JP2006275610A - Radiation shielding panel device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-supported radiation shielding panel device that is used for suppressing doses with a human body exposed thereto in facilities, such as medical institutions that handle low-level radiations, isolating individual examinees from other examinees in a shielded state from radiation, in particular, in a waiting room for PET examination, and reducing radiation exposure of medical care personnel. <P>SOLUTION: A panel provided with a radiation shielding plate 6, such as a lead plate of a prescribed plate thickness sufficient for shielding from gamma rays, is provided on supports stood on both sides and between the supports so as to isolate the interior from the exterior. A plurality of such panels are connected into a panel structure capable of self-supporting, having a structure that is laterally connectable rectilinearly or curvilinearly by means of the supports, and being provided with an opening, at least in a part thereof, the opening being of an L-shape, T-shape, or U-shape, etc. in top plan view. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radiation shielding panel device, and more particularly to a radiation shielding panel device for suppressing exposure to a human body in a facility such as a medical institution that handles low-level radiation.

  In recent years, PET is often used together with X-ray CT and MRI for cancer testing. PET stands for positron emission tomography (positron emission tomography), and X-ray CT and MRI capture the “size and shape” of cancer and the like. A new test that captures the "increased metabolic state" can detect small cancer lesions of a few millimeters, and is expected to become increasingly popular in the future.

  The PET test is based on the fact that cancer cells consume about 3 to 8 times more glucose than normal cells. A test drug similar to glucose (FDG) is injected into the body and released from the FDG. It detects gamma rays that are emitted when positrons combine with surrounding electrons and annihilate them, visualizes the intensity distribution, and detects small cancers that were difficult to detect by conventional examinations. Specifically, after FDG is injected into the examinee, it takes about 50 minutes to 1 hour until the FDG reaches the whole body. Although the PET inspection itself is completed in about 20 to 30 minutes, it is necessary to wait until the positrons emitted from the FDG are sufficiently reduced.

  The radiation dose by PET examination is about 2-4 mSv (millisievert) per time, which is similar to the annual radiation dose (about 2.4 mSv), but gamma rays are highly transmissive radiation. So if you do not take any radiation shielding measures, you will be exposed to others nearby by gamma rays emitted through your body. Therefore, the waiting room is conventionally a private room surrounded by a radiation shielding wall, but this is very uneconomical and inefficient. In particular, the PET test is characterized by the use of positron emitting nuclides with a short half-life, so it is desirable from the economic point of view to examine a large number of patients one after another. The current number of people is limited.

  On the other hand, conventional waiting facilities for radiological medical diagnosis are lightweight fixed partitions or concrete structures, and the construction is large-scale, and on-site construction requires special skills. It was the cause. Conventionally, a radiation shielding partition has been a large-scale construction in which a radiation shielding plate such as a lead plate is pasted on the base assembly side of a partition that has been finished on one side, and a new base assembly is performed to finish the other. In addition, the examinee is not particularly a nurse call or a patient entrance guidance device for the examinee, and an exposure type guidance or display device is installed in the booth.

In addition, in the partition wall which closes between the floor surface and the ceiling in Patent Documents 1 and 2, the present applicant supports the conductive wall panel with the same conductive top rail, ground rail and support, and between each member. We have proposed an electromagnetic shielding wall in which the gap is closed with a conductive gasket or tape. However, the electromagnetic wave shielding wall merely constitutes a conductive surface that is not electrically connected, and has almost no shielding effect against highly transmissive gamma rays.
JP 2001-36281 A JP 2002-70202 A

  Therefore, in view of the above-described situation, the present invention intends to solve the problem in a facility such as a medical institution that handles low-level radiation. It is a point to provide a self-supporting radiation shielding panel device capable of isolating individual examinees from other examinees in a radiation shielding state in the waiting room.

  In order to solve the above-mentioned problems, the present invention has a radiation shielding plate having a predetermined thickness sufficient for shielding gamma rays such as a lead plate between the support columns erected on both sides and the support columns so as to block the inside and outside. A panel plate is provided, and is configured to be connected in a straight line shape and a bent shape to the side via a support column. A radiation shielding panel device was configured as a self-supporting panel structure provided with an opening in a part (claim 1).

