KR101510858B1 - Radiation Protection Equipment for Radiography - Google Patents

Abstract

The present invention effectively prevents the thyroid, which is a vulnerable target organs from radiation, not only in the radiography of the head as well as in the radiography of the chest, and also in the radiography of the panoramic radiography, artifacts are not formed in the thyroid gland to provide accurate diagnostic images.
In order to achieve the above object, according to the present invention, there is provided a thyroid gland comprising: a rear shield for shielding the back region of the neck region from radiation to protect the thyroid gland; a front shield for shielding the front region of the neck region from the radiation to protect the thyroid gland in front of the thyroid gland; A thyroid protective unit including the rear shield and the front shield, and a supporter worn on the human body to support the rear shield and the front shield; And a chest protection unit that shields the chest from the radiation and is detachable from the thyroid protective unit for chest radiography.

Description

[0001] Radiation Protection Equipment for Radiography [

The present invention relates to a radiological protection apparatus for protecting a human body during radiography, and more particularly, to a radiation protection apparatus for protecting a human body, To the radiological protection equipment which can be used even in the chest radiography while preventing the quality of the radiological image from being adversely affected.

Generally, X-ray equipment is an apparatus for imaging the inside of an object, that is, an anatomical structure, by sensing a radiation transmitted through a subject by a radiation detector, and is used for diagnosing a patient, Inspection and so on.

However, the radiation emitted from a radiation source (X-ray source) has a harmful effect on the human body. Even if a small amount of radiation is irradiated, the gene or the cell may be deformed, It is already known that it is important not to be exposed to excessive radiation or unnecessary radiation because the mutation is inherited to the next generation rather than being limited to one generation.

Therefore, it is important to protect the organs with anatomical structures irrespective of medical diagnosis or treatment, and to prevent radiation from being exposed to areas unnecessary for diagnosis.

On the other hand, the purpose of the radiological apparatus including the dental panorama (dental panorama) used in the dentistry is to measure the size and contour of the jaw (jaw bone), the anatomical variation of the bone along the vertical and horizontal axes (Dentist) with information on the pathological elements and procedures that may be present in the jaw, and the imaging information provided by the radiological apparatus may be used to determine the optimal procedure And to be able to induce long-term success after the procedure, can be very important for the process of establishing the treatment plan and for all subsequent processes.

Radiographic imaging is the method of acquiring images by irradiating X-rays to the anatomical structure of the region of interest. Most of the radiographic images are used for dental diagnosis or treatment. A panoramic x-ray image (hereinafter abbreviated as "panoramic image"), which is a planar (2D) image of an alveolar bone and a facial bone including a tooth, and a three-dimensional Computerized tomography (CT) images and cephalometric images taken from the front or side of the patient's head.

Particularly, panorama radiography, which is one of the external radiology methods which is mainly used in dental clinics, is one of the most widely used test methods for diagnostic radiography, and its usage rate has been increasing as the number of panoramic radiography equipment is increasing , Which is a high percentage of the population's exposure to radiation.

1 is a reference photograph showing an example of a panoramic image photographed in a normal photographing range, and the panoramic image has a photographing range including a cervical vertebra, an eyeball, a temporal bone, an upper / mandible and a hyoid bone.

In such various types of radiography, the thyroid located in the neck region is a target organ with a high possibility of developing cancer by radiation, so that appropriate radiation protection is required for the thyroid, and furthermore, , But the protection equipment that protects the patient from radiation is not properly equipped.

In addition, radiotherapy equipment that protects the thyroid and chest in cephalic radiography such as panoramic radiography or cephalometric radiography, exposes the chest to radiation and protects the thyroid gland, that is, cephalic radiography and chest radiography , But there is no such equipment.

In addition to patients with symptoms of lung cancer, pulmonary disease, pneumothorax, mediastinal tumors, and other various chest related diseases, radiography of the chest is performed for examination and preoperative evaluation. However, since the chest radiography is performed without taking any protection against the thyroid gland, the safety of the patient can not be effectively prevented from the risk of radiation. Therefore, it is a reality that the radiotherapy and chest radiography There is no radiological protection equipment considering all of the radiation protection equipment.

WO 2007/149363 (December 27, 2007) Korean Patent Publication No. 10-2009-0112988 (October 29, 2009)

It is an object of the present invention to provide a radiological protection device that can be commonly used not only for radiography of the head but also for radiography of the chest.

Another object of the present invention is to protect the organs which are vulnerable to radiation in cephalic radiography and chest radiography, and to provide artifacts to x-ray images (panoramic images) in cephalograms, for example, So that it is possible to minimize the formation of the radiation protection device.

Accordingly, the present invention can optimize the outer shape of the radiation protection device in the anterior and posterior parts of the neck to secure the positional stability of the neck and thyroid shielding membranes. It is easy to wear and adjust during radiography, The present invention provides a radiological protection device that can selectively perform additional shielding for a patient.

In order to achieve the above object, the present invention provides a method for protecting the thyroid gland, comprising the steps of: shielding the back side of the neck region from radiation for shielding the thyroid gland; shielding the front region of the neck region from the radiation to protect the thyroid gland in front of the thyroid gland A thyroid protective unit having a front shielding part, a rear shielding part and a front shielding part, and a supporter worn on the human body to support the rear shielding part and the front shielding part; And a chest protection unit that shields the chest from the radiation and is detachable from the thyroid protective unit for chest radiography.

