JPH02173600A - Medical radiation shielding chamber - Google Patents

Medical radiation shielding chamber

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Publication number
JPH02173600A
JPH02173600A JP63327681A JP32768188A JPH02173600A JP H02173600 A JPH02173600 A JP H02173600A JP 63327681 A JP63327681 A JP 63327681A JP 32768188 A JP32768188 A JP 32768188A JP H02173600 A JPH02173600 A JP H02173600A
Authority
JP
Japan
Prior art keywords
radiation
entrance
chamber
exit door
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP63327681A
Other languages
Japanese (ja)
Inventor
Yasuo Ueda
上田 八壽男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP63327681A priority Critical patent/JPH02173600A/en
Publication of JPH02173600A publication Critical patent/JPH02173600A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To obtain the shielding chamber in which it is unnecessary to use a radiation shielding material for an entrance door by providing a projecting part on the wall surface of an L-shaped passage so that primary scattered rays of a radiation from a radiation radiating chamber do not reach directly the entrance door. CONSTITUTION:In the radiation shielding chamber, a radiation radiating chamber 10 and an operating chamber 17 are provided. In a radiation for reaching an entrance door of a radiation shielding chamber having an L-shaped passage, primary scattered rays become a problem as to its intensity. Therefore, on the wall surface of the L-shaped passage 18 for communicating with the radiation radiating chamber 10, a projecting part protruded in the horizontal direction is provided, and also, the operating chamber 17 is placed between the radiation radiating chamber 10 and a passage 19 for communicating with an entrance door 16. Height of this projecting part 13a is the same as height of the wall. In such a way, only scattered rays after secondary scattered rays reach the entrance door 16. The sum total of these scattered rays is a very small quantum, and sufficiently below a law control value. Accordingly, it becomes unnecessary to use a radiation shielding material for the entrance door 16.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、L字型通路を有する医療用放射線遮蔽室に
関し、特に、L字型通路の構造に特徴のある医療用放射
線遮蔽室に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a medical radiation shielding chamber having an L-shaped passageway, and particularly to a medical radiation shielding chamber characterized by the structure of the L-shaped passageway.

[従来の技術] 従来のL字型通路を有する医療用放射線遮蔽室の平面配
置図を第4図に示す。医療用放射線遮蔽室には、放射線
照射室10と操作室17とが設けられている。この放射
線照射室10は、その出入り口を除いて、一部に鉄板1
4を内蔵しているコンクリート壁13によって囲まれて
いる。このコンクリート壁13は、放射線照射室10か
らの放射線を遮蔽する働きをする。そして、操作室17
は、コンクリート壁13の外側に設置されている。
[Prior Art] FIG. 4 shows a plan layout of a conventional medical radiation shielding room having an L-shaped passage. The medical radiation shielding room is provided with a radiation irradiation room 10 and an operation room 17. This radiation irradiation room 10 is partially equipped with iron plates except for its entrance and exit.
It is surrounded by a concrete wall 13 containing 4. This concrete wall 13 functions to shield radiation from the radiation irradiation room 10. And the operation room 17
is installed outside the concrete wall 13.

放射線照射室10の出入り口に通じる通路18と、医療
用放射線遮蔽室の外部との出入り口扉16に通じる通路
19とは、出入り口扉16から放射線照射室10が直接
、見通せないように直交している。つまり、通路18と
通路19とで、L字型通路構造を形成している。このL
字型通路構造により、放射線照射室10から出入り口扉
16へ直接、放射線が照射されることはない。さらに、
通路18には、天井面から下に向かって、人や機材が通
れる高さまで、下り壁15が設けられている。
A passage 18 leading to the entrance/exit of the radiation irradiation room 10 and a passage 19 leading to the entrance/exit door 16 to the outside of the medical radiation shielding room are orthogonal to each other so that the radiation irradiation room 10 cannot be directly seen from the entrance/exit door 16. . In other words, the passage 18 and the passage 19 form an L-shaped passage structure. This L
Due to the letter-shaped passage structure, radiation is not directly irradiated from the radiation irradiation room 10 to the entrance/exit door 16. moreover,
The passage 18 is provided with a descending wall 15 extending downward from the ceiling surface to a height that allows people and equipment to pass through.