  More specifically, the inner panel plate and the outer panel plate are detachably attached to the both sides of the front and back sides of the support column erected on both sides, and the space between the both side support columns and the inner panel plate and the outer panel plate is attached. It is preferable that the radiation shielding plate is provided inside (Claim 2).

  Here, the radiation shielding plate having a predetermined thickness is attached to the support column using a holding bracket regardless of the inner panel plate and the outer panel plate.

  In addition, using a plurality of radiation shielding plates that are equal to or greater than the predetermined plate thickness in total, at least one radiation shielding plate is directly bonded to the back surface of the inner panel plate or the outer panel plate and integrated, A radiation shielding plate is attached to the column using a holding bracket in the space between the inner panel plate and the outer panel plate, or directly bonded to the back surface of the other inner panel plate or outer panel plate, or integrated. The other radiation shielding plate is attached to the support column using a holding bracket in the space between the inner panel plate and the outer panel plate, and further directly bonded to the back surface of the other inner panel plate or outer panel plate. It is also preferable to make it (claim 4).

  And the said support | pillar is a housing with a hollow inside, has an opening part in one surface which faces in the space between the said inner panel board and an outer panel board, and the said radiation shielding board from this opening part More preferably, it is attached so as to block the internal space of the column.

  Further, an information transmission means is provided in a space between the inner panel plate and the outer panel plate, and one of the inner panel plate and the outer panel plate is a glass panel plate so that the display section of the information transmission device can be seen through the glass panel plate. It is also preferable to set to (Claim 6).

  The radiation shielding panel device according to the first aspect of the present invention as described above has a support plate erected on both sides and a radiation shield plate having a predetermined thickness sufficient for shielding gamma rays such as a lead plate between the support columns. A panel plate is provided so as to block the inside and outside, and it can be connected in a straight line and a bent shape to the side via a support column. By making it a self-supporting panel structure with openings in at least a part of the character shape, etc., it is possible to easily provide multiple booths with radiation shielding functions in the interior of an empty room. Therefore, gamma rays can be blocked and special work of attaching a lead plate to the wall surface as in a conventional radiation shielding room is unnecessary, so that construction and assembly are easy. In particular, unlike X-ray CT and MRI, PET examination is an unprecedented new examination method that emits gamma rays from the body of the patient, so individual patients are isolated from other patients in a radiation-shielded state. Although it is necessary to do so, it can be realized in a booth in which a relatively wide waiting room is partitioned by a simple radiation shielding panel device. In other words, gamma rays are very straight and transparent, so if a geometrical arrangement in which there is a radiation shield between each patient can be realized, the gamma rays are absorbed by the radiation shield and other This prevents exposure of medical examinees and medical staff.

  According to claim 2, the inner panel plate and the outer panel plate are detachably attached to the both sides of the front and back sides of the support column erected on both sides, and between the both side support columns and the inner panel plate and the outer panel plate. Since the radiation shielding plate is provided in the space, the construction is easy and the appearance is excellent.

  According to claim 3, after attaching one of the inner panel plate and the outer panel plate to both columns, the radiation shielding plate is mounted to the column using the holding metal fitting, and the other remaining panel plate is attached to both columns. Since it is only attached, construction and assembly are very simple, and it is easy to work before attaching the panel plate by attaching it to the column regardless of the panel plate, and the mounting strength is also increased.

  According to the fourth aspect, since the radiation shielding plate is divided into a plurality of radiation shielding plates that are equal to or greater than the predetermined plate thickness in total, even when a lead plate having a large specific gravity is used as the radiation shielding plate, the weight of the constituent members is more than necessary. Since it does not become heavy, construction work becomes easy, and since the radiation shielding plate is directly pasted and integrated in advance on the back surface of the panel plate, the radiation shielding plate attaching operation and the panel mounting operation are simplified.

  According to the fifth aspect, since the radiation shielding plate can be provided also inside the support column, the radiation (gamma ray) shielding effect can be enhanced.

