JPS5875082A - Radiation detector - Google Patents

Radiation detector

Info

Publication number
JPS5875082A
JPS5875082A JP17376581A JP17376581A JPS5875082A JP S5875082 A JPS5875082 A JP S5875082A JP 17376581 A JP17376581 A JP 17376581A JP 17376581 A JP17376581 A JP 17376581A JP S5875082 A JPS5875082 A JP S5875082A
Authority
JP
Japan
Prior art keywords
radiation
optical fiber
light
radiation detector
scintillator
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
JP17376581A
Other languages
Japanese (ja)
Inventor
Yujiro Naruse
雄二郎 成瀬
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP17376581A priority Critical patent/JPS5875082A/en
Publication of JPS5875082A publication Critical patent/JPS5875082A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
    • G01T1/164—Scintigraphy
    • G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
    • G01T1/1644—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras using an array of optically separate scintillation elements permitting direct location of scintillations

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measurement Of Radiation (AREA)

Abstract

PURPOSE:To measure a radiation intensity distribution with a high space resolution, by constituting a detector with aggregation of plural unit detection areas having scintillators separated from one another and separating unit detecting area from one another by wires having a high stopping capability for radiation and light. CONSTITUTION:The plane of incidence of radiation is as shown in figure by (a), and its section A-A' is as shown in figure by (b). Square optical fibers where scintillators 1 are core parts and plastic coating layers 2 are clad parts are arranged two-dimensionally. A tungsten wire 3 is wound around the tip part of each optical fiber, and a light reflective film 4 is provided on the end face of incidence of each optical fiber, and the light generated in the scintillator 1 is led to a photodetector efficiently.

Description

【発明の詳細な説明】 （１）発明の技術分野 この発明は、シンチレータを用いた放射線強度分布の空
間分解能を有する放射線検出器に関する。DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a radiation detector using a scintillator and having a spatial resolution of radiation intensity distribution.

（２）従来技術 所定面積のシンチレータで放射線を受け、そのシンチレ
ータの各区分領域から発せられる光を光ファイバーによ
りＣＯＤ等の光検出器６；導いて、二次元的放射線強度
分布を測定する二次元放射線検出器が知られている。(2) Prior art Two-dimensional radiation that receives radiation with a scintillator of a predetermined area, and guides the light emitted from each segmented area of the scintillator through an optical fiber to a photodetector 6 such as a COD to measure the two-dimensional radiation intensity distribution. detectors are known.

１３）従来技術の問題点 上記従来技術では、シンチレータの各区分領域が機械的
に分離されているわけではない、セしてシンチレータが
放射線と相互作用して発する光は一般に等方的であるの
で、光ファイバの入射面で光のりａストークが生じ、放
射線強度分布１一対する空間分解能が低い、また光ファ
イノ奢の入射面での放射線散乱（コンプトン効果）（二
よっても放射線のクロストークが生じる。13) Problems with the prior art In the prior art described above, each section of the scintillator is not mechanically separated, and the light emitted by the scintillator when it interacts with radiation is generally isotropic. , a light beam stalk occurs at the entrance surface of the optical fiber, and the spatial resolution for the radiation intensity distribution is low, and radiation crosstalk also occurs due to radiation scattering (Compton effect) at the entrance surface of the optical fiber. .

空間分解能を上げるため、例えば蜂の巣状のプリメータ
板により機械的に分離された単位領賊（二Ｖンデレータ
を充填することが考えられる。In order to increase the spatial resolution, it is conceivable to fill the unit carriers (two Vndelators) mechanically separated by, for example, honeycomb-shaped premeter plates.

しかしこの方式では、単位検出領域が１■角程度の小さ
いものを高精度に１作ることが難しい。However, with this method, it is difficult to create a small unit detection area of about 1 square with high precision.

（４）発明の目的 この発明の目的は、放射線強度分布に対する空間分解能
に優れた、シンチレータを用いた放射線検出器を提供す
るにある。(4) Purpose of the Invention The purpose of the present invention is to provide a radiation detector using a scintillator that has excellent spatial resolution for radiation intensity distribution.