放射線照射室10の中には、医療用高エネルギーX線発
生装置11と、これに付属する治療台12とが設置され
ている。医療用高エネルギーX線発生装置11と治療台
12とで、医療用放射線治療装置を構成している。この
医療用高エネルギーX線発生装置11は、治療台12上
の患者の患部に向けて利用線錐(主ビーム)を照射する
。このX線発生装置11のX線照射部を有するガントリ
部は、第4図の直線X上の垂直平面内を、直線Xと直線
Yとの交点Gから所定距離だけ離れていて、このG点を
回転中心(アイソセンター)として、360度回転する
ことができる。そして、任意の回転位置から、一定範囲
内の可変絞りを有するコリメータを通じて、利用線錐を
G点に向かって照射する。ガントリ部の回転移動を水平
面上に投影すると、直線X上の点Aと点Bの間の範囲に
なる。この利用線錐の遮蔽として、天井、床、壁に鉄板
を埋め込む必要がある。ただし、放射線照射室10の下
に部屋がなく、地面であるならば、床に鉄板を埋め込む
必要はない。コンクリート壁13の内部に鉄板14が埋
め込まれている状態が第4図に示されている。第4図に
おいては、天井、床に埋め込んだ鉄板は、図示していな
い。また、医療用高エネルギーX線発生装置11からは
、利用線錐以外に漏洩線(通常、利用線錐の0.1〜0
.5%)も放射状に照射される。
Inside the radiation irradiation room 10, a medical high-energy X-ray generator 11 and a treatment table 12 attached thereto are installed. The medical high-energy X-ray generator 11 and the treatment table 12 constitute a medical radiation therapy apparatus. This medical high-energy X-ray generator 11 irradiates a beam cone (main beam) toward an affected area of a patient on a treatment table 12 . The gantry section having the X-ray irradiation section of the X-ray generator 11 is located a predetermined distance away from the intersection G of the straight line X and the straight line Y in a vertical plane on the straight line X in FIG. It can be rotated 360 degrees around the center of rotation (isocenter). Then, from any rotational position, the beam cone is irradiated toward point G through a collimator having a variable aperture within a certain range. If the rotational movement of the gantry section is projected onto a horizontal plane, it will be in the range between points A and B on straight line X. To shield the wire beams used, it is necessary to embed iron plates in the ceiling, floor, and walls. However, if there is no room under the radiation irradiation room 10 and it is on the ground, there is no need to embed an iron plate in the floor. FIG. 4 shows a state in which the iron plate 14 is embedded inside the concrete wall 13. In FIG. 4, the iron plates embedded in the ceiling and floor are not shown. In addition, from the medical high-energy X-ray generator 11, leakage rays (usually 0.1 to 0
.. 5%) is also irradiated radially.

出入り口扉16には、法規制により、照射中断機構(ド
アインターロック)が付いている。この照射中断機構に
より、医療用高エネルギーX線発生装置11がX線を照
射しているときに、出入り口扉16を開けると、自動的
にX線の照射が中断されるようになっている。
The entrance/exit door 16 is equipped with an irradiation interruption mechanism (door interlock) according to legal regulations. With this irradiation interruption mechanism, when the entrance/exit door 16 is opened while the medical high-energy X-ray generator 11 is irradiating X-rays, the irradiation of X-rays is automatically interrupted.