  According to claim 6, the information displayed on the display part of the information transmission means makes it possible for the examiner who emits radiation to go out of the booth and the medical worker does not enter or leave the waiting room or waiting room. In addition, it is possible to reliably transmit the order of treatment, the route, etc., and the information transmission means is built in the space between the inner panel plate and the outer panel plate, so there is no obstacle.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows a construction example using the radiation shielding panel device of the present invention, FIGS. 2 to 6 show a first embodiment of the radiation shielding panel device of the present invention, and A in the drawing is a unit constituting a low partition. Partition panel, B is a panel structure composed of a plurality of unit partition panels A, 1 is a column, 2 is a baseboard, 3 is an upper connecting rod, 4 is an inner panel plate, 5 is an outer panel plate, and 6 is a radiation shield A board, 7 is a cap, and 8 is a side cover. In the present embodiment, gamma ray shielding will be described in order to be applied to a waiting room for PET inspection, but it can be similarly applied to X-rays having lower transmission capability than gamma rays.

  First, the outline of the present invention will be described with reference to FIG. A plurality of unit partition panels A having a radiation shielding function are connected in a straight line shape and a bent shape to the side via a support column to constitute a self-supporting panel structure B having a U-shape in plan view. A plurality of booths are formed by aligning a plurality of the panel structures B. For example, a space D serving as a passage is placed on the side facing the opening C of one panel structure B. The straight portion of the panel structure B is positioned, and the two panel structures B are combined to form one booth. In addition, it is also possible to form a booth of another form by aligning a plurality of panel structures B that are L-shaped or T-shaped in plan view.

  The radiation shielding panel device of the present invention will be specifically described below with reference to FIGS. In the radiation shielding panel device of the first embodiment, a plurality of columns 1,... Are erected via an adjuster 9 on a baseboard 2 provided in a L-shape, T-shape or U-shape in plan view on the floor surface. In addition, the upper connecting rod 3 is connected between the upper ends of the adjacent columns 1 and 1 to form a frame, and the inner panel plate 4 and the outer panel plate are spaced from each other on both sides of the columns 1 and 1 erected on both sides. 5 is detachably attached, and a radiation shielding plate having a predetermined thickness sufficient for shielding gamma rays, such as a lead plate, in the both side posts 1, 1 and the space 10 between the inner panel plate 4 and the outer panel plate 5. 6 is provided to block the inside and outside. Here, the support columns 1, 1, the upper connecting rods 3, the inner and outer panel plates 4, 5, the baseboard 2, and the headboard 7 constitute a unit partition panel A composed of a low partition. A plurality of the unit partition panels A are continuously provided in a straight line shape and a bent shape to the side via the support column 1 and opened in at least a part of a L shape, a T shape, or a U shape in a plan view. This is a self-supporting panel structure provided with. The figure shows a panel structure connected in an L shape in plan view.

  In a medical institution such as a hospital, in order to configure a stand-by room for performing a PET examination as an independent booth for each examinee, at least a part of the aforementioned L-shape, T-shape, or U-shape in plan view A panel structure with self-supporting openings is regularly arranged and arranged so that the linear part of the other booth faces the opening of one booth. The radiation shielding plate 6 always exists. Therefore, the gamma rays emitted from the waiting patient in the booth are applied to the radiation shielding plate 6 of the unit partition panel A constituting the booth or the radiation shielding plate 6 of the unit partition panel A constituting another adjacent booth. Since energy is absorbed and attenuated during transmission, it is possible to prevent exposure of other examinees. In addition, it is preferable that each structural member of the said unit partition panel A is fundamentally formed with a steel plate. That is, the gamma rays are attenuated somewhat by the steel plate, so that the gamma ray performs a shielding function together with the radiation shielding plate 6 made of a lead plate having a predetermined thickness.

  More specifically, as shown in FIGS. 3, 5, and 6, the support column 1 is a steel casing that has a hollow interior, and is within a space 10 between the inner panel plate 4 and the outer panel plate 5. It has the opening part 11 in a part of one surface which faces. An adjuster receiver 9A of an adjuster 9 is attached to the lower end of the support column 1, and an adjuster bolt 9B screwed to the lower end of the adjuster receiver 9A is fixed to the floor surface with a substantially U-shaped cross section with the groove 12 facing upward. The adjuster receiver 9 </ b> A is placed in the concave groove 12 of the baseboard 2 while being placed on the bottom surface of the baseboard 2. Further, as shown in FIGS. 5 and 6, the front and rear surfaces of the support column 1 are fixed pieces 13 and 13 extending downward, and the fixed pieces 13 and 13 are positioned on the outer surface of the baseboard 2. Then, with the support column 1 set at a predetermined position, the fixing pieces 13 and 13 are fixed to the baseboard 2 with screws.