（５）発明の概要 この発明：二係る放射線検出器は、相互（二分離された
シンチレータを有する複数の単位検出領域の集合により
構成され、かつ各単位検出領域間が放射線および光に対
して阻止能の大なるワイヤにより区分分離されているこ
とを特徴とする。この発明（二よれば、空間分解能の高
い放射線強度分布の測定が可能となる。(5) Summary of the Invention This invention: The radiation detector according to the second aspect is constituted by a set of a plurality of unit detection areas having scintillators separated from each other (in two), and the area between each unit detection area blocks radiation and light. According to this invention (2), it is possible to measure the radiation intensity distribution with high spatial resolution.

（６）発明の実施例 第１図に本発明の実施例を示す、（ａ）は放射線入射面
を示し、（ｂ）はその人−ＡＩ断面を示している。放射
線の単位検出領域は、シンチレータ１をコア部とし、プ
ラスチックコーティング層１をクラッド部とする矩形光
ファイノ月二より構成されており、これを二次元的に配
列している。(6) Embodiment of the Invention An embodiment of the invention is shown in FIG. 1, where (a) shows a radiation incident surface, and (b) shows the person-AI cross section. The radiation unit detection area is composed of rectangular optical fibers having the scintillator 1 as a core part and the plastic coating layer 1 as a cladding part, which are arranged two-dimensionally.

各光ファイノ青先端部外周には、タングステンワイヤ１
が巻きつけられている。また光ファイΔ入射端面Ｃ二は
光反射膜４を設け、シンチレータようになっている。A tungsten wire 1 is attached to the outer periphery of each optical fiber blue tip.
is wrapped around it. Further, the optical fiber Δ incident end face C2 is provided with a light reflecting film 4 to act as a scintillator.

本実施例Ｃ：よれば、タングステンワイヤＪによって単
位検出領域間の光および放射線のクロストークが抑制さ
れ、放射線強度分布に対する高い空間分解能が得られる
。しかも予め単位検出領域をコリメータ板で蜂の巣状ζ
：分割する構、造に比べ、光ファイバの先端部Ｃニタン
グステンワイヤを巻きつけたものを二次元的Ｃ；配列す
ること（−より構成されるため、単位検出領域が微小な
検出器を精度よく製作することが容易である。According to Example C, crosstalk of light and radiation between unit detection areas is suppressed by the tungsten wire J, and high spatial resolution for radiation intensity distribution is obtained. Moreover, the unit detection area is set in advance in a honeycomb shape ζ using a collimator plate.
: Compared to the splitting structure, the tip of the optical fiber C wrapped with tungsten wire is arranged in a two-dimensional C; Easy to manufacture well.

第２図は本発明の他の実施例を説明するための図である
。この例は、−）≦二示すように透明容器１１にマトリ
クス状−二タングステンワイヤ１２をはりめぐらせて単
位検出領域を分離し。FIG. 2 is a diagram for explaining another embodiment of the present invention. In this example, a matrix of two tungsten wires 12 is wrapped around a transparent container 11 as shown in -)≦2 to separate unit detection areas.

これ６；液体シンチレータ（図示せず）を流し込む形式
のものである。１３は二次元光検出器であり、透明容器
１１の底ζ：密着させるか、あるいは光ファイバなどを
利用して光を入射させる方法をとることができる。（ｂ
）はタングステンワイヤ１２の交差部分を拡大した斜視
図で、ワイヤ間の間隙にはＰｂ　、　Ｉｎなどの充填材
１４がつめられており、光および放射線に対するクロス
トーク抑制効果を増強している。6: This is a type in which a liquid scintillator (not shown) is poured. Reference numeral 13 denotes a two-dimensional photodetector, which may be placed in close contact with the bottom ζ of the transparent container 11, or may be incident with light using an optical fiber or the like. (b
) is an enlarged perspective view of the intersection of tungsten wires 12. The gap between the wires is filled with a filler 14 such as Pb, In, etc. to enhance the crosstalk suppressing effect against light and radiation.

この実施例Ｃ二よっても先の実施例と同様の効果が得ら
れる。微小な単位検出領域を区分する手段としても、蜂
の巣状コリメータ板を用いるよりこの実施例のようにワ
イヤを張りめぐらす方が容易に高精度化を図ることが可
能である。This embodiment C2 also provides the same effects as the previous embodiment. As a means for dividing minute unit detection areas, it is easier to achieve higher precision by stringing wires around as in this embodiment than by using honeycomb collimator plates.