[発明が解決しようとする課題] 上述した従来の医療用放射線遮蔽室においては、医療用
高エネルギーX線発生装置11から放射状に漏洩線がで
る。この漏洩線のうち一部は、通路18を通り、通路1
8.19の壁面、天井面、床面に当たる。そして、それ
らの面で散乱(−次散乱)し、出入り口扉16へ到達す
る。以下、この−次散乱によって生じた散乱線を一次散
乱線という。
[Problems to be Solved by the Invention] In the conventional medical radiation shielding room described above, leakage rays are radially emitted from the medical high-energy X-ray generator 11. A part of this leakage line passes through the passage 18 and passes through the passage 1
8. Hits the wall, ceiling, and floor of 19. Then, the light is scattered on those surfaces (-th order scattering) and reaches the entrance/exit door 16. Hereinafter, the scattered rays generated by this -order scattering will be referred to as primary scattered rays.

従来の遮蔽室における一次散乱線の漏洩ルートを第5図
に示す。漏洩ルートとしては、床面、あるいは、天井面
で散乱し、出入り口扉16へ到達するルート(例えば、
二点鎖線21・二点鎖線31のルート)と、壁面で散乱
し、出入り口扉16へ到達するルート(例えば、二点鎖
線22・二点鎖線32のルート)とがある。詳しく述べ
ると、第4図の見取り図中の漏洩照射領域20(漏洩照
射線が直接当たる可能性のある領域・・・右下がりの斜
線で示す)と、見通し領域30(出入り口扉から直接見
通せる領域・・・左下がりの斜線部)とが重なる領域(
二重斜線部)40内の壁面、天井面、床面で一次散乱が
起これば、−次数乱線は出入り口扉16へ到達する。出
入り口扉16から外部に洩れる放射線漏洩量には、法規
制値(−週間当たり30ミリレム以下)が設定されてい
る。従来の技術の場合(第4図、第5図)においては、
出入り口扉16へ達する一次散乱線が、この法規制値の
数倍から一桁程度大きな値になる。したがって、出入り
口扉16には、厚さ数mmの鉛板を取り付ける必要があ
る。さらに、医療用高エネルギーX線発生装置11のX
線エネルギーが10MV以上になると、医療用高エネル
ギーX線発生装置11から発生する中性子の一次散乱線
もX線の一次散乱線と同じ位の量になる。この中性子の
一次散乱線を遮蔽するためには、厚さ50mm程度のポ
リエチレン等を出入り口扉16に取り付ける必要がある
FIG. 5 shows the leakage route of primary scattered radiation in a conventional shielded room. The leakage route includes a route where the leakage is scattered on the floor or ceiling and reaches the entrance/exit door 16 (for example,
There are two routes: a route indicated by a chain double-dot line 21 and a chain double-dot line 31), and a route in which the particles are scattered on the wall surface and reach the entrance/exit door 16 (for example, a route indicated by a chain double-dot line 22 and a chain double-dot line 32). To be more specific, the leakage irradiation area 20 (the area where the leakage irradiation rays may directly hit, indicated by the diagonal line downward to the right) and the visibility area 30 (the area that can be seen directly from the entrance/exit door) in the floor plan of FIG.・The area where the diagonal line (slanted downward to the left) overlaps (
If primary scattering occurs on the wall, ceiling, and floor within the double hatched area) 40, the -order random line reaches the entrance/exit door 16. The amount of radiation leaking to the outside from the entrance/exit door 16 is set to a legally regulated value (30 millirem or less per week). In the case of conventional technology (Figures 4 and 5),
The primary scattered radiation reaching the entrance/exit door 16 has a value ranging from several times to an order of magnitude larger than this legal regulation value. Therefore, it is necessary to attach a lead plate several mm thick to the entrance/exit door 16. Furthermore, the X of the medical high energy X-ray generator 11 is
When the ray energy becomes 10 MV or more, the amount of primary scattered rays of neutrons generated from the medical high-energy X-ray generator 11 becomes about the same as the primary scattered rays of X-rays. In order to shield the primary scattered rays of neutrons, it is necessary to attach polyethylene or the like with a thickness of about 50 mm to the entrance/exit door 16.