  And as shown in FIG. 4, the said upper connection rod 3 is connected between the upper end parts of the adjacent both-side support | pillars 1 and 1, and a frame structure with high intensity | strength is formed. Specifically, the connection fitting 14 is screwed to the upper end portion on the connection side of the support column 1, and the end of the upper connection rod 3 is mounted on the connection fitting 14 to be screwed together. In this embodiment, the upper connecting rod 3 is the same as the support column 1 in this embodiment, and is screwed and connected in a state where the opening is covered with another U-shaped rectangular cross-section housing, which is equivalent to an integrally formed square pipe. The body is The headboard 7 is fitted to the upper connecting rod 3 with a pair of fitting pieces 15, 15 sandwiched from the front and rear.

  The inner panel plate 4 and the outer panel plate 5 have a structure that can be detachably attached to the support column 1 directly or via the holding bracket 17 with the locking members 16. A conventionally well-known structure can be adopted for the panel plate mounting structure. In the present embodiment, the inner panel plate 4 is a steel panel plate having a normal structure in which a gypsum board core 18 is bonded to the back surface, and the outer panel plate 5 is a glass having a holding frame 20 attached around a glass plate 19. Panel board. The inner panel plate 4 uses locking holes (not shown) formed on the front and rear surfaces of the support column 1 at regular intervals, and locks the locking tool 16 in the locking holes. The stopper 16 is fixedly attached to locking holes (not shown) formed in the folded pieces 21 and 21 on both side edges of the inner panel plate 4. The outer panel plate 5 is attached and detached in the same manner as described above by using the locking tool 16 on one holding piece 17A of a U-shaped holding bracket 17 screwed to the support column 1 with the holding frames 20 and 20 on both sides. Installed as possible. The holding bracket 17 attached to the opening 11 side of the support column 1 has both holding pieces 17A and 17B wide, and the main body portion is inserted from the opening portion 11 and screwed to the opposing surface. The holding frame 20 of the glass panel plate is attached to the holding piece 17A protruding to the side. On the other hand, a holding bracket 17 having a narrow width between both holding pieces 17A and 17B is screwed to the opposite side surface of the support column 1, and the holding frame 20 of the glass panel plate is attached to the holding piece 17A in the same manner as described above.

  As shown in FIGS. 3 and 4, the radiation shielding plate 6 having a predetermined thickness is attached to the support posts 1, 1 regardless of the inner panel plate 4 and the outer panel plate 5. Use to install. The radiation shielding plate 6 is a lead plate having a thickness of 3 mm, for example, and is deformed when directly attached between the both supports 1 and 1. Therefore, a composite board 6A having a flexible board 22 having a thickness of 5 mm attached to the back surface is obtained. Screws are attached to the holding pieces 17B and 17B of the holding brackets 17 and 17 attached to the both columns 1 and 1, respectively. Further, the holding pieces 17B, 17B of the holding fittings 17, 17 are joined together with a radiation shielding plate 6 made of a lead plate having a thickness of 3 mm on one surface and simultaneously screwed when the composite board 6A is screwed. It has stopped. The radiation shielding plate 6 enters the internal space from the opening 11 of the support column 1 and shields a portion that cannot be covered by the composite board 6A from gamma rays. Further, the lower end of the composite board 6A extends to the bottom surface in the groove 12 of the baseboard 2 as shown in FIG. Here, the composite board 6 </ b> A serves to eliminate problems caused by the outer panel plate 5 being a glass panel plate, i.e., a decorative plate that hides the back surface of the inner panel plate 4. Further, if lead glass is used as the glass plate 19, it is translucent, but the shielding effect against gamma rays can be enhanced while ensuring translucency.

  Moreover, as shown in FIG. 3, in the corner part which connects unit partition panels A and A at right angles, the support | pillar 1 of the edge part of the unit partition panel A connected linearly uses a thing with a narrow lateral width, and connects. Using the joint portion formed between the inner panel plate 4 and the side cover 8 of the other unit partition panel A, the column 1 having the narrow width is screwed to the side surface of the corresponding column 1 and connected.