And the chest protection unit is detachably attached to the thyroid protection unit. More specifically, the chest protection unit may be detachably coupled to the supporter.

A neck hole is formed in the thyroid protective unit so that the neck portion can be inserted or opened at one side. The supporter includes: And an opening / closing part provided at an edge of the neck hole so as to be openable / closable and opened to expand for expanding the neck hole.

The opening / closing part may include at least one of a left opening / closing part provided on the left side of the neck hole so as to be positioned on the left shoulder and a right opening / closing part provided on the right side of the neck hole to be positioned on the right shoulder.

One end of the opening / closing part is connected to the edge of the neck hole so that the edge of the neck hole is split, and the other end of the opening / closing part is closed to limit the opening length of the opening and closing part.

The supporter may have elasticity so that the neck hole is elastically expanded when the neck portion is inserted into the neck hole for wearing the thyroid protective unit on the human body.

Wherein the rear shield is provided to face the front shield and blocks the radiation in the left vertical line passing through the left outer ear and the right outer ear respectively in the vertical direction and the rear area of the right vertical line; The thyroid protection unit exposes the left side region and the right side region of the neck portion to radiation.

The left limit of the rear shield is a position that is 3 cm or more from the left vertical line to the rear along the circumferential direction of the neck portion, The right limit of the rear shield is a position at least 3 cm rearward along the circumferential direction of the neck at the right vertical line; And the upper limit of the rear shield is a range of 6 cm or less from the upper side of the cervical spine of the fourth cervical vertebra and / or the seventh cervical vertebra.

The rear shield may be provided on the supporter so as to block a range of up to 6 cm from the upper side of the cervical vertebrae of the fourth cervical vertebra and / or the seventh cervical vertebrae, and within a range of 8 cm to the left and right sides respectively.

Further, the rear shield may be configured to adjust the radiation shielding range or may be detachably attached to the supporter.

The effects of the thyroid gland for chest and chest radiography according to the present invention are as follows.

First, despite the explosive increase in radiography for examinations and evaluations before and after treatment, it has been reported that the cephalic radiography and chest radiography such as panoramic radiography of the dentistry, The patient's safety and burden of radiography can be reduced while securing the patient's safety from radiation damage.

Second, since the shielding range of the thyroid protection unit can be controlled, it is possible to positively cope with various body conditions and minimize the formation of artifacts according to patients (children, adults, women, etc.).

Thirdly, according to the present invention, not only is it possible to apply the present invention to all kinds of radiographs other than dental radiography such as intra-oral radiation, extra-lateral radiation, head standard radiography, computed tomography, etc. for protection of the thyroid, It is very useful because it is applicable to chest radiography for examination of tumor and other diseases.

In other words, it can protect the thyroid gland from radiation even during chest radiography, without causing problems in visualization of the area of interest, cervical vertebra, and airway, as well as panoramic radiography and out-of-scope radiography.

Accordingly, the present invention provides an accurate radiation image of the head and chest while effectively protecting the patient from the risk of radiation, as it becomes an essential radiation protection product in the general radiographic examination of the head and chest.

FIG. 1 is a view showing a panoramic radiographic image
2 is a front view showing a radiation protection equipment according to a first embodiment of the present invention;
Figure 3 is a rear view of the radiation protection equipment shown in Figure 2;
Figure 4 is an exploded view of the radiation protection equipment shown in Figure 2;
FIGS. 5A and 5B are side views showing the state that the radiation protection equipment shown in FIG. 2 is worn on the human body for cephalometric radiography
FIG. 6 is a side view showing the state that the radiation protection equipment shown in FIG. 2 is worn on the human body for chest radiography
FIGS. 7A to 7E are cross-sectional views illustrating a relationship between the radiation shielding range of the rear shield and the panoramic image,
8 is a view showing a radiation protection equipment according to a second embodiment of the present invention
9 is a perspective view schematically showing a front shielding portion and a rear shielding portion of a radiation protection equipment according to a second embodiment of the present invention.
Fig. 10 is a side view showing a state in which the radiation protection equipment of Fig. 8 is worn on the human body
11 is a developed view of a thyroid protection unit of a radiation protection device according to a third embodiment of the present invention.
Figure 12 schematically illustrates the rear shield of Figure 11,
13 is a sectional view taken along the line II in Fig. 11
14 is a rear view showing a rear shielding portion of a radiation protection equipment according to a fourth embodiment of the present invention

Best Mode for Carrying Out the Invention Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the embodiments of the present invention, the same reference numerals and symbols are used for the same components, and additional descriptions and duplicate descriptions thereof are omitted in the following.

Prior to the description of each embodiment, it is assumed that the front shielding portion, the rear shielding portion, and the chest shielding portion of the radiological protection device according to the present invention are constructed by applying, for example, lead or other radiation shielding material. The shield for covering the radiation shielding material is not shown. However, the rear shielding portion, the front shielding portion, and the chest shielding portion to which the radiation shielding material is applied may be covered with the outer covering of cloth or leather.

First, a first embodiment of the radiation protection equipment according to the present invention will be described with reference to Figs. 2 to 6. Fig.

[Example 1]

FIG. 2 is a front view showing a radiation protection apparatus according to a first embodiment of the present invention, FIG. 3 is a rear view of the radiation protection apparatus shown in FIG. 2, and FIG. 4 is a cross- It is an exploded view of radiation protection equipment. 5 is a side view showing a state in which the radiation protection apparatus shown in FIG. 2 is worn on the human body for cephalometric radiography, and FIG. 6 is a side view showing the radiation protection apparatus shown in FIG. And Fig.

