JP6145364B2 - Radiation shielding wall design method, radiation shielding wall and hospital room equipped with the same - Google Patents

Description

  The present invention relates to a radiation shielding wall design method, a radiation shielding wall, and a hospital room provided with the radiation shielding wall.

  Conventionally, the radiation shielding apparatus or radiation shielding room described in the following Patent Documents 1 to 4 is known. In the radiation shielding apparatus described in Patent Document 1, a booth for each examinee to stand by in a PET (Positron Emission Tomography) inspection by arranging a plurality of self-supporting panel structures having a U-shape in plan view. Is forming. In the radiation shielding room described in Patent Document 2, an inner wall is provided in a room where a radiation generator is installed, and an opening and a small passage for an operator are provided between the inner wall and the wall surrounding the room. . In this shielding room, a route in which the radiation generated by the radiation generating device reaches the entrance door through the opening and a route to the entrance door through the small passage are considered.

  In the radiation shielding room described in Patent Document 3, a sleeve wall, a plurality of partition walls, and a falling wall having an opening in the lower part are provided in a room where the X-ray generator is installed. In this shielding room, consideration is given to the planar spread and height spread of the leakage lines generated from the X-ray generator. In the radiation shielding room described in Patent Document 4, a wall protruding toward the passage is provided so that the primary scattering surface cannot be seen from the entrance / exit in the room where the X-ray generator is installed.

JP 2006-275610 A Japanese Patent Laid-Open No. 2-77698 Japanese Patent Laid-Open No. 4-52598 JP-A-5-223987

  By the way, in radiotherapy or examination / diagnosis using, for example, RI (radioisotope), patients who receive treatment spend time in the hospital room. In that case, radiation can be emitted from the patient, but a sleeve wall or the like for shielding the radiation is provided in the patient room so that the emitted radiation does not leak from the entrance and the like of the patient room.

  On the other hand, for patients who spend in the hospital room, radiation shielding walls such as sleeve walls give the impression of being closed and dim. For example, even if a window or the like facing the outside is provided in the hospital room, the light inserted from the window or the like is blocked by the radiation shielding wall, and the room is not easily brightened. Thus, even if the conventional technique is applied, it is difficult to provide a radiation shielding wall that provides a bright and open atmosphere in a radiation therapy room.

  An object of the present invention is to provide a radiation shielding wall design method capable of providing a bright and open atmosphere in a hospital room, a radiation shielding wall, and a hospital room equipped with the radiation shielding wall.

The present invention relates to a design method of a radiation shielding wall provided in a hospital room facing the outdoors and having an opening capable of collecting outdoor light, the step of setting a radiation source in the hospital room, and the source and radiation shield A straight line connecting the end of the wall passes through the wall around the opening , and an upper space is formed between the end and the ceiling of the hospital room, and the opening from the upper space to the radiation shielding wall is Determining a position and an outer shape of a radiation shielding wall disposed between the generation source and the opening so that outdoor light is incident on the opposite region .

According to this radiation shielding wall design method, the position and outline of the radiation shielding wall arranged between the source and the opening are such that a straight line connecting the radiation source and the end of the radiation shielding wall is around the opening. Determined to pass through the wall. Therefore, a part of the radiation generated from the generation source is shielded by the radiation shielding wall, and the remaining part reaches the wall portion around the opening. This prevents radiation from leaking outside through the opening. Here, the end portion of the radiation shielding wall can be separated from the ceiling by the positional relationship with respect to the opening, so that outdoor light can be incident from the upper space which is a gap between the radiation shielding wall and the ceiling . As a result, indoor lighting is ensured, and a bright and open atmosphere can be provided in the hospital room. The “wall portion around the opening” broadly means a beam, a pillar, a floor, and the like in addition to the wall, and may be anything that can expect radiation shielding ability.

In the design method, in the step of determining the position and the outer shape, the radiation shielding wall may be curved so as to approach the generation source as it goes toward the end of the radiation shielding wall. According to this design method, the radiation shielding wall is curved so as to approach the generation source as it goes toward the end of the radiation shielding wall. Therefore, while maintaining the condition that the straight line connecting the source and the end of the radiation shielding wall passes through the wall around the opening, the vertical length (for example, height) or the horizontal direction of the radiation shielding wall is maintained. The length (for example, the width protruding into the room) can be kept small. Thereby, the size of the radiation shielding wall can be reduced, the feeling of pressure can be reduced, and the light incident on the patient room can be increased.