その結果、出入り口扉16は重厚となり、その開閉速度
は低下する。また、X線治療を受ける患者に対して、通
常のX線撮影室と異なったイメージをいだかせ、必要以
上に心理的不安を与えるという欠点もある。
As a result, the entrance/exit door 16 becomes heavy and its opening/closing speed decreases. Another drawback is that it gives patients undergoing X-ray treatment a different impression of an ordinary X-ray room, causing more psychological anxiety than necessary.

この発明の目的は、出入り口扉に放射線遮蔽材を使用し
なくてもよい医療用放射線遮蔽室を提供することである
An object of the present invention is to provide a medical radiation shielding room that does not require the use of radiation shielding materials on the entrance/exit door.

[課題を解決するための手段] 上記の目的を達成するために、この発明に係る医療用放
射線遮蔽室は、以下の特徴を有している。
[Means for Solving the Problems] In order to achieve the above object, the medical radiation shielding room according to the present invention has the following features.

出入り口扉に通じる第一の通路と放射線照射室に通じる
第二の通路とが直交し、これらの通路がL字型通路構造
を形成している医療用放射線遮蔽室において、 前記放射線照射室からの放射線の一次散乱線が前記出入
り口扉に直接到達しないように、前記り字型通路の壁面
に凸部を設けたことを特徴としている。
In a medical radiation shielding room in which a first passage leading to an entrance/exit door and a second passage leading to a radiation irradiation room are perpendicular to each other and these passages form an L-shaped passage structure, The present invention is characterized in that a convex portion is provided on the wall surface of the cross-shaped passage so that the primary scattered radiation does not directly reach the entrance/exit door.

すなわち、凸部は、通路の壁面から水平方向に突き出し
ている。凸部の垂直方向の高さは、通常、壁の高さと同
じである。あるいは、下がり壁の下面よりも少し高いと
ころまでとすることもできる。
That is, the convex portion projects horizontally from the wall surface of the passage. The vertical height of the protrusion is usually the same as the height of the wall. Alternatively, it can be set to a point slightly higher than the lower surface of the falling wall.

[作用] L字型通路を有する医療用放射線遮蔽室の出入り口扉に
到達する放射線で強度」ユ問題となるものは、−次数乱
線である。そこで、−次数乱線が、出入り口扉へ直接到
達しないように、L字型通路の壁面に凸部を設ける。す
ると、出入り口扉には、二次散乱線以降の散乱線だけが
到達する。これらの散乱線の総和は微量であり、法規制
値を十分に下回る。したがって、出入り口扉に放射線遮
蔽材を使用する必要がなくなる。
[Operation] The radiation that reaches the entrance/exit door of a medical radiation shielding room having an L-shaped passage and causes a problem of intensity is -order random lines. Therefore, a convex portion is provided on the wall surface of the L-shaped passage so that the -order random line does not directly reach the entrance/exit door. Then, only the scattered rays after the secondary scattered rays reach the entrance/exit door. The total amount of these scattered rays is very small and is well below the legal regulation value. Therefore, there is no need to use radiation shielding material for the entrance/exit door.

[実施例] 次に、図面を参照してこの発明の詳細な説明する。[Example] Next, the present invention will be described in detail with reference to the drawings.

第1図はこの発明の一実施例の平面配置図である。第1
図に示した医療用放射線遮蔽室には、放射線照射室10
と操作室17とが設けられている。
FIG. 1 is a plan layout diagram of an embodiment of the present invention. 1st
The medical radiation shielding room shown in the figure includes a radiation irradiation room 10
and an operation room 17 are provided.