2 to 6, a first embodiment of a radiological protection apparatus for radiography according to the present invention includes a thyroid protective unit 100 for protecting the thyroid gland and a thoracic protection unit 200 for protecting the thoracic gyri .

The thyroid protection unit 100 may include a rear shield 110 and a front shield 120 to be worn on the neck and may include the rear shield 110 and the front shield 120, Is provided on the protector base 130 and is supported by the protector base 130.

The protector base 130 is a supporter for supporting the rear shield 110 and the front shield 120 and for wearing the thyroid protective unit on the human body. Hereinafter, the protector base 130 is a supporter And the rear shielding part 110 and the front shielding part 120 are held in respective protected positions by the supporter 130. [

In the present invention, the rear shielding part 110 is mounted on the supporter 130 for protecting the thyroid gland, and is disposed at a rear part of the neck part, and shields the rear part of the neck part from radiation. The front shield 120 is disposed at a front portion of the neck portion to protect the thyroid from the front of the thyroid gland, that is, the front of the neck portion, and shields the front portion of the neck portion from radiation.

The rear shielding part 110 and the front shielding part 120 are provided to face each other on the supporter 130. When the supporter 130 is worn on a human body, Position.

In a typical dental panoramic radiography, the posterior shield 110 protects the thyroid from direct radiation irradiation directly from the back of the neck to the neck, and the front shield 120 is reflected or scattered by surrounding structures or walls That is, the thyroid can be protected from secondary radiation exposure.

Next, the chest protection unit 200 protects the anatomical structure of the chest, especially the inside of the chest, from the radiation by shielding the chest from radiation in a radiography in which acquisition of images on the chest is unnecessary. The thoracic protection unit 200 and the thyroid protection unit 100 can be separated from each other to protect the thyroid gland using the radiation protection unit according to the present invention.

Therefore, during the above-described chest radiography, the subject wears only the thyroid protective unit 100, exposes the chest to radiation, protects the thyroid gland, which is not related to radiographic imaging and is vulnerable to radiation, from radiation.

The chest protection unit 200 is detachably attached to the thyroid protection unit 100. In this embodiment, the chest protection unit 200 is detachably coupled to the supporter 130, that is, the base of the protector, and selectively installed Or separated.

More specifically, at the time of cephalometric radiography or other cephalometric radiography, the thyroid protection unit 100 and the chest protection unit 200 are both worn on the human body via the supporter 130, The thoracic protection unit 200 is detached from the thyroid protection unit 100.

The chest protection unit 200 includes a chest shield 210 and 220, which shields the front of the chest and / or the back of the chest to block radiation incident on the chest. Basically, the chest shield should be provided in a direction opposite to the radiation source, that is, at a portion where radiation directly enters.

In order to more reliably shield the chest from the radiation, the chest protection unit 200 includes a front chest shield 210 covering the front of the chest (fore chest) and a rear chest shield (not shown) covering the back of the chest 220).

More specifically, the front chest shield 210 blocks the radiation incident on the body (chest) from the front of the chest by hanging forward from the shoulder area, and the rear chest shield 220 is attached to the chest The back (back plate) is stretched to block the radiation incident on the back plate from the back of the chest.

The chest protection unit 200 performs radiation protection on the chest including the mediastinum and the lungs. In the present embodiment, the chest protection unit 200 includes the thyroid protection unit, particularly the supporter 130, And is fixed to the supporter 130 by means of fixing devices 141 and 142 such as Velcro and is fixed to the shoulder of both sides of the subject without physical connection to the thyroid protective unit 110 For example, a neck hole is formed at the center of the upper part, and it can be worn independently as in the case where a sleeve having no sleeves is worn on both sides.

As one specific example in which the chest protection unit 200 is detachably coupled to the supporter 130, an arm velcro is provided in any one of the chest protection unit 200 and the supporter 130, A structure in which a male Velcro is detachably attached to the arm velcro is provided.

A neck hole 101 is formed in the thyroid protection unit 100 so that the inner space can be expanded or the one side can be opened so that the neck is inserted. In the present embodiment, the neck hole 101 is formed at the center of the supporter 130, that is, the protector base.

The neck hole 101 may be an elastic structure that is elastically expanded as in the other embodiments described later. In this embodiment, however, the opening / closing part 150, which is selectively openable for expanding the neck hole 101, 130.

The opening and closing part 150 is configured to expand while allowing the neck hole 101 to be extended. When the opening and closing part 150 is closed, expansion of the neck hole 101 is restricted and the opening and closing part 150 is opened or opened The neck hole 101 can be expanded.

Of course, the opening / closing part 150 may be manufactured to have a structure in which one side of the neck hole 101 is completely opened, for example, a structure that is completely divided and separated from the edge of the neck hole to the outer edge of the supporter, The radiation protection equipment, particularly the thyroid protective unit 100, may also be worn.

In this embodiment, the thyroid-protective unit 100 is worn on the top of the head as if wearing a T-shirt or a necklace. The opening / closing part 150 is disposed at the edge of the neck hole 101 And is spliced together with the neck hole 101 for expansion of the neck hole 101.

One end of the opening and closing part 150 is connected to the edge of the neck hole 101 and is opened together with the neck hole when the neck hole 101 is extended. The other end of the opening and closing part 150 is closed The opening length of the opening / closing part 150 is limited.

