate, PMMA) was placed in the center of the CT machine and axial scan was performed with 120 kVp, 250 mAs, and 5mm slice. And after connecting the radiation dose detection device M to the phantom P, the shielding means 10 for each equivalent of lead, the presence or absence of the spacing member 20, and the imaging and reduction of radiation dose according to the thickness of the spacing member 20 The effect was measured.

In addition, the shielding means 10 for each equivalent of lead was prepared using barium sulfate (BaSO ₄ ) as a contrast material, and the shielding means 10 prepared by mixing synthetic resin and barium sulfate (BaSO ₄ ) in a certain amount has various thicknesses. Through this, it was manufactured to have lead equivalent of each experimental reference value. For reference, the lead equivalent refers to the thickness of lead showing an attenuation equivalent to the attenuation of the dose rate representing the substance under the same conditions, and the unit is mmpb.

The experimental shielding means 10 according to the present invention measures the X-ray attenuation rate of the shielding means 10 and compares it with the X-ray attenuation curve according to the thickness of the standard lead plate to determine the sample's lead equivalent (mmpb) using X The lead equivalent was measured based on -ray ISO NS 100 (half layer: 1.11mm Cu average energy: 83keV).

(Radiation Quality: X-ray ISO NS 100 (Half layer 1.11 mm Cu, average energy 83keV))

Experimental shielding means 10 according to the present invention was manufactured to have a predetermined lead equivalent (mmpb) for the experiment, [Table 1] shows the thickness change of the shielding means 10 according to each lead equivalent (mmpb) It is a ticket.

FIG. 4 is an image of a pure acrylic hair phantom taken from a CT device, and the first image is an image taken without a shield, and the second image is a lead equivalent of 0.01 mmpb, the third image is a lead equivalent of 0.03 mmpb, and the fourth image is 0.06 mmpb of lead equivalent, 0.09 mmpb of lead equivalent for image 5, 0.12 mmpb of lead equivalent for image 6, 0.15 mmpb of lead equivalent for image 7, 0.18 mmpb of lead equivalent for image 8, and 0.21 mmpb of lead equivalent for image 9 It is an image taken by using the shielding means (10). At this time, the gap-holding member used was manufactured with a thickness of 20 mm and photographed on the same basis.

[Table 2] is a table showing the effect of reducing the radiation dose of the shielding means 10 according to the lead equivalent.

Looking at the image 1 according to Figure 4, the shielding means 10 and the distance maintaining member 20 is taken without the streak artifact phenomenon is generated, there is an effect that can be read accurately. However, in the absence of the shielding means 10 and the gap maintaining member 20 according to the present invention, there is a risk that a part of the patient's body may be exposed to radiation exposure due to the added radiation dose in addition to the minimum radiation dose for securing an image. .

The second image was taken using a shielding means (10) with a lead equivalent of 0.01 mmpb, which has the effect of enabling accurate image reading because streak artifact does not occur, while reducing the dose of radiation as shown in [Table 2]. Since only 2.3%, the effect of preventing radiation exposure in patients is insignificant.

The 3rd image was taken using the shielding means 10 with a lead equivalent of 0.03 mmpb. As a result of no artifact like the 2nd image with a lead equivalent of 0.01 mmpb, a clear image capable of image reading can be obtained and the dose of radiation is reduced. The effect is also 9.2%, so it is considered that there is a significant dose reduction effect.

The 4th image was taken using the shielding means 10 with a lead equivalent of 0.06 mmpb, and there is a very fine streak artifact that is not visually confirmed, but it is possible to obtain an image that does not interfere with image reading. The radiation dose reduction effect is also excellent at 19.6%.

The 5th and 6th images were taken using the shielding means 10 with lead equivalents of 0.09 mmpb and 0.12 mmpb, respectively. Although the strick art fact phenomenon is visible on the upper part of the image, there is no problem in reading the image. In addition, it is judged that the radiation dose reduction effect is 28.1% and 39.9%, respectively.

The 7th image was taken using a shielding means 10 with a lead equivalent of 0.15 mmpb, and the radiation dose reduction effect was 52.9% very high, while the streak art fact phenomenon gradually expanded to the entire top of the image. Therefore, it may be impossible to read in the case of superficial organs such as the eyeball, but in the case of intrinsic organs such as the heart, it is judged that image reading is possible.