この実施例の医療用放射線遮蔽室が、従来の遮蔽室(第
4図)と異なっているところは、放射線照射室10に通
じる通路18の壁面に、水平方向に突き出す凸部13a
を設けたことと、操作室17を放射線照射室10と出入
り口扉16に通じる通路19との間に配置したことであ
る。この凸部13aの高さは、壁の高さと同じである。
The difference between the medical radiation shielding chamber of this embodiment and the conventional shielding chamber (FIG. 4) is that a convex portion 13a protruding horizontally on the wall surface of the passage 18 leading to the radiation irradiation chamber 10.
and that the operation chamber 17 is arranged between the radiation irradiation chamber 10 and the passage 19 leading to the entrance/exit door 16. The height of this convex portion 13a is the same as the height of the wall.

第1図において、従来の遮蔽室(第4図)と同じ部分は
、同符号を用いている。
In FIG. 1, the same parts as in the conventional shielded room (FIG. 4) are designated by the same reference numerals.

次に、この実施例の一次散乱線の漏洩ルートを第2図に
示す。実施例においては、通路18を従来の遮蔽室(第
5図)よりも長くし、通路18の壁面に凸部13aを設
けている。その結果、漏洩照射領域20と見通し領域3
0とが重なる領域は存在しない。すなわち、X線(ある
いは中性子)の−次数乱線は、出入り口扉16へは到達
しない。
Next, FIG. 2 shows the leakage route of the primary scattered radiation of this embodiment. In the embodiment, the passage 18 is made longer than the conventional shielded chamber (FIG. 5), and a convex portion 13a is provided on the wall surface of the passage 18. As a result, leakage irradiation area 20 and line-of-sight area 3
There is no area where 0 overlaps. That is, the -order random rays of X-rays (or neutrons) do not reach the entrance/exit door 16.

したがって、出入り口扉16に到達する放射線量として
は、二次散乱以降の散乱線の総和を考えればよい。一般
に、放射線が壁面などで散乱すると、その散乱線の強度
は、散乱前の強度に比べて、きわめて小さくなる。例え
ば、100分の1以下になる。したがって、二次散乱以
降の散乱線の総和は、法規制値を十分に下回ることにな
る。
Therefore, the amount of radiation reaching the entrance/exit door 16 can be determined by considering the total amount of scattered radiation after secondary scattering. Generally, when radiation is scattered by a wall or the like, the intensity of the scattered radiation becomes extremely small compared to the intensity before scattering. For example, it will be less than 1/100. Therefore, the total sum of scattered radiation after secondary scattering is well below the legal regulation value.

第3図に、この実施例における二次散乱線の漏洩ルート
を示す。この漏洩ルートは、大別すると、四つのルート
に分けられる。第一のルートは、次のようなルートであ
る。天井面、あるいは、床面で一次散乱をし、その後、
−次数乱線が壁面で二次散乱をする。その二次散乱線が
、出入り口扉16へ到達する。例えば、第3図において
は、二点鎖線41・二点鎖線42・二点鎖線43で結ば
れたルートである。第二のルートは、−次散乱が壁面で
、二次散乱が天井面、あるいは、床面で起こるようなル
ートである。例えば、二点鎖線5に点鎖線52・二点鎖
線53で結ばれたルートである。第三のルートは、−次
散乱が壁面で、二次散乱も壁面で起こるようなルートで
ある。例えば、二点鎖線61・二点鎖線62・二点鎖線
63で結ばれたルートである。第四のルートは、−次散
乱が床面(あるいは天井面)で、二次散乱が天井面(あ
るいは床面)で起こるようなルートである(図示せず)
FIG. 3 shows the leakage route of secondary scattered radiation in this example. This leakage route can be roughly divided into four routes. The first route is as follows. After primary scattering on the ceiling or floor,
- Order random rays undergo secondary scattering on the wall surface. The secondary scattered rays reach the entrance/exit door 16. For example, in FIG. 3, the routes are connected by two-dot chain line 41, two-dot chain line 42, and two-dot chain line 43. The second route is a route in which -order scattering occurs on the wall surface and secondary scattering occurs on the ceiling surface or floor surface. For example, there is a route connected to the two-dot chain line 5 by the two-dot chain line 52 and the two-dot chain line 53. The third route is a route in which -order scattering occurs on the wall surface and secondary scattering also occurs on the wall surface. For example, there are routes connected by a chain double-dot line 61, a chain double-dot line 62, and a chain double-dot line 63. The fourth route is a route in which -order scattering occurs on the floor (or ceiling) and secondary scattering occurs on the ceiling (or floor) (not shown).
.