In other words, the opening / closing part 150 can extend only a predetermined length from the edge of the neck hole 101, and a non-opening section exists between the other end of the opening / closing part 150 and the outer edge of the supporter 130. The opening and closing part 150 may be completely opened from the edge of the neck hole 101 to the outer edge of the supporter 130 so that one side of the neck hole 101 is fully opened as described above. It is possible.

More specifically, at least one opening / closing part 150 is provided in the supporter 130. In this embodiment, the left opening / closing part 151 provided on the left side of the neck hole 101, And a right opening / closing part 152 provided on the right side. Here, the left opening / closing part 151 is formed along the left shoulder line, and the right opening and closing part 152 is formed along the right shoulder line. However, the position of the opening and closing part 150 is not limited thereto.

On the other hand, the thyroid protective unit 100 is configured to shield the thyroid gland from various radiographic surveys. The thyroid gland protection unit 100 shields the thyroid gland from the posterior region and the anterior region of the cervix and shields both sides of the cervical region (left region and right region of the cervical region) Thereby minimizing artifacts caused by the thyroid protective unit in the dental paranasal image.

More specifically, the front shield 120 is configured to face the rear shield 110, and the left outer ring and the right outer ring are disposed in the left vertical line and the rear vertical region, respectively, .

The back shielding part 110 may be provided on the supporter 130 so as to block a range of up to 6 cm from the upper side of the cervical vertebrae of the seventh cervical vertebrae and a range of 8 cm to the left and right sides respectively.

Referring to FIG. 3, the shielding width W of the rear shield 110 is 9 cm or less, more preferably 8 cm or less, in each of the right and left sides along the circumferential direction of the neck portion at the rear center of the cervical vertebra, ) Of the cervical vertebrae is set to be within 6cm above the cervical vertebrae of the seventh cervical vertebrae in order to protect the thyroid gland and to minimize artificial shading.

As described above, the shielding range (W, H) of the rear shield may be set on the basis of the cervical vertebrae of the cervical vertebrae 7, but the physical condition (length or thickness of the neck, etc.) of the patient may be different The shielding range of the neck posterior region may be set by other criteria as follows.

Considering that the physical condition of each subject differs according to sex and age, the left limit of the rear shield 110 is 2 cm, more preferably 2 cm backward along the circumferential direction of the neck portion in the left vertical line L1 (see Fig. 5) It is good position to be more than 3cm.

The right limit of the rear shield 10 is a position that is 2 cm, more preferably, 3 cm or more rearward along the circumferential direction of the neck portion at the right vertical line L2 (see Fig. 5) The upper limit (the height of the upper end) of the portion 110 should be less than or equal to the fourth cervical vertebra.

For example, in the left and right shielding ranges with respect to the rear portion of the neck portion, the shielding ranges can be set with reference to the vertical lines L1 and L2 passing through the left and right outer earpieces respectively in the vertical direction. (The circumferential direction of the neck portion) becomes 2 cm, more preferably 3 cm, becomes the maximum left / right shielding limit to the rear portion of the neck portion, and the left and right shielding ranges of the neck posterior region within the region should be set .

In other words, it is preferable that the left and right shielding ranges of the cervical posterior region are determined within a range not exceeding 3 cm from the vertical line in the backward direction, in order to protect the thyroid gland and to minimize / prevent artificial shadowing.

Therefore, the shielding width W of the rear shield is shielded within 8 cm of each of the left and right sides of the cervical vertebrae of the seventh cervical vertebrae, and beyond the point of 3 cm rearward from the right and left vertical lines passing through the left and right external sheaths, It is more preferable that the left and right shielding ranges with respect to the rear portion of the neck portion are set so as not to be shielded.

The shielding height H of the rear shielding part 110 is set within a range of 6 cm above the cervical vertebrae of the cervical vertebrae 7 so as not to be shielded from the area above the cervical vertebrae 4 So that only the cervical vertebrae are shielded).

According to the present embodiment, the front shield 120 is integrally provided in the supporter 130, and has a width of 7 cm or less and a maximum height of 10 cm or less, especially 7 cm or less, and covers at least a region immediately before the thyroid The size and width of the thyroid gland, and the width and height of the thyroid gland are the minimum width and height of the frontal shield.

The supporter 130 may extend downward from the neck portion to a lower portion of the thorax to be permeable to radiation, and may be superimposed on the inner side of the thoracic protection unit 200, The left opening / closing part 151 and the right opening / closing part 152 are provided so as to match the shoulders of the examinee with each other.

More specifically, the supporter 130 may include a front base 131 stretched toward the front of the chest and a rear base 132 stretched toward the back plate. At this time, the front shielding part 120 is provided on the upper side of the front base 131, and the rear shielding part 110 is provided on the upper side of the rear base 132.

The opening and closing part 150 has an opening and closing device 150a such as a velcro or a zipper for opening and closing the opening and closing part 150 or a snap button (not shown). In this embodiment, a fixed end 150b is formed at the outer end of the opening / closing part 150 to stop the opening / closing part, and the opening / closing device for the opening / closing part is preferably made of a non-metallic material.