  Next, FIGS. 7 to 9 show a second embodiment of the present invention. In this embodiment, the inner panel plate 4 and the outer panel plate 5 have a normal structure in which a core material 18 of gypsum board is attached to the back surface. Steel panel board. In the same manner as described above, a radiation shielding plate 6 having a predetermined thickness sufficient for shielding gamma rays such as a lead plate is provided in the space 10 between the both side supports 1 and 1 and the inner panel plate 4 and the outer panel plate 5. . In this case, since the inner panel plate 4 and the outer panel plate 5 are attached to the front and rear surfaces of the support columns 1 and 1 directly using the fasteners 16..., The holding bracket 17 has a function of attaching the radiation shielding plate 6. Since only one holding piece 17A is omitted, the holding piece 17A is L-shaped in plan view. Since other configurations are the same as those described above, the same components are denoted by the same reference numerals and description thereof is omitted.

  Next, FIGS. 10 to 12 show a third embodiment of the present invention. In this embodiment, both the inner panel plate 4 and the outer panel plate 5 have a normal structure in which a core material 18 of gypsum board is attached to the back surface. Each of the gypsum boards 18 has a structure in which the radiation shielding plate 6 made of a lead plate having a thickness of 1.5 mm is directly bonded to the back surface and integrated, and the inner panel plate 4 and the outer panel plate. At the same time, the radiation shielding plate 6 having a total thickness of 3 mm is provided in the space 10 between the inner panel plate 4 and the outer panel plate 5. As in the second embodiment, L-shaped holding brackets 17 and 17 are attached to the support column 1, and the radiation shielding plate 6 made of a lead plate having a thickness of 3 mm is provided on the holding piece 17B. It is installed on one side. In this case, as described above, since the heavy composite board 6A is not used, the work at the time of construction becomes easier, and the number of steps is reduced, so that the work efficiency is improved.

  In this embodiment, since the composite board 6A as described above is not used, it is necessary to provide a radiation shielding function also in the concave groove 12 of the baseboard 2. For this purpose, an insertion member 23 having a U-shaped cross section narrower than the lateral width of the groove 12 is inserted into the groove 12 of the baseboard 2, and the gap between the baseboard 2 and the insertion member 23 is thick. A radiation shielding plate 6 made of a 1.5 mm-lead plate is sandwiched and held. A radiation shielding plate 6 made of a lead plate having a thickness of 1.5 mm is directly attached to the lower end of the inner panel 4 and the outer panel 5 at the lower end where the core member 18 does not exist. I wear it.

  Further, when the radiation shielding function is divided using a plurality of thin radiation shielding plates 6,. For example, in the third embodiment, the thin radiation shielding plate 6 is adhered to both the inner panel plate 4 and the outer panel plate 5, but the radiation shielding plate 6 is adhered to only one of the panel plates. As in the second embodiment, holding brackets 17 and 17 are used in the space 10 between the inner and outer panel plates 4 and 5 using a composite board 6A in which a radiation shielding plate 6 made of a thin lead plate is bonded to the flexi board 22. It is also possible to install. In this case, the outer panel plate 5 to which the radiation shielding plate 6 is not attached can be a glass panel plate as in the first embodiment, and the composite board 6A is a decorative plate that hides the back surface of the inner panel plate 4. It also works. Further, a thin radiation shielding plate 6 attached to the back surface of the inner and outer panel plates 4 and 5 is used, and a second implementation is performed in the space 10 between the inner and outer panel plates 4 and 5 according to the radiation dose to be shielded. It is also possible to attach the composite board 6A with the holding metal members 17 and 17 in the same manner as the form. In any case, the total thickness of the radiation shielding plate 6 is set to be equal to or greater than a predetermined thickness required for shielding gamma rays in the path of gamma rays passing through the inner panel plate 4 and the outer panel plate 5. .