以上のように、この実施例においては、−次数乱線が出
入り口扉16へ到達しないので、出入り口扉16に対し
て、漏洩線遮蔽用の鉛板や、ポリエチレン等を取り付け
る必要がなくなる。その結果、出入り口扉16は、重厚
にならず、開閉も容易である。また、患者に対しても、
心理的圧迫を与えることがない。
As described above, in this embodiment, the -order random rays do not reach the entrance/exit door 16, so there is no need to attach a lead plate, polyethylene, etc. for shielding leakage radiation to the entrance/exit door 16. As a result, the entrance/exit door 16 does not become bulky and is easy to open and close. Also, for patients,
There is no psychological pressure.

上記の実施例においては、凸部13aの水平断面形状は
長方形であるが、長方形以外でもよい。
In the above embodiment, the horizontal cross-sectional shape of the convex portion 13a is rectangular, but it may be other than rectangular.

また、−次数乱線が出入り口扉16へ到達しないように
できるならば、凸部13aを通路18.19の壁面のど
こに設けてもよい。また、凸部13aを複数設けてもよ
い。
Further, as long as it is possible to prevent the -order random line from reaching the entrance/exit door 16, the convex portion 13a may be provided anywhere on the wall surface of the passage 18.19. Further, a plurality of convex portions 13a may be provided.

」二連の実施例は、医療用高エネルギーX線発生装置1
1のための遮蔽室であるが、この発明は、テレコバルト
やリモートアフロ−ディング等のR1線源を利用する遮
蔽室にも同様に適用できる。
” The double embodiment is a medical high-energy X-ray generator 1
1, but the present invention is equally applicable to shielded rooms that utilize R1 radiation sources such as telecobalt and remote aflooding.

[発明の効果] 以上説明したようにこの発明は、放射線の一次散乱線が
出入り口扉へ直接到達しないようにL字型通路の壁面に
凸部を設けることにより、出入り口扉に漏洩線遮蔽材を
使用しなくて済むという効果がある。
[Effects of the Invention] As explained above, the present invention provides a convex portion on the wall surface of the L-shaped passageway to prevent primary scattered radiation from directly reaching the entrance/exit door, thereby providing a leakage radiation shielding material to the entrance/exit door. It has the effect of not having to be used.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例の平面配置図、第2図は実
施例の一次散乱線の漏洩領域を説明するための平面配置
図、 第3図は実施例の二次散乱線の漏洩ルートを説明するた
めの平面配置図、 第4図は従来の技術の平面配置図、 第5図は従来の技術の一次散乱線の漏洩ルートを説明す
るための平面配置図である。 10・・・放射線照射室 3a・・・凸部 6・・・出入り口扉 8・・・通路(第二の通路) 9・・・通路(第一の通路)
Fig. 1 is a plan layout diagram of an embodiment of the present invention, Fig. 2 is a plan layout diagram for explaining the leakage area of primary scattered rays in the embodiment, and Fig. 3 is a plan layout diagram for explaining the leakage area of primary scattered rays in the embodiment. FIG. 4 is a plan layout diagram of a conventional technique. FIG. 5 is a plane layout diagram of a conventional technique explaining a leakage route of primary scattered rays. 10...Radiation irradiation room 3a...Protrusion 6...Entrance/exit door 8...Passage (second passage) 9...Passage (first passage)

Claims (1)