In this embodiment, the joint between the front base 131 and the rear base 132 constitutes the left opening / closing part 151 and the right opening / closing part 152, and the opening / closing part 150 is provided with the chest protection unit The thyroid protection unit 200 can be detachably attached to the thyroid protection unit 100. The thyroid protection unit 200 can be attached to or detached from the thyroid protection unit 100 by attaching a detachable attachment or detachment device such as a hook or hook,

4, the front chest shield 210 and the rear chest shield 220 described above may be attached to the front base 131 and the rear base 132, respectively, ) Or a detachable device of a snap button or hook or the like.

The front chest shield 210 and the rear chest shield 220 may be detachably attached to the front and rear surfaces of the front and rear bases 131 and 132, The position is not limited thereto.

Meanwhile, the section between the front shield 120 and the rear shield 110 is exposed to radiation, which does not mean that the soft tissue therebetween is visually exposed, but rather the area exposed to the radiation Which means that it is an incidence section). Accordingly, the front shielding part 120 and the rear shielding part 110 may be filled with a material easily permeable to radiation or may be visually exposed to the outside.

5 and 6 are views showing the use state of the radiation protection unit according to the present embodiment. When anatomical images of the head are required, such as dental panoramic radiography, 100 and the chest protection unit 200 are applied to the subject's body. At this time, the present embodiment minimizes the artificial shadow that adversely affects the panoramic image while effectively protecting the thyroid from the radiation during the panoramic imaging.

In addition, according to this embodiment, not only panoramic photography but also dental computed tomography imaging, and other maxillofacial and cervical area radiography are used extensively to provide accurate diagnostic images while effectively protecting patients from radiation hazards .

On the other hand, at the time of chest radiography, the chest protection unit 200 is separated from the thyroid protection unit 100 as shown in FIG. 6 so that radiation can be transmitted through the chest, So that it can be protected by the thyroid protective unit 100.

Hereinafter, the process of deriving the radiation shielding range of the thyroid shielding unit 100, particularly the rear shielding unit 110, according to the present embodiment will be described with reference to FIGS. 7A to 7E.

7 cm, 8 cm, and 9 cm upward from the spinous process of the cervical vertebrae 7, which can be easily palpated, for setting the shielding height H of the rear shielding portion 110, that is, The shade height of the rear shielding part 110, which can protect the thyroids, is optimized by minimizing the artificial shading appearing in the panoramic image by performing an experiment in which the panoramic radiography is performed.

In order to set the shielding width W of the rear shielding part 110, that is, left and right limits of the rear shielding part (left limit and right limit), the center of the external auditory meatus, L, Vertical Line) to the back of each 1cm, 2cm, 3cm, and 4cm (distance from the peripherals to 9cm, 8cm, 7cm, 6cm respectively).

(P, Dental Head Phantom Model 76-606DX, CIRS Co., USA) with respect to the range of the shielding height and shielding width of the thyroid protective unit 100 and the panoramic image with reference to the cervical vertebrae of the seventh cervical vertebra, , The upper limit (upper limit) and the lateral extension limit (left and right limit) of the cervical vertebrae of the 7th cervical vertebra were set based on the examination.

Hereinafter, the relationship between the upper and the lateral extension range of the thyroid protective unit 100 and the panoramic image will be firstly examined based on the state in which the radiation protection unit is worn on the human body as shown in FIG. 5, The relationship between the shape of the protector and the amount of radiation on the skin surface of the thyroid gland is examined.

One. Relationship between the upper and lateral extension of the thyroid gland and the panoramic image

[Experimental Example 1]

7A, the height of the rear shield 110 is 9 cm from the cervical vertebrae of the seventh cervical vertebra, and the left end of the rear shield 110 is 1 cm in front of the vertical line L1 of the left outer ear The right end of the rear shield 110 is positioned at a position 1 cm rearward from the vertical line L2 of the right outer ear hole (i.e., 9 cm from the distal end of the seventh cervical vertebra) As a result of photographing the panoramic image, the degree of occurrence of artificial shadow appeared as shown in FIG. 7A.

As a result, a true image due to shielding of the thyroid protective unit 100 was observed on the left side of the panoramic image, and the virtual image due to the virtual image was observed on the right side of the image, and it was confirmed that the diagnostic image had an adverse effect.

[Experimental Example 2]

7B, the height of the rear shield 110 is 8 cm from the cervical vertebrae of the seventh cervical vertebra, and the positions of the left and right ends of the rear shield 110 are the left vertical line L1 and the right vertical line L1, (I.e., 8 cm from the cervical vertebra of the seventh cervical vertebra) to the backward direction (L2), respectively. As a result, the degree of shading of the panoramic image was as shown in FIG.

[Experimental Example 3]

7C, the height of the rear shield 110 is 7 cm above the cervical vertebrae of the seventh cervical vertebra, and the positions of the left and right ends of the rear shield 110 are located at the left vertical line L1, A panoramic image was taken from the right vertical line (L2) to the back 3 cm (7 cm from the cervical vertebra of the seventh cervical vertebra), and the degree of shading of the panoramic image was as shown in FIG.

[Experimental Example 4]

7D, the height of the rear shield 110 is 6 cm above the cervical vertebrae of the seventh cervical vertebra, and the positions of the left and right ends of the rear shield 110 are the left vertical line L1, A panoramic image was taken from the right vertical line (L2) to the backward 2 cm (that is, 8 cm from the cervical vertebra of the seventh cervical vertebra), and the degree of shading of the panoramic image was as shown in FIG.