  Further, in the above design method, the step of determining the position and the outer shape includes the step of setting a plurality of discrete points corresponding to the end of the radiation shielding wall, and a straight line connecting each of the generation source and the discrete points. The outline of the radiation shielding wall is determined by complementing the process of determining the position of the end corresponding to each of the discrete points so as to pass through the surrounding wall and the end corresponding to each of the discrete points. And a process. According to this design method, a plurality of discrete points are set, and the positions of the end portions are determined based on these discrete points. And the external shape of a radiation shielding wall is determined by complementing between edge parts. In this way, the position and outer shape of the radiation shielding wall can be determined reliably and easily.

The present invention is a radiation shielding wall provided in a hospital room having an opening that faces the outdoors and can collect outdoor light, and is disposed between a radiation source and an opening located in the hospital room, and the source an outer circumferential edge portion when the connecting straight lines, straight lines have a contour that passes through the wall around the opening, from the upper space to form an upper space between the ceiling of the outer edge and the patient room and Outdoor light is incident on a region opposite to the opening .

The radiation shielding wall has an outer shape such that the straight line passes through the wall portion around the opening when the radiation source and the outer peripheral end portion are connected by a straight line. Therefore, a part of the radiation generated from the generation source is shielded by the radiation shielding wall, and the remaining part reaches the wall portion around the opening. This prevents radiation from leaking outside through the opening. Here, the end portion of the radiation shielding wall can be separated from the ceiling by the positional relationship with respect to the opening, so that outdoor light can be incident from the upper space which is a gap between the radiation shielding wall and the ceiling . As a result, indoor lighting is ensured, and a bright and open atmosphere can be provided in the hospital room. The “outer peripheral end” means the outer periphery of the radiation shielding wall, and includes all of the upper end portion or the distal end portion, the base end portion, the end portion on the floor surface side, and the like.

  Further, the radiation shielding wall may be curved so as to approach the generation source as it goes toward the outer peripheral end portion. According to this configuration, while maintaining the condition that the straight line connecting the generation source and the outer peripheral end portion of the radiation shielding wall passes through the wall portion around the opening, the length (for example, the height) of the radiation shielding wall is maintained. ) Or the length in the left-right direction (for example, the width protruding into the room) can be kept small. Thereby, the size of the radiation shielding wall can be reduced, the feeling of pressure can be reduced, and the light incident on the patient room can be increased.

  In the radiation shielding wall, the length in the vertical direction or the length in the left-right direction of the portion that curves so as to approach the generation source may become smaller toward the outer peripheral end. According to this configuration, since the height of the radiation shielding wall is reduced or the width of the radiation shielding wall is reduced, the feeling of pressure by the radiation shielding wall is further reduced, and the radiation is incident from above the radiation shielding wall. The light can be increased.

  As one embodiment of the present invention, a hospital room including the radiation shielding wall can be provided. In this hospital room, outdoor light is easily incident, so that daylighting is ensured and a bright and open atmosphere is provided.

  According to the present invention, a bright and open atmosphere can be provided in a hospital room.

It is a top view which shows one Embodiment of the hospital room and radiation shielding wall of this invention. It is a side view of the hospital room and radiation shielding wall of FIG. It is a top view which shows 1 process of the design method of a radiation shielding wall. It is a top view which shows the process of determining the height of an upper end part using a discrete point. It is a side view which shows the lighting condition in the hospital room shown in FIG. (A) is a top view of the hospital room provided with the radiation shielding wall by another example, (b) is a side view of (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, a hospital room 1 installed in a hospital is a hospital room used for radiotherapy or examination / diagnosis using, for example, RI (radioisotope), that is, an RI hospital room. The hospital room 1 includes a wall 2 facing the corridor, side walls 2 and 2, pillars 3 and 3 constituting a part of the outer wall, a floor on which the hospital room 1 is provided, and an upper floor thereof. Are defined by a ceiling 9 formed between them, a beam 12 provided between the pillars 3 and 3 and the ceiling 9, and a floor 11. The wall portion 2, the column portion 3, the ceiling 9, the beam portion 12, and the floor portion 11 all have radiation shielding ability, for example, by being provided with a lead plate or having a wall thickness sufficient for shielding radiation. doing. The wall portion 2, the column portion 3, the ceiling 9, the beam portion 12, and the floor portion 11 correspond to wall portions that define the hospital room 1.

  The hospital room 1 has an opening 6 facing the outdoors, and a window 7 is fitted in the opening 6. In this way, the opening 6 can receive light from the outdoors. In addition, the magnitude | size and installation position of the opening 6 are not specifically limited. The opening 6 is not limited to facing the outdoors, and may face another room. The window 6 may not be provided in the opening 6.

