JPS6385484A - Radiation detector - Google Patents
Radiation detectorInfo
- Publication number
- JPS6385484A JPS6385484A JP61233468A JP23346886A JPS6385484A JP S6385484 A JPS6385484 A JP S6385484A JP 61233468 A JP61233468 A JP 61233468A JP 23346886 A JP23346886 A JP 23346886A JP S6385484 A JPS6385484 A JP S6385484A
- Authority
- JP
- Japan
- Prior art keywords
- scintillator
- rays
- elements
- radiation
- parts
- 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
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 49
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は放射線検出器に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to radiation detectors.
（従来の技術）
一般に、被検体を透過した放射線からその被検体の放射
線情報を検出するために放射線検出器が用いられている
。(Prior Art) Generally, a radiation detector is used to detect radiation information of a subject from radiation transmitted through the subject.
このような放射線検出器の従来例を第３図を参照して説
明する。A conventional example of such a radiation detector will be explained with reference to FIG.
同図に示す放射線検出器２０は、同図にｄ３いて矢印方
向から入射する放射線（Ｘ線）を吸収覆るコリメータ素
子２３を、複数個所定間隔を隔てて配列するとともに、
この各コリメータ素子２３の壁面に取り付けられたシン
チレータ２１及び光電変換素子２２の重合体を有し、シ
ンチレータ２１に入射する放射線をその強度に応じた光
イム月に変換し、さらにこの光信号を光電変換素子２２
で電気信号に変換して、大剣放射線に基く断層像を形成
するようになっている。The radiation detector 20 shown in the same figure has a plurality of collimator elements 23 arranged at predetermined intervals to absorb and cover radiation (X-rays) incident from the direction of the arrow d3 in the figure.
Each collimator element 23 has a polymer of a scintillator 21 and a photoelectric conversion element 22 attached to the wall surface, converts the radiation incident on the scintillator 21 into a light beam according to its intensity, and further converts this optical signal into a photoelectric converter. Conversion element 22
The system converts the signals into electrical signals to form tomographic images based on the long-distance radiation.
尚、同図中、２４は光疏蔽層である。In addition, in the same figure, 24 is a light-scavenging layer.
しかしながら、上記構成のｌｊ’ｌ川線検出線検出器２
０リメータ素子２３にシンチレータ２１が一体的に取り
付けられ、その放射線入Ｑ」面が全面的に開放されてい
るため、この放ｑ］線人剣面の端部を通過する端部Ｘ線
による放射線情報の乱れをｌ５ＩＩ 、＋Ｌできないと
いう問題がある。However, the lj'l river line detection line detector 2 with the above configuration
The scintillator 21 is integrally attached to the zero meter element 23, and its radiation entrance Q' surface is completely open, so that the radiation from the edge X-rays passing through the end of this radiation There is a problem in that it is not possible to prevent information from being disrupted.
（発明が解決しようと覆る問題点）
上述のように従来の放射線検出器では、シンチレータに
おける端部Ｘ線の影響が生じるという問題がある。(Problems to be Solved by the Invention) As described above, in conventional radiation detectors, there is a problem in that the scintillator is affected by end X-rays.
そこで本発明は、端部Ｘ線による放射線情報の乱れを回
避でき良質な放射線情報を得ることができ、ざらに、組
立時の精度に余裕をもたぜることかできる放射線検出器
を提供することを目的とするものである。Therefore, the present invention provides a radiation detector that can avoid the disturbance of radiation information due to edge X-rays, can obtain high-quality radiation information, and can also provide a margin for accuracy during assembly. The purpose is to
［発明の構成］
（問題点を解決するための手段）
本発明の放射線検出器は、コリメータ配列体を経て入射
する放射線をその強度に応じた光信号に変換する放射線
検出器において、コリメータ配列体とは分離して配置さ
れたシンチレータ配列体を構成する各シンチレータ素子
相互間及び両端部を放射線から遮蔽するとともに各シン
チレータ素子の端部領域を閉塞する放射線遮蔽部材を有
して構成されている。[Structure of the Invention] (Means for Solving the Problems) The radiation detector of the present invention is a radiation detector that converts radiation incident through a collimator array into an optical signal according to its intensity. The scintillator array is arranged separately from the scintillator array, and includes a radiation shielding member that shields each scintillator element between each other and both ends of the scintillator array from radiation, and closes the end region of each scintillator element.
（作 用） 次に上記構成の放射線検出器の作用を説明す′る。(for production) Next, the operation of the radiation detector having the above configuration will be explained.