[Experimental Example 5]

7E, the height of the rear shield 110 is 6 cm above the cervical vertebra of the seventh cervical vertebra, and the positions of the left and right ends of the rear shield 110 are determined by the left vertical line L1, The panoramic images were taken from the right vertical line (L2) to the backward 3 cm (ie, 7 cm from the 7th cervical vertebra), and the degree of shading of the panoramic image was as shown in FIG.

Based on the above experimental results, artificial shading according to the radiation shielding range of the thyroid shielding unit 100, particularly the rear shielding part 110, is as follows.

When the height of the posterior shield 100 was 6 cm with respect to the cervical spine of the 7th cervical vertebra, artificial shadow was formed in the lower incisor of the mandible distal to the apex of the mandibular incisor but no artificial shadow was observed in images of the mandibular anterior teeth and alveolar bone And artificial shadow was formed in the mandibular anterior tooth and apical region in the case of 7 cm.

The left end or the right end of the rear shield 110 is positioned rearward by 1 cm (7th position) on the basis of the left vertical line L1 and the right vertical line L2 passing vertically in the vertical direction of the left outer ear hole or the right outer ear, The left end or the right end of the rear shielding part 110 is located on the left side of the left vertical line and the right side of the right side of the back shielding part 110. In this case, (8 cm, 7 cm from the cervical vertebrae of the 7th cervical vertebra), the artificial shadows were hardly observed.

2. Radiation dose of skin surface of thyroid gland according to thyroid protector type

A preliminary study was conducted to investigate the amount of radiation on the surface of the thyroid gland according to the shape of the thyroid protective unit (rear shield). As shown in [Table 1], when the thyroid gland protector was not worn, the surface dose of the thyroid was 87.4mR, and it was protected to 6cm above the 7th cervical vertebra, and the left external ear and right external ear In case of protection to the position 3cm backward, the exposure dose of the thyroid surface was 80.7mR, and when it was protected up to 7cm position and protected 2cm backward from the external ear, the surface dose of thyroid was 73.9mR Respectively.

The reduction effect of the thyroid surface exposure dose according to the shape of the rear shield is as shown in [Table 2] below, and it protects up to 6 cm from the cervical vertebrae of the 7th cervical vertebrae, 7.7% in case of protection, and 16.1% in case of protecting up to 7cm in the vertical direction and protecting 2cm backward from the outer ear.

Height extended from cervical vertebra No. 7 (shielding height) 6cm 7cm 3cm behind the outer ear 7.7% 15.4% 2 cm behind the ear 12.6% 16.1%

The abatement effect can be represented by the abatement effect = (AB) / A * 100 where A is the exposure amount when the thyroid gland is not worn and B is the exposure amount according to the shape of the thyroid gland.

Based on the above experimental results, the radiation shielding range of the rear shielding part 110 at the time of panoramic photographing is 6 cm at the upper side and 8 cm at the side (left and right side) It is found that artificial shadowing which has a bad effect on the panoramic image is minimized and the radiation protection effect on the thyroid is optimal.

In addition, in the anterior part of the human body, a front shielding part 110 serving as a shielding film is positioned to the thyroid cartilage (under the thyroid cartilage), which is the outer side of the skin where the thyroid is present, And direct radiation to protect the thyroid gland.

In consideration of various body shapes, the rear shielding part 110 is shielded within 8 cm of each of the left and right sides of the cervical vertebrae of the seventh cervical vertebrae, And the left and right shielding ranges with respect to the posterior portion of the neck portion are set so that the distance to the vertical line of the right outer ear is 2 cm or more, preferably 3 cm or more. In addition, the rear shield 110 is shielded within 6 cm of the upper part of the cervical vertebrae of the seventh cervical vertebrae, and the upper shielding range is set to the rear part of the neck part so that the upper limit is less than the fourth cervical vertebra.

In this embodiment, the front shield 120 and the rear shield 110 are fixed to the protector base 130, that is, the supporter. However, since the front shield 120 and the rear shield 110 are fixed to the protector base 130, The rear shield 110 may be detachably attached to the protector base 130. In this case, the rear shield 110 having a size suitable for the body condition of the examinee is selected, (Not shown).

For example, in order to attach / detach the rear shielding part 110, an assembling groove for installing the rear shielding part 110 is formed on the protector base 130, and the rear shielding part 110 And then mounted on the protector base 130 can be applied.

[Example 2]

9 is a perspective view schematically showing a front shielding part and a rear shielding part of the radiation protection equipment according to the second embodiment of the present invention, and FIG. 9 is a perspective view schematically showing the front shielding part and the rear shielding part of the radiation protection equipment according to the second embodiment of the present invention. 10 is a side view showing a state in which the radiation protection equipment according to the second embodiment of the present invention is worn on the human body.

8 to 10, the radiation protection apparatus according to the present embodiment includes a thyroid protection unit 100A for protecting the thyroid gland and a thoracic protection unit 200 for protecting the thorax, 100A includes a rear shielding portion 110, a front shielding portion 120, and a protector base 130A.

The basic functions of the rear shield 110 and the front shield 120 and the protector base 130A are the same as those described in the previous embodiment and the rear shield 110 and the front shield 120, The technical idea described in the above embodiment can be applied to the thoracic protection unit 200 as well.

A neck hole 101a is formed in the thyroid protection unit 100A to allow the neck to be inserted when the thyroid protection unit 100A is worn on the human body. However, in this embodiment, when the neck hole 101a is inserted into the neck hole 101a in order to wear the thyroid protective unit 100A on the human body, the supporter 130A is elastically stretched so that the neck hole 101a is elastically expanded Elasticity.