  In the hospital room 1, a bed B is provided for a patient to receive RI treatment or a person to receive RI examination / diagnosis. A sleeve wall 8 having a radiation shielding capability is provided between the bed B and the entrance 4. This sleeve wall 8 is for preventing the radiation emitted from the patient or the examinee from leaking to the corridor side.

  A radiation shielding wall 10 is provided between the bed B and the opening 6 to shield radiation emitted from the patient or the examinee. The radiation shielding wall 10 has a layered structure in which, for example, a lead plate is sandwiched between wooden plywoods and the like.

  As shown in FIG. 1, the radiation shielding wall 10 is provided so as to protrude from the side wall portion 2 toward the room. The proximal end portion 10 a of the radiation shielding wall 10 is connected to the side wall portion 2, while the distal end portion 10 b extends toward the center of the hospital room 1. In other words, the radiation shielding wall 10 is erected on one end side in the longitudinal direction of the bed B and has a curved shape so as to cover a part of the side of the bed B.

  As shown in FIG. 2, the base end portion 10 a of the radiation shielding wall 10 is provided so as to reach from the floor portion 11 to the ceiling 9. The height of the radiation shielding wall 10 is lower than the ceiling 9 at the portion facing the opening 6. More specifically, the radiation shielding wall 10 is curved so as to approach the bed B from the proximal end portion 10a toward the distal end portion 10b, and the height of the curved portion 10c (that is, the length in the vertical direction) is , It becomes lower toward the tip 10b.

  As described above, the upper space S is formed between the curved portion 10 c of the radiation shielding wall 10 and the ceiling 9 by gently inclining the upper end portion of the radiation shielding wall 10 toward the indoor side. . The radiation shielding wall 10, the opening 6 for collecting outdoor light, the wall portion 2 for shielding radiation, the column portion 3, the ceiling 9, the beam portion 12, and the floor portion 11 according to this embodiment. A radiation shielding structure A is formed. In the radiation shielding structure A, the upper space S is formed, whereby a bright and open atmosphere is formed, and a space that is comfortable for the patient or the patient in the hospital room 1 is provided.

  Next, a method for designing the radiation shielding wall 10 will be described. In designing the radiation shielding wall 10, a radiation source X in the hospital room 1 is set. The generation source X can be a single point on the bed B, for example, assuming the center of the patient or patient's body lying on the bed B. The generation source X may be a single point or an area having a certain range.

  As shown in FIG. 3, when the radiation generation source X is set, a straight line connecting the generation source X and the end portion (outer peripheral end portion) of the radiation shielding wall 10 passes through the wall portion around the opening 6. As described above, the position and the outer shape of the radiation shielding wall 10 disposed between the generation source X and the opening 6 are determined. More specifically, the radiation is such that a straight line connecting the generation source X and the upper end portion (outer peripheral end portion) 10 e and the distal end portion (outer peripheral end portion) 10 b of the radiation shielding wall 10 passes through the wall portion around the opening 6. The position and outer shape of the shielding wall 10 are determined. Here, the radiation shielding wall 10 is bent so as to approach the generation source X as it goes from the base end portion 10a to the tip end portion 10b.

  Here, the “wall portion around the opening 6” broadly means a beam portion 12, a column portion 3, a floor portion 11, a ceiling 9, etc., in addition to a so-called wall such as the wall portion 2. In other words, the “wall portion around the opening 6” may be anything as long as radiation shielding ability is expected. Moreover, the edge part (outer periphery edge part) of the radiation shielding wall 10 means the outer periphery of the radiation shielding wall 10, for example, the edge part (base end part, floor side) (the upper end part 10e or the distal end part 10b). That is, it includes all of the lower end portion). In other words, when the radiation shielding wall 10 is connected to a wall portion that defines the hospital room 1, a base end portion (for example, the base end portion 10a described above) that is a connection portion between the radiation shielding wall 10 and the wall portion is provided. Corresponds to one of the ends of the radiation shielding wall 10. Furthermore, when the radiation shielding wall 10 protrudes toward the inside of the hospital room 1, a terminal portion (for example, the above-described distal end portion 10 b) located in the hospital room 1 corresponds to one end of the radiation shielding wall 10. To do.

  More specifically, as shown in FIG. 4, an intermediate portion in the thickness direction of the radiation shielding wall 10 corresponding to a portion where the lead plate 10 f is disposed is set as a reference position of the upper end portion 10 e, and on the upper end portion 10 e, A plurality of discrete points P1, P2, and P3 that are separated from each other are set. Next, imaginary straight lines L1, L2, L3 connecting the generation source X and the discrete points P1, P2, P3 pass through the wall portion around the opening 6 (for example, the beam portion 12 above the opening 6), The positions of the three upper end portions 10e corresponding to the discrete points P1, P2, and P3 are determined. In other words, the position of the upper end portion 10e is determined so that the ends of the straight lines L1, L2, L3 are not located in the opening 6. Then, by complementing between the determined three upper end portions 10e, the outer shape of the upper portion of the radiation shielding wall 10, that is, the height of the upper end portion 10e is determined.