コリメータ配列体を経てこの」リメータ配列体とは分離
して配置された各シンチレータ素子に入射する放射線は
、各シンチレータ素子の放射線入射面側で放射線遮蔽部
材ににりその一部が、ｌＩｊち、放射線検出器のうち端
部領域に入射する部分が遮蔽される。The radiation that passes through the collimator array and enters each scintillator element arranged separately from the collimator array enters the radiation shielding member on the radiation incident surface side of each scintillator element, and a portion of the radiation enters the radiation shielding member on the radiation incident surface side of each scintillator element. A portion of the radiation detector that is incident on the end region is shielded.
これにより、各シンチレータ素子の端部への放射線の入
射が阻止される。This prevents radiation from entering the end of each scintillator element.
また、」リメータ配列体と、各シンチレータ素子及び放
射線遮蔽部（Ａとの配置にずれが生じても放射線遮蔽部
材の存在により上述した作用を組積することができる。Further, even if there is a misalignment in the arrangement of the remeter array, each scintillator element, and the radiation shielding part (A), the above-mentioned effect can be achieved due to the presence of the radiation shielding member.
（実施例） 以下に本発明の実施例を第１図を参照して説明する。(Example) An embodiment of the present invention will be described below with reference to FIG.
第１図に示す放射線検出器１は、Ｘ線吸収機能を有する
例えばタンタルにより形成された任意個数のコリメータ
素子２ａ乃至２ｈを、相４Ｉ間に所定の間隔を有しつつ
平行配置してなる１リメータ配列体２と、前記各」リメ
ータ素子２ａ乃至２ｈのそれぞれの間の間隔と略等しい
幅を有し、かつ、各コリメータ素子２ａ乃至２ｈ側にＸ
線入射面を向けつつ豆いに平行に配列されたシンチレー
タ素子３ａ乃至３ｇからなるシンチレータ配列体３と、
両端部のシンチレータ素子３ａ、３Ｑの外側側面を被覆
するＸ線遮蔽部材４ａ、４ｈ及び各シンチレータ索了３
ａ乃至３０間に配置されたＸ線遮蔽部材４ｂ乃至４ｇか
らなるＸ線遮蔽部材群４と、前記各シンチレータ素子３
ａ乃至３Ωのそれぞれの第１図において下側端部に取り
付けられたフォｌ〜ダイオードのような光電変換素子５
ａ乃至５ｑからなる光電変換素子群５と、この光電変換
素子５ａ乃至５ｇ及び各シンチレータ素子３ａ乃至３ｑ
のまわりに被覆された光遮蔽部６と、前記シンチレータ
配列体３．Ｘ線遮蔽部材群４．光電変換素子群５を支持
する基板７とを有して構成されている。A radiation detector 1 shown in FIG. 1 includes an arbitrary number of collimator elements 2a to 2h made of tantalum, for example, having an X-ray absorption function and arranged in parallel with a predetermined interval between phases 4I. It has a width approximately equal to the interval between the remeter array 2 and each of the remeter elements 2a to 2h, and has an X on the side of each collimator element 2a to 2h.
A scintillator array 3 consisting of scintillator elements 3a to 3g arranged parallel to each other with their ray incident surfaces facing;
X-ray shielding members 4a, 4h covering the outer side surfaces of the scintillator elements 3a, 3Q at both ends and each scintillator cable 3
an X-ray shielding member group 4 consisting of X-ray shielding members 4b to 4g arranged between a to 30, and each of the scintillator elements 3;
The photoelectric conversion element 5, such as a diode, is attached to the lower end of each of a to 3Ω in FIG.
A photoelectric conversion element group 5 consisting of a to 5q, the photoelectric conversion elements 5a to 5g, and each scintillator element 3a to 3q.
a light shielding part 6 coated around the scintillator array 3. X-ray shielding member group 4. A substrate 7 that supports a photoelectric conversion element group 5 is configured.
そして、前記両Ｘ線遮蔽部材４．ａ、４ｈのＸ線入ｍ面
側は１．このシンチレータ素子３８．３ＱのＸ線入射面
よりもコリメータ配列体２側に突設され、かつ、シンチ
レータ素子３ａ、３Ｑそれぞれの外側端部を閉塞する板
厚部４８１．４Ｆ１１が形成されている。Both the X-ray shielding members 4. The X-ray entrance m side of a and 4h is 1. A thick plate portion 481.4F11 is formed that protrudes toward the collimator array 2 side from the X-ray incident surface of the scintillator element 38.3Q and closes the outer end portions of each of the scintillator elements 3a and 3Q.