The neck hole 101a can be extended to wear the thyroid shielding unit 100A and the neck hole 101a can be expanded by the elastic restoring force of the supporter 130A, The front shield 120 and the front shield 120 may be as close as possible to the rear and front portions of the neck, respectively.

In a radiographic apparatus using a cone beam, when a gap is formed between the front shield 120 and / or the rear shield 110 and the soft tissue (skin of the neck), the distance from the radiation source (x-ray generator) Can be influenced on the relative radiation shielding height and thus affect the artificial shadow. Therefore, if the neck hole 101a is resiliently extended, such a problem can be minimized.

The supporter 130A has an elastically stretchable elastic band 133 for elastic expansion of the neck hole 101a and the elastic band 133 is disposed between the left end of the rear shield 110 and the front end of the elastic band 133. [ An annular band type or an annular collar may be used to connect the left end of the shield 120 and the right end of the rear shield 110 and the right end of the front shield 120, have. In this case, the front shielding part 120 is provided in front of the elastic band 133 and the rear shielding part 110 is provided in the rear area of the elastic band 133.

Of course, the elastic band 133 of the supporter includes a left elastic band connecting the left end of the rear shield 110 and the left end of the front shield 120, and a left elastic band connecting the right end of the rear shield 110, And a right elastic band which connects the right end of the shield 120 and is divided from the left elastic band. Other configurations other than those described above can be equally applied to those described in the above embodiments, so repetitive explanations are omitted.

It is needless to say that the structure for elastic extension of the neck hole 101a is not limited to that described above. It is needless to say that the neck hole 101a is configured to be narrower than the neck portion in the state in which no external force is applied.

Hereinafter, other embodiments of the radiation protection apparatus according to the present invention will be described with reference to FIGS. 11 to 14, and more specifically, examples of the radiation protection apparatus having a rear shielding structure capable of adjusting the radiation shielding range will be described do.

[Example 3]

FIG. 11 is an exploded view of a thyroid protection unit of a radiation protection device according to a third embodiment of the present invention, FIG. 12 is a schematic rear view of the thyroid protection unit of FIG. 11, and FIG. Sectional views.

11 to 13, the radiation protection apparatus of the present embodiment includes a thyroid protection unit 100B and a thoracic protection unit 200, and the thyroid protection unit 100B includes a rear shielding unit 110A, And includes a front shield 120 and a protector base 130.

The basic functions of the rear shielding part 110A, the front shielding part 120 and the protector base 130 are the same as those described in the above embodiment, and the front shield 120, the protector base 130, The protective idea described in the above embodiments (the first embodiment and the second embodiment) can be applied to the protection unit 200 as well.

In the present embodiment, the rear shield 100A is a structure capable of adjusting the radiation shielding range, and in particular, is a structure that can move in the vertical direction so that the radiation shielding height can be adjusted.

More specifically, as the rear shield 100A is moved along the vertical direction of the neck portion, the shielding range with respect to the upper cervical vertebrae of the seventh cervical vertebrae is adjusted according to the subject's physical condition or other circumstances There is a difference in being made possible.

That is, the thyroid-protection unit 100B in the present embodiment has a shield height regulating device for the cervical posterior region. The shielding height adjusting device includes a longitudinal slot 111 formed in the rear shielding part 110A, in particular, a central part of the rear shielding part, and a rear long shielding part 111 which is fixed to the rear shielding part in a state in which the height of the rear shielding part is adjusted And a stopper 112.

The stopper 112 is installed in the longitudinal slot 111 and presses the peripheral portion of the longitudinal slot 111 as the stopper 112 is fastened to the fastening hole 134 formed in the protector base 130, So that the height of the rear shield 100A is maintained.

The stopper 112 is a bolt type and is exposed to the rear of the rear shield 110A so that the head 112a for pressing the periphery of the longitudinal slot 111 as the stopper 112 is tightened And a screw body 112b fastened to the fastening hole 134 of the protector base through the longitudinal slot 111 and having a male thread on the outer circumferential surface, but the type and structure of the stopper are not limited thereto .

The protector base 130 may further include a guide protrusion 135 for guiding the linear motion of the rear shield 130.

Therefore, the rear shielding portion 110A of the thyroid protection unit 100B disclosed in this embodiment can adjust the radiation shielding range, more specifically, the radiation shielding height according to the physical condition of the examinee or the requirements of the radiological image, Artificial shading can be minimized or prevented. Other configurations other than those described above can be equally applied to those described in the above embodiments, so that repetitive description will be omitted.

[Example 4]

FIG. 14 is a rear view of a rear shielding part of a radiation protection equipment according to a fourth embodiment of the present invention, in which the radiation protection equipment of the present embodiment comprises a thyroid protection unit 100C and a thoracic protection unit (not shown) , The thyroid protection unit includes a rear shielding part 110B, a front shielding part (not shown), and a protector base 130.

The basic functions of the rear shield 110B, the front shield and the protector base 130 are the same as those described in the above embodiments, and the front shield, the protector base 130 and the thoracic protection unit 200 The technical ideas described in the first to third embodiments described above can be equally applied.

In the present embodiment, the rear shielding part 100B has a structure capable of adjusting the radiation shielding range, in particular, a structure capable of adjusting the radiation shielding width. More specifically, the left and right shielding widths of the rear shielding portion 100B can be adjusted.