  As shown in FIG. 4, the discrete point P2 is closer to the source X than the discrete point P1, and the discrete point P3 is closer to the source X than the discrete point P2. When the upper end of the opening 6 is horizontal, the positions of the three upper end portions 10e corresponding to the discrete points P1, P2, and P3 become lower as they approach the tip end portion 10b. As a result of the complement, the upper end portion 10e of the radiation shielding wall 10 is gently inclined toward the distal end portion 10b. In this way, a curved portion 10c that is a portion facing the opening 6 is formed.

  By the above design method, the radiation shielding wall 10 having an outer shape in which the straight line passes through the wall portion around the opening 6 when the generation source X and the upper end portion 10e are connected by a straight line is designed. In other words, in the design method of the radiation shielding wall 10, when the radiation shielding wall 10 is projected toward the opening 6 (outdoor) using the generation source X as a light source, the entire opening 6 is covered by the projection image of the radiation shielding wall 10. Design as expected.

  According to the design method of the radiation shielding wall 10 and the radiation shielding wall 10 described above, the position and the outer shape of the radiation shielding wall 10 disposed between the generation source X and the opening 6 are the same as the generation source X and the radiation shielding wall 10. The straight lines L1, L2, and L3 (see FIG. 4) that connect the upper end portion 10e are determined so as to pass through the wall portion (the beam portion 12 and the like) around the opening 6. Therefore, a part of the radiation generated from the generation source X is shielded by the radiation shielding wall 10, and the remaining part reaches the wall portion around the opening 6. This prevents radiation from leaking outside through the opening 6. Here, the end of the radiation shielding wall 10 can be separated from the ceiling 9, the floor 11, the wall 2, and the like by the positional relationship with respect to the opening 6 (for example, the upper end 10 e is separated from the ceiling 9). Outdoor sunlight or the like enters through a gap (for example, the upper space S) between the radiation shielding wall 10 and the ceiling 9, the floor 11, the wall 2, etc. (see FIG. 5). As a result, the daylighting into the hospital room 1 is ensured, and a bright and open atmosphere can be brought to the hospital room 1.

  Here, as shown in FIG. 6A and FIG. 6B, the radiation shielding wall 100 can be cited as another example. In the radiation shielding wall 100, the distal end portion 100b covers the bed B excessively, giving a somewhat closed impression to the patient. Moreover, since the lighting through the opening 6 is not taken into consideration, the upper end portion 100e reaches the ceiling 9, and the patient's room tends to be dim. According to the radiation shielding wall 10 and the radiation shielding wall 10 design method described above, the upper space S is formed between the ceiling 9 and the radiation shielding wall 10 without extending the radiation shielding wall 10 in a range that can be shielded by a wall portion such as an outer wall. . Therefore, the relaxing hospital room 1 is realized without giving such a closed or dim impression.

  Further, since the radiation shielding wall 10 is curved so as to approach the generation source X from the proximal end portion 10a toward the distal end portion 10b, straight lines L1 and L2 connecting the generation source X and the upper end portion 10e of the radiation shielding wall 10 are formed. , L3 (see FIG. 4) pass through the wall around the opening 6 while maintaining the vertical length (for example, height) or the horizontal length (for example, the height of the radiation shielding wall 10). The width protruding into the hospital room 1 is kept small. Thereby, the size of the radiation shielding wall 10 can be reduced, the feeling of pressure is reduced, and further, light such as sunlight entering the hospital room 1 increases.

  In addition, since the height of the bending portion 10c that curves so as to approach the generation source X decreases toward the distal end portion 10b, the feeling of pressure by the radiation shielding wall 10 is further reduced, and the radiation shielding wall 10 is further reduced. Incident light from the upper space S above is increased.

  A plurality of discrete points P1, P2, and P3 are set, and the position of the upper end portion 10e is determined based on these discrete points P1, P2, and P3. And the external shape of the upper part of the radiation shielding wall 10 is determined by complementing between the upper end parts 10e. In this way, the position and outer shape of the radiation shielding wall can be determined reliably and easily.

  In the hospital room 1, outdoor light is easily incident, so that daylighting is ensured and a bright and open atmosphere is provided.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, a straight line may be drawn using only one point without setting discrete points P1, P2, and P3. The present invention is not limited to the case where the bending portion 10c is gently inclined, and the bending portion 10c may be formed in a step shape. The curved portion 10 c may be formed at a certain height and separated from the ceiling 9.