また、前記Ｘ線遮蔽部＋Ａ４ｂ乃至４ｑは、各シンチレ
ータ素子３ａ乃至３ｇのＸ線入川面Ｊ−りもコリメータ
配列体２側に突設され、かつ、それぞれ両側に配置され
ている各シンチレータ素子３ａ乃至３ｑの各端部を閉塞
する板厚部４ｂ１乃至４Ｑ１が形成されている。Further, the X-ray shielding parts +A4b to 4q are provided so as to protrude from the X-ray entrance surface J of each of the scintillator elements 3a to 3g toward the collimator array 2 side, and are arranged on both sides of each scintillator element 3a. Thick plate portions 4b1 to 4Q1 are formed to close each end of 3q to 3q.
次に上記構成の放射線検出器１の作用を説明覆る。Next, the operation of the radiation detector 1 having the above configuration will be explained.
第１図に示す矢印方向から図示しない被検体を透過した
Ｘ線がコリメータ配列体２を経てシンチレータ配列体３
のＸ線入射面に至ると、このＸ線の一部は前記各板厚部
４ａ１乃至４．ｈｊに遮られ、各シンヂレータ素了３ａ
乃至３ｑのそれぞれの端部への入射が阻止されるととも
に、このＸ線の残余の部分が各シンチレータ素子３ａ乃
￥３０の端部以外の部分に入射する。X-rays transmitted through a subject (not shown) from the direction of the arrow shown in FIG.
When the X-rays reach the X-ray incident surface, a portion of the X-rays reach the respective plate thickness portions 4a1 to 4. Blocked by hj, each syndilator completes 3a
The X-rays are prevented from entering the respective ends of the scintillator elements 3a to 3q, and the remaining portions of the X-rays enter the parts other than the ends of the scintillator elements 3a to 30.
これににす、各シンチレータ素子３ａ乃至３ｇにおいて
端部Ｘ線による影響が生じることはない。In addition, there is no influence of end X-rays on each of the scintillator elements 3a to 3g.
そして、各シンヂレータ累子３ａ乃至３Ωに大川した端
部Ｘ線を含まない残余のＸ線は、これらによりそれぞれ
光信号に変換され、さらに、各光電変換索了５ａ乃至５
ｇにより電気信月に変換されて以後のＸ線情報に基く画
像形成処理等に供される。Then, the remaining X-rays not including the end X-rays that have reached each of the scintillator resistors 3a to 3Ω are converted into optical signals, and further, each of the photoelectric conversion cables 5a to 5
g, the data is converted into an electric signal and used for subsequent image formation processing based on X-ray information.
また、上記構成の放射線検出器１は、コリメータ配列体
２と、シンチレータ配列体３とが分離しでｄ３す、この
シンチレータ配列体３のコリメータ配列体２に対する位
置関係か多少ずれた状態で組Ｘ、ｌてられた場合にも、
前記各板厚部４ａ１乃至４ｔｌｌの存在により依然とし
て端部Ｘ線による影響を阻止することができ、これによ
り、組立精度に余裕をもたせることができる。Further, in the radiation detector 1 having the above configuration, the collimator array 2 and the scintillator array 3 are separated d3, and the positional relationship of the scintillator array 3 with respect to the collimator array 2 is slightly shifted. , even if you are let down,
The presence of each of the thick plate portions 4a1 to 4tll can still prevent the influence of end X-rays, thereby providing a margin for assembly accuracy.
第２図は本発明の実施例の他側を示すものであり、同図
に示す放射線検出器１Ａにおいて、第１図に承りものと
同一の機能を有するものには同一の符号を付し、その詳
細な説明は省略する。FIG. 2 shows the other side of the embodiment of the present invention, and in the radiation detector 1A shown in the same figure, parts having the same functions as those shown in FIG. 1 are given the same reference numerals. A detailed explanation thereof will be omitted.
この放口４線検出器１Ａが、第１図に示暇−ｂのと相違
する点は、個々のシンチレータ索子３ａ。The difference between this four-wire detector 1A and the one shown in FIG. 1 is the individual scintillator cords 3a.
３ｂ、３ｃ毎に、その両側を被覆すると共にＸ線７１’
ｌ而側に板厚部１４ａ１．１４ａ２．１４ｂ１ 。3b and 3c, cover both sides and X-ray 71'
Thick plate portion 14a1.14a2.14b1 on the l side.
１４ｂ２．１４０１．１４Ｃ２をそれぞれ右するＸ線遮
蔽部材１４８．１ｍ、ｂ、１７１ｃを備え、これらを重
合配置したことである。14b2.1401.14C2 is provided with X-ray shielding members 148.1m, b, and 171c on the right, respectively, and these are arranged in an overlapping manner.
このような構成の放射線検出器１△によっても、上述し
た放射線検出器１の揚台と同様な機能を発揮させること
ができる。The radiation detector 1Δ having such a configuration can also exhibit the same function as the platform of the radiation detector 1 described above.