【特許請求の範囲】 出入り口扉に通じる第一の通路と放射線照射室に通じる
第二の通路とが直交し、これらの通路がL字型通路構造
を形成している医療用放射線遮蔽室において、 前記放射線照射室からの放射線の一次散乱線が前記出入
り口扉に直接到達しないように、前記L字型通路の壁面
に凸部を設けたことを特徴とする医療用放射線遮蔽室。
[Scope of Claims] A medical radiation shielding room in which a first passageway leading to an entrance/exit door and a second passageway leading to a radiation irradiation room are orthogonal to each other and these passageways form an L-shaped passageway structure, A radiation shielding room for medical use, characterized in that a convex portion is provided on the wall surface of the L-shaped passage so that primary scattered radiation rays from the radiation irradiation room do not directly reach the entrance/exit door.
JP63327681A 1988-12-27 1988-12-27 Medical radiation shielding chamber Pending JPH02173600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63327681A JPH02173600A (en) 1988-12-27 1988-12-27 Medical radiation shielding chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63327681A JPH02173600A (en) 1988-12-27 1988-12-27 Medical radiation shielding chamber

Publications (1)

Publication Number Publication Date
JPH02173600A true JPH02173600A (en) 1990-07-05

Family

ID=18201788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63327681A Pending JPH02173600A (en) 1988-12-27 1988-12-27 Medical radiation shielding chamber

Country Status (1)

Country Link
JP (1) JPH02173600A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034305A1 (en) * 1996-03-12 1997-09-18 Ebara Corporation SHIELDING FACILITY FOR X-RAYS OR η-RAYS
JPH11131655A (en) * 1997-10-31 1999-05-18 Sato Kogyo Co Ltd Radiation shielding partition
JP2006239101A (en) * 2005-03-03 2006-09-14 Hitachi Medical Corp X-ray diagnostic imaging apparatus
JP2007139605A (en) * 2005-11-18 2007-06-07 Taisei Corp Radiation irradiation facility
JP2009502221A (en) * 2005-07-22 2009-01-29 ゲーエスイー ゲゼルシャフト フュア シュヴェリオネンフォルシュンク エムベーハー Irradiation device
WO2016147047A1 (en) * 2015-03-17 2016-09-22 Varian Medical Systems Trading (Beijing) Co., Ltd. Prefabricated modular radiation therapy vault design
JP2018179851A (en) * 2017-04-18 2018-11-15 清水建設株式会社 Radiation shielding structure
JP2020159986A (en) * 2019-03-28 2020-10-01 東京電力ホールディングス株式会社 Radiation shielded building

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034305A1 (en) * 1996-03-12 1997-09-18 Ebara Corporation SHIELDING FACILITY FOR X-RAYS OR η-RAYS
JPH11131655A (en) * 1997-10-31 1999-05-18 Sato Kogyo Co Ltd Radiation shielding partition
JP2006239101A (en) * 2005-03-03 2006-09-14 Hitachi Medical Corp X-ray diagnostic imaging apparatus
JP2009502221A (en) * 2005-07-22 2009-01-29 ゲーエスイー ゲゼルシャフト フュア シュヴェリオネンフォルシュンク エムベーハー Irradiation device
JP2007139605A (en) * 2005-11-18 2007-06-07 Taisei Corp Radiation irradiation facility
WO2016147047A1 (en) * 2015-03-17 2016-09-22 Varian Medical Systems Trading (Beijing) Co., Ltd. Prefabricated modular radiation therapy vault design
US10265232B2 (en) 2015-03-17 2019-04-23 Varian Medical Systems Trading (Beijing) Co., Ltd. Prefabricated modular radiation therapy vault design
JP2018179851A (en) * 2017-04-18 2018-11-15 清水建設株式会社 Radiation shielding structure
JP2020159986A (en) * 2019-03-28 2020-10-01 東京電力ホールディングス株式会社 Radiation shielded building

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