  Finally, in the first embodiment described above, the outer panel plate 5 is a glass panel plate. When a booth is configured by arranging a plurality of panel structures, another booth is provided at the opening of the panel structure. The outer surface of the panel structure constituting the glass panel, that is, the glass panel plate as the outer panel plate 5 faces. Accordingly, information transmission means (not shown) is provided in the space 10 between the inner panel plate 4 and the outer panel plate 5 so that the display section of the information transmission means can be seen through the glass panel plate which is the outer panel plate. It is preferable to set. By this information transmission means, the medical examination order, the route, etc. can be reliably transmitted to the medical examinee without the medical examinee emitting radiation going out of the booth unnecessarily or the medical staff entering or leaving the waiting room or waiting room. It becomes like this. As the information transmission means, a flat display comprising a liquid crystal display panel or a light emitting diode display plate can be used.

It is a perspective view which shows the construction example using the radiation shielding panel apparatus of this invention. It is a front view which shows the radiation shielding panel apparatus of 1st Embodiment of this invention, The right half has shown the outer side surface, and the left half has shown the inner surface. Similarly it is a cross-sectional view of the main part. It is the longitudinal cross-sectional view of the principal part similarly. It is a side view of a support | pillar. It is the longitudinal cross-sectional view of a support | pillar part similarly. It is a front view which shows the radiation shielding panel apparatus of 2nd Embodiment of this invention. Similarly it is a cross-sectional view of the main part. It is the longitudinal cross-sectional view of the principal part similarly. It is a front view which shows the radiation shielding panel apparatus of 3rd Embodiment of this invention. Similarly it is a cross-sectional view of the main part. It is the longitudinal cross-sectional view of the principal part similarly.

Explanation of symbols

A Unit partition panel B Booth C Open D Passage 1 Strut 2 Baseboard 3 Upper connecting rod 4 Inner panel plate 5 Outer panel plate 6 Radiation shielding plate 6A Composite board 7 Headboard 8 Side cover 9 Adjuster 9A Adjuster receiver 9B Adjuster bolt 10 Space 11 Opening 12 Groove 13 Fixed piece 14 Connecting bracket 15 Fitting piece 16 Locking tool 17 Holding bracket 17A Holding piece 17B Holding piece 18 Core material 19 Glass plate 20 Holding frame 21 Folding piece 22 Flexi board 23 Insertion member

Claims (6)

  A panel plate is provided on both sides of the column, and a panel plate that is provided between the columns so as to block the inside and outside with a radiation shielding plate with a predetermined thickness sufficient for shielding gamma rays such as a lead plate. A self-supporting panel structure in which a plurality of lines can be continuously provided in a straight line shape and a bent shape, and an opening is provided in at least a part of a L shape, a T shape, or a U shape in plan view A radiation shielding panel device characterized by being a body.   The inner panel plate and the outer panel plate are detachably attached to both front and back sides of the column that is erected on both sides, and the radiation shielding plate is installed in the space between the both column columns and the inner panel plate and the outer panel plate. The radiation shielding panel device according to claim 1, further comprising:   The radiation shielding panel device according to claim 2, wherein the radiation shielding plate having a predetermined thickness is attached to the support using a holding metal member irrespective of the inner panel plate and the outer panel plate.   Using a plurality of radiation shielding plates that add up to a predetermined plate thickness in total, at least one of the radiation shielding plates is directly bonded to the back surface of the inner panel plate or the outer panel plate, and integrated with other radiation shielding plates. A plate is attached to the support column using a holding bracket in the space between the inner panel plate and the outer panel plate, or directly bonded to the back surface of the other inner panel plate or outer panel plate, or other A radiation shielding plate is attached to the support column using a holding bracket in the space between the inner panel plate and the outer panel plate, and is further bonded and integrated directly to the back surface of the other inner panel plate or outer panel plate. The radiation shielding panel device according to claim 2.   The support column is a hollow casing, and has an opening in a part of one surface facing the space between the inner panel plate and the outer panel plate, and the radiation shielding plate is inserted into the support column from the opening. The radiation shielding panel device according to claim 2, wherein the radiation shielding panel device is attached so as to block the internal space. Information transmission means is provided in the space between the inner panel plate and the outer panel plate, and one of the inner panel plate and the outer panel plate is a glass panel plate, and the display unit of the information transmission device is set to be visible through the glass panel plate. The radiation shielding panel device according to any one of claims 2 to 5.

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