Images 8 and 9 were taken using shielding means 10 with lead equivalents of 0.18 mmpb and 0.21 mmpb, respectively, and the radiation dose reduction effect was 65.1% and 81.4%, respectively. It is judged that image reading is impossible even in the intrinsic growth period. Moreover, if the lead equivalent is 0.24 mmpb, it will be difficult to secure a practical medical image because it corresponds to a radiation dose reduction effect of 90.2%.

5 and 6 are image comparison diagrams according to the thickness of the gap-holding member of the protective device for medical imaging according to an embodiment of the present invention. FIG. 5 is an image of a phantom P obtained by varying the thickness of the spacing member 20 based on the shielding means 10 having a lead equivalent of 0.06 mmpb.

The image 1 in FIG. 5 is taken using a 1 mm thick gap-holding member 20 between the shielding means 10 and the phantom P, and the images 2 to 6 are angle gap-holding members 20 3mm. 6mm, 9mm and 11mm was kept and photographed. As can be seen in FIG. 5, since the gap holding member 20 is included between the shielding means 10 and the phantom P, a clear image can be secured.

On the other hand, Figure 6 is an image of the head of the body by varying the thickness of the spacing member 20 for the shielding means 10 having a lead equivalent of 0.06 mmpb.

The 1st image in FIG. 6 is taken using a 1mm thick spacer 20 between the shielding means 10 and the head, and the 2nd to 6th images are 3mm each for the spacer 20. 6mm, 9mm and 11mm was kept and photographed. As can be seen from each image of FIG. 6, it was possible to ensure that a clear image as shown in FIG. 5 was secured.

However, the space keeping member 20 according to the present invention is preferably a porous sponge having a density similar to air as described above, due to the nature of the head, a number of curved surfaces are formed on the face, so the space keeping member 20 Even if the adhesive means 30 is attached to the bottom surface of the sponge, there is a disadvantage that it is not closely fixed to the head due to the restoring force of the sponge.

6 mm thickness interval maintaining member 20 from the fourth image to see the image taken using the interval maintaining member 20 having a thickness of 9 mm and 11 mm respectively, both ends of the shielding means 10 from the head You can see that the space apart is getting wider. This is for the temporary fixing during the case of the adhesive means 30 included in the bottom surface of the gap maintaining member 20 according to the present invention, since the adhesive force is very low, the thickness of the gap maintaining member 20 becomes increasingly thick. Due to the characteristics of the collecting sponge, the restoring force is increased, and the restoring force becomes larger than the adhesive force of the adhesive means 30 on the bottom surface of the gap maintaining member 20, resulting in a problem in which the adhesive means 30 that are gradually becoming part of the body are separated. . In order to prevent this, the adhesive means 30 of the gap holding member 20 may be coated with a stronger adhesive, but in this case, there is a problem that may cause discomfort to the patient in the process of attachment and detachment after attachment to the body. .

Therefore, when the thickness of the gap holding member 20 exceeds 11 mm, due to its restoring force, the gap between the shielding means 10 and the phantom P is not constant, and in this case, the protective film for medical imaging according to the present invention is photographed. It is preferable that the thickness of the gap-holding member 20 does not exceed 11 mm, as it is difficult to fix the body closely to the body or there is a problem that the radiation exposure amount cannot be kept constant.

Although some embodiments have been exemplarily described above, the fact that the present invention can be embodied in various other forms without departing from its spirit and scope is obvious to those skilled in the art. Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and all implementations within the scope of the appended claims and equivalents thereof will be included within the scope of the present invention.

1: Protective equipment for medical imaging
10: shielding means
11: Outer shell
20: gap maintaining member
30: adhesive means
31: adhesive tape
32: release paper

Claims (4)

Shielding means 10 containing a contrast material and the shielding means 10 is attached to the bottom surface of the shielding means 10, the shielding means 10 is spaced apart from the body part by a predetermined distance member 20 for medical imaging equipment In,
The shielding means (10) has a lead equivalent (mmpb) of 0.03 mmpb to 0.15 mmpb medical imaging equipment, characterized in that.
The method according to claim 1,
Protective device for medical imaging, characterized in that further provided with an adhesive means (30) for positioning the gap maintaining member (20) on the bottom surface of the gap maintaining member (20).
The method according to claim 2,
The gap holding member 20 is a protective device for medical imaging, characterized in that it is made of a porous sponge having a density similar to that of air.
The method according to claim 3,
The thickness of the gap-holding member 20 is a protective device for medical imaging, characterized in that formed from 1 to 10mm.

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