Referring to FIG. 14, the thyroid protection unit in the present embodiment has a lateral widthwise shielding range adjusting means, that is, a shielding width adjusting apparatus, for the rear portion of the neck portion. In this embodiment, the rear shielding portion 110B The sliding width of the sliding door is controlled by the method of opening the door.

More specifically, the rear shielding part 110B includes a left shielding plate 113 and a right shielding plate 114, which are movable in the lateral direction, for controlling the radiation shielding width of the rear shielding part 110B The left shielding plate 113 and the right shielding plate 114 are formed with lateral long holes 113a and 114a in the left and right direction, respectively.

The left shielding plate 113 and the right shielding plate 114 are fixed and fixed by stoppers 115 and 116. The stoppers 115 and 116 are fixed to the stopper 112 described in the above- Can be applied equally.

Therefore, the stopper 112 is fastened to the fastening holes of the protector base 130 through the transverse slots 113a of the left shielding plate and the transverse slots 114a of the right shielding plate.

 According to the present embodiment, the left shielding plate 113 and the right shielding plate 114 are moved in the lateral direction to set the position so that the rear shielding portion 110B has a radiation shielding width suited to the body condition of the examinee The head of the stopper presses the left shielding plate 113 and the right shielding plate 114 so that the left shielding plate 113 and the left shielding plate 113 are pressed against each other by the same principle as in the above- And the movement of the right shielding plate 114 is restrained.

Accordingly, the rear shielding portion 110B of the thyroid protective unit disclosed in this embodiment can adjust the radiation shielding range, more specifically, the radiation shielding width according to the physical condition of the examinee or the requirements of the radiological image, .

Other configurations other than those described above can be equally applied to those described in the above embodiments, so that repetitive description will be omitted.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

The present invention can provide a safe and accurate diagnosis image from the radiation damage caused in the tofu and chest radiography performed without proper radiation defense against the thyroid so far, The availability in the area is very high.

That is, the present invention can be applied not only to the whole dental radiography such as intraoral radiation, extra-lateral radiation, tofu standard radiography, and computed tomography, but also to the whole of the chest radiography It is an effective application thyroid protector, it can be commercialized directly by dental and chest radiological equipment manufacturing company, radiation protection clothing manufacturing company and the like, and it can be continuously produced.

P: Phantom 100: Thyroid protective unit
110: rear shielding part 120: front shielding part
130: Protector base (supporter) 200: Thoracic protection unit
210: Rear thoracic shield 220: Anterior chest shield

Claims (12)

A front shield for shielding the front portion of the neck from the radiation to protect the thyroid gland in front of the thyroid gland and a front shield for shielding the front portion of the neck from the radiation, A thyroid protective unit including a shield and a supporter which is worn on the human body and supports the rear shield and the front shield; And
A chest protection unit shielding the chest from the radiation and detachable from the thyroid protective unit for chest radiography, the radiation protection equipment comprising:
The rear shield is provided to face the front shield and blocks the radiation in the left vertical line passing through the left outer ear and the right outer ear respectively in the vertical direction and the rear area of the right vertical line; Wherein the thyroid protection unit exposes the left and right sides of the neck to radiation. The method according to claim 1,
Wherein the chest protection unit is detachably provided to the thyroid protection unit. 3. The method of claim 2,
Wherein the chest protection unit is detachably coupled to the supporter. The method according to claim 1,
Wherein a neck hole is formed in the thyroid protection unit so that the neck is inserted into the thyroid protection unit. 5. The method of claim 4,
The supporter comprising: And an opening / closing part which is provided at an edge of the neck hole so as to be openable and closable, and which opens and separates to expand the neck hole. 6. The method of claim 5,
Wherein the opening / closing portion comprises: A left opening / closing part provided on a left side of the neck hole so as to be positioned on a left shoulder, and a right opening / closing part provided on a right side of the neck hole to be positioned on a right shoulder. 6. The method of claim 5,
Wherein one side of the opening and closing part is connected to an edge of the neck hole and the other side of the opening and closing part is closed to limit the opening length of the opening and closing part. 5. The method of claim 4,
Wherein the supporter has elasticity such that the neck hole is elastically expanded when the neck portion is inserted into the neck hole for wearing the thyroid protective unit on the human body. The method according to claim 1,
Wherein the rear shield is adjustable in a radiation shielding range. 10. The method according to any one of claims 1 to 9,
The left limit of the rear shield is a position at least 3 cm rearward along the circumferential direction of the neck at the left vertical line; The right limit of the rear shield is a position at least 3 cm rearward along the circumferential direction of the neck at the right vertical line; Wherein the upper limit of the rear shield is less than or equal to four cervical spine. 10. The method according to any one of claims 1 to 9,
Wherein the rear shield is provided on the supporter so as to block a range within 6 cm from the upper side of the cervical vertebrae of the seventh cervical vertebrae and a range within 8 cm from the left and right sides respectively. A front shield for shielding the front portion of the neck from the radiation to protect the thyroid gland in front of the thyroid gland and a front shield for shielding the front portion of the neck from the radiation, A thyroid protective unit including a shield and a supporter which is worn on the human body and supports the rear shield and the front shield; And
A chest protection unit shielding the chest from the radiation and detachable from the thyroid protective unit for chest radiography, the radiation protection equipment comprising:
Wherein the rear shield is adjustable in a radiation shielding range.

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