  The room 1 is not limited to the case where the bed B is installed. Sick room 1 may be a mere living room of a patient or a examinee in which chairs, tables, and the like are arranged. The patient room 1 is not limited to the RI patient room. The present invention can be applied to any hospital room related to treatment / examination / diagnosis using radiation.

  In the above embodiment, the case where the upper end portion 10e or the front end portion 10b corresponds to the “outer peripheral end portion” has been described, but the present invention is not limited thereto. The “outer peripheral end” may be, for example, a base end or a lower end. In the above-described embodiment, the case where spaces are formed between the upper end portion 10e and the ceiling 9 and between the distal end portion and the wall portion 2 has been described, but the present invention is not limited thereto. If the projection image of the radiation shielding wall covers the opening, for example, a gap or a space may be formed between the lower end and the floor surface, or between the base end and the side wall.

In the above embodiment, the case where the base end portion 10 a of the radiation shielding wall 10 is connected to the wall portion 2 has been described. However, the radiation shielding wall may be formed apart from the wall portion 2. For example, depending on the position of the bed B, a radiation shielding wall may be installed at the center of the hospital room 1. When both ends in the width direction of the radiation shielding wall are separated from the wall portion 2, the radiation shielding wall may be curved so as to approach the generation source X from the central portion in the width direction toward both ends. In this case, the radiation shielding wall is formed on the side of the bed B, rises from the floor 11, and can have a curved shape in a horizontal cross section.

Moreover, although said embodiment demonstrated the case where the radiation shielding wall 10 was curved from the base end part 10a to the front-end | tip part 10b, you may curve another outer peripheral end part. For example, the radiation shielding wall 10 may be curved from the central portion to the upper end portion or the lower end portion of the radiation shielding wall so as to bring the radiation shielding wall closer to the generation source. In this case, the length in the left-right direction, that is, the width of the radiation shielding wall becomes smaller toward the upper end portion or the lower end portion.

  DESCRIPTION OF SYMBOLS 1 ... Hospital room, 2 ... Wall part, 3 ... Column part (wall part), 6 ... Opening, 9 ... Ceiling (wall part), 10 ... Radiation shielding wall, 10a ... Base end part, 10b ... Tip part (outer peripheral end part) ) 10c: curved portion (curved portion), 10e: upper end portion (outer peripheral end portion), 11 ... floor portion (wall portion), 12 ... beam portion (wall portion), L1, L2, L3 ... straight line, P1, P2, P3 ... discrete points, S ... upper space, X ... source.

Claims (7)

A method for designing a radiation shielding wall that is provided in a hospital room that faces the outdoors and has an opening capable of collecting the outdoor light,
Setting a source of radiation in the hospital room;
A straight line connecting the source and the end of the radiation shielding wall passes through the wall around the opening , and an upper space is formed between the end and the ceiling of the patient room. The position and outer shape of the radiation shielding wall disposed between the source and the opening are determined so that the outdoor light is incident on a region opposite to the opening from the radiation shielding wall. And a process of
A method for designing a radiation shielding wall, comprising: 2. The radiation shielding wall according to claim 1, wherein in the step of determining the position and the outer shape, the radiation shielding wall is curved so as to approach the generation source as it goes toward an end of the radiation shielding wall. Design method. The step of determining the position and the outer shape includes
Setting a plurality of discrete points corresponding to the ends of the radiation shielding wall;
Determining a position of an end corresponding to each of the discrete points such that a straight line connecting the source and each of the discrete points passes through a wall around the opening;
The method for designing a radiation shielding wall according to claim 1, further comprising: determining an outer shape of the radiation shielding wall by complementing between ends corresponding to the discrete points. . A radiation shielding wall provided in a hospital room facing the outdoors and having an opening capable of collecting the outdoor light,
Arranged between the source of radiation located in the hospital room and the opening;
When connecting the said source and the outer peripheral edge portion in a straight line, it has a contour that passes through the wall around the straight line of the opening, an upper space between the ceiling of the hospital room and the outer peripheral end portion The radiation shielding wall is characterized in that the outdoor light is incident on a region opposite to the opening from the upper space .   The radiation shielding wall according to claim 4, wherein the radiation shielding wall is curved so as to approach the generation source as it goes toward the outer peripheral end.   The radiation shielding wall according to claim 5, wherein a length in a vertical direction or a length in a horizontal direction of a portion that curves so as to approach the generation source decreases toward the outer peripheral end. .   A hospital room provided with the radiation shielding wall according to any one of claims 4 to 6.

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