本発明は、上述した実施例に限定されるものではなく、
その要旨の範囲内で種々の変形が可能である。The present invention is not limited to the embodiments described above,
Various modifications are possible within the scope of the gist.
例えば、」リメータ素子、シンチレータ素子の列設個数
は、上述した場合のばか任意の個数のものとして実施で
きる。For example, the number of remeter elements and scintillator elements arranged in a row can be any number as described above.
［発明の効果］
以上詳述した本発明にＪ、れば、端部Ｘ線による影響を
阻止して良質な放射線情報を収集できるとともに、組立
精度の余裕をらもた°けることかできる敢ｑ４線検出器
を提供することができる。[Effects of the Invention] If the present invention described in detail above is applied, it is possible to prevent the influence of edge X-rays and collect high-quality radiation information, and at the same time, it is possible to obtain a margin for assembly accuracy. A q4-ray detector can be provided.
第１図は本発明の実施例を示ず概略断面図、第２図は本
発明の実施例の他例を示ず概略断面図、第３図は従来の
放射線検出器を示す概略断面図である。
１・・・放射線検出器、２・・・」リメータ配列体、３
・・・シンチレータ配列体、４・・・Ｘ線遮蔽部材群、
５・・・光重変換素子群。
×碌Fig. 1 is a schematic sectional view showing an embodiment of the present invention, Fig. 2 is a schematic sectional view showing other embodiments of the invention, and Fig. 3 is a schematic sectional view showing a conventional radiation detector. be. 1... Radiation detector, 2...'' remeter array, 3
... scintillator array, 4... X-ray shielding member group,
5... Light weight conversion element group. × 碌
Claims (1)
じた光信号に変換する放射線検出器において、コリメー
タ配列体とは分離して配置されたシンチレータ配列体を
構成する各シンチレータ素子相互間及び両端部を放射線
から遮蔽するとともに各シンチレータ素子の端部領域を
閉塞する放射線遮蔽部材を有することを特徴とする放射
線検出器。In a radiation detector that converts radiation incident through a collimator array into an optical signal according to its intensity, the scintillator elements constituting the scintillator array, which are arranged separately from the collimator array, are arranged between each other and at both ends. A radiation detector comprising a radiation shielding member that shields from radiation and closes an end region of each scintillator element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61233468A JPS6385484A (en) | 1986-09-30 | 1986-09-30 | Radiation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61233468A JPS6385484A (en) | 1986-09-30 | 1986-09-30 | Radiation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6385484A true JPS6385484A (en) | 1988-04-15 |
Family
ID=16955499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61233468A Pending JPS6385484A (en) | 1986-09-30 | 1986-09-30 | Radiation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6385484A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5373162A (en) * | 1992-03-13 | 1994-12-13 | Kabushiki Kaisha Toshiba | Radiation detector for limiting effects of shading |
| JP2001296364A (en) * | 2000-02-07 | 2001-10-26 | General Electric Co <Ge> | Self aligning x-ray damage shield for inter-scintillator, reflector and method of manufacture |
| NL1026195C2 (en) * | 2003-05-13 | 2007-05-30 | Ge Med Sys Global Tech Co Llc | Collimator assembly for computer tomography system. |
| JP2009511104A (en) * | 2005-10-05 | 2009-03-19 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Computer tomography detector using thin circuit |
| JP2013029495A (en) * | 2011-06-17 | 2013-02-07 | General Electric Co <Ge> | Methods and apparatus for collimation of detector |
| WO2015098631A1 (en) * | 2013-12-27 | 2015-07-02 | 株式会社 日立メディコ | Radiation detector and x-ray ct device |
-
1986
- 1986-09-30 JP JP61233468A patent/JPS6385484A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5373162A (en) * | 1992-03-13 | 1994-12-13 | Kabushiki Kaisha Toshiba | Radiation detector for limiting effects of shading |
| JP2001296364A (en) * | 2000-02-07 | 2001-10-26 | General Electric Co <Ge> | Self aligning x-ray damage shield for inter-scintillator, reflector and method of manufacture |
| NL1026195C2 (en) * | 2003-05-13 | 2007-05-30 | Ge Med Sys Global Tech Co Llc | Collimator assembly for computer tomography system. |
| JP2009511104A (en) * | 2005-10-05 | 2009-03-19 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Computer tomography detector using thin circuit |
| JP2013029495A (en) * | 2011-06-17 | 2013-02-07 | General Electric Co <Ge> | Methods and apparatus for collimation of detector |
| WO2015098631A1 (en) * | 2013-12-27 | 2015-07-02 | 株式会社 日立メディコ | Radiation detector and x-ray ct device |
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