なお、放射線阻止能の高いワイヤとして、ダンゲステン
の他、モリブデンや鉛その他の材料を用いることができ
る。　　　− （７）発明の効果 シンチレータを用いて、空間分解能の高い。In addition to Dungesten, molybdenum, lead, and other materials can be used as the wire having high radiation stopping power. - (7) Effects of the invention High spatial resolution is achieved by using a scintillator.

しかも高精度に製作し得る放射線検出器を提供できる。Moreover, it is possible to provide a radiation detector that can be manufactured with high precision.

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

第１図（ａ）　、　（ｂ）は本発明の実施例の放射線検
出器の入射端面側の平面図とその人−ム′断面図。 第２図（＆）　、　（ｂ）は他の実施例の要部を示す斜
視図とそのワイヤ交差部の拡大斜視図である。 １・・・シンチレータ（コア部）、２…グラステイツク
コ一テイング層（クラッド部）、、４＝−・タングステ
ンワイヤ、４・・・光反射膜、１１・・・容器。 １２・・・タングステンワイヤ、１３・・・光検出器。 １４・・・充填材。 出願人代理人　　弁理士　鈴　江　武　彦第１図 ＋＋＋ Ｌ検主港へFIGS. 1(a) and 1(b) are a plan view of the incident end surface side of a radiation detector according to an embodiment of the present invention and a cross-sectional view thereof. FIGS. 2(a) and 2(b) are a perspective view showing the main parts of another embodiment and an enlarged perspective view of the wire crossing portion thereof. DESCRIPTION OF SYMBOLS 1...Scintillator (core part), 2...Glass coating layer (cladding part), 4=--tungsten wire, 4...Light reflecting film, 11...Container. 12...Tungsten wire, 13...Photodetector. 14...Filling material. Applicant's agent Patent attorney Takehiko Suzue Figure 1 +++ L To the prosecutor's port

Claims (2)

【特許請求の範囲】[Claims] （１）相互Ｃ：分離されたシンチレータを有する複数の
単位検出＠埴の集合により構成され、各単位検出領域間
が放射線および光に対する阻止能の大なるワイヤ署二よ
り区分分離されていることを特徴とする放射線検出器。(1) Mutual C: It is composed of a set of multiple unit detection @ clays with separated scintillators, and each unit detection area is separated by a wire sign with a large stopping power against radiation and light. Characteristic radiation detector. （２）　　各単位検出領域はシンチレータをコア部とす
る光ファイノ月二より構成され、ワイヤは各光ファイΔ
の先端部：：巻きつけられている特許請求の範囲第１項
記載の放射線検出器。(2) Each unit detection area is composed of two optical fibers with a scintillator as the core, and the wire is connected to each optical fiber Δ
The radiation detector according to claim 1, wherein the distal end portion of the radiation detector is wrapped around the distal end portion of the radiation detector.
JP17376581A 1981-10-30 1981-10-30 Radiation detector Pending JPS5875082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17376581A JPS5875082A (en) 1981-10-30 1981-10-30 Radiation detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17376581A JPS5875082A (en) 1981-10-30 1981-10-30 Radiation detector

Publications (1)

Publication Number Publication Date
JPS5875082A true JPS5875082A (en) 1983-05-06

Family

ID=15966723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17376581A Pending JPS5875082A (en) 1981-10-30 1981-10-30 Radiation detector

Country Status (1)

Country Link
JP (1) JPS5875082A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62105400A (en) * 1985-10-31 1987-05-15 Toshiba Corp X-ray detector
JP2006349454A (en) * 2005-06-15 2006-12-28 Acrorad Co Ltd Collimator and detection device using the same
US9765950B2 (en) 2012-04-12 2017-09-19 3M Innovative Properties Company Fluorescent fiber light sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62105400A (en) * 1985-10-31 1987-05-15 Toshiba Corp X-ray detector
JP2006349454A (en) * 2005-06-15 2006-12-28 Acrorad Co Ltd Collimator and detection device using the same
US9765950B2 (en) 2012-04-12 2017-09-19 3M Innovative Properties Company Fluorescent fiber light sensor

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